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C4 mixture hydrating process of preparing butyl alcohol

A technology for preparing butanol and C4 fractions by hydration, which is applied in hydroxyl addition preparation, chemical recovery, organic chemistry and other directions, can solve problems such as reducing catalyst cost, and achieve good catalytic activity and selectivity.

Inactive Publication Date: 2004-06-23
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problem of this process is the separation of material and catalyst and the problem of reducing catalyst cost, and what participate in the reaction is only the isobutene in the mixed C4 fraction, the linear olefins with very high content (such as butene-1, cis-butene-2, trans-butene-2) did not participate in the reaction

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Mixed C4 (isobutane 36.3%, n-butane 9.1%, 1-butene 12.6%, trans-2-butene 14.6%, isobutene 17.0%, cis-2-butene 10.4%) feed rate 6g / h , feed rate of deionized water is 20g / h, reaction temperature is 110°C, HZSM-5 (Si / Al=60) is the catalyst, loading capacity is 3ml (40-60 mesh), and reaction pressure is 5.0MPa. The conversion rate of isobutene is 52.8%, the conversion rate of linear butene is 25.3%, and the selectivity of forming alcohol is 100%.

Embodiment 2

[0021] Catalyst is Ni 2+ / HZSM-5 (Ni / Al=3, mol ratio), all the other conditions are the same as in Example 1. The conversion rate of isobutene is 64.3%, the conversion rate of linear butene is 31.1%, and the selectivity of forming alcohol is 100%.

Embodiment 3

[0023] The catalyst for the hydration reaction is La 2 o 3 / HZSM-5(La 2 o 3 Weight content 2%), all the other conditions are identical with embodiment 1. The conversion rate of isobutene is 71.9%, the conversion rate of linear butene is 35.8%, and the selectivity of forming alcohol is 100%.

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Abstract

The present invention is the process of hydrating C4 fraction in the presence of catalyst with molecular sieve or modified molecular sieve as active component. The reaction is high pressure liquid phase fixed bed process; the material is C4 fraction produced in the petroleum processing process, MTBE processed mixed C4 fraction or some single C4 olefin; and the catalyst has acid molecular sieve or metal salt or oxide modified molecular sieve as active component. The solid acid catalyst with molecular sieve as active component has better catalytic activity and selectivity to the hydration of C4 olefin in corresponding conditions, the material needs no concentration and the catalyst may be regenerated.

Description

technical field [0001] The invention relates to a method for preparing butanol by hydration under the action of a molecular sieve catalyst starting from mixed C4 fractions. Background technique [0002] C4 fraction is a by-product of petroleum processing, and there are many methods for its deep processing and utilization. One of the deep processing methods is to convert the olefin components into alcohols through hydration. The catalyst used for hydration was liquid acid the earliest, such as using 40-50wt% sulfuric acid aqueous solution as catalyst in JP23524 / 72, and iron sulfate or antimony chloride aqueous solution can also be used as catalyst (JP7125 / 74). The use of inorganic acid solution as a catalyst has many disadvantages. When the acid concentration is reduced to reduce the corrosion of equipment, the reaction activity is also reduced; when high concentration acid is used, not only the equipment is severely corroded, but also side reactions such as olefin polymeriza...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C29/04C07C31/12
CPCY02P20/584
Inventor 王华黄韬陈刚刘中民
Owner PETROCHINA CO LTD
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