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Agitator

Mixers are devices that blend combinations of liquids and solids into a homogenous product. They come in a variety of sizes and configurations designed for specific applications. Agitators provide the mechanical action required to keep dissolved or suspended solids in solution. [Pg.353]

Both operate on basically the same principles, but variations in design, operating speed, and applications divide the actual function of these devices. Agitators generally work just as hard as mixers, and the terms are often used interchangeably. [Pg.353]

There are two primary types of mixers propeller/paddle and screw. Screw mixers can be further divided into two types batch and mixer-extruder. [Pg.353]

The screw mixer uses a single- or dual-screw arrangement to mix liquids, solids, or a combination of both. It comes in two basic configurations batch and combination mixer-extruder. [Pg.354]

The screw configuration is normally either a ribbon-type helical screw or a series of paddles mounted on a common shaft. Materials of construction are selected based on the specific application and materials to be mixed. [Pg.354]


In this accident, the steam was isolated from the reactor containing the unfinished batch and the agitator was switched ofiF. The steam used to heat the reactor was the exhaust from a steam turbine at 190 C but which rose to about 300°C when the plant was shutdown. The reactor walls below the liquid level fell to the same temperature as the liquid, around 160°C. The reactor walls above the liquid level remained hotter because of the high-temperature steam at shutdown (but now isolated). Heat then passed by conduction and radiation from the walls to the top layer of the stagnant liquid, which became hot enough for a runaway reaction to start (see Fig. 9.3). Once started in the upper layer, the reaction then propagated throughout the reactor. If the steam had been cooler, say, 180 C, the runaway could not have occurred. ... [Pg.264]

TATTERSON Fluid Mixing and Gas Dispersion in Agitated Tanks TATTERSON Scale-up of Industrial Mixing Processes VVILLIG Environmental TQM... [Pg.462]

Before withdrawing a sample it is necessary to agitate it, even if it is a gas, and eventually heat the sample being careful to stay below temperatures which could cause evaporation of the lighter components. [Pg.28]

If agitation and heating are not practical as in the cases of large volumes, it is better to withdraw samples from various levels in order to get an average sample. [Pg.28]

The pour point is the lowest temperature at which an oil can still pour while it is cooled, without agitation, under standardized conditions. The pour point of paraffinic bases is linked to the crystallization of n-paraffins. The pour point of naphthenic bases is related to a significant viscosity increase at low temperatures. This property can be improved by additives. [Pg.283]

The pour point of crude oils is measured to give an approximate indication as to their pumpability . In fact, the agitation of the fluid brought on by pumping can stop, slow down or destroy the formation of crystals, conferring on the crude additional fluidity beyond that of the measured pour point temperature. [Pg.317]

Certain calibrated orifice instruments (Engler-type) provide viscosity measurements at temperature lower than pour point. This is possible because the apparatus agitates the material to the point where large crystals are prevented from forming whereas in other methods, the sample pour point is measured without agitation. [Pg.318]

The crankcase of a gasoline or diesel engine is in reality a hydrocarbon oxidation reactor oil is submitted to strong agitation in the presence of air at high temperature (120°C) furthermore, metals such as copper and iron, excellent catalysts for oxidation, are present in the surroundings. [Pg.358]

Antirust properties (inhibited mineral oils) NFT 60-151 ISO 7120 ASTM D 665 Spots on a test tube after agitation with oil water... [Pg.446]

If oil and water are mixed as an emulsion, dehydration becomes much more difficult. Emulsions can form as oil-in-water or water-in-oil if mixed production streams are subjected to severe turbulence, as might occur in front of perforations in the borehole. Emulsions can be encouraged to break (or destabilise) using chemicals, heat or just gentle agitation. Chemical destabilisation is the most common method and laboratory tests would normally be conducted to determine the most suitable combination of chemicals. [Pg.248]

Prior to about 1920, flotation procedures were rather crude and rested primarily on the observation that copper and lead-zinc ore pulps (crushed ore mixed with water) could be benefacted (improved in mineral content) by treatment with large amounts of fatty and oily materials. The mineral particles collected in the oily layer and thus could be separated from the gangue and the water. Since then, oil flotation has been largely replaced by froth or foam flotation. Here, only minor amounts of oil or surfactant are used and a froth is formed by agitating or bubbling air through the suspension. The oily froth or foam is concentrated in mineral particles and can be skimmed off as shown schematically in Fig. XIII-4. [Pg.472]

If two pure, immiscible liquids, such as benzene and water, are vigorously shaken together, they will form a dispersion, but it is doubtful that one phase or the other will be uniquely continuous or dispersed. On stopping the agitation, phase separation occurs so quickly that it is questionable whether the term emulsion really should be applied to the system. A surfactant component is generally needed to obtain a stable or reasonably stable emulsion. Thus, if a little soap is added to the benzene-water system, the result on shaking is a true emulsion that separates out only very slowly. Theories of... [Pg.503]

It is quite clear, first of all, that since emulsions present a large interfacial area, any reduction in interfacial tension must reduce the driving force toward coalescence and should promote stability. We have here, then, a simple thermodynamic basis for the role of emulsifying agents. Harkins [17] mentions, as an example, the case of the system paraffin oil-water. With pure liquids, the inter-facial tension was 41 dyn/cm, and this was reduced to 31 dyn/cm on making the aqueous phase 0.00 IM in oleic acid, under which conditions a reasonably stable emulsion could be formed. On neutralization by 0.001 M sodium hydroxide, the interfacial tension fell to 7.2 dyn/cm, and if also made O.OOIM in sodium chloride, it became less than 0.01 dyn/cm. With olive oil in place of the paraffin oil, the final interfacial tension was 0.002 dyn/cm. These last systems emulsified spontaneously—that is, on combining the oil and water phases, no agitation was needed for emulsification to occur. [Pg.504]

The diffusion layer widtli is very much dependent on tire degree of agitation of tire electrolyte. Thus, via tire parameter 5, tire hydrodynamics of tire solution can be considered. Experimentally, defined hydrodynamic conditions are achieved by a rotating cylinder, disc or ring-disc electrodes, for which analytical solutions for tire diffusion equation are available [37, 4T, 42 and 43]. [Pg.2721]

A useful stirrer—sometimes termed a Hershberg stirrer— Fig. 11,7,5. for efficient agitation in round-bottomed vessels, even of... [Pg.64]

Mercury-sealed stirrers are used in the following operations (1) simultaneous stirring and refluxing of a reaction mixture (2) stirring the contents of a closed vessel (3) agitation with prevention of the escape of a gas or vapour and (4) stirring in an inert atmosphere, such as... [Pg.66]

Zinc cyanide. Solutions of the reactants are prepared by dis solving 100 g. of technical sodium cyanide (97-98 per cent. NaCN) in 125 ml. of water and 150 g. of anhydrous zinc chloride in the minimum volume of 50 per cent, alcohol (1). The sodium cyanide solution is added rapidly, with agitation, to the zinc chloride solution. The precipitated zinc cyanide is filtered off at the pump, drained well, washed with alcohol and then with ether. It is dried in a desiccator or in an air bath at 50°, and preserved in a tightly stoppered bottle. The yield is almost quantitative and the zinc cyanide has a purity of 95-98 per cent. (2). It has been stated that highly purified zinc cyanide does not react in the Adams modification of the Gattermann reaction (compare Section IV,12l). The product, prepared by the above method is, however, highly satisfactory. Commercial zinc cyanide may also be used. [Pg.201]

Triturate 20 g. of dry o-toluidine hydrochloride and 35 5 g. of powdered iodine in a mortar and then grind in 17 -5 g. of precipitated calcium carbonate. Transfer the mixture to a conical flask, and add 100 ml. of distilled water with vigorous shaking of the flask. Allow the mixture to stand for 45 minutes with occasional agitation, then heat gradually to 60-70° for 5 minutes, and cool. Transfer the contents of the flask to a separatory funnel, extract the base with three 80 ml. portions of ether, diy the extract with anhydrous calcium chloride or magnesium sulphate, and remove the excess of solvent. The crude 5-iodo-2-aminotoluene separates in dark crystals. The yield is 32 g. Recrystallise from 50 per cent, alcohol nearly white crystals, m.p. 87°, are obtained. [Pg.648]

Solubility in concentrated sulphuric acid. Place 3 0 ml. of pure concentrated sulphuric acid in a dry test-tube and add 0 -10 g. of a solid or 0 -20 ml. of a liquid. If the compound does not dissolve immediately, agitate for some time but do not heat. Observe any change in colour, charring, evolution of gaseous products, polymerisation accompanied by precipitation etc. [Pg.1056]


See other pages where Agitator is mentioned: [Pg.53]    [Pg.264]    [Pg.316]    [Pg.18]    [Pg.180]    [Pg.345]    [Pg.606]    [Pg.57]    [Pg.110]    [Pg.124]    [Pg.227]    [Pg.486]    [Pg.661]    [Pg.1933]    [Pg.2784]    [Pg.68]    [Pg.270]    [Pg.38]    [Pg.62]    [Pg.62]    [Pg.62]    [Pg.252]    [Pg.263]    [Pg.699]    [Pg.732]    [Pg.757]    [Pg.868]    [Pg.869]    [Pg.869]    [Pg.873]    [Pg.874]   
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AGITATION INCIDENTS

Aeration agitators

Aeration-agitation

Aeration-agitation bioreactor

Agents and agitators

Agglomeration agitation

Agitated

Agitated Grinding

Agitated Stirred Tanks

Agitated Suspension

Agitated Vessels, Boiling, Nongassed

Agitated Vessels, Hot Gassed Systems

Agitated aniline

Agitated ball mills

Agitated batch driers

Agitated cell reactor

Agitated columns

Agitated culture

Agitated depression serotonin

Agitated depression symptoms

Agitated extraction columns

Agitated extraction tower

Agitated extractors

Agitated falling film

Agitated feeder

Agitated fermenter design

Agitated films

Agitated fluid bed

Agitated mills

Agitated mini-autoclaves

Agitated mold surface

Agitated polymerization reactors

Agitated processing

Agitated reactors

Agitated reactors calculation

Agitated reactors hydrodynamics

Agitated reactors impeller power

Agitated reactors interfacial area

Agitated reactors mass transfer coefficient

Agitated reactors mixing

Agitated reactors power dissipation

Agitated reactors solid-liquid, mixing

Agitated slurry reactor

Agitated slurry reactor modeling

Agitated soil measurement

Agitated suspension crystallizers

Agitated tank example

Agitated tank flow patterns

Agitated tank reactor

Agitated tank slurry

Agitated tests

Agitated thin-film evaporator

Agitated thin-film evaporators

Agitated vessel flow patterns

Agitated vessels

Agitated vessels 1114 INDEX

Agitated vessels adsorption

Agitated vessels baffles

Agitated vessels circulation rate

Agitated vessels dimensional analysis

Agitated vessels dispersion

Agitated vessels dissolution time

Agitated vessels draft tubes

Agitated vessels efficiency

Agitated vessels flow number

Agitated vessels gases

Agitated vessels heat transfer

Agitated vessels leaching

Agitated vessels liquid extraction

Agitated vessels liquids

Agitated vessels mixing

Agitated vessels power consumption

Agitated vessels power requirements

Agitated vessels, absorption

Agitated vessels, jackets

Agitated vessels, temperature

Agitated-Kettle Type

Agitated-Pan Type

Agitated-pan dryers

Agitation

Agitation

Agitation Intensity—Low Deformability Growth

Agitation Reynolds number

Agitation aggression and

Agitation agonists

Agitation and Aeration

Agitation and Fluid Mixing Technology

Agitation and Heat Transfer in Suspensions

Agitation antipsychotics

Agitation baffles

Agitation benzodiazepines

Agitation by air

Agitation caffeine

Agitation caused

Agitation circulation rate

Agitation configuration

Agitation copper

Agitation cultures

Agitation delirium and

Agitation depression and

Agitation efficiency

Agitation equipment

Agitation equipment for

Agitation equipment selection

Agitation failure

Agitation flow patterns

Agitation fluid jets

Agitation from SSRIs

Agitation from TCAs

Agitation from antidepressants

Agitation from fluoxetine

Agitation heat transfer

Agitation intensity

Agitation jacket vessels

Agitation leaching

Agitation method, SPME

Agitation methods — mixer agglomeration

Agitation methods — tumbling agglomeration

Agitation methylphenidate

Agitation mills

Agitation mixing time

Agitation motionless mixers

Agitation muscarinic

Agitation nozzles, jackets

Agitation of Fluids

Agitation of Sample

Agitation of non-Newtonian fluids

Agitation of the Surface Sub-layer

Agitation performance

Agitation power

Agitation power consumption

Agitation power used

Agitation psychomotor

Agitation purposes

Agitation rate

Agitation requirement

Agitation sevoflurane

Agitation solid-liquid, critical impeller speed

Agitation speed

Agitation system

Agitation tests

Agitation three phase reactions

Agitation time, effect, dispersant

Agitation treatment

Agitation type flotation cell

Agitation variables

Agitation vessels

Agitation vitamin

Agitation washers

Agitation, Gas-Liquid Contact

Agitation, current density distribution

Agitation, defined

Agitation, effect

Agitation, effectiveness

Agitation-dependent

Agitation/psychosis caused

Agitator Effectiveness

Agitator Granulators

Agitator Seals

Agitator Speed

Agitator anchor

Agitator ball mills

Agitator blades

Agitator constant

Agitator design

Agitator failure

Agitator helical

Agitator helical ribbon

Agitator hollow shaft

Agitator installation

Agitator mixer, types

Agitator power

Agitator power tank)

Agitator sealing

Agitator shafts

Agitator turbine

Agitator, baffle paddle

Agitators configuration

Agitators costs

Agitators critical speed

Agitators forces

Agitators high viscosity liquids

Agitators impellers

Agitators in tanks

Agitators integrated

Agitators or agitation

Agitators paddles

Agitators power consumption

Agitators propeller-type

Agitators propellers

Agitators selection

Agitators side-entering

Agitators standard turbine design

Agitators types

Agitators, helical pipe coils with

Agitators, power requirements

Agitators, power requirements selection

Agitators, power requirements types

Agitators, rotating

Agitators, scale

Air agitation

Air for agitation

Air-agitated fermenters

Anticholinergic drugs agitation

Autoclaves, agitated

Batch Agitated and Rotating Dryers

Batch reactor agitation

Biological agitation

Bioprocess agitation

Bottom-entering agitators

Brownian motion thermal agitation

Brownian particles thermal agitation

Bubble agitation

Bubble diameter agitated vessels

Bubble reactors, mechanically agitated

CSTR turbine agitated

Case A. Continuous Heating in an Agitated Tank

Centrally mounted agitators

Chemical engineering agitation

Circulation and mixing times in turbulent agitated tanks

Cold extraction by agitation

Columns agitated, multistage

Comminution agitated ball mills

Concentration polarization agitation

Contact Drying in an Agitated Filter Dryer

Contactors, mechanically agitated

Continuous agitation

Continuous agitation, method

Continuous stirred tank reactors agitators/impellers

Countercurrent extractors (mechanically-agitated

Crystal growth with interfacial agitation

Crystallization agitation

Crystallization agitators

Crystallization with agitation

Crystallizers agitated vessels

Crystallizers agitators

Depression agitated

Dextromethorphan agitation

Dissolution of Granular Solids in an Agitated Vessel

Dissolution rate agitation

Dorr agitators

Double-impeller agitator

Draft tube agitation

Dryers agitated

Drying equipment continuous agitated dryers

Drying equipment heated agitators

Effect of Agitation Speed

Effect of agitation

Electrolyte Agitation

Electrolyte agitated

Emulsification, agitators

Emulsions [continued agitation

Emulsions mechanical agitation

Enclosed agitated vacuum filters

Energy level and thermal agitation

Equipment Agitated cell reactor

Estimating Temperature Profiles in Agitated Tanks

Evaporation agitated thin-film evaporator

Evaporator agitator

Evaporators Agitated

Evaporators agitated-film

Experimentation with Agitated Systems

Extraction agitated tower extractors

Extraction agitated vessels

Extraction equipment rotary, agitated

Extraction mechanically agitated columns

Extraction optimized design of agitated vessels

Extraction processes agitated devices

Extraction processes agitators

Extraction rotary-agitated column

Extractor agitated column

Facilitization agitation

Fermentation agitation

Film development agitation types

Flow Field in Agitated Dispersions

Flow Fields in Agitated Tanks

Flow number, agitation

Flow number, agitation limiting values

Fluid mixing stirred tank agitation

Food crystallization agitation

Gas Sparging with Mechanical Agitation

Gas Sparging with No Mechanical Agitation

Gas-liquid mixing, in agitated reactors

Gassed Agitated Vessels, Nonboiling

General Characteristics of Mixing Processes and Agitated Vessels

Gypsum Agitator

Heat Transfer Coils in Tank, Liquid Agitated

Heat product agitation during

Heat transfer coefficients agitated vessels

Heat transfer coefficients in agitators

Heat transfer in agitated vessels

Heat-transfer coefficients in agitated vessels

High Agitation Intensity Growth

ING AND AGITATION

Impellers and Agitation Systems

Impellers single-phase liquids agitated

Impellers, agitation

Impellers, agitation kinds

Impellers, agitation location

Impellers, agitation sizing example

Influence of agitation and synthesis

Influence of agitation and synthesis temperature

Influencing factors agitation speed

Intensity high agitation

Intermittent agitation, method

Jacketed vessels agitation

Jackets and Coils of Agitated Vessels

Ketamine agitation

Langevin equation thermal agitation

Large blade low speed agitators

Leaching agitated tanks

Leaching processes, agitators

Leaching, agitation copper

Leaching, agitation temperature

Lipolysis agitation induced

Liquid Mixing in Agitated Reactors Richard V. Calabrese, ouglas E. Leng, and Piero M. Armenante

Liquid-phase reactants agitator

Liquid-solid agitation

Magnetic agitation

Mass Transfer Regimes in Mechanically Agitated Solid-Liquid Systems

Mass Transfer in Agitated Solid-Liquid Systems

Mass transfer coefficients agitated vessels

Mass transfer in agitated vessels

Mass transport agitation effect

Mass-transfer coefficients in agitated vessels

Maximum agitation volume

Mechanical Agitators

Mechanical agitation

Mechanical agitation enzymes

Mechanical agitator design

Mechanically Agitated Columns

Mechanically Agitated Flash Dryers

Mechanically Agitated Thin-Film Evaporators

Mechanically agitated contactor

Mechanically agitated in-vessel

Mechanically agitated processes

Mechanically agitated processes parameters

Mechanically agitated vessels

Mechanically-agitated extractors

Metoclopramide agitation

Midazolam agitation

Minimal agitation, method

Minimum agitation volume

Mixer paddle-agitator

Mixers and agitators

Mixers-settlers mechanical agitation

Mixers-settlers vessels, agitated

Monolithic agitator

Multistage Agitated Tanks

Multistage mechanically agitated reactors

Neuroleptic-Induced Anguish, Including Agitation, Despair, and Depression

Neuroleptics agitation from

Nitrous oxide agitation

Non-Agitated Gravity Flow Extractors

Other Rotary Agitated Towers

Paddle agitation

Pendulum agitators

Plate agitator

Pneumatically agitated systems

Power Consumption in Agitation

Power consumption of agitators

Power requirement for agitation

Power solid-liquid agitated systems

Prepolymer agitation

Reaction parameters agitation

Reaction rate agitation effect

Reactor 1 Agitated Mini-autoclaves

Reactor agitation

Reactor agitator failure

Reactor with Agitators

Reactor with multiple-impeller agitator

Reactors batch agitated

Reactors, agitated tank backmix

Reactors, agitated tank backmixing

Reactors, agitated tank batch

Recommendations for Agitated Vessels

Recovery agitation

Recovery agitation ketamine

Reynolds number in agitation

Rinse Bath Agitation

Rotational relaxation, thermal agitation

RubCon Mixture Agitation Process

Rules of thumb mixing and agitation, xvii

SSRIs agitation caused

Scale agitated vessels

Scale of agitation

Scale-of-Agitation Approach

Scale-of-Agitation Approach Example

Scale-of-Agitation Approach for Suspensions

Scale-of-agitation methods

Scale-up of Agitated Centrifugal Mixers

Selection of Agitators

Semi-continuously agitated systems

Serotonin reuptake inhibitors agitation caused

Shaking (agitation) procedure

Single-impeller agitator

Single-phase liquids agitated

Single-phase liquids, mechanical agitation

Sleeve-and-propeller agitator

Slurries agitation

Slurry reactor mechanically agitated

Slurry reactor multiple-agitator

Small blade high speed agitators

Solid-liquid agitated systems

Solubility, common batch agitation

Solvent agitating bath

Stem cells agitation

Stirred Tank Agitation

Tanks and agitation

Tanks, agitated

Temperature profiles, agitated tanks

The Risk of Agitated Depression

Theophylline agitation caused

Thermal Agitation and the Force of Gravity

Thermal agitation

Thickeners mechanically agitated

Thin agitated falling film

Three-phase slurry reactors agitated tanks

Transient holdup profiles in an agitated

Transient holdup profiles in an agitated extractor

Tricyclic antidepressants agitation from

Tumbling agitator

Types of agitators

Ultrasonic agitation

Vortex agitator

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