http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-889285-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_cab52e15e149d28af8f65d84a58daeca |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07F7-20 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07F7-20 |
| filingDate | 1959-10-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1962-02-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-889285-A |
| titleOfInvention | Chlorosilane purification |
| abstract | Triorganomonochloro- and diorganodichlorosilanes are separated from mixtures containing primarily diorganodichlorosilanes, some triorganochlorosilane and other polyfunctional silanes of the formula RnHmSiCl4-m-n where R is a monovalent hydrocarbon or halogenated hydrocarbon radical and m, n and m+n each are from 1 to 3, by contacting the mixture with (1) at least one equivalent per silicon-bonded hydrogen of an oxidizing agent which is permanganyl chloride, chromyl chloride, mercuric chloride, mercuric oxide, conc. sulphuric acid or silver oxide (or substances yielding such agents) at a temperature sufficient to remove the silicon-bonded hydrogen from the system, and (2) at least one mol. per mol. of total organo tri- and tetra-chlorosilane of glacial orthophosphoric acid, and then distilling off the triorganochloro- and di-organodichloro-silanes. Steps (1) and (2) may be carried out together or in either order. If no hydro-silanes are present, step (1) is omitted. The organic groups may be alkyl, alkenyl, cycloalkyl, cycloalkenyl, aryl, aralkyl, alkaryl and their halogenated derivatives. Examples of substances which yield oxidizing agents in situ are chromic oxide, potassium dichromate, manganese heptoxide and potassium permanganate. In step (2), the phosphoric acid preferentially esterifies the tri- and tetra-chlorosilanes. Preferably the mixtures contain less than 0,2 mol. per cent of these chlorosilanes and less than 0,5 mol. per cent of silicon-bonded hydrogen. The diorganodichlorosilanes are hydrolyzed and condensed to high molecular linear gums. Examples are given. |
| priorityDate | 1958-10-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 37.