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Acid-base bifunctional catalyst for synthesis of methyl methacrylate by methyl propionate and formaldehyde

A methyl methacrylate, acid-base bifunctional technology, applied in the field of acid-base bifunctional catalysts, can solve the problems of low catalyst activity, poor selectivity, easy deactivation, etc. short step effect

Inactive Publication Date: 2019-07-12
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the problems of low catalyst activity, poor selectivity, and easy deactivation still exist in this process, which have always been obstacles to industrialization.

Method used

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  • Acid-base bifunctional catalyst for synthesis of methyl methacrylate by methyl propionate and formaldehyde
  • Acid-base bifunctional catalyst for synthesis of methyl methacrylate by methyl propionate and formaldehyde
  • Acid-base bifunctional catalyst for synthesis of methyl methacrylate by methyl propionate and formaldehyde

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The catalyst of this embodiment is composed of 5% active component Cs, 5% active component P, 0.1% additive Zr and γ-Al 2 o 3 Vector composition. Wherein, the source of Cs is cesium nitrate, the source of P is ammonium dihydrogen phosphate, and the source of Zr is zirconium nitrate. The specific preparation method is as follows:

[0032] (1) Take by weighing 0.36g cesium nitrate and 0.41g ammonium dihydrogen phosphate and add water to dissolve, be mixed with aqueous solution;

[0033] (2) Weigh 10g γ-Al 2 o 3 For the carrier, add the carrier to the solution prepared in step (1) according to the equal-volume impregnation method, age at room temperature for 10 hours, and then dry at 100° C. for 12 hours;

[0034] (3) Take by weighing 0.035g zirconium nitrate pentahydrate and add water to dissolve, be mixed with aqueous solution;

[0035] (4) Add the solid dried in step (2) to the solution prepared in step (3) by equal volume impregnation, age at room temperature for...

Embodiment 2

[0037] The catalyst of this embodiment consists of 5% active component Cs, 5% active component P, 0.1% additive Fe and β-Al 2 o 3 Vector composition. Among them, the source of Cs is cesium nitrate, the source of P is diammonium hydrogen phosphate, and the source of Fe is iron nitrate. The specific preparation method is as follows:

[0038] (1) Take by weighing 0.36g cesium nitrate and 0.47g diammonium hydrogen phosphate and add water to dissolve, be mixed with aqueous solution;

[0039] (2) Weigh 10g γ-Al 2 o 3 For the carrier, add the carrier to the solution prepared in step (1) according to the equal-volume impregnation method, age at room temperature for 10 hours, and then dry at 100° C. for 12 hours;

[0040] (3) Take by weighing 0.025g ferric nitrate nonahydrate and add water to dissolve, be mixed with aqueous solution;

[0041] (4) Add the solid dried in step (2) to the solution prepared in step (3) by equal volume impregnation, age at room temperature for 10 hours...

Embodiment 3

[0043] The catalyst of this embodiment consists of 5% active component Cs, 10% active component P, 0.3% additive Cu and α-Al 2 o 3 Carrier (after phosphoric acid treatment) composition. Wherein, the Cs source is cesium nitrate, the P source is diammonium hydrogen phosphate, and the Cu source is copper nitrate. The specific preparation method is as follows:

[0044] (1) Weigh 10gα-Al 2 o 3 Carrier, immersed in 4% phosphoric acid aqueous solution for 6h, filtered and washed with deionized water, dried at 100°C for 12h before use;

[0045] (2) Take by weighing 0.36g cesium nitrate and 0.94g diammonium hydrogen phosphate and add water to dissolve, be mixed with aqueous solution;

[0046] (3) Add the carrier obtained in step (1) to the solution prepared in step (2) according to the equal volume impregnation method, age at room temperature for 10 h, and then dry at 100° C. for 12 h;

[0047] (4) Take by weighing 0.091g copper nitrate trihydrate and add water to dissolve, be mixe...

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Abstract

The invention discloses an acid-base bifunctional catalyst for synthesis of methyl methacrylate by methyl propionate and formaldehyde. Active components of the catalyst are Cs and P, an auxiliary agent of the catalyst is one selected from the group consisting of Zr, Fe, Cu, La, Ce, Zn, Co, W and Mo, and a carrier of the catalyst is Al2O3 or Al2O3 treated by phosphoric acid, wherein Al2O3 is one selected from alpha-Al2O3, beta-Al2O3 and gamma-Al2O3. Based on the carrier, the loading capacity of the active components Cs and P is 5-20 wt% based on oxides, the loading capacity of the auxiliary agent is 0.1-1 wt% based on an oxide, and the concentration of a phosphoric acid treatment solution of the carrier is 1-5 wt%. The catalyst provided by the invention has better activity, selectivity andstability, and a simple preparation process, and is suitable for large-scale industrial application.

Description

technical field [0001] The invention relates to an acid-base bifunctional catalyst, in particular to an acid-base bifunctional catalyst for synthesizing methyl methacrylate from methyl propionate and formaldehyde. Background technique [0002] Methyl methacrylate is an important polymer monomer and chemical raw material. It is often used in the production of polymethyl methacrylate (plexiglass) and acrylic resin materials. It is also widely used in the production of plastics, coatings, adhesives and various Industrial additives. In recent years, my country's MMA industry and demand have basically shown a rapid growth trend. From 2009 to 2013, its production capacity increased from 420,000 tons / year to 590,000 tons / year, with a growth rate of 7%; product demand increased from 470,000 tons / year to 690,000 tons / year, with a compound growth rate Reached around 8%. By 2014-2018, the total demand for MMA has increased from 750,000 tons / year to 1 million tons / year, while the pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J37/28B01J27/18B01J27/185B01J27/188B01J27/19C07C67/343C07C69/54
CPCB01J27/1804B01J27/1806B01J27/1808B01J27/1817B01J27/1853B01J27/188B01J27/19B01J37/28C07C67/343C07C69/54
Inventor 李春山王刚郭志军李增喜张锁江
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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