Mitsubishi Chemical Corporation

Other

Hiroki Emoto

Akio Ueda

Kazuhiro Yamamoto

Takashi Monoi

Yuichi Fujita

Kazuyuki Yokoyama

Atsuhiro Adachi

Satoshi Toda

Kei Yoshizuru

An object of the present invention is to provide a method for efficiently producing an &#x3b1;-olefin low polymer at a high &#x3b1;-olefin low polymer selectivity and a high &#x3b1;-olefin low polymer yield with suppressing the deterioration of catalytic activity with time, and the invention relates to a method for producing an &#x3b1;-olefin low polymer, which comprises performing a low polymerization reaction of an &#x3b1;-olefin in the presence of a catalyst containing a chlorine atom-containing compound (d) and a reaction solvent, wherein the chlorine atom-containing compound (d) that are at least two compounds having specific chlorine atom elimination rate is supplied in predetermined ratio.

Method for producing alpha-olefin low polymer

The present invention relates to a method and an apparatus for producing an &#x3b1;-olefin low polymer by subjecting an &#x3b1;-olefin to low polymerization reaction in the presence of a catalyst in a liquid phase part within a reactor, and the present invention relates to a method and an apparatus for producing an &#x3b1;-olefin low polymer, such as 1-hexene, etc., by subjecting an &#x3b1;-olefin, such as ethylene, etc., to low polymerization reaction, in which the formation of a polymer on an upper tube plate surface of a shell and tube type heat exchanger that is used for heat removal is suppressed, thereby performing a continuous operation stably over a long period of time.

Production method of alpha-olefin low polymer and production apparatus

An object of the present invention is to provide a method for suppressing the precipitation of polymers with a high concentration dissolved in a solvent in the operation termination step and suppressing the blockage of the apparatus by the polymers even when the polymers with a high concentration are precipitated, and the invention relates to a method for producing an &#x3b1;-olefin low polymer comprising a production operation step and an operation termination step, wherein the supply position of a supply liquid to a distillation column in the operation termination step is changed to a position lower than the supply position of a supply liquid to the distillation column in the production operation step.

The present invention relates to a method for producing an &#x3b1;-olefin low polymer through low polymerization reaction of an &#x3b1;-olefin in the presence of a catalyst containing a transition metal-containing compound, an aluminum-containing compound and a hydrocarbon having 2 or more carbon atoms and substituted with a halogen atom, and a solvent, which comprises a reaction step, a purification step and a circulation step of circulating the unreacted raw material &#x3b1;-olefin and the solvent from the purification step to the reaction step; and in which the amount of the olefin having 2 or more carbon atoms and substituted with a halogen atom that is supplied from the circulation step to the reaction step is within a range of from 0.1 to less than 200 (molar ratio) relative to the amount of the transition metal in the reaction step.

The present invention relates to a production method of an &#x3b1;-olefin oligomer for producing an &#x3b1;-olefin by performing an oligomerization reaction of an &#x3b1;-olefin in a reaction solvent in the presence of a catalyst in a reactor, which is a production method of an &#x3b1;-olefin oligomer, comprising circulating and feeding, to the reactor, a condensate liquid obtained by introducing part of gas of the gas phase part inside the reactor into a heat exchanger and cooling the gas, wherein the condensate liquid circulated and fed to the reactor is dispersed in the gas phase part inside the reactor; and a production apparatus of an &#x3b1;-olefin oligomer.

Production method and production apparatus of &#x3b1;-olefin oligomer

A method of producing an &#x3b1;-olefin low polymer, wherein an &#x3b1;-olefin is subjected to low polymerization in a solvent in the presence of a chromium catalyst and at least one inert gas. The proportion of the inert gas is maintained from 0.010 to 50.00% by volume in a gas phase part of a reactor, such that inert gas is discharged from the reactor and/or circulation piping when the proportion exceeds 50.00%. The chromium catalyst contains a chromium compound, at least one nitrogen-containing compound, an aluminum-containing compound, and optionally a halogen-containing compound. Unreacted &#x3b1;-olefin and solvent separated from a reaction liquid are circulated back into the reactor.

Production method of &#x3b1;-olefin low polymer

The object of the present invention is to provide a production method for a polyolefin, in which catalyst activity is improved, and a polyolefin such as a linear low density polyethylene can advantageously be industrially produced. The present invention relates to a production method for a polyolefin, in which in producing a polyolefin by the polymerization reaction of an olefin using a catalyst, an organohalide is present in the reaction system in an amount of from 0.05 to 10 ppm by weight in terms of the halogen atom as a concentration in a raw material olefin, and 1-hexene for linear low density polyethylene production raw material, containing an organohalide in an amount of from 0.05 to 10 ppm by weight in terms of the halogen atom.

Production method of polyolefin, polyolefin and 1-hexene for linear low density polyethylene production raw material

A process for producing alcohols, which comprises subjecting a mixture comprising an aldehyde having from 2 to 5 carbon atoms and a polycondensate of the aldehyde at a weight ratio of from 95:5 to 5:95 to a mixing hydrogenation reaction in the presence of a catalyst to produce alcohols corresponding to the aldehydes at the same time wherein substantially no by-product is produced.

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Auburn Hills, MI, United States of America

Hiroki Emoto