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Catalyst for synthesizing methyl glycolate by formaldehyde and methyl formate and preparation method and application thereof

A technology of methyl glycolate and methyl formate, used in the preparation of carboxylate, the preparation of organic compounds, catalysts for physical/chemical processes, etc.

Active Publication Date: 2013-03-13
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the reaction is mainly a liquid phase reaction, and the current liquid acid catalytic system still has the problems of low catalytic efficiency, severe corrosion, and difficulty in recycling.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Weigh the required water glass and aluminum nitrate according to the final catalyst content (silicon oxide accounts for 30%; aluminum oxide accounts for 40%), and make them into 0.1mol / L and 0.5mol / L aqueous solutions. 0.1 mol / L aqueous ammonia solution was added dropwise into the reaction kettle with constant temperature stirring at the same time, the reaction temperature was controlled at 40°C, and the pH value was controlled at 6. After the precipitation is completed, the precipitate is aged in the mother liquor for 2 hours, washed, and deionized water is added for beating. Weigh ferric nitrate (Fe(NO 3 ) 3 9H 2 O) Prepare a 0.1mol / L aqueous solution, use 0.1mol / L sodium carbonate aqueous solution as a precipitant, co-precipitate in the above slurry, control the reaction temperature to 40°C, and control the pH value to 12. After the precipitation is completed, the precipitate is aged in the mother liquor for 2 hours, washed and filtered. Dry at 100°C for 2h and c...

Embodiment 2

[0031] According to the final catalyst content (silicon oxide accounts for 20%; aluminum oxide accounts for 70%), weigh the required tetraethyl orthosilicate and aluminum isopropoxide respectively, and make them into 0.5mol / L and 0.1mol / L aqueous solutions , the two solutions and 2.0mol / L aqueous sodium hydroxide solution were added dropwise into a reactor with constant temperature stirring at the same time, the reaction temperature was controlled at 80°C, and the pH value was controlled at 12. After the precipitation is completed, the precipitate is aged in the mother liquor for 12 hours, washed, and deionized water is added for beating. Weigh cobalt nitrate (Co(NO 3 ) 2 ·6H 2 O) Prepare a 0.1mol / L aqueous solution, use 2.0mol / L ammonium carbonate aqueous solution as a precipitant, co-precipitate in the above slurry, control the reaction temperature at 80°C, and control the pH value at 10. After the precipitation is completed, the precipitate is aged in the mother liquor f...

Embodiment 3

[0034] According to the final catalyst content (silicon oxide accounts for 25%; aluminum oxide accounts for 50%), weigh the required water glass and aluminum acetate respectively, and make them into 0.2mol / L aqueous solution respectively, and mix the two solutions with 0.5mol / L carbonic acid The sodium aqueous solution was simultaneously added dropwise into the reactor with constant temperature stirring, the reaction temperature was controlled at 70°C, and the pH value was controlled at 8. After the precipitation is completed, the precipitate is aged in the mother liquor for 6 hours, washed, and deionized water is added for beating. Weigh nickel nitrate (NiCl 2 ·6H 2 O) Prepare a 0.3mol / L aqueous solution, use 0.5mol / L ammonium bicarbonate aqueous solution as the precipitant, co-precipitate in the above slurry, control the reaction temperature at 60°C, and control the pH value at 10. After the precipitation is completed, the precipitate is aged in the mother liquor for 6 hou...

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PUM

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Abstract

A catalyst for synthesizing methyl glycolate by formaldehyde and methyl formate uses an aluminum oxide and silicon oxide composite solid acid as an active component, and a VIII group non-noble metal oxide as an active coagent, wherein aluminum oxide accounts for 40-70wt%, silicon oxide accounts for 20-30wt% and the VIII group non-noble metal oxide accounts for 10-30wt%. The catalyst provided by the invention is suitable for a fixed bed reactor and has the advantages of high activity and high selectivity.

Description

technical field [0001] The invention relates to a catalyst for producing methyl glycolate by reacting formaldehyde and methyl formate, a preparation method and application thereof. Background technique [0002] Ethylene glycol is an important bulk organic chemical raw material, mainly used in the production of polyester fiber, PET polyester film, PET packaging resin, other polyesters, antifreeze, etc. Although the production capacity and output of ethylene glycol in my country have grown rapidly in recent years, due to the strong demand of polyester and other industries, the domestic demand for ethylene glycol is strong, and a large number of imports are relied on. [0003] The production process route of ethylene glycol is mainly the petroleum route method (all naphtha raw material method), that is, ethylene oxide is obtained by oxidation of ethylene cracked from petroleum, and ethylene glycol is obtained by hydration of ethylene oxide. In order to improve the conversion r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745B01J23/75B01J23/755C07C69/675C07C67/343
Inventor 李德宝贾丽涛陈从标肖勇侯博马占骋
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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