http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-731540-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_59ed4aeb54ad543d16aaa5ef81f24ecb |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J2219-00164 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P20-141 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J2219-00058 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J2219-00087 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J2219-00069 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01D7-18 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J19-2465 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J19-243 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J19-24 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01D7-18 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J19-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J19-24 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J10-00 |
| filingDate | 1950-06-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1955-06-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-731540-A |
| titleOfInvention | Improvements relating to method of conducting chemical reactions and apparatus therefor |
| abstract | In a method of continuously conducting exothermic reactions between a solution of a reactant and a gas and involving a change of phase of the reaction product so formed from the dissolved to the crystalline state, of the type which comprises circulating in a closed cyclic path a body of supersaturated solution of the reaction product containing a slurry of such product, continuously feeding a reactant-containing liquid and subsequently in the cycle, a gaseous reactant and thereafter passing the mixture through cooled pipes at a velocity to create a turbulence equivalent to a calculated Reynolds number of 500 or more, and withdrawing a product slurry, the method is characterized by passing the body of supersaturated solution of the reaction product through the cooled pipes immediately after the addition of the gaseous reactant. The method is exemplified in the Figure by the production of sodium bicarbonate from brine and ammonia and carbon dioxide. A body of sodium chloride, ammonium chloride and sodium bicarbonate, saturated with and carrying a slurry of the latter is circulated in a cycle comprising a surge tank 5, a pump 6 <PICT:0731540/III/1> delivering liquid to a gas-injection stage 14, a cooled tubular reactor 7 and return pipe to tank 5. Ammonia and carbon dioxide are fed from metering supplies 12 and 13 to the injection stage 14 whilst brine is fed from a tank 1 provided with an agitator through pump 3 to vessel 5. A portion of the slurry is withdrawn by pipe 15 for recovery of the sodium bicarbonate produced. Production may also be effected in stages, two cycles above described being arranged in series. In such a case all the brine and ammonia but only half the required carbon dioxide are added in the first stage. A clear solution with no crystals results and is in part withdrawn for use as the liquid reactant in the second stage where the remainder of the carbon dioxide is injected. The invention is also stated to be applicable to the production of ammonium sulphate by reacting a slurry of gypsum with ammonia and carbon dioxide and to the treatment of chromium ores with carbon dioxide to produce sodium dichromate and sodium carbonate. The velocity of the circulating slurry through the tubular reaction zone should be held at a minimum consistent with reaction rate to avoid excessive crystal breakage but should always be sufficient to create the turbulence equivalent to the calculated Reynolds number of 500. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-106422994-B http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-106422994-A |
| priorityDate | 1951-06-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 41.