Process period

Air Drying Equipment. Tunnel kiln dryers (70) are long furnaces comprised of several zones of different temperature, humidity, and air flow through which the ware travels on a moving car or belt. These kilns afford continuous processing. Periodic kiln cross-circulation dryers (70) are box furnaces in which ware is stacked on permanent racks or on a car that can be shuttled in and out of the furnace. Fans or jets are used to circulate heat uniformly through the ware. The process is not continuous, but production rates can be enhanced by shuttling multiple cars. 

Unsteady-State Direct Oxidation Process. Periodic iatermption of the feeds can be used to reduce the sharp temperature gradients associated with the conventional oxidation of ethylene over a silver catalyst (209). Steady and periodic operation of a packed-bed reactor has been iavestigated for the production of ethylene oxide (210). By periodically varyiag the inlet feed concentration of ethylene or oxygen, or both, considerable improvements ia the selectivity to ethylene oxide were claimed. 

The specimen and reaction mixture are placed in the reaction vessel, which is attached to a reflux condenser. Heat is then applied and the onset of boiling in the reaction mixture is taken as the start of the process. Periodically thereafter, carbon dioxide absorption tubes are removed from the train and replaced by tubes of known weight. Some experiments have been conducted19 in which the reflux mixture was brought to a boil and the test specimen thereafter introduced through a side tube in the reaction flask. This procedure insures that the reaction period... 

The standard processing period for drug approval according to the MHLW is as follows ... 

After definition of the water type required, the water pipeline must be validated in order to ensure an adequate flow and purity (chemical and microbiological) of water. After the validation process, periodic verification of the pipeline and water collection points is required. This verification must be based on well-defined SOPs. 

Figure 8.1-17. Influence of interest rate, and reduced investment cost (of the SFE section only), on production cost with a processing period of 20 weeks and 20% own-capital input.

Figure 8.1-18. Savings on production costs in dependence on different interest rates for the case where the investment in the SFE section can be reduced (processing period 20 weeks, 20% own capital input).

Figure 8.1-19. Savings in production costs depending on different interest rates, where labour costs can be reduced (processing period, 20 weeks own capital input, 20%).

Annealing process periods 1 - Heating to slightly above annealing point. 

J.G. Locke, TATB Dry Animation Fine Particle Process. Period Covered July-September 1977 , MHSMP-77-53, Mason Hanger. . ., Amarillo, Contract No EY-76-C-04-0487 (1977)... 

Even basic tasks, such as testing for phosphonates, have not always proved to be that simple, as problems of nonreaction or interference during titration, etc. have marred the analytical process. Periodically, improvements in field analysis methods, such as phosphonate testing using UV lamp or microwave techniques, have improved matters. It is now becoming established practice in many parts of the world for the field testing of organic actives reserves to involve the use of a colorimeter (in addition to titration and drop-count methods, etc.), which has improved confidence levels. 

Where regular cleaning is necessary, and several air washer systems are in operation, it may prove useful for maintenance staff to have an extra set of components, already cleaned and disinfected, in order to speed up the process. Periodic, light-duty cleaning may often be accomplished over a 24-hour period, as it is not always necessary to provide such intensive a cleaning work. 

Reactive Chemicals reviews should be conducted on new processes, periodically on existing processes and facilities, on changes planned for existing processes and on changes in supervision. It is the owner s responsibility to arrange for these reviews with the local or Technology Center Reactive Chemicals Committee. The standardized Global RC/PHA protocol should be utilized for these reviews. Your Process Safety Services representative can help you obtain and use this protocol. (See B under How to Apply Reactive Chemicals)... 

Regarding monitoring patent applications of third parties, Brazilian legislation allows any interested party to submit documents and information during an application process period, to assist the technical examination. This is provided in Article 31 of the Industrial Property Law, and can be done up to the final examination. The tools for this are the Industrial... 

The water table is dynamic in most systems. It changes in response to rain events, flood events, snowmelt, recharge, and pumping. To decipher the interplay of these ongoing processes, periodic water table measurements are essential. Historical data are in many cases available from local water authorities, which conduct routine water table measurements. Measurement of the depth of the water table at the time of each sample collection is essential in order to couple the chemical and isotopic results with the hydrological data. 

Secondary Waste Processing Period ANCDF Average Best TOCDF Average Best JACADS Average Best Clean Harbors Aragonite0... 

Process period = length of time charging stock is passed through the catalyst bed between successive regenerations. 

Effect of pressure at 600°C block temperature and 30-min process period... 

The proposed process uses two parallel columns containing beds of solid particles. The air-acetone stream, which contains acetone and oxygen in stoichiometric proportion, enters one of the beds at 1500 mm Hg absolute at a rate of 1410 standard cubic meters per minute. The particles in the bed have been preheated and transfer heat to the gas. The mixture ignites when its temperature reaches 562°C, and combustion takes place rapidly and adiabatically. The combustion products then pass through and heal the particles in the second bed. cooling down to 350°C in the process. Periodically the flow is switched so that the heated outlet bed becomes the feed gas preheater/combustion reactor and vice versa. 

Conversion Temperature Pressure Space Velocity Catalyst Residence Time (or Process Period)... 

Catalyst residence time or process period). Catalyst residence time in a moving-bed or fluid unit, or process period in a fixed-bed unit, is the length of time a catalyst particle is used to crack oil in each cycle before it is regenerated. Catalyst residence time is equal to the ratio of the amount of catalyst in the reactor to the catalyst-circulation rate. In moving-bed units, it is essentially the same for all catalyst particles, whereas in fluid units there is a variation, as already discussed. 

Catalyst/oil ratio. Catalyst/oil ratio is the ratio of catalyst-circulation rate to the oil-feed rate. In fixed-bed processes, it corresponds to the ratio of the amount of catalyst in the reactor to the amount of oil processed during a cycle and is numerically equal to the ratio of reciprocal space velocity to process-period length. 

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