摘要:
One exemplary embodiment can be a process for producing a reformate by combining a stream having an effective amount of n-butane and a stream having an effective amount of naphtha for reforming. Generally, the naphtha has not less than about 95%, by weight, of one or more compounds having a boiling point of about 38—about 260° C. as determined by ASTM D86-07. The process can include introducing the combined stream to a reforming reaction zone. Typically, the combined stream has an n-butane:naphtha mass ratio of about 0.10:1.00—about 1.00:1.00.
摘要:
Disclosed is a process for integrating a butene dimerization process with a metathesis process to remove isobutene from the feed stream to the metathesis reactor. The isobutene is preferentially dimerized in the dimerization process to leave n-butenes for metathesis with ethylene. An upstream selective hydrogenation process also isomerizes 1-butenes to 2-butenes which is the preferred butene reagent in the metathesis process. A common fractionator column for the dimerization and hydrogenation processes is also described.
摘要:
A catalytic distillation process for producing high purity ethyl tertiary butyl ether that contains less than 0.6 weight percent ethanol, and preferably less than 0.07 weight percent ethanol, has been developed. The high purity ethyl tertiary butyl ether is withdrawn directly from a catalytic distillation column; no downstream processing is necessary to remove excess ethanol from the ether product. A stream containing largely normal butane is generated by a C.sub.4 distillation column along with a stream containing isobutane. The stream containing isobutane is dehydrogenated to form a stream containing isobutylene. Ethanol, the stream containing isobutylene, and the stream containing largely normal butane are introduced to an etherification zone containing a catalytic distillation column. The catalytic distillation column is operated under conditions which result in the reaction of the ethanol with the isobutylene to form ethyl tertiary butyl ether. Excess ethanol forms an azeotrope with the normal butane and is distilled with other hydrocarbons into an overhead stream. The ethyl tertiary butyl ether and no more than 0.6 weight percent ethanol are distilled into a bottoms stream and withdrawn directly from the catalytic distillation column.
摘要:
Disclosed is a process for integrating a butene dimerization process with a metathesis process to remove isobutene from the feed stream to the metathesis reactor. The isobutene is preferentially dimerized in the dimerization process to leave n-butenes for metathesis with ethylene. An upstream selective hydrogenation process also isomerizes 1-butenes to 2-butenes which is the preferred butene reagent in the metathesis process. A common fractionator column for the dimerization and hydrogenation processes is also described.
摘要:
A low pressure catalytic distillation process for producing high purity ethyl tertiary butyl ether that contains less than 0.6 weight percent ethanol, and preferably less than 0.07 weight percent ethanol, has been developed. The high purity ethyl tertiary butyl ether is withdrawn directly from a catalytic distillation column. No downstream processing is necessary to remove excess ethanol from the ether product. A stream containing a significant amount of one or more inert azeotropic agents such as normal butane, isopentane, and isobutane is introduced along with the isobutylene and ethanol reactants into an etherification zone containing a catalytic distillation column. The catalytic distillation column is operated under low pressure conditions which result in the reaction of the ethanol with the isobutylene to form ethyl tertiary butyl ether. The inert azeotropic agent must be present at the inlet to the catalytic distillation column in an amount sufficient to azeotrope excess ethanol and cause the excess ethanol to distill into an overhead stream under the conditions of operation. The preferred azeotropic agent is isopentane. Excess ethanol forms an azeotrope with the azeotropic agent and is distilled with other hydrocarbons into an overhead stream. The ethyl tertiary butyl ether and no more than 0.6 weight percent ethanol are distilled into a bottoms stream and withdrawn directly from the catalytic distillation column.
摘要:
Disclosed is a process for integrating a butene dimerization process with a metathesis process to remove isobutene from the feed stream to the metathesis reactor. The isobutene is preferentially dimerized in the dimerization process to leave n-butenes for metathesis with ethylene. An upstream selective hydrogenation process also isomerizes 1-butenes to 2-butenes which is the preferred butene reagent in the metathesis process. A common fractionator column for the dimerization and hydrogenation processes is also described.
摘要:
One exemplary embodiment can be a process for producing a reformate by combining a stream having an effective amount of isopentane and a stream having an effective amount of naphtha for reforming. Generally, the naphtha has not less than about 95%, by weight, of one or more compounds having a boiling point of about 38-about 260° C. as determined by ASTM D86-07. The process may include introducing the combined stream to a reforming reaction zone. The combined stream can have an isopentane:naphtha mass ratio of about 0.10:1.00-about 1.00:1.00.
摘要:
One exemplary embodiment can be a process for desorbing an adsorbent bed. The process can include passing a desorbent stream through the adsorbent bed to remove at least one of a nitrile compound and an oxygenate compound. Generally, the desorbent stream after desorbing is combined with a feed stream for an alkylation zone after a selective hydrogenation zone.
摘要:
One exemplary embodiment can be a process for producing a reformate by combining a stream having an effective amount of isopentane and a stream having an effective amount of naphtha for reforming. Generally, the naphtha has not less than about 95%, by weight, of one or more compounds having a boiling point of about 38—about 260° C. as determined by ASTM D86-07. The process may include introducing the combined stream to a reforming reaction zone. The combined stream can have an isopentane:naphtha mass ratio of about 0.10:1.00—about 1.00:1.00.
摘要:
Disclosed is a process for integrating a butene dimerization process with a metathesis process to remove isobutene from the feed stream to the metathesis reactor. The isobutene is preferentially dimerized in the dimerization process to leave n-butenes for metathesis with ethylene. An upstream selective hydrogenation process also isomerizes 1-butenes to 2-butenes which is the preferred butene reagent in the metathesis process. A common fractionator column for the dimerization and hydrogenation processes is also described.