Methods and apparatuses for isomerization of paraffins
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C07C-005/13
C10G-045/60
C10G-045/58
출원번호
US-0434703
(2012-03-29)
등록번호
US-9040765
(2015-05-26)
발명자
/ 주소
Rice, Lynn H.
출원인 / 주소
UOP LLC
인용정보
피인용 횟수 :
0인용 특허 :
13
초록▼
Embodiments of methods and apparatuses for isomerization of paraffins are provided. In one example, a method comprises the steps of separating an isomerization effluent into a product stream that comprises branched paraffins and a stabilizer vapor stream that comprises HCl, H2, and C6-hydrocarbons.
Embodiments of methods and apparatuses for isomerization of paraffins are provided. In one example, a method comprises the steps of separating an isomerization effluent into a product stream that comprises branched paraffins and a stabilizer vapor stream that comprises HCl, H2, and C6-hydrocarbons. C6-hydrocarbons are removed from the stabilizer overhead vapor stream to form a HCl and H2-rich stream. An isomerization catalyst is activated using at least a portion of the HCl and H2-rich stream to form a chloride-promoted isomerization catalyst. A paraffin feed stream is contacted with the chloride-promoted isomerization catalyst in the presence of hydrogen for isomerization of the paraffins.
대표청구항▼
1. A method for isomerization of paraffins, the method comprising the steps of: separating an isomerization effluent into a product stream that comprises branched and un-branched paraffins and a stabilizer vapor stream that comprises HCl, H2, and C6-hydrocarbons;separating the stabilizer vapor strea
1. A method for isomerization of paraffins, the method comprising the steps of: separating an isomerization effluent into a product stream that comprises branched and un-branched paraffins and a stabilizer vapor stream that comprises HCl, H2, and C6-hydrocarbons;separating the stabilizer vapor stream into a net gas vapor comprising HCl, H2, and C5-hydrocarbons and a liquid stream that comprises C2- and C3+ hydrocarbon;separating the net gas vapor into a C5-hydrocarbons-rich phase and a HCl and H2-rich stream in a chiller;activating an isomerization catalyst using at least a portion of the HCl and H2-rich stream to form a chloride-promoted isomerization catalyst, wherein at least the portion of the HCl and H2-rich stream is directly recycled from separation of the net gas vapor to activating the isomerization catalyst; andcontacting a paraffin feed stream with the chloride-promoted isomerization catalyst in the presence of hydrogen for isomerization of the paraffins. 2. The method of claim 1, wherein the step of separating the isomerization effluent comprises separating the isomerization effluent at a stabilizer temperature of from about 65 to about 165° C. 3. The method of claim 1, wherein the step of forming the net gas vapor comprises separating the stabilizer vapor stream and the C5-hydrocarbons-rich phase at a separation temperature of from about 30 to about 60° C. 4. The method of claim 3, wherein the step of forming the net gas vapor comprises separating the stabilizer vapor stream and the C5-hydrocarbons-rich phase at a pressure of from about 700 to about 2,100 kPa gauge. 5. The method of claim 1, further comprising the step of: dividing the HCl and H2-rich stream into a recycle portion and a treatment portion, wherein the step of activating comprises activating the isomerization catalyst using the recycle portion of the HCl and H2-rich stream. 6. The method of claim 5, further comprising the step of: neutralizing the treatment portion of the HCl and H2-rich stream with a caustic. 7. A method of claim 6, further comprising the step of: heating the treatment portion of the HCl and H2-rich stream to a temperature of from about 30 to about 70° C. prior to the step of neutralizing. 8. The method of claim 1, wherein the step of separating the net gas vapor comprises separating the net gas vapor at a separation temperature of from about −40 to about 5° C. 9. The method of claim 1, wherein the step of separating the net gas vapor comprises separating the net gas vapor at a separation pressure of from about 700 to about 2,100 kPa gauge. 10. The method of claim 1, further comprising the step of: separating at least a portion of the liquid stream into a C2-hydrocarbon-rich stream and a LPG stream that comprises C3 and C4 hydrocarbons. 11. The method of claim 10, wherein the step of separating the at least a portion of the liquid stream comprises separating the at least the portion of the liquid stream at a separation temperature of from about 65 to about 120° C. 12. The method of claim 10, wherein the step of separating the at least a portion of the liquid stream comprises separating the at least the portion of the liquid stream at a separation pressure of from about 1,000 to about 2,000 kPa gauge. 13. The method of claim 10, further comprising the step of: combining the C2-hydrocarbon-rich stream with the stabilizer vapor stream to form a combined stream, and wherein the step of forming the net gas vapor comprises separating the combined stream and the C5-hydrocarbons-rich phase into the net gas vapor and the liquid stream. 14. A method for isomerization of paraffins, the method comprising the steps of: activating an isomerization catalyst in a reactor operating at isomerization conditions to form a chloride-promoted isomerization catalyst, wherein the isomerization catalyst is activated with HCl generated from a chloride promoter stream and from a HCl and H2-rich recycle stream;contacting a paraffin feed stream comprising un-branched paraffins with the chloride-promoted isomerization catalyst in the reactor in the presence of hydrogen to form an isomerization effluent comprising branched paraffins, HCl, H2, and other C7-hydrocarbons;introducing the isomerization effluent to a stabilizer at stabilization conditions to form a product stream that comprises branched and un-branched paraffins and a stabilizer vapor stream that comprises HCl, H2, and C6-hydrocarbons;separating the stabilizer vapor stream in a separator at first separation conditions into a net gas vapor that comprises HCl, H2 and C5-hydrocarbons and a liquid stream that comprises C2- and C3+ hydrocarbons;separating the net gas vapor in a chiller at second separation conditions into a C5-hydrocarbons-rich phase and a HCl and H2-rich stream; anddirectly recycling at least a portion of the HCl and H2-rich stream back to the reactor as the HCl and H2-rich recycle stream. 15. The method of claim 14, further comprising the steps of: dividing the HCl and H2-rich stream into a recycle portion and a treatment portion, wherein the step of recycling comprises recycling the recycle portion of the HCl and H2-rich stream back to the reactor; andintroducing the treatment portion of the HCl and H2-rich stream to a scrubber to neutralize HCl with a caustic. 16. The method of claim 14, wherein the step of separating the net gas vapor comprises introducing the net gas vapor to the chiller for indirect heat exchange with a refrigerant. 17. The method of claim 16, wherein the step of introducing the net gas vapor comprises cooling the net gas vapor to a temperature of from about −40 to about 5° C. 18. The method of claim 14, further comprising the step of: separating at least a portion of the liquid stream in a LPG stripper at third separation conditions into a C2-hydrocarbon-rich stream and a LPG stream that comprises C3 and C4 hydrocarbons. 19. The method of claim 18, further comprising the step of: introducing the C2-hydrocarbon-rich stream to the stabilizer vapor stream upstream of the separator to form a combined stream, and wherein the step of forming the net gas vapor comprises separating the combined stream and the C5-hydrocarbons-rich phase in the separator into the net gas vapor and the liquid stream.
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이 특허에 인용된 특허 (13)
Cahn Robert P. (Millburn NJ) Siskin Michael (Maplewood NJ), Autorefrigerated isomerization process.
Breckenridge Lloyd L. (Philadelphia PA) Del Rossi Kenneth J. (Woodbury NJ) Huss ; Jr. Albin (Chadds Ford PA) Kennedy Clinton R. (West Chester PA) Kirker Garry W. (Washington Twp. ; Gloucester County , Combined paraffin isomerization/ring opening process.
Gibson Kirk R. (El Cerrito CA) Jacobson Robert L. (Hercules CA) Michlmayr Manfred J. (Orinda CA), Isomerization process for upgrading low-octane light paraffinic feeds using a chlorided platinum-alumina-rhenium catalys.
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