http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-404983-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_7b04f5b6a02051c94d6eaf190b751ed2 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-245 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-245 |
| filingDate | 1932-07-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1934-01-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-404983-A |
| titleOfInvention | Improvements in the manufacture and production of acetic acid |
| abstract | Acetic acid is made by treating acetone or methylethyl ketone p in the liquid phase with oxygen or a gas containing oxygen in the presence of an oxidation catalyst. Suitable catalysts are metals having more than one valency and an atomic weight between about 50 and 200, e.g. vanadium, chromium, manganese, iron, cobalt, nickel, copper, molybdenum, cerium and other rare earth metals, tungsten, platinum, iridium, osmium and gold; the metals may be used as such or as oxides, carbonates, chlorides, sulphates, carboxylates such as formates, acetates, propionates, stearates, oleates, or tartrates, and enolates such as acetylacetonates; mixtures of catalysts may also be used, e.g. mixtures of cobalt and manganese acetates and/or acetylacetonates. The reaction may be effected in the presence of a solvent; specified solvents are formic, acetic and propionic acids and their methyl and ethyl esters, and halogenated hydrocarbons such as carbon tetrachloride and chlorobenzene; acetic or formic acid is the preferred solvent; when another solvent or no solvent is used, a little acetic, formic or propionic acid is preferably added, to start the reaction. The reaction temperature may be between 50 and 120 DEG C., and the pressure may be atmospheric or a raised pressure up to about 20 atm. The reaction vessel may be made of ceramic material, glass, chrome-nickel steel, or nickel alloys free from iron, and may be packed with the same materials. The used gas from the reaction vessel may contain a little acetaldehyde, which may be separated. The process may form a step in the manufacture of acetic acid from hydrocarbons such as propane, butane, ethane, propylene, butylene, and ethylene; thus, propane may be converted into acetone via propylene and isopropyl alcohol; butane may be converted into methylethyl ketone via butylene and secondary butyl alcohol; ethylene may be converted into butylene, as described in Specification 326,322, [Class 2 (iii), Dyes &c.], and then into methylethyl ketone as described above. In the examples: (1) methylethyl ketone is treated with finely divided oxygen at 80--100 DEG C. in the presence of acetic acid and manganese acetate; (2) oxygen containing vaporized methylethyl ketone is led into acetic acid containing manganese and copper acetates and heated to 100--103 DEG C.; (3) oxygen containing acetone vapour is led into acetic acid containing manganese acetate and heated to 78--84 DEG C.; (4) acetone is treated with air at 75 DEG C. and 3--4 atm. pressure in the presence of acetic acid and cobalt and manganese acetylacetonates; acetic acid is produced in all the examples, and formic acid is also obtained in examples 3 and 4. |
| priorityDate | 1932-07-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 78.