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Catalyst for preparing methylacrolein in fixed bed, preparation method and application

A technology of methacrolein and methylenebisacrylamide, which is applied in catalyst activation/preparation, chemical instruments and methods, preparation of organic compounds, etc., can solve problems such as poor repeatability, poor sintering activity, and poor uniformity. , to achieve the effect of small particle size, reduced powder agglomeration, and easy control of uniformity.

Pending Publication Date: 2022-05-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing catalysts including the previous comparison are all prepared by coprecipitation method, the powder agglomeration phenomenon is more serious, the uniformity is poor, the repeatability is poor, and the sintering activity is poor. It is suitable for occasions with low product requirements or small batches in the laboratory preparation occasion

Method used

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  • Catalyst for preparing methylacrolein in fixed bed, preparation method and application
  • Catalyst for preparing methylacrolein in fixed bed, preparation method and application
  • Catalyst for preparing methylacrolein in fixed bed, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] Dissolve 12.6g bismuth nitrate pentahydrate, 16.9g ferric nitrate nonahydrate, 12.2g cobalt nitrate hexahydrate, 12.4g copper nitrate hexahydrate, 5.38g magnesium nitrate hexahydrate, 2.72g cesium nitrate in 100mL 5% nitric acid solution at 50°C After the solution is clear and transparent, add 25g of tartaric acid. After the tartaric acid is completely dissolved, add 10g of glucose. After the addition, the concentration of sugar in the system is 0.1g / mL. 350mL solution. Each of the above steps is accompanied by stirring to fully dissolve the additives. After the solution is evenly mixed, add 150mL of a solution containing 50g of ammonium heptamolybdate tetrahydrate after clarification. Finally, heat the resulting mixed solution to 80°C to make After a polymerization reaction occurs, the solution is slowly transformed into a gel. The obtained gel is placed in a constant temperature drying oven to dry to form a xerogel. The xerogel is ground into a fine powder and calcined...

Embodiment 2

[0081] Dissolve 12.6g of bismuth nitrate, 16.9g of iron nitrate, 12.2g of cobalt nitrate, 6.2g of copper nitrate, 5.38g of magnesium nitrate, and 2.72g of cesium nitrate in 100mL of 5% nitric acid solution at 50°C. After the solution is clear and transparent, add 25g of tartaric acid. After the tartaric acid is completely dissolved, add 10g of glucose, the concentration of sugar in the system after adding is 0.1g / mL, then add 350mL solution containing 278g of acrylamide and 62g of methylenebisacrylamide. Each of the above steps is accompanied by stirring, so that The additives are fully dissolved. After the solution is mixed evenly, add 150mL of a solution containing 50g of ammonium heptamolybdate after clarification. Finally, heat the resulting mixed solution to 80°C to make it polymerize. Wait until the solution slowly turns into a gel. The obtained gel was dried in a constant temperature drying oven to form a xerogel. The xerogel was ground into a fine powder and calcined a...

Embodiment 3

[0084] Dissolve 12.6g of bismuth nitrate, 16.9g of iron nitrate, 12.2g of cobalt nitrate, 12.4g of copper nitrate, 10.75g of magnesium nitrate, and 2.72g of cesium nitrate in 100mL of 5% nitric acid solution at 50°C. After the solution is clear and transparent, add 25g tartaric acid. After the tartaric acid is completely dissolved, add 10g of glucose, the concentration of sugar in the system after adding is 0.1g / mL, then add 350mL solution containing 278g of acrylamide and 124g of methylenebisacrylamide. Each of the above steps is accompanied by stirring so that The additives are fully dissolved. After the solution is mixed evenly, add 150mL of a solution containing 50g of ammonium heptamolybdate after clarification. Finally, heat the resulting mixed solution to 80°C to make it polymerize. Wait until the solution slowly turns into a gel. The obtained gel was dried in a constant temperature drying oven to form a xerogel. The xerogel was ground into a fine powder and calcined at...

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Abstract

The invention discloses a catalyst for preparing methylacrolein in a fixed bed, a preparation method and application. The composition of the catalyst is Mo Bi Fe < c > Co < d > Cu < e > Mg < f > C < sg > O < x >, a is equal to 12, 0lt; blt; 3.5, 0 lt; clt; ct; 3, 0lt; dlt; 8, 0lt; lt, lt; 3, 0lt; flt; 3, 0lt; glt; 2; and x is the number of oxygen atoms required for forming the composite oxide. In the preparation process of the catalyst, salts or oxides containing Mo, Bi, Fe, Co, Cu, Mg and Cs are added to form a dispersion system, and meanwhile, a complexing agent, a polymer monomer and a cross-linking agent are added into the dispersion system step by step or directly, so that the purposes of controlling the morphology, granularity and uniformity of the catalyst and further improving the activity and selectivity of the catalyst are achieved.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a catalyst for preparing 2-methacrolein by catalyzing isobutene or tert-butanol, a preparation method and an application. Background technique [0002] Methyl methacrylate (MMA) is an important organic chemical raw material, mainly used in the production of polymethyl methacrylate (plexiglass), polyvinyl chloride additive ARC and as the second monomer for acrylic fiber production, also It can be copolymerized with other vinyl monomers to obtain products with different properties, which can be used as resins, adhesives, ion exchange resins, paper polishing agents, textile printing and dyeing auxiliaries, leather treatment agents, lubricating oil additives, crude oil pour point depressants, and insulating potting materials And plasticizers of plastic emulsions, etc., have a wide range of uses. [0003] The wide use of methyl methacrylate and its excellent characteristics have de...

Claims

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Application Information

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IPC IPC(8): B01J23/887B01J37/03B01J37/08B01J37/00C07C45/35C07C45/38C07C47/22
CPCB01J23/8876B01J23/002B01J37/036B01J37/086B01J37/0018C07C45/35C07C45/38B01J2523/00C07C47/22B01J2523/15B01J2523/17B01J2523/22B01J2523/54B01J2523/68B01J2523/842B01J2523/845Y02P20/584
Inventor 张作峰师慧敏张东顺冯晔安欣袁滨刘玉芬
Owner CHINA PETROLEUM & CHEM CORP
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