http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-905998-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c7ad58d3c0b071069a8ee0cb8c8ba2e8 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B6-00 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B6-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F4-12 |
| filingDate | 1960-11-09^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1962-09-19^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-905998-A |
| titleOfInvention | Process for the production of alkali metal borohydrides |
| abstract | An alkali metal borohydride is produced by reacting an alkali metal hydride, or a mixture of an alkali metal and hydrogen, at a temperature between 50 DEG and 500 DEG C., preferably from 100 DEG to 200 DEG C., with boron trifluoride or an addition product thereof in the presence of a fluoroboric acid ester of the general formula FnB(OR)3-n, in which R is an aliphatic or aromatic hydrocarbon radical and n is 1 or 2, the ester being present in an amount of from 0,5 to 50% by weight, calculated on the alkali metal hydride. Preferred esters are those of difluoroboric acid, particularly the n-butyl ester, and other R radicals specified are methyl, ethyl, propyl, amyl, hexyl, octyl, decyl, dodecyl, phenyl and tolyl. Suitable BF3 addition products are those formed by addition of BF3 to ethers, e.g. diisopropyl ether, dimethyl ether and tetrahydrofuran, amines, e.g. triethylamine and pyridine, alkali metal (e.g. Na) fluorides, or alkali metal oxides, e.g. Na2O. An organic nitrogen base, e.g. triethylamine, pyridine, and dimethylcyclohexylamine, or an ether, e.g. tetrahydrofuran, diisopropyl ether, and dimethyl ethers of mono-, di-, tri-, or tetraethylene glycol, may be present as a cocatalyst. An inert dispersing agent may also be present, those specified being aliphatic hydrocarbons, e.g. paraffins boiling above 150 DEG C., and aromatic hydrocarbons, e.g. xylene, or mixtures thereof, and dimethyl ethers of mono-, di-, tri-, or tetraethylene glycol, these latter compounds serving both as dispersing agents and co-catalysts. The reaction may be carried out in an atmosphere of hydrogen at superatmospheric pressure. |
| priorityDate | 1959-11-12^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
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