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Catalyst for preparing 1,4-cyclohexane dimethanol as well as preparation method and application thereof

A technology of cyclohexanedimethanol and dimethyl cyclohexanedicarboxylate is applied in the field of catalysts for preparing 1,4-cyclohexanedimethanol, can solve problems such as affecting yield and purity, and achieve yield and purity improved effect

Pending Publication Date: 2021-05-04
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The problem to be solved by the present invention is that in the prior art, the hydrogenation of 1,4-cyclohexanedicarboxylate to 1,4-cyclohexanedimethanol has many intermediate products and affects the yield and purity. new catalyst

Method used

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  • Catalyst for preparing 1,4-cyclohexane dimethanol as well as preparation method and application thereof
  • Catalyst for preparing 1,4-cyclohexane dimethanol as well as preparation method and application thereof
  • Catalyst for preparing 1,4-cyclohexane dimethanol as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1: A catalyst for preparing 1,4-cyclohexanedimethanol and a method for preparing 1,4-cyclohexanedimethanol

[0029] (1) The preparation method of catalyst:

[0030] S1. Weigh 56.1g of sodium bicarbonate and dissolve it in 504.9g of deionized water, stir and heat to 80°C at 500rpm / min;

[0031] S2. take again 34.6g tetraethyl orthosilicate and dissolve in 34.6g ethanol, drop in the sodium bicarbonate solution through the constant pressure dropping funnel;

[0032] S3. Weigh again 60.6g copper nitrate trihydrate and 0.19g magnesium nitrate hexahydrate and dissolve them in 242.4g deionized water together. The pH of the solution was 9.0, and the reaction was continued for 1 hour, and aged at 25°C for 12 hours.

[0033] S4. Take 1 L of deionized water for suction filtration and washing, and the precipitate after suction filtration is dried at 90° C. for 12 hours, and then calcined at 400° C. for 4 hours to obtain catalyst CAT-1.

[0034] (2) This catalyst is used ...

Embodiment 2

[0037] Example 2: A catalyst for preparing 1,4-cyclohexanedimethanol and a method for preparing 1,4-cyclohexanedimethanol

[0038] (1) The preparation method of catalyst:

[0039] S1. Weigh 56.1g of sodium bicarbonate and dissolve it in 504.9g of deionized water, stir and heat to 80°C at 500rpm / min;

[0040] S2. take again 34.6g tetraethyl orthosilicate and dissolve in 34.6g ethanol, drop in the sodium bicarbonate solution through the constant pressure dropping funnel;

[0041] S3. Weigh again 60.6g copper nitrate trihydrate and 1.9g magnesium nitrate hexahydrate and dissolve them in 242.4g deionized water together. The pH of the solution was 9.0, the reaction was continued for 1 hour, and then aged at 25°C for 2 hours.

[0042] S4. Take 1 L of deionized water for suction filtration and washing, and the precipitate after suction filtration is dried at 90° C. for 12 hours, and then calcined at 400° C. for 4 hours to obtain catalyst CAT-2.

[0043] (2) This catalyst is used f...

Embodiment 3

[0046] Example 3: A catalyst for preparing 1,4-cyclohexanedimethanol and a method for preparing 1,4-cyclohexanedimethanol

[0047] (1) The preparation method of catalyst:

[0048] S1. Weigh 56.1g of sodium bicarbonate and dissolve it in 504.9g of deionized water, stir and heat to 80°C at 500rpm / min;

[0049] S2. take again 34.6g tetraethyl orthosilicate and dissolve in 34.6g ethanol, drop in the sodium bicarbonate solution through the constant pressure dropping funnel;

[0050] S3. Weigh again 60.6g copper nitrate trihydrate and 1.1g aluminum nitrate nonahydrate and dissolve them in 242.4g deionized water together. The pH of the solution was 9.0, the reaction was continued for 1 hour, and then aged at 25°C for 2 hours.

[0051] S4. Take 1 L of deionized water and wash with suction, and the filtered precipitate is dried at 90° C. for 12 hours, and then calcined at 400° C. for 4 hours to obtain catalyst CAT-3.

[0052] (2) This catalyst is used for hydrogenation to prepare 1,...

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Abstract

The invention relates to a catalyst for preparing 1, 4-cyclohexane dimethanol as well as a preparation method and application thereof. According to the catalyst, SiO2 serves as a carrier, Cu serves as an active component, the mass of the active component accounts for 45%-75% of that of the hydrogenation catalyst, Mg, Al, Zn, Ni and the like serve as auxiliaries, the mass of the auxiliaries accounts for 0.05%-0.5% of that of the hydrogenation catalyst, and the catalyst is prepared through a co-precipitation method. The catalyst prepared by the method has the advantages of high specific surface area and uniform particle size, can effectively reduce intermediate products when being used for preparing 1,4-cyclohexane dimethanol by hydrogenation of dimethyl 1,4-cyclohexane dicarboxylate so as to improve selectivity, and has a very high trans-cis ratio.

Description

technical field [0001] The invention relates to a catalyst for preparing 1,4-cyclohexanedimethanol, which belongs to the technical field of catalytic hydrogenation. Background technique [0002] 1,4-Cyclohexanedimethanol (CHDM), white waxy solid. There are two different structural formulas, trans and cis, with a melting point of 43°C (cis), 70°C (trans), and a boiling point of 286°C. The relative density is 1.150 (20 / 4°C). The sublimation temperature is 160°C, miscible with water and alcohol, soluble in ketone, almost insoluble in aliphatic hydrocarbon and ether. [0003] 1,4-Cyclohexanedimethanol (CHDM) is an important new raw material for polyester production in industry. It is mainly used to synthesize PETG copolyester with 1,4-cyclohexanedimethanol as raw material. Other unsaturated polyester resins modified and synthesized can be used to make high-quality coatings, lamination and injection molding resins; they also have high electrical resistance and good corrosion ...

Claims

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Application Information

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IPC IPC(8): B01J23/72B01J23/755B01J23/80B01J35/10C07C29/149C07C31/135
CPCB01J23/78B01J23/80B01J23/72B01J23/755C07C29/149C07C2601/14B01J35/615B01J35/647C07C31/1355Y02P20/584
Inventor 何明阳刘磊孙中华钱俊峰周维友陈群
Owner CHANGZHOU UNIV
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