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Hydrogenation catalyst and application thereof as well as preparation method of cyclohexane-1, 2-diformylic acid dibasic ester

A technology of phthalic acid dibasic ester and hydrogenation catalyst, which is applied in the field of hydrogenation catalyst and its application, can solve the problem that product selectivity needs to be further improved, and achieve high raw material conversion rate and product selectivity, high catalytic active effect

Active Publication Date: 2018-03-09
HUNAN CHANGLING PETROCHEM SCI & TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The purpose of the present invention is to overcome the technical problems that the reaction temperature is too high and the product selectivity still needs to be further improved in the existing preparation method of cyclohexane-1,2-dicarboxylate, and provide a hydrogenation catalyst and The preparation method of cyclohexane-1,2-dicarboxylic acid dibasic ester using the hydrogenation catalyst, the catalyst shows higher activity at low temperature, not only can obtain a higher conversion rate of raw materials, but also can obtain a higher product selectivity

Method used

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  • Hydrogenation catalyst and application thereof as well as preparation method of cyclohexane-1, 2-diformylic acid dibasic ester
  • Hydrogenation catalyst and application thereof as well as preparation method of cyclohexane-1, 2-diformylic acid dibasic ester
  • Hydrogenation catalyst and application thereof as well as preparation method of cyclohexane-1, 2-diformylic acid dibasic ester

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preparation example Construction

[0084] According to a fourth aspect of the present invention, the present invention further provides a method for preparing cyclohexane-1,2-dicarboxylic acid dibasic ester, the method comprising the following steps:

[0085] (1) The first hydrogenation step, in the first hydrogenation step, hydrogen is fed into the raw material liquid containing phthalic acid dibasic ester to form the first gas-liquid mixture, and the first gas-liquid mixture is sent to into the first reactor filled with the first hydrogenation catalyst, and under the first hydrogenation reaction conditions, the first gas-liquid mixture is contacted with the first hydrogenation catalyst to obtain the first post-hydrogenation reaction liquid;

[0086] (2) The second hydrogenation step, in the second hydrogenation step, the first supplementary hydrogen is fed into the reaction liquid after the first hydrogenation to form a second gas-liquid mixture, and the second gas-liquid mixture is Into the second reactor f...

Embodiment 1

[0119] In this example, the first hydrogenation catalyst (Rh-Sm / C, ​​containing 0.6% by weight of Rh and 5.0% by weight of Sm) was prepared by the following method:

[0120] (1) 1.53 grams of RhCl 3 ·3H 2 O and 12.15 g SmCl 3 ·6H 2 O is made into 100mL impregnation solution;

[0121] (2) 94.4 grams of activated carbon was placed in the impregnating solution, and immersed for 10 hours at ambient temperature (25°C);

[0122] (3) Place the impregnated activated carbon in an aqueous solution of hydrazine hydrate at a temperature of 50° C., and react for 6 hours;

[0123] (4) The solid-phase substance was separated from the reaction mixture obtained in step (3), washed three times with deionized water, and dried in an air atmosphere at a temperature of 80° C. for 12 hours, thereby obtaining a first hydrogenation catalyst.

[0124] The second hydrogenation catalyst Ru-Eu / C (containing 2wt% Ru and 0.1wt% Eu) was prepared by the same method as the first hydrogenation catalyst, ex...

Embodiment 2

[0135] Adopt the same method as Example 1 to prepare cyclohexane-1,2-dibasic acid dibasic ester, the difference is that the carrier of the first hydrogenation catalyst is Al 2 o 3 , namely Rh-Sm / Al 2 o 3 (Contains 0.6 wt% Rh and 5.0 wt% Sm).

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Abstract

The invention discloses a hydrogenation catalyst and application thereof. The hydrogenation catalyst is prepared from a carrier as well as main active element(s) and additive elements which are loadedon the carrier, wherein the main active element(s) is / are Rh or / and Ru, the additive elements are selected from Sm, Eu and Yb, and the carrier is selected from activated carbon, Al2O3 and SiO2. The invention also discloses a method for preparing cyclohexane-1, 2-diformylic acid dibasic ester by using the hydrogenation catalyst. The hydrogenation catalyst provided by the invention has higher hydrogenation catalytic activity, also shows higher catalytic activity even at the lower reaction temperature when being used as the catalyst for preparing the cyclohexane-1, 2-diformylic acid dibasic ester by carrying out hydrogenation on diisonoyl phthalate dibasic ester, and has higher raw material conversion rate and product selectivity.

Description

technical field [0001] The invention relates to a hydrogenation catalyst and application thereof, and also relates to a preparation method of cyclohexane-1,2-dicarboxylic acid dibasic ester using the hydrogenation catalyst. Background technique [0002] Plasticizers are the most widely used additives in the plastics industry, and play a decisive role in promoting the development of the plastics industry, especially the polyvinyl chloride (PVC) industry. Among the plasticizers, traditional dibasic phthalates are used in the largest amount. They are mainly used as plasticizers and softeners for rubber and plastic materials such as polyvinyl chloride in industry. They are also widely added to daily-use polymer rubber and plastic products. Such as children's toys, food packaging materials, medical materials, household and car decoration materials. However, the suspicion of carcinogenicity and toxicity of dibasic phthalates has aroused close attention from all walks of life arou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/63C07C67/303C07C69/75
CPCB01J23/63C07C67/303C07C69/75
Inventor 佘喜春向明林汪永军敖博杜鹏周冬京
Owner HUNAN CHANGLING PETROCHEM SCI & TECH DEV CO LTD
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