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Method for producing tertiary butyl alcohol

A manufacturing method and technology of tert-butanol, applied in the field of manufacturing tert-butanol, can solve the problems of low hydration reaction speed, low yield, low productivity and the like

Inactive Publication Date: 2006-09-20
MITSUBISHI RAYON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In the method of Patent Document 1, since the contact between the water phase and the oil phase composed of isobutylene-containing hydrocarbons and the cation exchange resin is insufficient, the speed of the hydration reaction is low, so there is a problem that a large amount of catalyst is required for industrial implementation.
In addition, in the method of Patent Document 2, since the hydration reaction is an equilibrium reaction, the conversion rate of isobutene is limited, so there is a problem of low productivity (low yield) when using a raw material with a low isobutene concentration.

Method used

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  • Method for producing tertiary butyl alcohol

Examples

Experimental program
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Effect test

Embodiment 1

[0037]The reactive distillation apparatus is composed of a reboiler section, a reaction section, and a condenser section in order from the bottom, and these sections are respectively connected by conduits. A 1L glass autoclave (trade name "Haipa-Glasta-TEM-V" manufactured by Pressure Glass Industry Co., Ltd.) equipped with a stirrer, a thermometer, a pressure gauge, and a heating heater was used for the reboiler section, A stainless steel tubular reactor with an inner diameter of 28 mm and a length of 240 mm was used for the reaction part, and a stainless steel sleeve condenser with an inner diameter of 28 mm and a length of 200 mm was used for the condenser.

[0038] As the cation exchange resin of the catalyst, a strongly acidic microporous ion exchange resin Rebachitto Kitrist K2621 manufactured by Bayer Co., Ltd. was used. The catalyst was used by filling the reaction part with a catalyst contained in an 80-mesh wire pouch (inner diameter: 8 mm, length: 40 mm).

[0039] A...

Embodiment 2

[0048] The procedure was carried out in the same manner as in Example 1 except that the Wako Pure Chemical Industries, Ltd. product name "dimethylsulfone" was 5.2 g and the amount of water was 17.8 g. The results are shown in Table 1.

Embodiment 3

[0050] The same procedure as in Example 1 was performed except that the Wako Pure Chemical Industries, Ltd. product name "acetic acid (acetic acid)" was 6.4 g and the amount of water was 13.3 g. The results are shown in Table 1.

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Abstract

Disclosed is a method for producing a tertiary butyl alcohol wherein the hydration rate of isobutylene is high. Also disclosed is a method for producing a tertiary butyl alcohol wherein a low-concentration isobutylene is used as a raw material and the hydration rate of isobutylene is high. In this method, a tertiary butyl alcohol is produced from isobutylene and water in the presence of an cation-exchange resin catalyst and at least one solvent selected from the group consisting of sulfones and organic carboxylic acids, using a reaction distillation apparatus. Preferably, at least one solvent selected from the group consisting of sulfolane, dimethyl sulfone and acetic acid is used as the solvent in this method.

Description

technical field [0001] The present invention relates to a process for the manufacture of tert-butanol. [0002] This application claims the priority of Japanese Patent Application No. 2003-297323 filed on August 21, 2003, the contents of which are incorporated herein by reference. Background technique [0003] Conventionally, there is known a method of producing t-butanol by hydration reaction of isobutylene and water using a cation exchange resin as a catalyst. For example, Patent Document 1 describes a method for producing t-butanol in a reactive distillation column. In addition, Patent Document 2 describes a method of producing t-butanol using sulfolane as a solvent for the reaction. [0004] Patent Document 1: Japanese Unexamined Patent Publication No. 3-106840 [0005] Patent Document 2: JP-A-8-53381 [0006] In the method of Patent Document 1, there is a problem that a large amount of catalyst is required for industrial implementation because the water phase is ins...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C31/12C07C29/04
CPCC12C11/02C07C29/04Y02P20/10C07C31/12
Inventor 小泉淳史小川朗
Owner MITSUBISHI RAYON CO LTD
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