http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1008548-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_8b919a09598a02c07e8429b1441b76e1 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C10L1-103 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07F7-24 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C10L1-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07F7-24 |
| filingDate | 1962-10-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1965-10-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1008548-A |
| titleOfInvention | Tetra-alkyl lead redistribution reaction |
| abstract | A mixture of methyl and ethyl tetra-alkyl lead compounds is prepared by a redistribution reaction between the tetraalkyl lead derivatives by means of an aluminium-containing catalyst in the presence of a thermal stabilizer consisting of an alkane or mononuclear aromatic hydrocarbon having only aromatic unsaturation of boiling point 90-150 DEG C., together with one or both of a fused-ring aromatic hydrocarbon of 10-18 C atoms and ethylene dichloride, or propylene dichloride. Numerous alkanes, mononuclear aromatic and fused-ring aromatic hydrocarbons are listed and may be methyl and ethyl derivatives of butane, pentane, hexane, heptane, and octane as well as n-heptane, n- or iso-octane and n-nonane; toluene, ethylbenzene and xylenes; naphthalene, anthracene, chrysene, 1,2,3,4 - tetrahydronaphthalene, methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl and octyl derivatives of naphthalene, lower alkyl derivatives of anthracene or mixtures thereof. Tetraethyl lead in naphthalene, ethylene dichloride and ethylene dibromide may be added to tetramethyl lead in toluene, ethylene dichloride and ethylene dibromide. The catalyst may be anhydrous aluminium chloride or an aluminium alloy. A mixture of tetraalkyl lead compounds may also be prepared by reacting NaPb alloy with ethyl chloride and a methyl halide, e.g. CH3Cl and separating the tetraalkyl-lead product from the reaction mass by steam distillation in the presence of a thermal stabilizer as above. Other stabilizers such as styrene, hexachloropropylene, furfural, 2-ethyl-1,3-hexanediol, 2 - methyl - 2,4 - pentanediol and resorcinol may also be used. Specification 1,007,991 is referred to. |
| priorityDate | 1961-11-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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