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Method for preparing epoxybutane

A technology of butylene oxide and hydrogen peroxide, which is applied in organic chemistry and other fields, can solve the problems of low selectivity of butylene oxide and short service life of catalysts, etc.

Inactive Publication Date: 2015-01-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The technical problem to be solved by the present invention is that the prior art has the problems of low butylene oxide selectivity and short service life of the catalyst, and a new method for preparing butylene oxide is provided

Method used

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  • Method for preparing epoxybutane
  • Method for preparing epoxybutane

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Under the conditions of 100°C, 0.3 MPa, and the molar ratio of cumene to air at 1:5, cumene and air undergo oxidation reaction to obtain cumene hydroperoxide oxidation solution with a weight concentration of 20-24%.

[0037] Using Na 2 CO 3 Wash the cumene hydroperoxide oxidation solution with an aqueous solution with a weight content of 5%, wherein the volume ratio of the oxidation solution to the alkali solution is 4:1, and remove the organic acid therein. Then wash the oxidizing solution with deionized water to remove the residual Na due to alkaline washing + , wherein the volume ratio of oxidizing solution to deionized water is 4:1. According to the needs of the epoxidation reaction, vacuum enrichment is carried out to it, and the enrichment temperature is 80°C to obtain an oxidizing solution with a concentration of cumene hydroperoxide of 50% by weight. When enriching, the residual water due to washing is also to a certain extent above is removed. After process...

Embodiment 2

[0045] Under the conditions of 98°C, 0.3 MPa, and the molar ratio of cumene to air at 1:5, cumene and air undergo oxidation reaction to obtain a cumene hydroperoxide oxidation solution with a weight concentration of 20-24%.

[0046] Using Na 2 CO 3 Wash the cumene hydroperoxide oxidation solution with an aqueous solution with a weight content of 5%, wherein the volume ratio of the oxidation solution to the alkali solution is 4:1, and remove the organic acid therein. Then wash the oxidizing solution with deionized water to remove the residual Na due to alkaline washing + , wherein the volume ratio of oxidizing solution to deionized water is 4:1. According to the needs of the epoxidation reaction, vacuum enrichment is carried out to it, and the enrichment temperature is 80°C to obtain an oxidizing solution with a concentration of cumene hydroperoxide of 50% by weight. When enriching, the residual water due to washing is also to a certain extent above is removed. After proces...

Embodiment 3

[0054] Under the conditions of 90°C, 0.3 MPa, and the molar ratio of cumene to air at 1:5, cumene and air undergo oxidation reaction to obtain cumene hydroperoxide oxidation solution with a weight concentration of 20-24%.

[0055]Wash the cumene hydroperoxide oxidation solution with an aqueous solution with a weight content of 2% NaOH, wherein the volume ratio of the oxidation solution to the alkali solution is 4:1, and remove the organic acid therein. Then wash the oxidizing solution with deionized water to remove the residual Na due to alkaline washing + , wherein the volume ratio of oxidizing solution to deionized water is 4:1. According to the needs of the epoxidation reaction, vacuum concentration is carried out to it, the concentration temperature is 80°C, and the oxidation solution with a concentration of cumene hydroperoxide of 60% by weight is obtained, and the residual water due to washing with water is also to a certain extent when concentration is carried out. abo...

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Abstract

The invention relates to a method for preparing epoxybutane so as to mainly solve problems of low selectivity of epoxybutane and short service life of a catalyst in the prior art The method provided by the invention comprises the following steps: a) an oxidation reaction between isopropyl benzene and molecular oxygen is carried out to obtain a cumyl hydroperoxide oxidation liquid; b) content of organic acid in the cumyl hydroperoxide oxidation liquid is controlled to be not more than 0.3 wt%, content of alkali metal or alkaline earth metal ions is controlled to be not more than 0.1 wt%, and content of water is controlled to be not more than 0.5 wt%; c) the cumyl hydroperoxide oxidation liquid and butylene react under the liquid-phase condition in the presence of a catalyst so as to generate epoxybutane and alpha, alpha-dimethyl-benzyl carbinol; d) alpha, alpha-dimethyl-benzyl carbinol undergoes dehydration to generate alpha-methyl styrene; and e) alpha-methyl styrene undergoes hydrogenation to generate isopropyl benzene. By the technical scheme, the above problems are solved well. The method provided by the invention can be used in industrial production of preparing epoxybutane.

Description

technical field [0001] The invention relates to a method for preparing butylene oxide. Background technique [0002] Polyether polyol, referred to as polyether, is a new type of synthetic lubricant base oil researched and developed in the late 1970s and early 1980s. There are many types of them, mainly distinguished by monomers. The monomers for the synthesis of polyethers have been developed to include ethylene oxide, propylene oxide, butylene oxide and tetrahydrofuran. In addition to being used as the base oil of new synthetic lubricants, polyether is also an important raw material for the production of polyurethane, and has multiple functions such as defoaming, demulsification, dispersion, penetration, and emulsification. Due to the limitation of butylene oxide production technology, our common polyethers are mainly polyether polyols synthesized from ethylene oxide or propylene oxide as monomer raw materials, and polyether polyols synthesized from butylene oxide as monom...

Claims

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Application Information

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IPC IPC(8): C07D303/04C07D301/19
CPCC07D303/04C07D301/19
Inventor 金国杰高焕新康陈军杨洪云黄政丁琳
Owner CHINA PETROLEUM & CHEM CORP
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