PPE 2(QUART 1) Flashcards
(10 cards)
________ is a C4 petrochemical used as raw material for synthetic rubbers such as styrene-butadiene rubber (SBR) primarily used for the production of automobile tires, for acrylonitrile-butadiene-styrene (ABS) used for appliances and automotive applications, and for styrene butadiene latex used for gloves, paper coatings and textiles.
Butadiene
is composed of various C4 hydrocarbons such as isobutylenes and butanes. Isobutylene is mainly used for producing rubbers, as well as feedstock for the production of methyl tert-butyl ether (MTBE) for gasoline blending.
Raffinate-1
BUTADIENE EXTRACTION PLANT
A typical butadiene extraction plant consists of four basic process sections:
extractive distillation, conventional distillation, solvent degassing, and
solvent regeneration.
BUTADIENE EXTRACTION PLANT
______is used separate components with similar volatilities._______is added to alter the relative volatility of components in a mixture.
Extractive distillation
A solvent (NMP)
BUTADIENE EXTRACTION PLANT
is sent to the extractive distillation section where it is vaporized and
separated using two extractive distillation columns.
C4 feed
BUTADIENE EXTRACTION PLANT
consists of a mixture of butenes and butanes and is designated as
raffinate-1.
first column
BUTADIENE EXTRACTION PLANT
is a dividing wall column consisting of a rectifier and an
afterwasher.
second column
BUTADIENE EXTRACTION PLANT
The overhead from the afterwasher is a ________ product
that is sent to the conventional distillation system for further purification.
crude butadiene
BUTADIENE EXTRACTION PLANT
is removed from the bottom of the second column and sent to the solvent degassing system
Rich solvent
BUTADIENE EXTRACTION PLANT
is removed as overhead from this
column and the bottoms is sent to the butadiene column.
Propyne
