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

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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,

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

Example Embodiment

[0077] Example 1

[0078] At 50 °C, 12.6 g bismuth pentahydrate, 16.9 g iron hexahydrate, 12.2 g cobalt nitrate hexahydrate, 12.4 g copper hexahydrate, 5.38 g magnesium hexahydrate, 2.72 g cesium nitrate dissolved in 100 mL 5% nitric acid solution, after the solution is clarified and transparent, add 25 g tartaric acid, after the tartaric acid is completely dissolved, add 10 g glucose, the concentration of sugar in the system after addition is 0.1 g / mL, Then a 350mL solution containing 278g of acrylamide and 62g of methylenebis acrylamide was added. Each of the above steps is accompanied by agitation to allow the additives to dissolve sufficiently. To mix the solution evenly, after clarification, add 150mL of the solution containing 50g of ammonium heptamolybdate tetrahydrate. Finally, the resulting mixed solution was heated to 80 °C to produce a polymerization reaction. Wait for the solution to slowly transform into gels. Place the obtained gel in a thermostatic drying chamber ...

Example Embodiment

[0080] Example 2

[0081] At 50 °C, 12.6 g bismuth nitrate, 16.9 g iron nitrate, 12.2 g cobalt nitrate, 6.2 g copper nitrate, 5.38 g magnesium nitrate, 2.72 g cesium nitrate were dissolved in 100 mL of 5% nitric acid solution, after the solution was clear and transparent, 25 g tartaric acid was added. After tartaric acid is completely dissolved, 10g of glucose is added, the concentration of sugar in the system is 0.1g / mL, and then 350mL of solution containing 278g of acrylamide and 62g of methylenebisacrylamide is added. Each of the above steps is accompanied by agitation to allow the additives to dissolve sufficiently. After the solution is mixed evenly, 150mL of solution containing 50g of ammonium heptamolybdate is added after clarification. Finally, the resulting mixed solution was heated to 80 °C to produce a polymerization reaction. Wait for the solution to slowly transform into gels. Place the obtained gel in a thermostatic drying chamber to dry to form a dry gel. The dry ge...

Example Embodiment

[0083] Example 3

[0084] At 50 °C, 12.6 g of bismuth nitrate, 16.9 g of iron nitrate, 12.2 g of cobalt nitrate, 12.4 g of copper nitrate, 10.75 g of magnesium nitrate, 2.72 g of cesium nitrate were dissolved in 100 mL of 5% nitric acid solution, and after the solution was clarified and transparent, 25 g of tartaric acid was added. After tartaric acid was completely dissolved, 10g of glucose was added, the concentration of sugar in the system was 0.1g / mL, and then a 350mL solution containing 278g of acrylamide and 124g of methylenebisacrylamide was added. Each of the above steps is accompanied by agitation to allow the additives to dissolve sufficiently. After the solution is mixed evenly, 150mL of solution containing 50g of ammonium heptamolybdate is added after clarification. Finally, the resulting mixed solution was heated to 80 °C to produce a polymerization reaction. Wait for the solution to slowly transform into gels. Place the obtained gel in a thermostatic drying chamber t...

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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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