Contacting or mixing

The Bevrox Biotreatment technology consists of three phases the primary contact, or mixing phase the primary digestion phase and the polishing phase. The equipment is mobile and modular a project may require from 2 to 12 reactors. The technology does not treat metals. 

To understand cross polarization and its many variants, we need several new concepts. These concepts include spinlocking (one element of this double-resonance pulse sequence), rotating-frame relaxation times, spin temperature and Curie s law, and finally, establishing contact, or mixing, between spin systems by means of applied rf. 

The establishment of statistical equilibrium is not confined to translational energy. When two substances are in contact or mixed, whether they are gaseous, liquid, or solid, a state must be reached where the gains and losses of each kind of energy, translational, rotational, and vibrational, by the molecules of the two kinds balance. Such a condition corresponds to equality of temperature, and involves a quite definite relation between the different types of energy in the various kinds of molecule. 

Acid runawayfS excessive contaminants in feed to reactor/feed rate too fast/poor contact or mixing between isobutane, olefin and acid/fresh acid makeup feedrate stopped/faulty control/faulty meter/ratio of acid hydrocarbon outside range 45-60% v/v/ratio of isobutane olefin < 8 1/initial reactor temperature too hot or > 18 °C/poor mechanical design for fresh acid addition. 

Brookfield Spindle 1.60 rpm) 15 cps flash pt. none pH 5.3 7bx/co/ogy Eye and skin irritant hamiful if swallowed Precaution Avoid contact or mixing with materials containing chlorine Storage Store indoors in a closed container mod. temps. keep from freezing Ocenol 50/55+2EO [Cognis Canada]... 

Dicyclohexylarnine may be selectively generated by reductive alkylation of cyclohexylamine by cyclohexanone (15). Stated batch reaction conditions are specifically 0.05—2.0% Pd or Pt catalyst, which is reusable, pressures of 400—700 kPa (55—100 psi), and temperatures of 75—100°C to give complete reduction in 4 h. Continuous vapor-phase amination selective to dicyclohexylarnine is claimed for cyclohexanone (16) or mixed cyclohexanone plus cyclohexanol (17) feeds. Conditions are 5—15 s contact time of <1 1 ammonia ketone, - 3 1 hydrogen ketone at 260°C over nickel on kieselguhr. With mixed feed the preferred conditions over a mixed copper chromite plus nickel catalyst are 18-s contact time at 250 °C with ammonia alkyl = 0.6 1 and hydrogen alkyl = 1 1. 

Design criteria for carbon adsorption include type and concentration of contaminant, hydrauhc loading, bed depth, and contact time. Typical ranges are 1.4—6.8 L/s/m for hydrauhc loading, 1.5—9.1 m for bed depth, and 10—50 minutes for contact time (1). The adsorption capacity for a particular compound or mixed waste stream can be deterrnined as an adsorption isotherm and pilot tested. The adsorption isotherm relates the observed effluent concentration to the amount of material adsorbed per mass of carbon. 

The lapse rate in the PBL is imstable and vertical motion leads to the transport of significant amounts of energy upward, due to the buoyancy of air that has been in contact with the surface. A mixed layer forms up to a height where static stability of the air forms a barrier to thermally induced upward motion. This extreme occurs practically daily over the arid areas of the world and the barrier to upward mixing is often the tropopause itself. On the average in mid-latitudes, the imstable or mixed PBL is typically 1-2 km deep. 

Most studies of ORR catalysis by metalloporphyrins have been carried out using water-insoluble catalysts absorbed on a graphite electrode in contact with aqueous solution. In a limited number of cases, four other approaches have been used catalysts imbedded in an inert film (i.e., Nafion or lipid) on the electrode surface self-assembled monolayers of catalysts catalysts in aqueous or mixed organic/aqueous solutions in contact with an electrode and catalysis in mixed aqueous/organic medium using... 

Interpretation for irreducible water saturation assumes that the rock is water-wet or mixed-wet (water-wet during drainage but the pore surfaces contacted by oil becomes oil-wet upon imbibition). If a porous medium is water-wet and a nonwetting fluid displaces the water (drainage), then the non-wetting fluid will first occupy the larger pores and will enter the smaller pores only as the capillary pressure is increased. This process is similar to the accumulation of oil or gas in the pore space of a reservoir. Thus it is of interest to estimate the irreducible water saturation that is retained by capillarity after the hydrocarbon accumulates in an oil or gas reservoir. The FFI is an estimate of the amount of potential hydrocarbon in... 

Pytlewski, L. L Rep. AD-A028841, 13, Richmond (Va.), USNTIS, 1976 Contact of gaseous ammonia with the /V-chlorourea. either alone, or mixed with zinc oxide, leads to ignition. The same could happen in contact with cone, aqueous ammonia, solid ammonium carbonate or organic amines. 

Contact of powdered titanium with molten potassium chlorate, alkali-metal carbonates or mixed potassium carbonate/nitrate causes vivid incandescence. 

A second separation process reported by EBC is based on the use of hydrocyclones. Stable emulsions formed by good oil-cell-water contact and mixing can be separated continuously with hydrocyclones to obtain relatively clean oil and water. A method and an apparatus for separating a water/organic/solid emulsion, wherein the solid comprises particles having a length of about 50 xm or less, has been disclosed [267], This separation process scheme is shown in Fig. 14 and as before the separation method is envisioned as part of a BDS process. 

TPR of supported bimetallic catalysts often reveals whether the two metals are in contact or not. The TPR pattern of the 1 1 FeRh/SiOi catalyst in Fig. 2.4 shows that the bimetallic combination reduces largely in the same temperature range as the rhodium catalyst does, indicating that rhodium catalyzes the reduction of the less noble iron. This forms evidence that rhodium and iron are well mixed in the fresh catalyst. The reduction mechanism is as follows. As soon as rhodium becomes metallic it causes hydrogen to dissociate atomic hydrogen migrates to iron oxide in contact with metallic rhodium and reduces the oxide instantaneously. 

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