Process for producing lower alcohol by direct hydration of low carbon olefin

A technology for low-carbon olefins and lower alcohols, which is used in the preparation of hydroxyl addition and other directions

Active Publication Date: 2005-09-21
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Simultaneously because the implementation of the present invention can reduce the generation of side reaction, reduce the hot spot

Method used

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  • Process for producing lower alcohol by direct hydration of low carbon olefin
  • Process for producing lower alcohol by direct hydration of low carbon olefin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] For a schematic diagram of the reaction process, see figure 1 , four Φ inner 25 × 800mm single-tube trickle-bed adiabatic reactors (1, 2, 3, 4). 100 milliliters of cation exchange resin catalysts (the trade mark is D008 commercial catalysts) are filled respectively in the four reactors. The feed propylene concentration is greater than 95.0m%, and the amount of feed propylene per hour is 66 grams; equally divided into four parts and enters four reactors; the reaction water is deionized water, and the feed deionized water per hour is 420 grams, from the first into the first reactor, and the reacted mixture directly enters the next reactor, and the molar ratio of the total feed water to feed propylene in the reaction process is 14.85. An online gas chromatograph (A, B, C, D) is installed at the outlet of each reactor, and the reaction mixture flowing out of each reactor is analyzed to obtain the yield of the product. The reaction conditions of each reactor are: pressure ...

Embodiment 2

[0028] The test is carried out under the same apparatus and reaction conditions as in Example 1. The feed amounts of fresh propylene per hour for the four reactors were 15, 18, 16.5, and 16.5 grams respectively. The test results are shown in Table 3.

[0029] the bed

Embodiment 3

[0031] The test is carried out under the same apparatus and reaction conditions as in Example 1. The feed amounts of fresh propylene per hour for the four reactors were 12, 15, 20, and 19 grams respectively. The test results are shown in Table 4.

[0032] the bed

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Abstract

The invention discloses a method for producing lower alcohol by lower carbon number hydrocarbons direct hydration, which comprises: in the action of solid catalysts (such as cationic catalysts, molecular sieve catalysts or phosphate bergmeal), catalyze hydration synthesizing the lower alcohol by lower carbon number hydrocarbons with 2-5 carbon atoms using segmented feeding with mole ratio between combined feed water to lower carbon number hydrocarbons as 0.1-30 in the temperature of 80-200 Deg. C and in the pressure of 2.0-20.0 MPa. The production is alcohol and a compound of alcohol and ether with 2-5 carbon atoms correspondingly, and separating the alcohol of production flow to get the final production.

Description

technical field [0001] The present invention relates to a method for continuously producing lower alcohols containing 2 to 5 carbon atoms. This method is to directly catalyze and hydrate low-carbon olefins containing 2 to 5 carbon atoms at a reaction temperature of 80-200 and a reaction pressure of 4.0-20.0 MPa under the action of a solid acid catalyst to obtain olefins containing 2 to 5 carbon atoms. lower alcohols. Background technique [0002] Under the action of solid acid catalyst, low-carbon olefins can generate corresponding low-carbon alcohols through the action of proton catalysis. Since low-carbon olefins are almost immiscible with water, the reaction is carried out under three-phase (solid catalyst phase, liquid phase water phase, and low-carbon olefin phase) conditions. The catalyst used in the reaction is a modified temperature-resistant strong acid ion exchange resin, and can also be a zeolite catalyst such as (-zeolite, ZSM-5, Y-zeolite, etc., the characteri...

Claims

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Application Information

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IPC IPC(8): C07C29/04
Inventor 刘中民朱书魁吕志辉许磊王华赵银峰李金哲张世刚
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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