http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-727501-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_dc2f7134efa50484bb359fda73782848 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09B9-00 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B9-00 |
| filingDate | 1952-09-30^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1955-04-06^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-727501-A |
| titleOfInvention | Manufacture of dry dyestuff preparations |
| abstract | Aqueous solutions or suspensions of soluble salts of leuco vat dye sulphuric acid esters are spray-dried. The air may be introduced at over 100 DEG C., e.g. 150-160 DEG C. and stabilizing agents may be present. In examples, (1) an aqueous solution of the potassium salt of the tetrasulphuric acid ester of tetrahydro-3,31-dichloro - 1.2.21.11 - dianthraquinone azine are spray-dried alone or with the addition of sodium carbonate and urea, with or without aqueous ammonia; (2) the corresponding 3.31-dibromo body in aqueous solution containing sodium carbonate and urea is spray-dried; (3) the sodium salt of the sulphuric ester of leuco-indigo or its tetra-brom derivative are spray-dried as aqueous solutions in presence of molasses, urea, and sodium carbonate; (4) the potassium salt of the sulphuric ester of leuco-Bz.2.Bz.21-dimethoxy-dibenzanthrone is spray-dried as an aqueous solution with molasses, urea and sodium hydroxide; (5) the sodium salts of the leuco-sulphuric esters of the following are spray-dried as aqueous suspensions or solutions containing sodium hydroxide or carbonate and in some cases urea and the sodium salt of di-n-butyl-naphthalene sulphonic acid: (a) 4.41-dimethyl-6.61 - dichlorothioindigo, (b) di - isopropyl dipyrazolanthronyl, (c) dibenzpyrenequinone, (d) 6.61 - diethoxythioindigo, (e) 1.41.11.111 - trianthrimide carbazole, (f) the alkaline condensation product from 1-(Bz.1-benzanthronyl) aminoanthraquinone. Specification 500,120 is referred to. |
| priorityDate | 1951-10-04^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
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