http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-3615184-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_838cee78914619aafc3c752655e1fcc4 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10S159-25 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B25-301 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B25-30 |
| filingDate | 1967-12-29^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1971-10-26^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_392f5f0383e010e94893328b33da59aa http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f93883f39993bae1c6000d369b9f298e |
| publicationDate | 1971-10-26^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-3615184-A |
| titleOfInvention | Process of producing alkali metal orthophosphates |
| abstract | Alkali metal salts of orthophosphoric acid are obtained by continuously reacting the required amounts of concentrated phosphoric acid with 40 percent to 65 percent of phosphorus pentoxide, with a 40 percent to 70 percent alkali metal hydroxide solution in a flash reactor, continuously passing the resulting reaction product through a single-effect or a multiple-effect evaporator which may be under vacuum to concentrate the same, thereby utilizing the steam set free in the reactor and, if multiple-effect evaporators are used, the steam generated in each preceding evaporator to heat the following evaporator, and separating the crystals from the mother liquor which may be recirculated into the reactor and/or the evaporators. Proceeding in this manner permits one to produce crystalline alkali metal orthophosphates in substantially dry form without additional supply of heat energy. The apparatus assembly for carrying out this improved process consists of a flash reactor with stirring device, a single-effect evaporator or a multiple-effect evaporator connected in series with the reactor, a device for separating crystals from liquid such as a centrifuge, and a vacuum device. Pipes connecting the evaporators with, and conducting the condensed steam therefrom to, heat exchangers for preheating the reaction components may be provided, likewise pipes connecting the liquid discharge of the separating device with the reactor and/or the evaporators. Examples of alkali metal orthophosphates obtained by the process and apparatus of this invention are monosodium and monopotassium orthophosphates, disodium orthophosphates with and without water of crystallization, trisodium orthophosphate. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-11584647-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2021179429-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-3893894-A |
| priorityDate | 1966-12-30^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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