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Catalyst composition, preparation method thereof and method for preparing methyl propionate by using catalyst composition

A technology of methyl propionate and methyl acrylate, applied in the field of catalyst compositions, can solve the problem of low selectivity of hydrogenation reaction

Active Publication Date: 2015-03-04
旭阳化学技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is that the carbon-carbon double bond and carboxyl group in methyl acrylate are easily hydrogenated, so the selectivity of hydrogenation reaction is not high

Method used

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  • Catalyst composition, preparation method thereof and method for preparing methyl propionate by using catalyst composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The carrier is γ-Al calcined at 550℃ 2 O 3 , Weigh out 10g of γ-Al 2 O 3 (BET: 245m 2 / g, 12.4nm), 11ml contains 0.0531g H 2 PtCl 6 ·6H 2 O and 0.0062gRuCl 3 ·3H 2 Aqueous solution of O, soaking the above γ-Al by equal volume immersion method 2 O 3 Carrier: After standing overnight at room temperature, it is dried in a water bath at 50°C, and then dried in an oven at 120°C for 6-8 hours. After calcination at 300°C for 5 hours, it is activated and reduced in a hydrogen gas stream at 350°C for more than 5 hours. Finally Pt-Ru / γRAl 2 O 3 Catalyst, number 1#.

[0040] Using methyl acrylate (MA) as the raw material, under the conditions of 300-350°C, 1.0-2.5 MPa, 0.05-0.20 ml / min of raw material feed, and 2-3 g of catalyst loading, the best result is obtained when evaluating 1# catalyst The result of the reaction is that the MA conversion rate is 100%, and the methyl propionate (MP) selectivity is 100%.

Embodiment 2

[0042] In addition to 0.0077g of RhCl 3 ·3H 2 O instead of RuCl in the dipping solution 3 ·3H 2 Except for the O component, Pt-Rh / γ-Al was prepared with the same material, form and procedure as in Example 1. 2 O 3 Catalyst, number 2#.

[0043] Under the same evaluation conditions as in Example 1, the performance of the 2# catalyst is 99.09% MA conversion and 99.81% MP selectivity.

Embodiment 3

[0045] In addition to 0.0333g PdCl 2 Instead of H in the dipping solution 2 PtCl 6 ·6H 2 Except for the O component, Pd-Ru / γ-Al was prepared with the same material, form and procedure as in Example 1. 2 O 3 Catalyst, number 3#.

[0046] Under the same evaluation conditions as in Example 1, the performance of the 3# catalyst is 99.47% MA conversion and 98.33% MP selectivity.

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Abstract

The application relates to a catalyst composition, a method thereof and a method for preparing methyl propionate by using the catalyst composition. According to the method disclosed by the invention, the side reaction is reduced and the selectivity of the methyl propionate product is improved by adding Ru and Rh to constitute a binary metallic active component system.

Description

Technical field [0001] The application relates to a catalyst composition, a preparation method thereof, and a method for preparing methyl propionate by using the catalyst composition. Background technique [0002] Methyl propionate is mainly used as a solvent and the production of spices, as a solvent for nitrocellulose, as well as for the production of nitro spray paint and coatings, and as a solvent for spices and seasonings. In addition, it is also used as an intermediate in organic synthesis, especially as a raw material for the production of methyl methacrylate (MMA) by the acetal method. With the development of MMA technology in recent years, methyl propionate has gradually become important. [0003] At present, the industrial production of propionate products mainly focuses on the method of esterification using propionic acid, in which the concentrated sulfuric acid catalytic dehydration esterification process is relatively mature. In addition, the process of co-producing p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/46B01J23/89B01J23/50C07C69/24C07C67/303
Inventor 张英伟张凌伟王耀红刘皓张令霞
Owner 旭阳化学技术研究院有限公司
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