Hydrogenolysis catalyst, preparation method and application of hydrogenolysis catalyst in preparation of isopropyl benzene by hydrogenolysis of alpha, alpha-dimethyl benzyl alcohol

A technology of dimethyl benzyl alcohol and catalyst, which is applied in the field of catalysis, can solve the problems of decreased activity and loss of active components, and achieve the effects of increasing hardness, improving dispersion, and saving preparation steps

Active Publication Date: 2021-03-05
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The hydrogenolysis catalyst prepared by the present invention can be applied to the hydrogenolysis of α,α-dimethylbenzyl alcohol to produce cumene, effectively solving the problem of the loss of active components of the catalyst during the long-term operation of the hydrogenolysis of α,α-dimethylbenzyl alcohol. drop problem, and suppress the formation of reaction by-products while improving the liquid resistance of the catalyst

Method used

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  • Hydrogenolysis catalyst, preparation method and application of hydrogenolysis catalyst in preparation of isopropyl benzene by hydrogenolysis of alpha, alpha-dimethyl benzyl alcohol
  • Hydrogenolysis catalyst, preparation method and application of hydrogenolysis catalyst in preparation of isopropyl benzene by hydrogenolysis of alpha, alpha-dimethyl benzyl alcohol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] A kind of preparation method of hydrogenolysis catalyst, the steps are:

[0057] 1) First weigh 70.6g of pseudo-boehmite, 12.5g of coconut shell charcoal and 3.0g of safflower powder and carry out dry mixing in a mixer, the motor speed is 15r / min, the dry mixing time is 30min, and then 26g Ionized water, 69.3g sodium silicate aqueous solution (solid content 40wt%, modulus is about 2.7), 0.87g yttrium chloride and 2.5g palladium chloride ammonia solution (palladium element mass concentration is 20wt%) mix, and this solution Add it into a kneader for kneading, the kneading time is 20min, and the motor speed is 15r / min, to obtain a wet dough.

[0058] 3) Put the wet dough in step 2) into a twin-screw extruder for extrusion molding. The extrusion conditions are room temperature, the extrusion pressure is 70N, the extrusion rate is 20rpm, and the extrusion abrasive is cylindrical, with a diameter of 2mm ;

[0059] 4) The strip-shaped wet base body obtained in step 3) was q...

Embodiment 2

[0062] A kind of preparation method of hydrogenolysis catalyst, the steps are:

[0063] 1) First weigh 70.6g of SB powder, 10.0g of coconut shell charcoal and 3g of turnip powder in a mixer for dry mixing, the motor speed is 15r / min, and the dry mixing time is 30min, then 20g of deionized water, 69.4 G sodium silicate aqueous solution (solid content 40wt%, modulus is about 2.7), 1.69g yttrium nitrate and 15g palladium chloride ammonia solution (palladium element mass concentration is 20wt%) are mixed, and this solution is added in the kneader and kneaded , the kneading time is 20min, the motor speed is 15r / min, and the wet dough is obtained.

[0064] 3) Put the wet dough in step 2) into a twin-screw extruder for extrusion molding. The extrusion conditions are room temperature, extrusion pressure 80N, extrusion rate 20rpm, extrusion abrasive is cylindrical, diameter 2mm ;

[0065] 4) The strip-shaped wet base body obtained in step 3) was quickly dried in a drying oven at 80°C...

Embodiment 3

[0068] A kind of preparation method of hydrogenolysis catalyst, the steps are:

[0069] 1) First weigh 35.3g of pseudo-boehmite, 27.0g of coconut shell charcoal and 3g of safflower powder and dry mix them in a mixer, the motor speed is 15r / min, the dry mixing time is 30min, and then 22g of deionized Water, 5.2g yttrium chloride and 97.1g sodium silicate aqueous solution (solid content 40wt%, modulus is about 2.7) are mixed with the ammonia solution of 15g palladium chloride (the mass concentration of palladium element is 20wt%), this solution is added and kneaded Carry out kneading in the machine, the kneading time is 20min, the motor speed is 15r / min, and the wet dough is obtained.

[0070] 3) Put the wet dough in step 2) into a twin-screw extruder for extrusion molding. The extrusion conditions are room temperature, the extrusion pressure is 70N, the extrusion rate is 20rpm, and the extrusion abrasive is cylindrical, with a diameter of 2mm ;

[0071] 4) The strip-shaped we...

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Abstract

The invention provides a hydrogenolysis catalyst, a preparation method and application of the hydrogenolysis catalyst in preparation of isopropyl benzene by hydrogenolysis of alpha, alpha-dimethyl benzyl alcohol, mainly solves the problems that: the activity of a catalyst is reduced due to loss of active components in long-period operation of hydrogenolysis of alpha, alpha-dimethyl benzyl alcohol,inhibits generation of reaction by-products, and improves the liquid resistance of the catalyst. The hydrogenolysis catalyst disclosed by the invention comprises the components of Pd, Y2O3, Na2O andSiO2-Al2O3-activated carbon, so that the problems are better solved, and the hydrogenolysis catalyst can be applied to industrial production of preparing isopropyl benzene by hydrogenolysis of alpha,alpha-dimethyl benzyl alcohol.

Description

technical field [0001] The invention belongs to the technical field of catalysis, and in particular relates to a hydrogenolysis catalyst, a preparation method and its application in hydrogenolysis of α,α-dimethylbenzyl alcohol to produce cumene. Background technique [0002] Propylene oxide (PO) is an important organic chemical intermediate, mainly used in the production of raw materials for polyurethane - polyether polyol. At present, the industrial production of PO mainly includes chlorohydrin method, co-oxidation method (PO / styrene monomer method, PO / tert-butanol method, PO / methyl tert-butyl ether method), and cumene hydroperoxide method. (CHP method) and hydrogen peroxide oxidation method (HPPO method). The new PO production process developed by Japan's Sumitomo Chemical (Sumitomo) includes three processes: cumene oxidation, propylene epoxidation and α, α-dimethylbenzyl alcohol hydrogenolysis. The process has high conversion rate and high selectivity, and the product i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/18B01J23/63B01J37/02C07C1/20C07C15/085
CPCB01J23/63B01J37/0213B01J35/0066B01J35/002B01J21/18C07C1/20C07C2523/63C07C15/085Y02P20/52
Inventor 沙宇詹吉山李作金于海波燕宸孙康初乃波黎源
Owner WANHUA CHEM GRP CO LTD
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