GB1203108A - Production of cyclohexadiene dicarboxylic acids - Google Patents
Production of cyclohexadiene dicarboxylic acidsInfo
- Publication number
- GB1203108A GB1203108A GB0413/68A GB141368A GB1203108A GB 1203108 A GB1203108 A GB 1203108A GB 0413/68 A GB0413/68 A GB 0413/68A GB 141368 A GB141368 A GB 141368A GB 1203108 A GB1203108 A GB 1203108A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lead
- cathode
- cyclohexadiene
- acid
- water
- 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
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/347—Preparation of carboxylic acids or their salts, halides or anhydrides by reactions not involving formation of carboxyl groups
- C07C51/36—Preparation of carboxylic acids or their salts, halides or anhydrides by reactions not involving formation of carboxyl groups by hydrogenation of carbon-to-carbon unsaturated bonds
-
- 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
-
- 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
- C25B3/29—Coupling reactions
- C25B3/295—Coupling reactions hydrodimerisation
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
1,203,108. Cyclohexadiene dicarboxylic acids. BADISCHE ANILIN- & SODA-FABRIK A.G. 10 Jan., 1968 [11 Jan., 1967], No. 1413/68. Heading C2C. [Also in Division C7] 3,5 - Cyclohexadiene - 1,2 - dicarboxylic acid and 2,5-cyclohexadiene-1,4-dicarboxylic acid are produced by electrochemical hydrogenation of o-phthalic acid and terephthalic acid respectively in dilute aqueous sulphuric acid at a temperature up to 80 C. and at a current density of 1-40 amps per sq. decimetre at the cathode, there being added to the catholyte an ether, amide and/or nitrile which is miscible with water, is inert under the reaction conditions and is liquid at room temperature. The organic solvents which may be used are saturated cyclic ethers, e.g. dioxane, or tetrahydrofuran; monoethers or diethers of ethylene glycol or 1,2- propylene glycol; alkyl radicals of ether groups such as ethylene glycol monomethyl ether.; N- monoalkyl substituted and N,N-dialkyl substituted amides of aliphatic monocarboxylic acids such as methyl formamide, N-methylacetamide, N-ethylacetamide, dimethyl formamide, diethyformamide or N,N-dimethylacetamide and other N,N-dialkylacetamides, N,N-dimethylpropionamide; N-alkyl substituted laotams such as N-methylpyrrolidone, N-ethylpyrrolidone or N-methylpiperidone; formamide; or nitriles such as acetonitrile. As anolyte an aqueous solution of sulphuric acid may be used. The anodes used may be formed of lead, lead dioxide, platinum, graphite, silicon carbide or magnetic materials, and the cathodes used may be of lead, amalgamated lead, cadmium, tin, thallium, bismuth or alloys of at least two of the metals lead, mercury, silver, cadmium, tin, thallium and bismuth. The cell used may be formed of glass, metal or plastics. The diapragm separating analyte and catholyte may comprise an ion exchange membrane, plastics fabric or ceramic materials, e.g. porous clay. One form of cell comprises a double-walled glass tube which is cooled with water, a cylindrical lead cathode in contact with the inner wall of the glass tube, a cylindrical clay diaphragm positioned within the cathode and separating cathode from anode, and an anode comprising a lead tube cooled by water.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEB0090689 | 1967-01-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1203108A true GB1203108A (en) | 1970-08-26 |
Family
ID=6985419
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB0413/68A Expired GB1203108A (en) | 1967-01-11 | 1968-01-10 | Production of cyclohexadiene dicarboxylic acids |
Country Status (6)
Country | Link |
---|---|
AT (1) | AT276350B (en) |
BE (1) | BE709115A (en) |
DE (1) | DE1618078B1 (en) |
FR (1) | FR1559752A (en) |
GB (1) | GB1203108A (en) |
NL (1) | NL6800367A (en) |
-
1967
- 1967-01-11 DE DE19671618078 patent/DE1618078B1/en not_active Ceased
-
1968
- 1968-01-04 FR FR1559752D patent/FR1559752A/fr not_active Expired
- 1968-01-09 BE BE709115D patent/BE709115A/xx unknown
- 1968-01-10 NL NL6800367A patent/NL6800367A/xx unknown
- 1968-01-10 GB GB0413/68A patent/GB1203108A/en not_active Expired
- 1968-01-11 AT AT28768A patent/AT276350B/en active
Also Published As
Publication number | Publication date |
---|---|
AT276350B (en) | 1969-11-25 |
DE1618078B1 (en) | 1971-02-04 |
BE709115A (en) | 1968-07-09 |
FR1559752A (en) | 1969-03-14 |
NL6800367A (en) | 1968-07-12 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3361653A (en) | Organic electrolytic reactions | |
GB1250212A (en) | ||
CN102719845A (en) | Method and device for preparing tin methane sulfonate through hydrogen-free electrolysis | |
US3511765A (en) | Carrying out electrochemical reactions | |
US3642592A (en) | Production of adiponitrile | |
US1543357A (en) | Process for the recovery of hydrogen and oxygen by electrolysis | |
GB1203108A (en) | Production of cyclohexadiene dicarboxylic acids | |
Vertes et al. | A new method for the electrochemical oxidation of alcohols | |
US3779876A (en) | Process for the preparation of glyoxylic acid | |
US3833490A (en) | Process for the preparation of 3,5-diiodo-4-hydroxybenzonitrile or 3-iodo-4-hydroxy-5-nitro-benzonitrile | |
Wilson et al. | Electrolytic Reduction of Organic Compounds: VI. Aminophenols from Nitrocompounds | |
US2589635A (en) | Electrochemical process | |
US3477923A (en) | Electrochemical hydrodimerization of acrylonitrile | |
Willard et al. | The electrolytic oxidation of iodine and of iodic acid | |
US3542656A (en) | Production of cyclohexadiene dicarboxylic acids | |
Ramaswamy et al. | Improvement in the Electrolytic Preparation of lodoform | |
US3969200A (en) | Manufacture of propiolic acid | |
JPS552765A (en) | Production of hydrogen sulfide by electrolysis | |
FR2219806A1 (en) | Diaphragm cell for chromic-sulphuric acid prodn. - with membrane near cathode and high anode-cathode surface ratio | |
SU129192A1 (en) | The method of cleaning solutions of caustic soda | |
SU582331A1 (en) | Electrochemical method of obtaining silver oxide | |
SU744054A1 (en) | Method of preparing cuprous bromide | |
US3109790A (en) | Method of preparing phosphine | |
Hlavatý et al. | Anodic oxidation of o-toluenesulphonamide to saccharine on a NiO (OH)-coated nickel anode | |
SU132214A1 (en) | Adipic acid dinitrile electrochemical reduction method |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |