Catalyst for preparing 1, 4-cyclohexanedimethanol by catalyzing dimethyl terephthalate through one-step hydrogenation and preparation method of catalyst

A technology of dimethyl phthalate and cyclohexanedimethanol, which is applied in the field of catalyst preparation, can solve problems such as unfavorable energy resource consumption and complex process routes, and achieves avoidance of separation and solvent consumption, high product yield, and reduced The effect of consumption of energy resources

Inactive Publication Date: 2012-07-18
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Its disadvantage is that the process route is complex and requires a variety of reactors an

Method used

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  • Catalyst for preparing 1, 4-cyclohexanedimethanol by catalyzing dimethyl terephthalate through one-step hydrogenation and preparation method of catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0009] 0.13g RuCl 3 ·3H 2 O, 0.22g SnCl 2 2H 2 O and 0.096g H 2 PtCl 6 ·6H 2 Dissolve O in 2ml of deionized water, add 0.2ml of hydrochloric acid with a mass concentration of 35% until completely dissolved, then add 1g of Al with a particle size of 60-80 mesh 2 o 3 , aging at room temperature for 20 hours, drying in vacuum at 60°C for 12 hours, and then roasting in air at 450°C for 8 hours; then adding 20ml of water, adding 0.5g of sodium borohydride for reduction, after 2 hours until no obvious bubbles are released; finally in a nitrogen atmosphere at 70°C Dry in medium for 10h for later use.

[0010] The active components of the prepared catalyst, ruthenium, tin and platinum, were supported on the carrier Al 2 o 3 Above, wherein the mass percentage of ruthenium is 5%, the mass percentage of platinum is 3.2%, and the mass percentage of tin is 11.7%; the particle size of the catalyst is 60-80 mesh.

Embodiment 2

[0012] 0.13g RuCl 3 ·3H 2 O, 0.22g SnCl 2 2H 2 O and 0.13g H 2 PtCl 6 ·6H 2 Dissolve O in 2ml of deionized water, add 0.2ml of hydrochloric acid with a mass concentration of 35% until completely dissolved, then add 1g of Al with a particle size of 40-60 mesh 2 o 3 , aging at room temperature for 20 hours, drying in vacuum at 60°C for 12 hours, and then roasting in air at 450°C for 8 hours; then adding 20ml of water, adding 0.5g of sodium borohydride for reduction, after 2 hours until no obvious bubbles are released; finally in a nitrogen atmosphere at 70°C Dry in medium for 10h for later use.

[0013] The active components of the prepared catalyst, ruthenium, tin and platinum, were supported on the carrier Al 2 o 3 Above, the mass percentage of ruthenium is 5%, the mass percentage of platinum is 4.8%, and the mass percentage of tin is 11.7%; the particle size of the catalyst is 40-60 mesh.

Embodiment 3

[0015] 0.13g RuCl 3 ·3H 2 O, 0.22g SnCl 2 2H 2 O and 0.19g H 2 PtCl 6 ·6H 2 Dissolve O in 2ml of deionized water, add O.2ml of hydrochloric acid with a mass concentration of 35% until completely dissolved, then add 1g of Al with a particle size of 40-80 mesh 2 o 3 , aging at room temperature for 20 hours, drying in vacuum at 60°C for 12 hours, and then roasting in air at 450°C for 8 hours; then adding 20ml of water, adding 0.5g of sodium borohydride for reduction, after 2 hours until no obvious bubbles are released; finally in a nitrogen atmosphere at 70°C Dry in medium for 10h for later use.

[0016] The active components of the prepared catalyst, ruthenium, tin and platinum, were supported on the carrier Al 2 o 3 Above, the mass percentage of ruthenium is 5%, the mass percentage of platinum is 7.2%, and the mass percentage of tin is 11.7%; the particle size of the catalyst is 40-80 mesh.

[0017] The catalysts prepared in the above examples 1, 2, and 3 were applied...

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Abstract

The invention discloses a catalyst for preparing 1, 4-cyclohexanedimethanol by catalyzing dimethyl terephthalate through one-step hydrogenation and a preparation method of the catalyst, belonging to the technical field of catalyst preparation. The catalyst is a supported catalyst active ingredients of which are loaded on carriers Al2O3, wherein the active ingredients include three metals, namely, ruthenium, platinum and tin. The catalyst is prepared by adopting a co-impregnation method. According to the invention, the 1, 4-cyclohexanedimethanol is prepared by performing one-step hydrogenation on dimethyl terephthalate by only using a hydrogenation catalyst and a singe reaction solvent, and higher product yield is obtained; the separation of an intermediate product and the consumption of the solvent are avoided; and the consumption of energy and resources through the traditional process is reduced.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, in particular to a catalyst for catalyzing the one-step hydrogenation of dimethyl terephthalate to prepare 1,4-cyclohexanedimethanol and a preparation method thereof. Background technique [0002] 1,4-Cyclohexanedimethanol is a raw material monomer for the manufacture of polyester materials with excellent thermal stability and insulation, and has high industrial value. The current industrial production method of 1,4-cyclohexanedimethanol mainly uses dimethyl terephthalate as raw material to prepare 1,4-cyclohexane by hydrogenation of benzene ring and hydrogenation of ester group with two catalysts. dimethanol. Its disadvantage is that the process route is complex and requires a variety of reactors and reaction solvents, which is not conducive to reducing the consumption of energy resources. Contents of the invention [0003] The present invention aims at the present situation of ...

Claims

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Application Information

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IPC IPC(8): B01J23/62C07C35/14C07C29/19
Inventor 张法智孙志义陈加利
Owner BEIJING UNIV OF CHEM TECH
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