http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-181678-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_49a75d449f8cbb4f94e87668c41ce2aa |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01D5-008 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01D5-00 |
| filingDate | 1922-02-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1923-03-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-181678-A |
| titleOfInvention | Methods for the treatment of alum with ammonia in order to obtain sulphates of potassium and ammonium and free alumina |
| abstract | Gaseous ammonia is injected into an alum solution heated to a temperature near its boiling point or alternatively an aqeuous solution of ammonia may be introduced in the form of a spray. After the removal of the alumina thereby precipitated by filtration, the potassium and ammonium sulphates are separated by crystallization, and the mother liquor employed to dissolve more alum. When the alum is obtained by hot lixiviation of crude material such as that obtained by treating leucite with sulphuric acid the precipitation may be effected advantageously directly while the solution is still hot.ALSO:A solution of alum is treated with ammonia under such conditions that the alumina is precipitated in a readily filterable form. The alum solution is precipitated at a temperature near its point of ebullition, the ammonia is added gradually and the liquor is subjected to continuous agitation. An aqueous solution of ammonia may be introduced in the form of a spray into the alum solution, or preferably gaseous ammonia is injected, in order to utilize the heat of solution. After the removal of the alumina by filtration the potassium and ammonium sulphates are separated by crystallization, and the mother liquor employed in the treatment of more alum. When the alum is obtained by hot lixiviation of crude material such as that obtained by treating leucite with sulphuric acid, the precipitation may be effected advantageously directly while the solution is still hot. |
| priorityDate | 1921-06-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 24.