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Catalyst for producing acrylonitrile

A catalyst, acrylonitrile technology, used in heterogeneous catalyst chemical elements, physical/chemical process catalysts, bulk chemical production, etc., can solve problems such as low selectivity and poor stability

Active Publication Date: 2017-10-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] One of the technical problems to be solved by the present invention is the problem of low selectivity and poor stability of the catalyst for the preparation of acrylonitrile by the ammoxidation of propylene in the prior art. A catalyst for the preparation of acrylonitrile by the ammoxidation of propylene is provided. The catalyst has high selectivity, Good stability

Method used

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  • Catalyst for producing acrylonitrile
  • Catalyst for producing acrylonitrile
  • Catalyst for producing acrylonitrile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] 111.1 g Bi(NO 3 ) 3 ·5H 2 O, 124.8 g Mn(NO 3 ) 2 , 517.6 g Ni(NO 3 ) 2 ·6H 2 O, 287.6 g Fe(NO 3 ) 3 9H 2 O, 135.5 g Mg(NO 3 ) 2 ·6H 2 O, 3.6 grams of KOH, 60.7 grams of Pr(NO 3 ) 3 ·6H 2 O and 21.4 g Cr(NO 3 ) 3 9H 2 After O was heated and dissolved in 160 g of water, solution I was obtained. 2425 grams of silica sol with a concentration of 40%, 45 grams of water, 10 grams of aluminum oxide and 20 grams of zirconium oxide are mixed to form mixed solution II, wherein the weight concentration of the carrier in the mixed solution II is 40%, and the carrier contains 1wt% aluminum oxide and 2 wt% zirconia. 846.0 g (NH 4 ) 6 Mo 7 o 24 4H 2 O was dissolved in 890 g of water and added to mixed solution II to form mixed solution III. Solution I and mixed solution III were mixed and stirred at a pH of 5 and a temperature of 80° C. to obtain slurry I. The prepared slurry was formed into microspheres in a spray dryer, and finally calcined in a rotary calcin...

Embodiment 2

[0061] 111.1 g Bi(NO 3 ) 3 ·5H 2 O, 124.8 g Mn(NO 3 ) 2 , 517.6 g Ni(NO 3 ) 2 ·6H 2 O, 287.6 g Fe(NO 3 ) 3 9H 2 O, 135.5 g Mg(NO 3 ) 2 ·6H 2 O, 3.6 grams of KOH, 60.7 grams of Pr(NO 3 ) 3 ·6H 2 O and 21.4 g Cr(NO 3 ) 3 9H 2 After O was heated and dissolved in 160 g of water, solution I was obtained. Mix 2425 grams of silica sol with a concentration of 40%, 45 grams of water, 15 grams of alumina and 15 grams of zirconia to form a mixed solution II, wherein the weight concentration of the carrier in the mixed solution II is 40%, and the carrier contains 1.5wt% alumina and 1.5 wt% zirconia. 846.0 g (NH 4 ) 6 Mo 7 o 24 4H 2 O was dissolved in 890 g of water and added to mixed solution II to form mixed solution III. Solution I and mixed solution III were mixed and stirred at a pH of 5 and a temperature of 80° C. to obtain slurry I. The prepared slurry was formed into microspheres in a spray dryer, and finally calcined in a rotary calciner at 590° C. for 2.0...

Embodiment 3

[0063] 111.1 g Bi(NO 3 ) 3 ·5H 2 O, 124.8 g Mn(NO 3 ) 2 , 517.6 g Ni(NO 3 ) 2 ·6H 2 O, 287.6 g Fe(NO 3 ) 3 9H 2 O, 135.5 g Mg(NO 3 ) 2 ·6H 2 O, 3.6 grams of KOH, 60.7 grams of Pr(NO 3 ) 3 ·6H 2 O and 21.4 g Cr(NO 3 ) 3 9H 2 After O was heated and dissolved in 160 g of water, solution I was obtained. Mix 2425 grams of silica sol with a concentration of 40%, 45 grams of water, 7.5 grams of alumina and 22.5 grams of zirconia to form a mixed solution II, wherein the carrier weight concentration in the mixed solution II is 40%, and the carrier contains 0.75wt% alumina and 22.5 wt% zirconia. 846.0 g (NH 4 ) 6 Mo 7 o 24 4H 2 O was dissolved in 890 g of water and added to mixed solution II to form mixed solution III. Solution I and mixed solution III were mixed and stirred at a pH of 5 and a temperature of 80° C. to obtain slurry I. The prepared slurry was formed into microspheres in a spray dryer, and finally calcined in a rotary calciner at 590° C. for 2.0 h...

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Abstract

The invention relates to a catalyst for producing acrylonitrile and a preparation technology, and mainly solves the problems of low selectivity and poor stability of a catalyst for propylene ammoxidation reaction in the prior art. By adopting the scheme that the catalyst for producing the acrylonitrile is prepared from a carrier and an active ingredient which is as shown in the following general formula: AaBbCcNidFeeBifMo13.6Ox, wherein in the general formula, A is selected from at least one of K, Rb and Cs, B is selected from at least one of Ca, Mn, Co, Mg, Cr, W, P and Nb, C is selected from at least one of rare earth elements, the catalyst is prepared from silicon dioxide and a carrier modifier, and the carrier modifier is selected from at least one of aluminum oxide and zirconium oxide, the problems are well solved, and the catalyst can be used for industrial production of producing the acrylonitrile through the propylene ammoxidation.

Description

technical field [0001] This invention relates to catalysts for the production of acrylonitrile. Background technique [0002] At present, the industrial production of unsaturated nitriles by ammoxidation of olefins still generally adopts the fluidized bed ammoxidation process. Catalyst is one of the core technologies of this process, and its research and improvement have been paid attention to all the time. At present, there are two main types of catalysts for industrial propylene ammoxidation to acrylonitrile: Mo-Bi series and Sb series, among which Mo-Bi series catalysts are dominant, accounting for 95% of the olefin oxidation market. Previous research and exploration are also mainly concentrated in On Mo-Bi catalysts. By introducing metal components with variable valence states into the catalyst, such as Fe, Ce and other elements, the oxidation-reduction performance of the catalyst is improved, and the recovery of the effective state of the active component of the cataly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889C07C253/26C07C255/08
CPCB01J23/002B01J23/8898B01J2523/00C07C253/26B01J2523/13B01J2523/22B01J2523/31B01J2523/3718B01J2523/48B01J2523/54B01J2523/67B01J2523/68B01J2523/72B01J2523/842B01J2523/847C07C255/08Y02P20/52
Inventor 李静霞张顺海吴粮华
Owner CHINA PETROLEUM & CHEM CORP