Hydrogenation catalyst and preparation method of 1,4-cyclohexanedimethanol

A technology of cyclohexanedimethanol and hydrogenation catalyst, which is applied in the preparation of organic compounds, preparation of hydroxyl compounds, chemical instruments and methods, etc., can solve the problems of difficult recovery of precious metals, and achieve low cost, simple preparation method, and easy recovery Effect

Inactive Publication Date: 2011-03-02
CHANGZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage of this patented technology is that it is difficult to recover precious metals in the catalyst

Method used

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  • Hydrogenation catalyst and preparation method of 1,4-cyclohexanedimethanol
  • Hydrogenation catalyst and preparation method of 1,4-cyclohexanedimethanol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment one: in the autoclave with stirring, add 0.5g of 5%Ru-6%Sn / mesoporous carbon catalyst (the pore volume of carrier mesoporous carbon is 2.0mL / g, specific surface area is 1500m 2 / g, pore diameter is 5nm, carrier mesoporous carbon without pretreatment), 1.5g of 1,4-cyclohexanedicarboxylic acid, 25ml of distilled water, close the reactor, replace the air in the reactor with nitrogen for three times, and then use hydrogen Replace the nitrogen in the reactor for three times, then fill the reactor with hydrogen to make the reaction pressure of the reactor reach 8.0MPa, heat the reactor to make the reaction temperature reach 230°C, start stirring, keep the temperature until the pressure no longer drops, take out the reaction product, and filter The catalyst was removed and analyzed by gas chromatography.

Embodiment 2

[0018] Embodiment two: in the autoclave with agitation, add 5%Ru-6%Sn / mesoporous carbon catalyst 0.5g (carrier mesoporous carbon is through 1M hydrochloric acid pretreatment 24 hours, and the pore volume of carrier mesoporous carbon is 1.7 mL / g, the specific surface area is 1800m 2 / g, pore diameter is 4nm), 1,4-cyclohexanedicarboxylic acid 1.5g, distilled water 25ml, close reactor, replace the air in the reactor with nitrogen three times, then replace the nitrogen in the reactor with hydrogen three times, Then recharge hydrogen to make the reaction pressure of the reactor reach 8.0MPa, heat the reactor to make the reaction temperature reach 230°C, start stirring, keep the temperature until the pressure no longer drops, take out the reaction product, remove the catalyst by filtration, and analyze by gas chromatography.

Embodiment 3

[0019] Embodiment three: in the autoclave with agitation, add 5%Ru-9%Sn / mesoporous carbon catalyst 0.5g (carrier mesoporous carbon is pretreated 2 hours with 6M hydrochloric acid, the pore volume of carrier mesoporous carbon is 2.4 mL / g, specific surface area is 1400m 2 / g, pore diameter is 7nm,), 1,4-cyclohexanedicarboxylic acid 1.5g, distilled water 25ml, close reactor, replace the air in the reactor with nitrogen three times, then replace the nitrogen in the reactor with hydrogen three times, Then recharge hydrogen to make the reaction pressure of the reactor reach 8.0MPa, heat the reactor to make the reaction temperature reach 250°C, start stirring, keep the temperature until the pressure no longer drops, take out the reaction product, remove the catalyst by filtration, and analyze by gas chromatography.

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PUM

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Abstract

The invention discloses a hydrogenation catalyst and a preparation method of 1,4-cyclohexanedimethanol. The hydrogenation catalyst comprises a carrier and active components, wherein the carrier is mesoporous carbon, the active components are Ru and Sn, and the load capacity of the active components saccounts for 5%-15% of the hydrogenation catalyst in mass. The preparation method of the 1,4-cyclohexanedimethanol adopts the catalyst of the invention, and under the condition of a solvent and hydrogenation, the target product is produced with high selectivity. The catalyst and the method of the invention keep higher conversion rate and yield in reaction, simultaneously can maintain long service life of the catalyst, use the cheap mesoporous carbon as the carrier to reduce the cost of the catalyst, improve the reutilization rate of noble metal, and reduce consumption of the catalyst.

Description

technical field [0001] The invention relates to a hydrogenation catalyst and a preparation process of 1,4-cyclohexanedimethanol, specifically a liquid-phase catalytic hydrogenation of 1,4-cyclohexanedicarboxylic acid to prepare 1,4-cyclohexane Catalyst and process for dimethanol. Background technique [0002] 1,4-Cyclohexanedimethanol is an important raw material for polyester production. The polyester resin produced by it instead of ethylene glycol or other polyols has good thermal stability and thermoplasticity, and can be used at higher temperatures Maintain stable physical and electrical properties, while products made from this type of resin have good chemical resistance and environmental adaptability. At present, the industrialized production of 1,4-cyclohexanedimethanol mainly uses dimethyl terephthalate as a raw material. The benzene ring is hydrogenated first to obtain dimethyl 1,4-cyclohexanedicarboxylate, and then through ester addition Hydrogen reaction produce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/62B01J35/10C07C31/27C07C29/149
Inventor 张晓鸥李明时沈俭一鲁墨弘
Owner CHANGZHOU UNIV
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