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Catalyst for Ammoxidation to Acrylonitrile

A catalyst, acrylonitrile technology, used in the preparation of hydrocarbon ammoxidation, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of poor stability and low selectivity

Active Publication Date: 2020-01-03
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 Ammoxidation to Acrylonitrile
  • Catalyst for Ammoxidation to Acrylonitrile
  • Catalyst for Ammoxidation to 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. Mix 2425 grams of silica sol with a concentration of 40%, 45 grams of water, 10 grams of zirconia and 20 grams of diatomaceous earth to form a mixed solution II, wherein the carrier weight concentration in the mixed solution II is 40%, and the carrier contains 1 wt% zirconia and 2 wt% diatomaceous earth. 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...

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 zirconia and 15 grams of diatomaceous earth 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% oxidized Zirconium and 1.5 wt% diatomaceous earth. 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 ro...

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 zirconia and 22.5 grams of diatomaceous earth to form a mixed solution II, wherein the weight concentration of the carrier in the mixed solution II is 40%, and the carrier contains 0.75wt% oxidized Zirconium and 22.5 wt% diatomaceous earth. 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...

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Abstract

The invention relates to a catalyst for preparing acrylonitrile through ammonia oxidation, and a preparation process thereof. The catalyst mainly solves the problems of low selectivity and poor stability of a catalyst used for propylene ammonia oxidation reaction in the prior art. The catalyst has the scheme that the catalyst for preparing acrylonitrile through ammonia oxidation comprises a carrier and active ingredients expressed by the following general formula: AaBbCcFedBieMo<13.6>Ox, in the formula, the A is selected from at least one kind of materials from K, Rb and Cs; the B is selected from at least one kind of materials from Ca, Mn, Co, Ni, Mg, Cr, W, P and Nb; the C is selected from at least one kind of materials from rare earth elements; the carrier comprises silicon dioxide and carrier modifiers; the carrier modifiers are selected from at least one kind of materials from zirconium dioxide and diatomite. The problems are better solved, and the catalyst can be used for industrial production of producing acrylonitrile through propylene ammonia oxidation.

Description

technical field [0001] The invention relates to a catalyst for producing acrylonitrile by ammoxidation and a preparation process thereof. 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 s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/889C07C253/26C07C255/08
CPCB01J23/002B01J23/8898B01J2523/00C07C253/26C07C255/08B01J2523/13B01J2523/22B01J2523/3718B01J2523/41B01J2523/49B01J2523/54B01J2523/67B01J2523/68B01J2523/72B01J2523/842B01J2523/847Y02P20/52
Inventor 李静霞张顺海吴粮华
Owner CHINA PETROLEUM & CHEM CORP