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Catalyst for synthesizing methoxy acetone through alcohol dehydrogenization, preparation method and application of catalyst

A technology of methoxyacetone and catalyst, which is applied in the field of catalyst and its preparation, can solve the problems of reducing the space-time efficiency of the catalyst and serious environmental pollution, and achieve the effects of low cost, low environmental pollution, and increased conversion rate of raw materials

Inactive Publication Date: 2015-03-11
XIAN MODERN CHEM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this preparation process needs to add water to the raw materials, which reduces the space-time efficiency of the catalyst. At the same time, the catalyst contains a large amount of metal chromium, which seriously pollutes the environment.

Method used

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  • Catalyst for synthesizing methoxy acetone through alcohol dehydrogenization, preparation method and application of catalyst
  • Catalyst for synthesizing methoxy acetone through alcohol dehydrogenization, preparation method and application of catalyst
  • Catalyst for synthesizing methoxy acetone through alcohol dehydrogenization, preparation method and application of catalyst

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] The preparation of embodiment 1 catalyst

[0011] Prepare a 1.5L deionized aqueous solution containing 181.2g of copper nitrate and 128.5g of zinc nitrate, as a mixed salt solution, dissolve 125.3g of sodium carbonate in 1.5L of deionized water as a precipitant, and dissolve 2.74g of sodium nitrate in 100ml of deionized water As a spray solution.

[0012] Add a small amount of deionized water to a four-necked flask, and when the water bath is heated to 85°C, under rapid stirring, add the above-mentioned mixed salt solution containing copper nitrate and zinc nitrate and the precipitant evenly into the four-necked flask , keep the temperature of the water bath at 85°C and the pH value of the suspension between 7.0 and 8.5, add it within about 1 hour, filter the precipitate after aging for 2 hours, wash it with deionized water, dry it at 120°C for 4 hours, and then dry it at 400°C Under roasting 4h. Take the matrix catalyst prepared above, add 5.8g of pseudo-boehmite to ...

Embodiment 2

[0014] Prepare a 1.5L deionized aqueous solution containing 151.0g copper nitrate and 165.3g zinc nitrate as a mixed salt solution, dissolve 125.1g sodium carbonate in 1.5L deionized water as a precipitant, and dissolve 2.74g sodium nitrate in 100ml deionized Spray solution in water.

[0015] Add a small amount of deionized water to a four-necked flask, and when the water bath is heated to 85°C, under rapid stirring, add the above-mentioned mixed salt solution containing copper nitrate and zinc nitrate and the precipitant evenly into the four-necked flask , keep the temperature of the water bath at 85°C and the pH value of the suspension between 7.0 and 8.5, add it within about 1 hour, filter the precipitate after aging for 2 hours, wash it with deionized water, dry it at 120°C for 4 hours, and then dry it at 400°C Under roasting 4h. Take the matrix catalyst prepared above, add 5.8g of pseudo-boehmite to it, mix them uniformly, put them into a rotating spray pot, spray sodium...

Embodiment 3

[0017] Prepare a 1.5L deionized aqueous solution containing 90.6g copper nitrate and 238.7g zinc nitrate as a mixed salt solution, dissolve 124.8g sodium carbonate in 1.5L deionized water as a precipitant, and dissolve 2.74g sodium nitrate in 100ml deionized Spray solution in water.

[0018] Add a small amount of deionized water to a four-necked flask, and when the water bath is heated to 85°C, under rapid stirring, add the above-mentioned mixed salt solution containing copper nitrate and zinc nitrate and the precipitant evenly into the four-necked flask , keep the temperature of the water bath at 85°C and the pH value of the suspension between 7.0 and 8.5, add it within about 1 hour, filter the precipitate after aging for 2 hours, wash it with deionized water, dry it at 120°C for 4 hours, and then dry it at 400°C Under roasting 4h. Take the matrix catalyst prepared above, add 5.8g of pseudo-boehmite to it, mix them uniformly, put them into a rotating spray pot, spray sodium ...

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Abstract

The invention discloses a catalyst for preparing methoxy acetone by dehydrogenizing 1-methoxy-2-propanol. The main body of the catalyst is Cu, Zn, Cr, Co or other metals; a modifier mainly comprises K, Na, Li, Mg and other metals; a binding agent is pseudoboehmite or carboxymethyl cellulose or the like; the reaction temperature is generally 240-280 DEG C; the liquid air speed per hour is 0.5-4 ml / g*h; the pressure of a carrier gas is 1-5 atmosphere pressures; the catalyst is high in conversion rate, good in selectivity, simple in preparation process, long in service life and easy to regenerate, and can meet requirements on industrial production.

Description

technical field [0001] The invention belongs to the field of fine chemical industry, and in particular relates to a catalyst for synthesizing methoxyacetone by catalytic dehydrogenation of 1-methoxy-2-propanol and a preparation method thereof. Background technique [0002] Methoxyacetone is an important fine chemical product. As an organic solvent, it has the advantages of low toxicity and high efficiency. It is also an important pesticide intermediate. It is mainly used as a raw material for the synthesis of metolachlor and some medicines. It can be widely used in the manufacture of various products such as paints, cleaning agents, and dyes. Chinese patent CN 1474798A discloses a preparation of methoxyacetone based on a mixture of 1-methoxy-2-propanol and at least 5% by weight of water as a raw material, using copper chromite as a dehydrogenation catalyst. However, this preparation process needs to add water to the raw materials, which reduces the space-time efficiency of ...

Claims

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Application Information

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IPC IPC(8): B01J23/80C07C49/175C07C45/51
Inventor 陈涛宁斌科武宗凯卫天琪李秉擘林双政杨建明
Owner XIAN MODERN CHEM RES INST