Flow diagram fractions

A flow diagram of the solvent-refined coal or SRC process is shown ia Figure 12. Coal is pulverized and mixed with a solvent to form a slurry containing 25—35 wt % coal. The slurry is pressurized to ca 7 MPa (1000 psig), mixed with hydrogen, and heated to ca 425°C. The solution reactions are completed ia ca 20 min and the reaction product flashed to separate gases. The Hquid is filtered to remove the mineral residue (ash and undissolved coal) and fractionated to recover the solvent, which is recycled. 

A simplified flow diagram of a modern H2SO4 alkylation unit is shown in Eigure 1. Excess isobutane is suppHed as recycle to the reactor section to suppress polymerization and other undesirable side reactions. The isobutane is suppHed both by fractionation and by the return of flashed reactor effluent from the refrigeration cycle. 

Figure 9-4. Simplified flow diagram of a fractionation plant.

Figure 3-3. Flow diagram of a delayed coking unit (1) coker fractionator, (2) coker heater, (3) coke drum, (4) vapor recovery column.

Figure 3-8. Flow diagram of a Cheveron hydocracking unit (1,4) reactors, (2,5) HP separators, (3) recycle scrubber (optional), (6) LP separator, (7) fractionator.

Figure 3-9. Flow diagram of an Exxon hydrotreating uniF (1) filter, (2) guard vessel to protect reactor, (3) main reactor, (4) gas treatment, (5) fractionator.

Figure 10-5. A flow diagram of the UOP cumene process " (1) reactor, (2,3) two-stage flash system, (4) depropanizer, (5) benzene column, (6) clay treatment, (7) fractionator, (8) transalkylation section.

Figure 1. Flow diagram of the isolation of fraction from seeds of C. speciosa...

Extraction Procedure B. Figure 1 gives a flow diagram for this fractionation procedure, which was based on a modification of the simplified methods described by Serve et al. (20) and Hartley and Buchan (21). Two grams of ground dried sunflower leaves were added... 

Using the data given below, draw an information flow diagram of the process and calculate the process stream flow-rates and compositions for the production of 600 t/d ammonia. Use either the Nagiev split fraction method, with any suitable spreadsheet or manual calculations. 

Figure 1. Flow diagram for solvent fractionation of coal hydrogenation product...

Fig. 8. Flow diagram of the extraction of PHA from oilseeds using air classification or centrifugal fractionation...

A flow diagram indicating notation is shown in Figure 21.11 for a three-stage FBCR in which the reaction A products takes place. The feed enters at T0 and m kg s-1, or, in terms of A, at Fao and fAo = 0. The feed is split at S so that a fraction r enters stage 1 alter passing tough the preheater El, where the temperature is raised from Ta to Tol. A subsequent split occurs at S2 so that a feed fraction r2 mixes with the effluent... 

Figure 5.2 Flow diagram of purification of hydrogenase from D. fructosovorans. At each stage of fractionation, the enzyme activity and protein concentration are measured for each fraction.The fractions with the greatest specific activity (S.A., units/milligram protein) are taken onto the next stage.

The industrial production of m-xylene is very similar to that of p-xylene. In fact, most of the production of m-xylene is done in facilities where a much larger quantity of p-xylene is produced. Figure 7.5 is a typical flow diagram for an aromatics complex where m-xylene is produced. It is quite like the flow diagram for the production of p-xylene except that a fraction of the Parex unit raffinate, containing typically over 60% m-xylene, is used as fresh feed to the MX Sorbex unit for m-xylene extraction. Because the required m-xylene production is typically much lower than that of p-xylene and the MX Sorbex fresh feed stream is three times more concentrated than the Parex unit fresh feed stream, the feed stream to the... 

A typical commercial C8A process flow diagram is shown in Figure 14.11. The C8A isomerization reactor is usually combined with a recovery unit for one or more xylene isomers. PX recovery by adsorption or crystallization is the most common. For the sake of this discussion, PX recovery is assumed, although MX recovery by adsorption is possible, as are OX or EB recovery by fractionation. 

Figure S.ll shows the flow diagram of the microprocessor-controlled preconcentration equipment, which is configured here for off-line operation, and consists of a sample changer, three separate peristaltic pumps (PI, P2 and P3) for the sample solution, buffer and add, three magnetic valves (VI, V2 and V3), the preconcentration column filled with chelating ion-exchange material (7 mm i.d., 10—30 mm height) and a fractionating unit for the addic column eluate. The flow-rates for the sample solution, buffer and add are adjusted to S ml/min.

The simultaneous solution of eqns. (72) and (79) when h is not zero is generally achieved by a numerical method which considers small increments in reactor volume and then iterates the calculation of the resulting temperature and fractional conversion in a manner similar to that described for Sect. 2.5.3 for a batch reactor. Cooper and Jeffreys [3] give an illustrative example, together with a computer flow diagram, for calculating the reactor volume. 

Method 625 for Semivolatiles. This method is a solvent extraction method intended to determine as many of the organic semivolatile priority pollutants as possible. To accomplish this, the sample is serially extracted, first at a pH greater than 11 and then at pH 2. Figure 1 shows a flow diagram of the procedure. The two fractions, base-neutrals and acids, are independently determined by using two separate GC columns. The base-neutrals are determined on a 1.8-m X 2-mm i.d. glass column packed with Supelcoport (100-120 mesh) coated with 3%... 

Table IV. Temperature, Pressure, Flow Rate, and Mole Fraction of Different Numbered Streams in the Flow Diagram...

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