http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-640361-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_b5f667738c340d6885bd9e11da615bac |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B25-28 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C05B1-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B25-405 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B25-40 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B25-28 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C05B1-06 |
| filingDate | 1947-04-02^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1950-07-19^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-640361-A |
| titleOfInvention | Improvements in method and apparatus for ammoniation of phosphoric acid |
| abstract | Diammonium phosphate is made by continuously introducing phosphoric acid and ammonia gas into a reaction chamber, in which a constant pressure is maintained, withdrawing the ammonium phosphate and collecting in the <PICT:0640361/III/1> upper part of the chamber the mixture of steam and ammonia which is evolved, from which the ammonia is separated by condensation and, if desired, by distillation, and recycled to the chamber after addition of fresh ammonia equal to the amount used in the reaction, the respective quantities of phosphoric acid and ammonia continuously introduced into the chamber being maintained constant, and the partial pressure of ammonia gas in the chamber sufficing to prevent decomposition of the diammonium phosphate formed. As shown, phosphoric acid from vat 2 is supplied through a measuring device 7 and siphon 12 to a saturator 6 into which hot ammonia gas is passed from pipe 20 and the hot paste which is formed is withdrawn through pipe 13, granulated and dried. Steam formed during the reaction and ammonia pass through line 14 to a reflux condenser 15 from which cold dry ammonia is discharged into pipe 18 and returned through compressor 19 and heat exchanger 21 to the saturator after addition of fresh ammonia through valve 23; uncondensable gases are continuously purged through pipe 24, ammonia carried over being recovered in the phosphoric acid in vat 2. The slightly ammoniacal condensate from 15 is passed to a distillation column 28 from which ammoniacal vapour is returned through pipes 32 and 14 to condenser 15 and exhausted liquor is discharged through line 32 and heat-exchanger 21. The circulation of cooling water in condenser 15 and admission of steam to heating coil 29 of the distillation column are automatically controlled by regulators 26 and 30 respectively in conjunction with respective pyrometers 25 and 31. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-104888482-A |
| priorityDate | 1947-02-12^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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