http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-895943-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_1e70c0aeade92d7571d955d3b90ea06e |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B21-084 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B21-084 |
| filingDate | 1960-11-23^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1962-05-09^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-895943-A |
| titleOfInvention | Method of preparing dinitrogen tetrafluoride and nitrosyl fluoride |
| abstract | <PICT:0895943/III/1> Dinitrogen tetrafluoride and nitrosyl fluoride are produced by reacting nitrogen trifluoride with nitric oxide at 150 DEG C. or above in an inert atmosphere, e.g. N2, A or He. The molar ratio of NF3 to NO may be from 0,1 to 1 and 10 to 1, temperatures may be up to 950 DEG C. and contact time may be 0,01 sec. to 15 min. The NO and NF3 are passed from their storage tanks 1, 2 into 3 where mixing occurs. The mixture is fed into 4a, which is cooled, e.g. by a jacket of cold water, and then into 4b, which is heated, e.g. by an electric resistance coil, and then into 4c which is cooled, e.g. as 4a. 4 is made of or lined with a heat-resistant non-reactive material, e.g. Ni, Al, Cu, stainless steel or Pt. 4b may be packed with inert bodies, e.g. Ni balls and can be heated up to 607 DEG C. The gaseous product is finally fed into 5, a receiver where it can be liquefied and which can be jacketed with, e.g. liquid N2. Alternatively the products may be cooled to below 100 DEG C. and treated with aqueous alkali metal hydroxide, e.g. NaOH, to remove NOF, cooled to -180 DEG C. and then fractionally distilled to separate N2F4, which may then be vapour chromatographed, e.g. by molecular sieves. The NOF may also be removed by contacting the hot products with a metal (preferably other than alkali or alkaline earth). Both NOF and N2F4 can be obtained from the products by vacuum fractionation which may be followed by vapour chromatography. The NF3 may be prepared by reacting NH3 with F2 or electrolysis of molten fluorides or of urea in anhydrous HF. NH3 oxidation product gases containing mainly N2 together with some NO are suitable for use as feedstock and diluent. Specification 758,477 is referred to. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4832931-A |
| priorityDate | 1960-03-08^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
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