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Heteropolyacid modified alumina ethanol dehydration catalyst and preparation method thereof

A technology of ethanol dehydration and heteropolyacid, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalyst, metal/metal oxide/metal hydroxide catalyst, etc., which can solve the problem of high cost of ethanol dehydration catalyst and low ethylene yield etc. to achieve low cost, improve ethylene selectivity, and inhibit ethylene polymerization

Active Publication Date: 2011-01-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] One of the technical problems to be solved by the present invention is that the cost of ethanol dehydration catalyst is high and the yield of ethylene is low in the prior art, and a new heteropolyacid modified alumina ethanol dehydration catalyst is provided

Method used

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  • Heteropolyacid modified alumina ethanol dehydration catalyst and preparation method thereof
  • Heteropolyacid modified alumina ethanol dehydration catalyst and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] H 3 Mo 12 o 4 0P·nH 2 O is mixed with boehmite, Tianqing powder, and 0.3 mol / liter nitric acid, and the weight ratio of each raw material is H 3 Mo 12 o 4 0P / Al 2 o 3 / Tian Qing powder = 0.13: 1: 0.1, shaped into a four-leaf clover shape, 4 mm long, 1.1 mm in diameter of the four-leaf circle, dried at 120° C. for 12 hours, and roasted at 550° C. for 10 hours. Al in the catalyst 2 o 3 The parts by weight of is 88 parts, and the parts by weight of heteropolyacid is 12 parts.

Embodiment 2

[0023] Press each step and condition of [embodiment 1], only H 4 o 40 SiW 12 / Al 2 o 3 / Tianqing powder=0.20:1:0.1, the shape is clover-shaped, 5 mm long, and the diameter of the three-leaf circle is 1 mm. Al in the catalyst 2 o 3 The parts by weight of is 83 parts, and the parts by weight of heteropolyacid is 17 parts.

Embodiment 3

[0025] Press each step and condition of [embodiment 1], only H 3 o 4 0PW 12 / Al 2 o 3 / Tianqing powder = 0.20:1:0.1, spherical in shape with a diameter of 3 mm. Al in the catalyst2 o 3 The parts by weight of is 83 parts, and the parts by weight of heteropolyacid is 17 parts.

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Abstract

The invention relates to a heteropolyacid modified alumina ethanol dehydration catalyst and a preparation method thereof, which mainly solves the problems of high cost of the ethanol dehydration catalyst and low ethylene yield existing in the prior art. The catalyst comprises the following components in part by weight: a) 0.5 to 30 parts of heteropolyacid and b) 70 to 99.5 parts of alumina, wherein the heteropolyacid is at least one selected from HxAB12O40.nH2O or (NH4)mHpAB12O40.nH2O having a keggin structure. The technical scheme solves the problems well and can be used in the industrial production of the preparation of ethylene by ethanol dehydration.

Description

technical field [0001] The invention relates to a heteropolyacid modified alumina ethanol dehydration catalyst and a preparation method thereof. Background technique [0002] As a basic organic chemical raw material and a leading product in the petrochemical industry, ethylene is known as the "mother of petrochemical industry". It is mainly used in the production of polyethylene, ethylene oxide / ethylene glycol, dichloroethane, styrene, acetic acid Chemicals such as ethylene. With the rapid development of ethylene derivative industries such as chemical industry, energy and materials, the demand for ethylene is increasing. At present, ethylene mainly comes from naphtha cracking. As petroleum resources are non-renewable and are gradually becoming exhausted, the use of renewable biomass resources to develop bioenergy and biochemical industries has become an inevitable trend of current and future economic development. Ethanol can be obtained by fermentation of plant starch or ...

Claims

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Application Information

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IPC IPC(8): B01J27/19B01J27/188B01J23/30B01J21/06B01J21/04B01J37/04B01J37/08C07C11/04C07C1/24
CPCY02P20/52
Inventor 李亚男徐菁金照生周海春金萍孙兰萍黄祖娟
Owner CHINA PETROLEUM & CHEM CORP
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