Chemical Engineering Chapter 5 Process description for ethylbenzene process

Unlock access to all the studying documents.

View Full Document

5-1

Chapter 5

5.1 For ethylbenzene process in Figure B.2.1

5.2 For styrene process in Figure B.3.1

5.3 For drying oil process in Figure B.4.1

Feeds: acetylated castor oil

Products: acetic acid (by-product), drying oil, gum (waste stream)

5.4 For maleic anhydride process in Figure B.5.1

5.5 For ethylene oxide process in Figure B.6.1

5.6 For formalin process in Figure B.7.1

5.7 The main recycle streams for the styrene process in Figure B.3.1 are:

ethylbenzene recycle (Stream 29) , reflux streams to T-401 and T-402

5-2

5.9 The main recycle streams for the maleic anhydride process in Figure B.5.1 are:

5.10 Process description for ethylbenzene process in Figure B.2.1

Raw benzene (Stream 1), containing approximately 2% toluene, is supplied to the

Benzene Feed Drum, V-301, from storage. Raw benzene and recycled benzene mix in

the feed drum and then are pumped by the benzene feed pump, P-301A/B, to the feed

heater, H-301, where the benzene is vaporized and heated to 400 C. The vaporized

The cooled reactor effluent is then throttled down to a pressure of 110 kPa and sent to the

Liquid Vapor Separator, V-302, where the vapor product is taken off and sent to the fuel

gas header and the liquid stream is sent to column, T-301. The top product from T-301

consists of purified benzene that is recycled back to the benzene feed drum. The bottom

5-3

5.11 Process description of drying oil process in Figure B.4.1

Acetylated castor oil (ACO) is fed to the Recycle Mixing Vessel, V-501, where it is

mixed with recycled ACO. This mixture is then pumped via P-501A/B to the Feed Fired

Heater, H-501, where the temperature is raised to 380 C. The hot liquid stream, Stream

5.12 Process description for ethylene oxide process in Figure B.6.1

Ethylene oxide (EO) is formed via the highly exothermic catalytic oxidation of ethylene

using air. Feed air is compressed to a pressure of approximately 27 atm using a three

stage centrifugal compressor, C-701-3, with intercoolers, E-701 and E-702. The

compressed air stream is mixed with ethylene feed and the resulting stream, Stream 10, is