http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-3634289-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_af99df08b153738cd418446a75d09bfc |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B27K3-02 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B27K3-00 |
| filingDate | 1969-09-25^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1972-01-11^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1ff6ffc92dc45ee1a545525c80f5d27b |
| publicationDate | 1972-01-11^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-3634289-A |
| titleOfInvention | Process for reclaiming wood treating composition |
| abstract | A PROCESS FOR RECOVERING A WOOD PRESERVATIVE, E.G., PENTACHLOROPHENOL, AND ITS CARRIER FROM A TREATING COMPOSITION WHICH COMPOSITION, THROUG USAGE, HAS ACCUMULATED CONTAMINATES, WOOD ROSINS, DIRT, ETC. ALONG WITH A PROCESS FOR REDUCTION OF CORROSION OF CONTAINERS USED FOR STORING THE CARRIER-PRESERVATIVE COMPOSITION WHICH INCLUDES: REACTING THE CONTAMINATED TREATING COMPOSITION WITH AN AQUEOUS SOLUTION OF AN ALKALI METAL BASE, EG., NA2CO3 OR NAOH, IN AN AMOUNT SUFFICIENT TO CONVENT THE PRESERVATIVE, E.G., PENTACHLOROPHENOL, TO ITS WATER-SOLUBLE ALKALI METAL SALT FORM; ALLOWING THE WATER AND THE SALT DECANTING THE AQUEOUS-LAYER CONTAINING THE PRESERVATIVE IN ITS SALT FORM FROM THE CARRIER AND CONTAMINANTS; SUBJECTING THE CARRIER AND CONTAMINANTS REMAINING AFTER DECANTATION TO DISTILLATION TO RECOVER THE VOLATILE CARRIER (THE CONTAMINANTS, THE DIRT, AND THE ROSINS WITH REMAIN BEHIND IN THE RESIDUE); MIXING CLEAN DISTILLED CARRIER WITH THE DECANTED AQUEOUS LAYER AND SUFFICIENT ACID TO CONVERT THE SALT TO THE SOLVENT-SOLUBLE ACID FORM, THEREBY TO RECOVER THE PRESERVATIVE IN SOLUTION IN THE CARRIER; FINALLY, DECANTING THE WATER AFTER SETTLING OF THE NEWLY CONSTITUTED TREATING COMPOSITION. ALTERNATIVELY, THE PRESERVATIVE MAY BE REGENERATED BY ACID FROM THE WATER, SEPARATED FROM THE WATER AND THEN MIXED WITH THE CLEAN SOLVENT. GENERALLY NOT ALL OF THE SALT FORM OF THE PRESERVATIVE WILL BE CONVERTED AND CERTAINLY NOT ALL OF THE WATER WILL BE REMOVED FROM THE CARRIER, THUS WHEN THE CLEAN TREATING COMPOSITION, CONTAINING THE CARRIER AND THE PRESERVATIVE, IS STORED, SOME OF THE SALT FORM OF THE RESERVATIVE AS WELL AS WATER WILL BE PRESENT AND FORM AN AQUEOUS LAYER OVER THE CARRIER UPON STANDING AS DURING STORAGE. IT HAS BEEN FOUND THAT THIS AQUEOUS LAYER CONTAINING SOME OF THE PRESERVATIVE IN ITS SALT FORM WILL PREVENT THE CORROSION OF THE METAL CONTAINER OF VESSEL AT THE MOST CORROSIVE POINT, THE INTERFACE OF THE SOLVENT AND WATER. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/FR-2583041-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-3948802-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4075121-A |
| priorityDate | 1969-09-25^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
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