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High-pressure high-load catalyst for olefin ammoxidation reaction

An oxidation reaction and catalyst technology, applied in the preparation of hydrocarbon ammoxidation, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of low operating load conditions and low reaction pressure, and achieve The effect of promoting propylene conversion, tight binding, and reducing by-products of deep oxidation

Inactive Publication Date: 2015-09-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the patent, the catalyst can effectively prevent the yield of acrylonitrile from decreasing when the reaction time is extended, but the evaluation of the catalyst is carried out under the conditions of relatively low reaction pressure and low operating load

Method used

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  • High-pressure high-load catalyst for olefin ammoxidation reaction
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] 1.5 g of sodium hydroxide and 3.8 g of potassium hydroxide were added to 11 g of water and heated and dissolved to obtain material I; 789.0 g of ammonium heptamolybdate (NH 4 ) 6 Mo 7 O 24 ·4H 2 O was dissolved in 800 grams of 80℃ hot water to obtain material II; 153.5 grams of bismuth nitrate Bi(NO 3 ) 3 ·5H 2 O, 131.9 grams of 50wt% manganese nitrate solution, 546.9 grams of nickel nitrate Ni(NO 3 ) 2 ·6H 2 O, 303.9 grams of iron nitrate Fe(NO 3 ) 3 ·9H 2 O, 143.2 grams of magnesium nitrate Mg (NO 3 ) 2 ·2H 2 O, 90.3 grams of chromium nitrate Cr(NO 3 ) 3 ·9H 2 O mix, add 340 grams of water, heat to dissolve as material III; weigh 64.7 grams of neodymium nitrate Nd(NO 3 ) 3 ·6H 2 After dissolving 20 grams of O with water, material IV is obtained.

[0057] Mix material I with 2857 grams of silica sol with a weight concentration of 35%, add materials II, III, and IV in sequence under stirring, and obtain a slurry after thorough stirring. The prepared slurry is placed in a spra...

Embodiment 2

[0060] 6.85 grams of cesium nitrate and 3.6 grams of potassium hydroxide were added to 15 grams of water and heated and dissolved to obtain material I; 748.2 grams of ammonium heptamolybdate (NH 4 ) 6 Mo 7 O 24 ·4H 2 O was dissolved in 750 grams of 80℃ hot water to obtain material II; 205.6 grams of bismuth nitrate Bi(NO 3 ) 3 ·5H 2 O, 250.3 grams of 50wt% manganese nitrate solution, 518.8 grams of nickel nitrate Ni(NO 3 ) 2 ·6H 2 O, 259.5 grams of iron nitrate Fe(NO 3 ) 3 ·9H 2 O, 52.7 grams of anhydrous ammonium metatungstate (NH 4 ) 6 H 2 W 12 O 40 Mix, add 340 grams of water, heat and dissolve it as material III; weigh 30.7 grams of neodymium nitrate Nd(NO 3 ) 3 ·6H 2 O was dissolved by adding 15 grams of water to obtain material IV.

[0061] Mix material I with 2222 grams of silica sol with a weight concentration of 45%, add materials II, III and IV in sequence under stirring, and obtain slurry after thorough stirring. The slurry is placed in a spray dryer according to the usua...

Embodiment 3

[0064] 1.3 grams of sodium hydroxide and 4.4 grams of cesium nitrate were added to 11 grams of water and heated to dissolve to obtain material I; 476.5 grams of ammonium heptamolybdate (NH 4 ) 6 Mo 7 O 24 ·4H 2 O is dissolved in 500 grams of 80℃ hot water to obtain material II; 130.9 grams of bismuth nitrate Bi(NO 3 ) 3 ·5H 2 O, 330.4 grams of nickel nitrate Ni(NO 3 ) 2 ·6H 2 O, 183.6 grams of iron nitrate Fe(NO 3 ) 3 ·9H 2 O, 115.3 grams of magnesium nitrate Mg (NO 3 ) 2 ·2H 2 O, 7.0 grams of niobium oxalate Nb 2 (C 2 O 4 ) 5 Mix, add 240 grams of water, heat to dissolve as material III; weigh out 19.5 grams of neodymium nitrate Nd(NO 3 ) 3 ·6H 2 O and 4.9 grams of cerium nitrate Ce(NO 3 ) 3 ·6H 2 O was dissolved by adding 15 grams of water to obtain material IV.

[0065] Mix material I with 9333 grams of silica sol with a weight concentration of 15%, add materials II, III and IV in sequence under stirring, and obtain a slurry after thorough stirring. The prepared slurry is placed ...

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Abstract

The invention relates to a high-pressure high-load catalyst for an olefin ammoxidation reaction, and is used for mainly solving the problem in the prior art that the yield of acrylonitrile is low under conditions of high pressure and high load. The problem is better solved by adopting the technical scheme that the high-pressure high-load catalyst for the olefin ammoxidation reaction comprises a silica carrier and the following composition represented by the following chemical general formula by atomic ratio: AaBbCcBidMo12Ox, wherein in the formula, A is at least one selected from Li, Na, K, Rb and Cs, B is at least one selected from Ca, Mn, Fe, Co, Ni, Mg, Cr, W, Nb, Ge, P and Ba, C is at least one selected from rare earth elements, and the weight percentage of the carrier is 30-70 wt%. The high-pressure high-load catalyst can be used in industrial production.

Description

Technical field [0001] The invention relates to a high-pressure and high-load catalyst for ammoxidation of olefins. Background technique [0002] Acrylonitrile is an important organic chemical raw material. It is produced by ammoxidation of propylene. In order to obtain a fluidized bed catalyst with high activity and high selectivity, a series of improvements have been made through continuous exploration. These improvements mostly involve the active composition of the catalyst, focusing on the combination of active components of the catalyst to improve the activity and selectivity of the catalyst, so as to achieve an increase in the single-pass yield of acrylonitrile and an increase in the production load. [0003] After more than 40 years of development for the production of acrylonitrile by ammoxidation method, the production capacity of the factory has been close to balance with market demand. At present, the main development trend of acrylonitrile production is to build large...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01J23/887C07C253/26C07C255/08
CPCY02P20/52
Inventor 张顺海姜家乐李静霞吴粮华
Owner CHINA PETROLEUM & CHEM CORP