A system and process for purifying a 1,3-butadiene feedstock containing 1,3-butadiene and various impurities by first introducing the 1,3-butadiene feedstock stream to a separation column to produce an intermediate product stream containing 1,3-butadiene and residual impurities and then introducing
A system and process for purifying a 1,3-butadiene feedstock containing 1,3-butadiene and various impurities by first introducing the 1,3-butadiene feedstock stream to a separation column to produce an intermediate product stream containing 1,3-butadiene and residual impurities and then introducing the produced intermediate product stream through a condenser to a suitable dryer for removing residual impurities from the intermediate product stream and thereby forming a purified 1,3-butadiene stream. The separation column separates an overhead stream, containing 1,3-butadiene and impurities such as propadiene, water and oxygen, and a bottoms stream, containing impurities such as polymerization inhibitor, ethyl acetylene, 1,3-butadiene dimer, pentane and 1,2-butadiene, from the intermediate product stream which leaves the separation column in the form of a vapor side draw stream.
대표청구항▼
[ What is claimed is:] [1.] A purification process for purifying a 1,3-butadiene feedstock comprising 1,3-butadiene, water, a polymerization inhibitor, and at least one heavy impurity, comprising the steps of:separating said 1,3-butadiene feedstock, employing a separation column defining a separatio
[ What is claimed is:] [1.] A purification process for purifying a 1,3-butadiene feedstock comprising 1,3-butadiene, water, a polymerization inhibitor, and at least one heavy impurity, comprising the steps of:separating said 1,3-butadiene feedstock, employing a separation column defining a separation zone having an upper portion and a lower portion, into an overhead stream comprising water, a bottoms stream comprising at least one heavy impurity and a polymerization inhibitor, and a vapor side draw stream comprising 1,3-butadiene and residual impurities;reboiling at least a portion of said bottoms stream to form a boil-up vapor stream and a bottoms residue stream for return of said boil-up vapor stream to said lower portion;condensing at least a portion of said overhead stream to form a condensed overhead stream;forming a water phase and a hydrocarbon phase from said condensed overhead stream;refluxing said hydrocarbon phase to said separation zone;charging a slip stream of said bottoms residue stream into said overhead stream prior to condensing said at least a portion of said overhead stream;condensing said vapor side draw stream to form an intermediate product stream; andremoving at least a portion of said residual impurities from said intermediate product stream to form a purified 1,3-butadiene stream.
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이 특허에 인용된 특허 (2)
Kandori Hiroaki (Yokkaichi JPX) Siraga Ken (Yokkaichi JPX), Method for recovering 1,4-butanediol.
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