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Method for producing glyoxylate through oxidation of glycollate

A technology of glycolic acid ester and glyoxylic acid ester, applied in chemical instruments and methods, preparation of carboxylate, preparation of organic compounds, etc., can solve the problems of low yield and high reaction temperature

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 that the prior art has the problem of high reaction temperature and low yield of glycolate oxidative dehydrogenation to glyoxylate, and a new method for producing glyoxylate by oxidation of glycolate is provided

Method used

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  • Method for producing glyoxylate through oxidation of glycollate

Examples

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Effect test

Embodiment 1

[0031] Prepare 200ml of ferric nitrate solution I containing 5.6% iron and stir, and the specific surface of 100g is 305m 2 / g alumina carrier was added to solution I and stirred evenly to obtain slurry II, and then ammonia water was added dropwise to slurry II under stirring, and the pH at the end point was controlled to be 8 to obtain slurry IV, which was aged at 80°C for 5 hours and then taken out The product was filtered, and the filter cake was washed with ethanol and deionized water, and dried at 120°C. Then prepare 50ml of potassium nitrate solution containing 2.3% potassium, impregnate and dry the filter cake, dry at 120°C, and roast at 500°C to obtain catalyst C1, take catalyst samples for X-fluorescence (XRF) determination of catalyst components, and specific surface BET characterization The test results are shown in Table 1.

Embodiment 2

[0033] Prepare 200ml solution I of ferric nitrate containing 12.8% iron according to the method of [Example 1] and stir, and the specific surface of 100g is 208m 2 / gβ-type molecular sieve carrier was added to solution I and stirred evenly to obtain slurry II, and then ammonia water was added dropwise to slurry II under stirring, and the pH at the end point was controlled to be 8 to obtain slurry IV, which was aged at 80°C for 5 hours and then taken out The product was filtered, and the filter cake was washed with ethanol and deionized water, and dried at 120°C. Then prepare 40ml of magnesium nitrate solution containing 4.8% magnesium, impregnate and dry the filter cake, dry at 120°C, and roast at 500°C to obtain catalyst C2. The catalyst samples are taken for cesium XRF and BET characterization tests. The test results are shown in Table 1.

Embodiment 3

[0035] According to the method of [Example 1], 200ml of solution I of iron nitrate containing 2.9% iron was prepared and stirred, and the specific surface of 100g was 325m 2 / g Y-type molecular sieve carrier was added to solution I and stirred evenly to obtain slurry II, and then ammonia water was added dropwise to slurry II under stirring, and the pH at the end point was controlled to be 8 to obtain slurry IV, which was aged at 80°C for 5 hours The product was taken out and filtered, and the filter cake was washed with ethanol and deionized water, and dried at 120°C. Then prepare 50ml of sodium nitrate solution containing 15.9% sodium, impregnate and dry the filter cake, dry at 120°C, and roast at 500°C to obtain catalyst C3. The catalyst samples were taken for XRF and BET characterization tests. The test results are shown in Table 1.

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Abstract

The invention relates to a method for producing glyoxylate through oxidation of glycollate. The invention mainly aims to overcome the problem of low yield of glyoxylate in the prior art. The method provided by the invention comprises a reaction step of contacting a nitrogen oxide and oxygen-containing gas with glycollate to produce glyoxylate. A catalyst used in the invention comprises the following components by weight: a) 0.5 to 30 parts of at least one active component selected from a group consisting of iron and iron oxides; b) 0 to 10 parts of an auxiliary agent which is at least one metal selected from a group consisting of group IA or group IIA elements or oxides thereof; and c) 70 to 99 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 oxidation of glycollate.

Description

technical field [0001] The invention relates to a method for oxidizing glycolic acid ester to generate glyoxylic 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 problems: first, ...

Claims

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Application Information

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IPC IPC(8): C07C67/313C07C69/67B01J23/78B01J29/14B01J29/72B01J23/745
CPCC07C67/313B01J23/745B01J23/78B01J29/146B01J29/7215B01J2229/18B01J35/613B01J35/615C07C69/716
Inventor 龚海燕刘俊涛刘国强
Owner CHINA PETROLEUM & CHEM CORP
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