Abstract:
파라핀의 제조방법에 관한 것으로, 선형 알파 올레핀 제조 공정의 부산물을 수소화(hydrogenation)하는 단계를 포함하는 파라핀의 제조방법을 제공할 수 있다. 본 발명의 파라핀의 제조방법에 따르면, 선형알파올레핀 제조공정의 부산물을 높은 전환율로 파라핀으로 전환할 수 있어, 부산물의 고부가화가 가능할 수 있다.
Abstract:
A method for recovering paraxylene from a mixture of aromatic hydrocarbons. The process uses a pressure swing adsorption zone followed by a paraxylene recovery zone. The invention provides for lower throughput through the paraxylene recovery zone, resulting in lower capital costs and operating costs.
Abstract:
Die vorliegende Erfindung betrifft ein Verfahren zur Trennung von C 4 - Kohlenwasserstoffen durch extraktive Destillation, bei dem die C 4 - Kohlenwasserstoffe einer zweistufigen Trennung, umfassend (i) eine Fraktionierung der C 4 -Kohlenwasserstoffe in eine Leichtfraktion und eine Schwerfraktion, und (ii) eine extraktive Destillation der Leichtfraktion und/oder der Schwerfraktion unterworfen werden. Das beschriebene Verfahren weist gegenüber den aus dem Stand der Technik bekannten Verfahren, insbesondere bei der Verwendung von Feed-Gemischen, die reich an n-Butan und 1-Buten/Isobuten sind, den Vorteil auf, dass verminderte Lösungsmittelumlaufraten realisiert werden können, was trotz des zusätzlichen Verfahrensschritts zu einem geringeren Energiebedarf des Verfahrens führt. Die vorliegende Erfindung betrifft weiterhin Anlagen zur Durchführung eines solchen Verfahrens sowie die Verwendung einer Trennungssequenz mit den Verfahrensschritten (i) und (ii) zur Trennung von C 4 -Kohlenwasserstoffen, insbesondere bei der Verwendung von Feed-Gemischen, die reich an n-Butan und 1-Buten/lsobuten sind.
Abstract:
Apparatuses and processes are provided for regulating C7 and C8 feed to an aromatics complex to increase the ratio of a selected xylene isomer to benzene ratio. Reformate may be split into three cuts in a splitter column. A side cut stream comprises predominantly C7 hydrocarbons and a bottoms steam from the splitter column comprises predominantly C8+ hydrocarbons. The relative proportion of the C7 and C8+ hydrocarbon streams sent to the aromatics complex are metered to determine the resulting ratio of a selected xylene isomer to benzene produced by the aromatics complex.
Abstract:
A process for oxidizing methyl-substituted biphenyl compounds comprises contacting a mixture comprising isomers of at least one methyl-substituted biphenyl compound with a source of oxygen, wherein the mixture comprises at least 20 wt% of isomer(s) having a methyl group at a 2-position or a 3-position on at least one benzene ring and at least 50 wt% of isomer(s) having a methyl group at a 4-position on at least one benzene ring, wherein said percentages are based on the total weight of the at least one methylbiphenyl compound in the mixture.
Abstract:
A method of producing hexene includes: passing a feed stream comprising C 1 to C 24 hydrocarbons through a distillation column, wherein a reflux ratio of the distillation column is greater than or equal to 1.33; distributing a light fraction comprising C 4 -C 6 hydrocarbons to a top portion of the distillation column; distributing a heavy fraction comprising C 8 -C 12 hydrocarbons to a bottom portion of the distillation column; and withdrawing a top product comprising hexene from the distillation column.
Abstract:
A process is present for increasing the yields of 1,3 butadiene. The process includes recovering 1,3 butadiene from a cracking unit that generates a crude C4 stream. The 1,3 butadiene is separated and the remaining C4 process stream components are further reacted and dehydrogenated to generate 1,3 butadiene in a subsequent process stream. The subsequent process stream is recycled to recover the additional 1,3 butadiene.
Abstract:
Methods of converting olefins include the steps of providing propane and isobutane to a dehydrogenation reactor to produce effluent that is sequentially cooled, compressed and passed to a distillation zone under conditions to fractionate propylene, isobutylene, butane and propane from the effluent. Propylene, isobutylene, butane and propane are separated in a distillation zone to produce a propylene concentrate stream, an isobutylene concentrate steam, a propane recycle stream, and a butane recycle. The propane and isobutane are recycled back into the feed stream. The propylene concentrate stream and the isobutylene concentrate stream are passed to an oligomerization reactor to produce an oligomer product mixture that includes the olefin conversion products. The oligomer product mixture is then passed to the distillation column where olefin conversion product is separated as oligomer product.
Abstract:
A process for regenerating an adsorbent for nitrogen-containing compounds present in a hydrocarbon feed comprising contacting the adsorbent with an inert gas at a temperature in the range of from 10 to 60°C, followed by contacting the adsorbent with an inert gas at an elevated temperature in the range of from 200 to 260°C and cooling the adsorbent in an inert gas.