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Method for producing glyoxylate through oxydehydrogenation of glycollate

A technology of glycolic acid ester and glyoxylic acid ester, which is applied in the direction of carboxylic acid ester preparation, chemical instruments and methods, metal/metal oxide/metal hydroxide catalyst, etc., and can solve the problem of oxidative dehydrogenation to produce glyoxylic acid ester issues of low sex

Active Publication Date: 2017-12-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is the low selectivity of glyoxylic acid ester produced by oxidative dehydrogenation of glycolic acid ester in the prior art, and a new method for producing glyoxylic acid ester by oxidative dehydrogenation of glycolic acid ester is provided

Method used

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  • Method for producing glyoxylate through oxydehydrogenation of glycollate
  • Method for producing glyoxylate through oxydehydrogenation of glycollate

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Prepare and stir 200ml solution I of ammonium molybdate and ammonium metavanadate containing 5.6% molybdenum and 1.4% vanadium, add 100g of alumina carrier to solution I and stir evenly to obtain slurry II, then mix 50ml iron-containing 6.6% ferric nitrate solution was slowly added dropwise to the slurry II, and then the pH was adjusted to 8 with nitric acid and ammonia water to obtain the slurry IV; after aging the slurry IV at 80°C for 8 hours, vacuum-evaporated to dryness at 90°C, and then roasted at 500°C The catalyst C1A was obtained, and the catalyst sample was taken for X-fluorescence (XRF) characterization test to determine the catalyst components. The results are shown in Table 1.

Embodiment 2

[0030] Prepare and stir 200ml solution I of ammonium molybdate and ammonium metavanadate containing 2.7% molybdenum and 1.4% vanadium, add 100g of alumina carrier to solution I and stir evenly to obtain slurry II, and then mix 50ml iron-containing 6.6% ferric nitrate solution was slowly added dropwise to the slurry II, and then the pH was adjusted to 8 with nitric acid and ammonia water to obtain the slurry IV; after aging the slurry IV at 80°C for 8 hours, vacuum-evaporated to dryness at 90°C, and then roasted at 500°C Catalyst C2A was obtained, and the catalyst sample was taken for XRF characterization test. The test results are shown in Table 1.

Embodiment 3

[0032] Prepare and stir 200ml solution I of ammonium molybdate and ammonium metavanadate containing 0.1% molybdenum and 0.05% vanadium, add 100g of alumina carrier into solution I and stir evenly to obtain slurry II, and then mix 50ml iron-containing 6.6% ferric nitrate solution was slowly added dropwise to the slurry II, and then the pH was adjusted to 8 with nitric acid and ammonia water to obtain the slurry IV; after aging the slurry IV at 80°C for 8 hours, vacuum-evaporated to dryness at 90°C, and then roasted at 500°C Catalyst C3A was obtained, and a catalyst sample was taken for XRF characterization test. The test results are shown in Table 1.

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Abstract

The invention relates to a method for producing glyoxylate through oxydehydrogenation of glycollate. The invention mainly aims to overcome the problem of low selectivity of glyoxylate in the prior art. The method provided by the invention comprises a reaction step of contacting oxygen-containing gas with glycollate in the presence of a catalyst to produce glyoxylate. The catalyst comprises the following components by weight: a) 0.3 to 20 parts of a mixture of molybdenum and vanadium; b) 0.05 to 15 parts of at least one selected from a group consisting of copper, palladium, manganese, nickel, cerium, bismuth, potassium, lanthanum, magnesium, tin, iron, calcium and cobalt; and c) 65 to 99.8 parts of a carrier. With such a technical scheme, the above problem is overcome, and the method is applicable to industrial production of glyoxylate through oxydehydrogenation of glycollate.

Description

technical field [0001] The invention relates to a method for preparing glyoxylate by oxidative dehydrogenation of glycolic acid ester. Background technique [0002] Glyoxylate has both the chemical properties of aldehyde and ester, and can undergo various reactions, especially glyoxylic acid can be prepared by hydrolysis. Glyoxylic acid is an organic intermediate for the synthesis of spices, medicine, food, varnish raw materials, dyes, plastic additives, etc. It can be used to produce oral penicillin, vanillin, mandelic acid and allantoin, etc. Consumption has also been on the rise. [0003] The production methods of glyoxylic acid are different according to the starting materials, and there are about a dozen kinds at present. The most commonly used in industry are oxalic acid electrolytic reduction method, glyoxal nitric acid oxidation method, maleic acid (anhydride) ozonation method, etc. At present, the domestic glyoxylic acid industry has encountered two major problem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C67/313C07C69/67B01J23/887B01J23/652B01J23/34B01J29/78B01J23/28
CPCB01J23/28B01J23/34B01J23/6525B01J23/8877B01J29/78B01J2229/18C07C67/313C07C69/67
Inventor 龚海燕张旭宋海峰
Owner CHINA PETROLEUM & CHEM CORP
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