Title:
PRODUCTION OF 2,3-DIMETHYL-2-BUTENE
Document Type and Number:
Japanese Patent JP3568293
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To extremely efficiently obtain 2,3-dimethyl-2-butene using a highly active catalyst obtained without carrying out a troublesome preparation step by using a heteropoly acid as a catalyst in isomerization of 2,3-dimethyl-1-butene.
SOLUTION: 2,3-Dimethyl-1-butene(DMB-1) is isomerized using a heteropoly acid (preferably Keggin type heteropoly acids having a composition of the formula H2SiW12O40). The heteropoly acid may be used by baking the acid at 70-120°C under reduced pressure or nitrogen gas. When the isomerization reaction is carried out by batch type, the reaction is preferably carried out at 20-150°C using the heteropoly acid in an amount of 1-5wt.% based on DMB-1. In the case of communication type, the reaction is carried out by making the heteropoly acid packed in a reactor communicate with DMB-1. In this case, the reaction temperature is preferably -10 to 150°C. The communication rate is usually 1-10h-1 as superficial liquid velocity.
Inventors:
Makoto Itagaki
Ando I Ching
Takeo Suzukamo
Ando I Ching
Takeo Suzukamo
Application Number:
JP26598795A
Publication Date:
September 22, 2004
Filing Date:
October 13, 1995
Export Citation:
Assignee:
Sumitomo Chemical Co., Ltd.
International Classes:
B01J23/30; B01J27/199; C07B61/00; C07C5/25; C07C11/107; (IPC1-7): C07C11/107; B01J23/30; B01J27/199; C07B61/00; C07C5/25
Domestic Patent References:
| JP63280031A | ||||
| JP52138499A |
Attorney, Agent or Firm:
Takashi Kuboyama
Toru Nakayama
Toru Nakayama
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