http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1168833-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_13ef102659c1a496330aeae6979abc83 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D01H7-225 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D01H7-22 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C12N1-02 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D01H7-22 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C12N1-02 |
| filingDate | 1966-02-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_46fede0827e4bf0fbd7d576a11bd8ed8 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_5f220c2adddca53c4221c1c1791efa8f http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e22a909e9856e5c594303342fe9d0e9c |
| publicationDate | 1969-10-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1168833-A |
| titleOfInvention | Solvent Extraction Process |
| abstract | 1,168,833. Recovering yeast &c. BRITISH PETROLEUM CO. Ltd. Jan.13, 1967 [Feb. 9, 1966], No. 5640/66. Heading C6F. Contaminants consisting of, or comprising, at least one hydrocarbon and water are removed from a solid material (micro-organism) by extracting the contaminated solid material, in an extraction stage consisting of one or more extraction steps, with a mixture of an alcohol and a hydrocarbon with which it forms an azeotrope, these being employed in the mixture at a ratio by volume within the range 30: 70 to 70:30. The treated solid material from the first extraction stage may be further extracted with a mixture of the alcohol and azeotrope-forming hydrocarbon in a second extraction stage. The extract fractions from the first and second extraction stages, either separately or after blending, are fed to a distillation stage for the separate recovery of; (a) an azeotropic mixture of the alcohol and the azeotropeforming hydrocarbon, (b) an azeotropic mixture of the alcohol and water, and (c) a residue fraction. Substantially all the azeotropic mixture of the alcohol and water is blended with part of the azeotropic mixture of the alcohol and azeotrope-forming hydrocarbon to give a mixture of the alcohol and azeotrope-forming hydrocarbon containing these materials at a ratio by volume in the range 30:70 to 70:30 for recycling to the first extraction stage. The contaminated material preferably is diluted with water before the extraction to give a ratio of water to total alcohol and azeotrope-forming hydrocarbon mixture added in the range 1:4 to 1:10 by weight. Examples are directed to extracting the following micro-organism products, after partial refining by centrifuging, treatment with a specified surface active agent and washing with water until the hydrocarbon content was less than 7% based on the dry weight of the micro-organism; (1, 3 and 5) Candida tropicalis or Hansenula suavesleus after cultivation upon a heavy gas oil of petroleum origin; and (2 and 4) Candida utilis after cultivation upon mixed C 10 -C 20 hydrocarbons containing normal paraffins. The solvent mixture consisted for the first extraction stage of 50% by weight of n-hexane and of isopropanol, and for a second extraction stage of 80% by weight of n-hexane and 20% by weight of isopropanol. The products were almost entirely freed from lipids. |
| priorityDate | 1966-02-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 30.