Production method and production apparatus of alpha-olefin oligomer

Patent metadata

Field	Value
Publication number	US-2017190637-A1
Application number	US-201715465118-A
Country	US
Kind code	A1
Filing date	Mar 21, 2017
Priority date	Sep 22, 2014
Publication date	Jul 6, 2017
Grant date	—

Abstract

The present invention relates to a production method of an α-olefin oligomer for producing an α-olefin by performing an oligomerization reaction of an α-olefin in a reaction solvent in the presence of a catalyst in a reactor, which is a production method of an α-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 α-olefin oligomer.

First claim

1 . A production method of an α-olefin oligomer for producing an α-olefin oligomer by performing an oligomerization reaction of an α-olefin in a reaction solvent in the presence of a catalyst in a reactor, which is a production method of an α-olefin oligomer, comprising
circulating and feeding, to said reactor, a condensate liquid obtained by introducing part of gas of the gas phase part inside said reactor into a heat exchanger and cooling the gas, wherein
said condensate liquid circulated and fed to said reactor is dispersed in the gas phase part inside said reactor.

2 . The production method of an α-olefin oligomer as claimed in claim 1 , wherein said heat exchanger is arranged outside of said reactor.

3 . The production method of an α-olefin oligomer as claimed in claim 1 , wherein said condensate liquid is dispersed as droplets.

4 . The production method of an α-olefin oligomer as claimed in claim 1 , wherein said condensate liquid is dispersed as droplets by means of an atomizer.

5 . The production method of an α-olefin oligomer as claimed in claim 4 , wherein the system of said atomizer is one or more systems selected from the group consisting of a centrifugal force system, a shear force system and a pressure system.

6 . The production method of an α-olefin oligomer as claimed in claim 1 , wherein the gas outlet temperature of the gas phase part of said reactor is lower by 8° C. or more than the liquid phase temperature of said reactor.

7 . The production method of an α-olefin oligomer as claimed in claim 1 , wherein the inlet temperature of said heat exchanger is lower by 8° C. or more than the liquid phase temperature of said reactor.

8 . The production method of an α-olefin oligomer as claimed in claim 1 , wherein an uncondensed gas obtained from said heat exchanger is circulated and fed to the liquid phase part of said reactor.

9 . The production method of an α-olefin oligomer as claimed in claim 1 , wherein said catalyst is composed of a combination of a chromium-containing compound, a nitrogen-containing compound (b), and an aluminum-containing compound (c).

10 . The production method of an α-olefin oligomer as claimed in claim 9 , wherein said catalyst further contains a halogen-containing compound (d).

11 . The production method of an α-olefin oligomer as claimed in claim 1 , wherein said α-olefin is ethylene.

12 . A production apparatus of an α-olefin oligomer for producing an α-olefin oligomer by performing an oligomerization reaction of an α-olefin, comprising a reactor fed with a catalyst, an α-olefin and a reaction solvent for performing an oligomerization reaction of the α-olefin, a heat exchanger for cooling gas withdrawn from the gas phase part inside said reactor to obtain a condensate liquid, a circulatory feed unit for circulating and feeding, to said reactor, the condensate liquid obtained in said heat exchanger, and a droplet dispersion unit for dispersing, in the gas phase part inside said reactor, at least either one of a condensate liquid from said circulatory feed unit and a reaction solvent from said circulatory feed unit.

13 . The production apparatus of an α-olefin oligomer as claimed in claim 12 , wherein said droplet dispersion unit is an atomizer provided in the gas phase part inside said reactor.

14 . A method for producing an α-olefin oligomer, comprising performing an oligomerization reaction of an α-olefin in a reaction solvent in the presence of a catalyst in a reactor to produce an α-olefin oligomer, wherein
at the time of introducing at least part of gas of the gas phase part inside said reactor into a heat exchanger outside of said reactor and cooling the gas, the outlet temperature of the gas phase part inside said reactor is lower by 8° C. or more than the temperature of the liquid phase of said reactor.

Assignees

• Mitsubishi Chem Corp

Inventors

• Emoto Hiroki

Classifications

• C07C2523/26

  Chromium · CPC title

• C07C2531/04

  containing carboxylic acids or their salts · CPC title

• C07C2531/22

  Organic complexes · CPC title

• C07C2/32 Primary

  as complexes, e.g. acetyl-acetonates {(complexes of salts of acids of halogen C07C2/20)} · CPC title

• C07C2531/14

  of aluminium or boron · CPC title