ES2020475A6 - Method for producing glyoxylic acid by electroreduction with cathodic reactivation of oxalic acid - Google Patents
Method for producing glyoxylic acid by electroreduction with cathodic reactivation of oxalic acidInfo
- Publication number
- ES2020475A6 ES2020475A6 ES9001621A ES9001621A ES2020475A6 ES 2020475 A6 ES2020475 A6 ES 2020475A6 ES 9001621 A ES9001621 A ES 9001621A ES 9001621 A ES9001621 A ES 9001621A ES 2020475 A6 ES2020475 A6 ES 2020475A6
- Authority
- ES
- Spain
- Prior art keywords
- acid
- cathodic
- electroreduction
- reactivation
- oxalic acid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B3/00—Electrolytic production of organic compounds
- C25B3/20—Processes
- C25B3/25—Reduction
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Method for producing glyoxylic acid by electroreduction, with cathodic reactivation, of oxalic acid in a divided eletrolytic cell comprised of an anodic compartment formed of an anode and an aqueous solution of a strong mineral acid as anolite and of a cathodic compartment formed of a lead cathod and an aqueous solution saturated with oxalic acid, the two compartments being separated by a cationic exchange membrane. The method comprises the addition of Pb(II) salts to the catholite or to the anolite in order to keep at high and constant levels throughout the operation both the current efficiency and the selectivity of the process. The effect of Pb (II) salts may be potentiated by washing the cathode with nitric acid. The glyoxylic acid is an intermediary in the industrial synthesis of p-hydroxyphenylglycine and vanillin, inter alia.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES9001621A ES2020475A6 (en) | 1990-06-12 | 1990-06-12 | Method for producing glyoxylic acid by electroreduction with cathodic reactivation of oxalic acid |
AU79652/91A AU7965291A (en) | 1990-06-12 | 1991-06-11 | Method for producing glyoxylic acid by electroreduction with cathodic reactivation of oxalic acid |
PCT/ES1991/000035 WO1991019832A1 (en) | 1990-06-12 | 1991-06-11 | Method for producing glyoxylic acid by electroreduction with cathodic reactivation of oxalic acid |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES9001621A ES2020475A6 (en) | 1990-06-12 | 1990-06-12 | Method for producing glyoxylic acid by electroreduction with cathodic reactivation of oxalic acid |
Publications (1)
Publication Number | Publication Date |
---|---|
ES2020475A6 true ES2020475A6 (en) | 1991-08-01 |
Family
ID=8267720
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES9001621A Expired - Lifetime ES2020475A6 (en) | 1990-06-12 | 1990-06-12 | Method for producing glyoxylic acid by electroreduction with cathodic reactivation of oxalic acid |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU7965291A (en) |
ES (1) | ES2020475A6 (en) |
WO (1) | WO1991019832A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ATE138425T1 (en) * | 1992-02-22 | 1996-06-15 | Hoechst Ag | ELECTROCHEMICAL PROCESS FOR PRODUCING GLYOXYLIC ACID |
DE4217338C2 (en) * | 1992-05-26 | 1994-09-01 | Hoechst Ag | Electrochemical process for the reduction of oxalic acid to glyoxylic acid |
-
1990
- 1990-06-12 ES ES9001621A patent/ES2020475A6/en not_active Expired - Lifetime
-
1991
- 1991-06-11 WO PCT/ES1991/000035 patent/WO1991019832A1/en active Application Filing
- 1991-06-11 AU AU79652/91A patent/AU7965291A/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
WO1991019832A1 (en) | 1991-12-26 |
AU7965291A (en) | 1992-01-07 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CA2048815A1 (en) | Process for producing sodium hydroxide and ammonium sulphate from sodium sulphate | |
US4767870A (en) | Method of purifying L-ascorbic acid | |
RU94045266A (en) | Method of nitrate electrochemical reduction | |
HU210311B (en) | Process for producing of aqueous solution of sodium hydroxide | |
DE3265347D1 (en) | Membrane cell brine feed | |
ES8102599A1 (en) | Process and apparatus for the regeneration of chromic acid baths | |
US3969207A (en) | Method for the cyclic electrochemical processing of sulfuric acid-containing pickle waste liquors | |
ES2020475A6 (en) | Method for producing glyoxylic acid by electroreduction with cathodic reactivation of oxalic acid | |
JPS55161080A (en) | Manufacture of glycols | |
BR0114918A (en) | Process for improving the purity of quaternary ammonium hydroxide compounds by electrolysis | |
US3755100A (en) | Method for producing acrylamide from acrylonitrile | |
ES521970A0 (en) | ELECTROLYTIC PROCEDURE FOR THE PURIFICATION OF CONTAMINATED CAUSTIC SOLUTIONS. | |
US4566956A (en) | Electrochemical conversion of soluble salts of insoluble acids to their acid form | |
ES2000869A6 (en) | Production of acid type aminocarboxylic acid | |
ES354605A1 (en) | Electrolytic hydrodimerisation process | |
ES2002301A6 (en) | Process for the electrochemical oxidation of alkylpyridines. | |
RU2001106494A (en) | METHOD FOR ELECTROCHEMICAL PRODUCTION OF ARSENIC HYDROGEN | |
JPS5798684A (en) | Electrolytic production of cysteine having high purity | |
SU1421807A1 (en) | Electrolyzer for regeneration of sulfuric acid etching solutions | |
JPS5499797A (en) | Electrolyzing method for aqueous solution of alkali metal salt | |
SU132214A1 (en) | Adipic acid dinitrile electrochemical reduction method | |
JPS5655577A (en) | Electrolyzing method for alkali metal halide | |
US3325381A (en) | Electrolytic process for producing dihydroxycapronitrile | |
JPS6487796A (en) | Production of quaternary ammonium hydroxide | |
JPS58755B2 (en) | Amino acid production method |