Catalyst for preparing acrylonitrile through propylene ammoxidation as well as preparation method and application of catalyst

A catalyst and acrylonitrile technology, applied in the preparation of hydrocarbon ammoxidation, catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, etc., can solve the problems of high alkali metal impurity content, gap in catalytic performance, and gelation time Short and other problems, to achieve the effect of increasing the yield of hydrocyanic acid, increasing the amount of lattice oxygen, and improving the processing capacity

Pending Publication Date: 2021-09-03
营口风光新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the existing synthetic method, the silica sol that adopts, the main problem that exists is: the domestic silica sol alkali metal impurity content is high, particle size distribution is wide, and viscosity is big, and gelation time is short under high concentration, and the synthetic acrylonitrile catalyst and Compared with the catalyst synthesized with imported silica sol, the catalytic performance gap is obvious, so the production of domestic acrylonitrile catalyst is highly dependent on imported silica sol

Method used

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  • Catalyst for preparing acrylonitrile through propylene ammoxidation as well as preparation method and application of catalyst
  • Catalyst for preparing acrylonitrile through propylene ammoxidation as well as preparation method and application of catalyst
  • Catalyst for preparing acrylonitrile through propylene ammoxidation as well as preparation method and application of catalyst

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A catalyst for producing acrylonitrile by ammoxidation of propylene, the preparation method comprising the steps of:

[0029] 1) After dissolving 3.53 grams of potassium nitrate, 7.81 grams of cesium nitrate, 278.6 grams of ferric nitrate, 522.2 grams of nickel nitrate, 123.5 grams of magnesium nitrate, 156.4 grams of barium nitrate, 5.97 grams of praseodymium nitrate and 109.7 grams of bismuth nitrate in 60ml of water respectively, The resulting aqueous solution was mixed uniformly to obtain Solution I;

[0030] 2) Dissolve 853.7 grams of ammonium molybdate in 100 ml of water, then add 2715.6 grams of silica sol (the particle size of silicon dioxide contained in the silica sol is about 20 nm) to obtain solution II;

[0031] 3) Mix solution I and solution II, adjust the pH of the mixed solution to 4-6, and stir at 80° C. for 30 minutes to obtain slurry I.

[0032] 4) Slurry I was spray-dried, granulated, and calcined at 620° C. for 3 hours to obtain a catalyst for the ...

Embodiment 2

[0035] 1) After dissolving 3.71 grams of potassium nitrate, 2.82 grams of rubidium nitrate, 8.21 grams of cesium nitrate, 292.53 grams of ferric nitrate, 548.31 grams of nickel nitrate, 129.68 grams of magnesium nitrate, 6.269 grams of praseodymium nitrate and 115.19 grams of bismuth nitrate in 60ml of water respectively, The resulting aqueous solution was mixed uniformly to obtain Solution I;

[0036] 2) Dissolve 896.39 grams of ammonium molybdate in 100 ml of water, then add 2851.38 grams of silica sol (the particle diameter of silicon dioxide contained in the silica sol is about 20 nm) to obtain solution II;

[0037] 3) Mix solution I and solution II, adjust the pH of the mixed solution to 4-6, and stir at 80° C. for 30 minutes to obtain slurry I.

[0038] 4) Slurry I was spray-dried, granulated, and calcined at 620° C. for 3 hours to obtain a catalyst for the ammoxidation of propylene to acrylonitrile.

[0039] The resulting product is detected by gas chromatography, and ...

Embodiment 3

[0041] 1) after dissolving 3.60 grams of potassium nitrate, 7.97 grams of cesium nitrate, 284.17 grams of iron nitrate, 532.65 grams of nickel nitrate, 125.97 grams of magnesium nitrate, 73.86 grams of cobalt nitrate, 6.09 grams of praseodymium nitrate and 111.90 grams of bismuth nitrate in 60ml of water respectively, The resulting aqueous solution was mixed uniformly to obtain Solution I;

[0042] 2) Dissolve 870.77 grams of ammonium molybdate in 100 ml of water, then add 2769.91 grams of silica sol (the particle size of silicon dioxide contained in the silica sol is about 20 nm) to obtain solution II;

[0043] 3) Mix solution I and solution II, adjust the pH of the mixed solution to 4-6, and stir at 80° C. for 30 minutes to obtain slurry I.

[0044] 4) Slurry I was spray-dried, granulated, and calcined at 620° C. for 3 hours to obtain a catalyst for the ammoxidation of propylene to acrylonitrile.

[0045] The resulting product is detected by gas chromatography, and the resu...

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Abstract

The invention relates to a catalyst for preparing acrylonitrile through propylene ammoxidation as well as a preparation method and application of the catalyst. The catalyst takes silicon dioxide in silica sol as a carrier, and contains an active component represented by a general formula of AaBbCcBidMo<13.2>Ox, wherein A is at least one selected from K, Rb and Cs; B is at least one of Ca, Mn, Fe, Co, Ni, Mg, W, Sr and Ba; C is at least one selected from rare earth elements La, Ce, Pr, Nd, Pm and Sm; the value range of a is 0.01 to 2.5; the value range of b is 1-15; the value range of c is 0.01 to 5; the value range of d is 0.01 to 3; x is the total number of oxygen atoms required for meeting the valence of each element in the catalyst. The prepared catalyst well solves the problem that domestic silica sol is difficult to be applied to acrylonitrile catalysts, and can be applied to industrial production of acrylonitrile through propylene ammoxidation.

Description

technical field [0001] The invention belongs to the field of catalysts, in particular to a catalyst for producing acrylonitrile by ammoxidation of propylene, a preparation method and application thereof. Background technique [0002] Acrylonitrile is an important monomer of the three major synthesis, and it is mainly used to produce polyacrylonitrile fiber (acrylic fiber) at present. Secondly, it is used to produce ABS resin (copolymer of acrylonitrile-butadiene-styrene) and synthetic rubber (copolymer of acrylonitrile-butadiene). Acrylic acid obtained by the hydrolysis of acrylonitrile is the monomer for the synthesis of acrylic resin. Acrylonitrile is electrolytically hydrogenated to produce adiponitrile, which is the raw material for the production of nylon-66 and one of the important petrochemical products. In the existing synthetic method, the silica sol that adopts, the main problem that exists is: the domestic silica sol alkali metal impurity content is high, partic...

Claims

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Application Information

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IPC IPC(8): B01J23/887B01J37/00B01J37/08C07C253/26C07C255/08
CPCB01J23/8876B01J23/002B01J37/0045B01J37/088C07C253/26C07C255/08B01J2523/00B01J35/23B01J2523/13B01J2523/15B01J2523/22B01J2523/25B01J2523/3718B01J2523/41B01J2523/54B01J2523/68B01J2523/842B01J2523/847B01J2523/14B01J2523/845Y02P20/52
Inventor 许才宇王磊刘江高志峰张成林
Owner 营口风光新材料股份有限公司
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