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Hydrogenation catalyst for unsaturated carboxylic ester and preparation method thereof

A technology for catalyst and hydrogen preparation, which is applied in the preparation of carboxylic acid esters, chemical instruments and methods, and the preparation of organic compounds, and can solve the problems of reducing the conversion rate and selectivity of hydrogenation reactions and low hydrogenation efficiency

Active Publication Date: 2012-05-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] One of the technical problems to be solved by the present invention is the low hydrogenation efficiency caused by the high content of acetic acid in the hydrogenation raw material in the prior art, thereby reducing the conversion rate and selectivity of the hydrogenation reaction, and provides a new Catalyst for hydrogenation of propylene acetate to prepare n-propyl acetate

Method used

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  • Hydrogenation catalyst for unsaturated carboxylic ester and preparation method thereof
  • Hydrogenation catalyst for unsaturated carboxylic ester and preparation method thereof
  • Hydrogenation catalyst for unsaturated carboxylic ester and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] (1) Preparation of composite oxygenate carrier

[0066] Take pulverized porous silicon dioxide, potassium carbonate, sodium carbonate, barium carbonate, copper carbonate, magnesium carbonate, rubidium carbonate, strontium carbonate, cesium carbonate and other compound powder raw materials and place them in a stainless steel turntable. speed rotation. The silica sol with a concentration of 15% (calculated as silicon dioxide) is sprayed onto the powder through a spray gun to make rolling ball seeds. Then slowly add raw material powder and slowly spray into 15% (calculated as silicon dioxide) silica sol for rolling molding. Then transfer the rolled silicon large ball into a pharmaceutical sugar-coating machine and polish it to remove the floating powder on the surface of the sphere and make the sphere have a smoother outer surface to obtain a multi-porous xerogel. After 24 hours of static After setting and gelling, the carrier particle blank is calcined for 3 hours at a ...

Embodiment 2

[0077] (1) Preparation of composite oxygenate carrier

[0078] Carry out according to Example 1, the difference is that the ratio of various raw materials is changed, and the carrier B is obtained.

[0079] By weight, carrier B contained 93.88% silica, 1.56% sodium oxide, 1.49% magnesium oxide, 1.65% barium oxide, 0.22% copper oxide, 0.44% potassium oxide, and 0.32% rubidium oxide , strontium oxide is 0.12%, and cesium oxide is 0.32%.

[0080] (2) Catalyst preparation

[0081] According to embodiment 1.

[0082] (3) Hydrogenation test of propylene acetate

[0083] According to embodiment 1.

Embodiment 3

[0085] (1) Preparation of composite oxygenate carrier

[0086] According to embodiment 2.

[0087] (2) Catalyst preparation

[0088] Press embodiment 1, just chelating agent A is changed into chelating agent B.

[0089] (3) Hydrogenation test of propylene acetate

[0090] According to embodiment 1.

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Abstract

The invention relates to catalyst for preparing n-propyl acetate by hydrogenating allyl acetate and a preparation method thereof, aiming to mainly solve the problem of low activity of a hydrogenation catalyst resulted from higher content of acetic acid in the allyl acetate in the prior art. The problem is well solved by adopting the technical scheme as follows: the catalyst disclosed by the invention contains 0.1-1.0 part by weight of active component and 99-99.9 parts by weight of compound oxide carrier, wherein the active component is selected from at least one of palladium, ruthenium and rhodium; the compound oxide carrier contains 1.0-25.0 parts by weight of at least one of alkali metal oxide and alkali-earth metal oxide and 75.0-99 parts by weight of at least one of silicon oxide or aluminium oxide; Pd in the catalyst is distributed on the carrier in a shell manner; and the thickness of the Pd layer is 50-300 mum. The hydrogenation catalyst for the unsaturated carboxylic ester and the preparation method thereof can be applied to industrial production for preparing the n-propyl acetate by hydrogenating allyl acetate.

Description

technical field [0001] The invention relates to a catalyst for preparing n-propyl acetate by hydrogenation of propylene acetate and a preparation method thereof. Background technique [0002] N-Propyl Acetate is a colorless transparent liquid with a fruity aroma. It naturally exists in apples, bananas, black currants, grapes, melons, jackfruit, strawberries and other fruits. It is a synthetic food flavor that is allowed to be used and can also be used as food preservative. N-propyl acetate can be miscible with most solvents such as alcohol, ketone, ether, etc. It is known as "universal solvent". It is widely used as a solvent for high-grade paint and high-grade ink. N-propyl acetate is a mild and quick-drying agent because of its solubility, selective dehydration and volatilization speed. N-propyl acetate can also be used as impregnating agent, dehydrating agent, drug extractant and lubricant in fabrics, plastics, petroleum industry, paper industry, and pharmaceutical indu...

Claims

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Application Information

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IPC IPC(8): B01J23/58B01J23/89C07C69/14C07C67/283
Inventor 杨运信张丽斌张士福宋朝红秦群英
Owner CHINA PETROLEUM & CHEM CORP