[미국특허]
System and method for processing reactor polymerization effluent
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C08F-002/00
C08F-210/00
C08F-110/02
출원번호
US-0924298
(2013-06-21)
등록번호
US-8686097
(2014-04-01)
발명자
/ 주소
Mills, Andrew J.
Romig, Ralph W.
Loh, Ji Xian X.
출원인 / 주소
Chevron Phillips Chemical Company LP
대리인 / 주소
Conley Rose, P.C.
인용정보
피인용 횟수 :
0인용 특허 :
23
초록▼
A method of treating a polymerization reactor effluent stream comprising recovering the reactor effluent stream from the polymerization reactor, flashing the reactor effluent stream to form a flash gas stream, separating the flash gas stream into a first top stream, a first bottom stream, and a side
A method of treating a polymerization reactor effluent stream comprising recovering the reactor effluent stream from the polymerization reactor, flashing the reactor effluent stream to form a flash gas stream, separating the flash gas stream into a first top stream, a first bottom stream, and a side stream, wherein the side stream substantially comprises hexane, separating the first top stream into a second top stream and a second bottom stream, wherein the second bottom stream substantially comprises isobutane, and separating the second top stream into a third top stream and a third bottom stream; wherein the third top stream substantially comprises ethylene, and wherein the third bottom stream is substantially free of olefins.
대표청구항▼
1. A system for treating a polymerization reactor effluent stream from a polymerization reactor comprising: the polymerization reactor effluent stream, wherein the polymerization reactor effluent stream is fed from the polymerization reactor to a flash chamber;a polymer product stream, wherein the p
1. A system for treating a polymerization reactor effluent stream from a polymerization reactor comprising: the polymerization reactor effluent stream, wherein the polymerization reactor effluent stream is fed from the polymerization reactor to a flash chamber;a polymer product stream, wherein the polymer product stream is recovered from the flash chamber;a flash gas stream, wherein the flash gas stream is fed from the flash chamber to a first column;a first column overhead stream, wherein the first column overhead stream is fed from the first column to an accumulator; andan accumulator bottom stream, wherein the accumulator bottom stream is fed from the accumulator to the polymerization reactor, and wherein the accumulator bottom stream substantially comprises isobutane. 2. The system of claim 1, wherein the flash gas stream is separated by fractionation. 3. The system of claim 1, wherein the pressure of the flash gas stream in the flash chamber is substantially the same as the pressure of the flash gas stream within the first column. 4. The system of claim 1, wherein the first column overhead stream comprises at least about 90% C4 and lighter hydrocarbons. 5. The system of claim 1, wherein the accumulator bottom stream is separated from the first column overhead stream by accumulation. 6. The system of claim 1, wherein a portion of the accumulator bottom stream forms an isobutane recycle stream. 7. The system of claim 6, wherein the concentration of isobutane in the polymerization reactor is controlled, reactor is controlled, at least in part, by the isobutane recycle stream. 8. The system of claim 1, wherein the accumulator bottom stream comprises greater than about 95% isobutane and less than about 5% olefins. 9. The system of claim 8, wherein the olefins comprise ethylene, hexene, or combinations thereof. 10. A system for treating a polymerization reactor effluent stream from a polymerization reactor comprising: the polymerization reactor effluent stream, wherein the polymerization reactor effluent stream is fed from the polymerization reactor to a flash chamber;a flash chamber;a flash gas stream, wherein the flash gas stream is fed from the flash chamber to a first column;the first column;a first column overhead stream, wherein the first column overhead stream is fed from the first column to an accumulator;the accumulator; andan accumulator bottom stream, wherein the accumulator bottom stream is fed from the accumulator to the polymerization reactor, and wherein the accumulator bottom stream substantially comprises isobutane. 11. The system of claim 10, wherein the first column is configured to separate the flash gas stream by fractionation. 12. The system of claim 10, wherein the pressure of the flash gas stream in the flash chamber is substantially the same as the pressure of the flash gas stream within the first column. 13. The system of claim 10, wherein the first column overhead stream comprises at least about 90% C4 and lighter hydrocarbons. 14. The system of claim 10, wherein the first column is configured to separate the flash gas stream by fractionation. 15. The system of claim 10, wherein the accumulator is configured to separate the first column overhead stream by accumulation. 16. The system of claim 10, wherein a portion of the accumulator bottom stream forms an isobutane recycle stream. 17. The system of claim 16, wherein the concentration of isobutane in the polymerization reactor is controlled, at least in part, by the isobutane recycle stream. 18. The system of claim 10, wherein the accumulator bottom stream comprises greater than about 95% isobutane and less than about 5% olefins. 19. The system of claim 18, wherein the olefins comprise ethylene, hexene, or combinations thereof. 20. The system of claim 10, further comprising a reflux stream, wherein at least a portion of the reflux stream is fed from the accumulator to the first column.
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