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Cu/Zr bimetal framework type high-silicon beta molecular sieve catalyst as well as preparation method and application thereof

A technology of β molecular sieve and catalyst, which is applied in the field of Cu/Zr bimetallic framework type high silicon β molecular sieve catalyst and its preparation, can solve the problems of low product selectivity, fast catalyst deactivation, and difficult separation, and achieve high product selectivity , extended catalyst life, simple composition of reactants

Active Publication Date: 2020-07-24
SHAANXI YANCHANG PETROLEUM GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to overcome the low product selectivity, fast catalyst deactivation and many by-products in the traditional ethanol one-step or two-step method for butadiene production , Difficult separation, long process and other disadvantages

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A Cu / Zr bimetallic skeleton type high silicon beta molecular sieve catalyst comprises 100 parts by weight, 5 parts of cuprous oxide, 8 parts of zirconium oxide, and the rest is high silicon beta molecular sieve with Si / Al ratio of 100.

[0027] The preparation method of described catalyst: take raw material according to above-mentioned ratio:

[0028] (1) Grinding the high-silicon β molecular sieve with a Si / Al ratio of 100, the mesh number of the grinding is 80 mesh, and set aside;

[0029] (2) adding cuprous oxide and zirconium oxide to an aqueous solution of citrulline, adjusting the pH value of the solution with dilute hydrochloric acid to adjust the isoelectric point of citrulline to obtain a citrulline double metal complex solution;

[0030] (3) Add the high-silicon β molecular sieve with a Si / Al ratio of 100 after grinding in step (1) to the citrulline double metal complex solution in step (2), impregnate at room temperature for 24 hours, heat at 90°C, and purify...

Embodiment 2

[0033] A Cu / Zr bimetallic skeleton type high silicon beta molecular sieve catalyst comprises 100 parts by weight, 5 parts of cuprous oxide, 6 parts of zirconium oxide, and the rest is high silicon beta molecular sieve with Si / Al ratio of 100.

[0034] The preparation method of described catalyst is with embodiment 1;

[0035] The catalyst number is YCSY-02.

Embodiment 3

[0037] A Cu / Zr bimetallic framework type high silicon beta molecular sieve catalyst comprises 100 parts by weight, 5 parts of cuprous oxide, 2 parts of zirconium oxide, and the rest is high silicon beta molecular sieve with Si / Al ratio of 100.

[0038] The preparation method of described catalyst is with embodiment 1;

[0039] The catalyst number is YCSY-03.

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Abstract

The invention relates to a Cu / Zr bimetal framework type high-silicon beta molecular sieve catalyst as well as a preparation method and application thereof. Cheap coal-based ethanol is used as a raw material; through the effect of a Cu / Zr bimetal framework type high-silicon beta molecular sieve catalyst, under the conditions that the reaction temperature is 320-400 DEG C, the reaction pressure is 0.5-1MPa and the weight space velocity is 1-3h <-1 >, a relay catalytic reaction for preparing acetaldehyde through ethanol dehydrogenation and preparing butadiene from the ethanol and the acetaldehydeis carried out through a fixed bed reactor, so that the preparation of the butadiene from the ethanol is realized by a one-step method. The molar selectivity of the product butadiene is greater than95%, and the conversion rate of the ethanol is greater than 90%, and the problems of long process flow, low conversion rate, low selectivity and the like in the existing production process for preparing the butadiene from the ethanol and the acetaldehyde are solved.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to a Cu / Zr bimetallic framework type high-silicon beta molecular sieve catalyst and its preparation method and application. Background technique [0002] Butadiene is an important basic organic chemical product, a colorless gas with a special smell. Slightly soluble in water, soluble in ethanol, methanol, easily soluble in acetone, ether, chloroform, etc. It is a raw material for the manufacture of synthetic rubber, synthetic resin, nylon, etc. The main production methods are dehydrogenation of butane and butene, or separation from carbon four fractions. Anesthetic, particularly irritating to mucous membranes, easy to liquefy. [0003] Butadiene is the main raw material for the production of synthetic rubber (styrene-butadiene rubber, butadiene rubber, nitrile rubber, neoprene). With the development of styrene plastics, styrene and butadiene are used to copolymeriz...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/76C07C1/20C07C11/16C07C11/167
CPCB01J29/7615C07C1/20B01J2229/183C07C11/16C07C11/167
Inventor 杨东元扈广法孙育滨景旭亮张玉娟
Owner SHAANXI YANCHANG PETROLEUM GRP
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