High selectivity catalyst for production of acrylonitrile by propylene ammoxidation

An acrylonitrile catalyst, high-selectivity technology, applied in the preparation of hydrocarbon ammoxidation, physical/chemical process catalyst, metal/metal oxide/metal hydroxide catalyst, etc., can solve the low operating load conditions, low reaction pressure, etc. problem, to achieve the effect of reducing the yield and promoting the conversion of propylene

Inactive Publication Date: 2017-04-26
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 selectivity catalyst for production of acrylonitrile by propylene ammoxidation
  • High selectivity catalyst for production of acrylonitrile by propylene ammoxidation
  • High selectivity catalyst for production of acrylonitrile by propylene ammoxidation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] 0.3 gram of sodium hydroxide and 3.6 gram of potassium hydroxide add 11 grams of water and dissolve after heating, obtain material I; 748.7 gram of ammonium heptamolybdate (NH 4 ) 6 Mo 7 o 24 4H 2 O was dissolved in 800 grams of hot water at 80°C to obtain material II; 145.0 grams of bismuth nitrate Bi(NO 3 ) 3 ·5H 2 O, 49.8 grams of 50wt% manganese nitrate solution, 619.8 grams of nickel nitrate Ni (NO 3 ) 2 ·6H 2 O, 373.1 grams of iron nitrate Fe (NO 3 ) 3 9H 2 O, 135.2 grams of magnesium nitrate Mg (NO 3 ) 2 2H 2 O, 8.3 grams of calcium nitrate Ca(NO 3 ) 2 4H 2 O, 71.1 grams of chromium nitrate Cr (NO 3 ) 3 9H 2 O mixed, add 340 grams of water, heat and dissolve as material III; take by weighing 137.5 grams of neodymium nitrate Nd (NO 3 ) 3 ·6H 2 After O was dissolved in 30 grams of water, material IV was obtained.

[0058] Mix material I with 2500 grams of silica sol with a weight concentration of 40%, add materials II, III and IV in turn unde...

Embodiment 2

[0061] 6.07 grams of rubidium nitrate and 4.2 grams of potassium hydroxide add 15 grams of water and dissolve after heating to obtain material I; 877.1 grams of ammonium heptamolybdate (NH 4 ) 6 Mo 7 o 24 4H 2 O was dissolved in 900 grams of hot water at 80°C to obtain material II; 199.8 grams of bismuth nitrate Bi(NO 3 ) 3 ·5H 2 O, 145.9 grams of 50wt% manganese nitrate solution, 181.5 grams of nickel nitrate Ni (NO 3 ) 2 ·6H 2 O, 16.8 grams of iron nitrate Fe (NO 3 ) 3 9H 2 O, 71.8 grams of anhydrous ammonium metatungstate (NH 4 ) 6 h 2 W 12 o 40 and 83.3 grams of chromium nitrate Cr (NO 3 ) 3 9H 2 O mixed, add 340 grams of water, heat and dissolve as material III; take by weighing 89.5 grams of neodymium nitrate Nd (NO 3 ) 3 ·6H 2 After O was dissolved in 15 grams of water, material IV was obtained.

[0062] Mix material I with 2500 grams of silica sol with a weight concentration of 40%, add materials II, III and IV in turn under stirring, and obtain a...

Embodiment 3

[0065] 0.9 gram of sodium hydroxide and 6.6 gram of cesium nitrate add 11 grams of water and dissolve after heating, obtain material I; 479.4 gram of ammonium heptamolybdate (NH 4 ) 6 Mo 7 o 24 4H 2 O was dissolved in 500 grams of 80°C hot water to obtain material II; 131.1 grams of bismuth nitrate Bi(NO 3 ) 3 ·5H 2 O, 264.6 grams of nickel nitrate Ni (NO 3 ) 2 ·6H 2 O, 284.8 grams of iron nitrate Fe (NO 3 ) 3 9H 2 O, 52.0 grams of magnesium nitrate Mg (NO 3 ) 2 2H 2 O, 27.9 grams niobium oxalate Nb 2 (C 2 o 4 ) 5 Mix, add 240 grams of water, heat and dissolve as material III; take by weighing 14.7 grams of neodymium nitrate Nd (NO 3 ) 3 ·6H 2 After O was dissolved in 15 grams of water, material IV was obtained.

[0066] Mix material I with 3500 grams of silica sol with a weight concentration of 40%, add materials II, III and IV in turn under stirring, and obtain a slurry after fully stirring, and put the prepared slurry in a spray dryer according to the u...

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Abstract

The invention relates to a high selectivity catalyst for production of acrylonitrile by propylene ammoxidation, and mainly solves the problems of low yield of useful byproducts acetonitrile and hydrocyanic acid and high yield of acrolein in previous technologies. The high selectivity catalyst for production of acrylonitrile by propylene ammoxidation adopted by the invention comprises a silica carrier and a composition with a chemical general formula shown as AaBbCcFedNieBifMo12Ox in an atomic ratio, wherein A is selected from at least one of Li, Na, K, Rb and Cs, B is selected from at least one of Ca, P, Mn, Co, Mg, Cr, W, Nb, Ge and Ba, and C is selected from at least one of rare earth elements. Technical scheme well solves the technical problem, and can be applied to industrial production of acrylonitrile.

Description

technical field [0001] The invention relates to a catalyst for producing acrylonitrile by ammoxidation of propylene with high selectivity. Background technique [0002] Acrylonitrile is an important organic chemical raw material, which is produced by ammoxidation of propylene. In order to obtain a fluidized bed catalyst with high activity and high selectivity, people have made a series of improvements through continuous exploration. Most of these improvements involve the active composition of the catalyst, focusing on the combination of the active components of the catalyst to improve the activity and selectivity of the catalyst, thereby achieving an increase in the single-pass yield of acrylonitrile and an increase in production load. [0003] After more than 50 years of development in the production of acrylonitrile by ammoxidation, there is still a gap in the demand for acrylonitrile in recent years. At present, the main development trend of acrylonitrile production is t...

Claims

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Application Information

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