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Catalyst for synthetic reaction of 1-methoxy-2-acetone and preparation method thereof

A methoxyl catalyst technology, applied in the field of catalyst and its preparation, to achieve the effect of high specific surface area and high dehydrogenation activity

Inactive Publication Date: 2018-03-13
CHINA CATALYST HLDG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve the deficiencies and defects in the existing process technology, to provide a reaction process that does not require additional oxidant, the product 1-methoxy-2-acetone has high selectivity, long catalyst life, and is suitable for industrial continuous production. Catalyst for chemically producing 1-methoxyl-2-propanone reaction and preparation method thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Mix 100g ethyl orthosilicate, 80g ethanol, 200g deionized water and 20.0g copper nitrate trihydrate evenly at 25°C, stir vigorously for 10 hours; dissolve 11.11g magnesium nitrate hexahydrate in 100g deionized water and add dropwise into the above mixture, and aged at 50°C for 18 hours to form a gel, dried at 100°C for 16 hours, calcined at 450°C for 6 hours, and then reduced in a hydrogen atmosphere at 220°C for 6 hours to obtain a dehydrogenation catalyst. It is sample Y-1.

[0029] The catalyst active components are copper: 15wt%; magnesium: 3wt%.

Embodiment 2

[0031] Mix 100g of tetraethyl orthosilicate, 80g of ethanol, 200g of deionized water and 20.0g of copper nitrate trihydrate at 35°C and stir vigorously for 7 hours; dissolve 2.9g of calcium chloride in 100g of deionized water and add dropwise to The above mixture was aged at 40°C for 24 hours to form a gel, dried at 100°C for 16 hours, calcined at 450°C for 6 hours, and then reduced in a hydrogen atmosphere at 220°C for 6 hours to obtain a dehydrogenation catalyst, denoted as Sample Y-2.

[0032] The catalyst active components are copper: 15.2wt%; calcium: 1.0wt%.

Embodiment 3

[0034] Mix 100g ethyl orthosilicate, 80g ethanol, 200g deionized water and 20.0g copper nitrate trihydrate evenly at 35°C, stir vigorously for 7 hours; dissolve 2.59g anhydrous sodium nitrate in 100g deionized water and add dropwise to The above mixture was aged at 50°C for 18 hours to form a gel, dried at 120°C for 12 hours, calcined at 450°C for 6 hours, and then reduced in a hydrogen atmosphere at 220°C for 6 hours to obtain a dehydrogenation catalyst, which was designated as sample Y-3.

[0035] The catalyst active components are copper: 15.1wt%; sodium: 2.0wt%.

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Abstract

The invention discloses a catalyst for synthetic reaction of 1-methoxy-2-acetone and a preparation method thereof. The catalyst is prepared by means of a sol-gel process from a main active component,metallic copper element accounting for 15-30% by mass of the catalyst, an auxiliary active component, IA or IIA metallic element accounting for 1-6% by mass of the catalyst, and the balance, a silicondioxide support. The catalyst prepared via the method o the invention has high catalytic activity, good selectivity, long catalyst life, capability of being suitable for industrial continuous production and the like. 1-Methoxy-2-propanol is subjected to direct dehydrogenation reaction under the reaction temperature of 230-270 DEG C, reaction pressure of normal pressure and mass space velocity of1-4 h<-1> to generate 1-methoxy-2-acetone, material conversion rate may reach 70% and above, and 1-methoxy-2-acetone selectivity may reach 98% and above.

Description

technical field [0001] The invention relates to a catalyst in the synthesis reaction of 1-methoxy-2-propanone and a preparation method thereof, belonging to the field of chemical catalysis. Background technique [0002] 1-Methoxy-2-propanone is an important fine chemical product, mainly used as a synthetic raw material for the pesticide metolachlor and some medicines. As a low-toxic herbicide, metolachlor has been widely used in northern China of dry fields. As one of the important raw materials for the production of metolachlor, 1-methoxy-2-propanone has a broad market space. [0003] U.S. Patent US 3462495 discloses that a mixture of 1-methoxy-2-propanol and water enters the reactor after preheating, and the phosphate catalyst of loading Ca-Ni in the reactor, under certain conditions, 1-methoxy The conversion rate of -2-propanol is 55%, but this catalyst is very easy to deactivate and needs to be regenerated every hour. [0004] Patent CN 01131292.0 discloses a method f...

Claims

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Application Information

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IPC IPC(8): B01J23/72B01J23/78C07C45/00C07C49/175
CPCB01J23/78B01J37/036B01J37/038B01J37/08B01J37/18C07C45/002C07C49/175
Inventor 王建青李进王炳春孙心鹏王庆吉
Owner CHINA CATALYST HLDG CO LTD
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