| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_91b946a7385f93db0bda8077ca5e53f2
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_ffffc64f3f6f5faa2b673ab91a6f7fc4
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_6438341950f7d69345ebfff275250be5
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_a0b84fce6bf49e55049f4d5917d1335b
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_a1caef21394620271eb8a9d80cc46cb6
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_426c8875fb4be1c1b113eb79e3eeb2f0
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_1e0413cb639e2c3758384bf5e405ec5e
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_9845d4cdd202574536040126b71a7765 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02W30-50 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C14C3-32 |
| filingDate |
1987-08-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2e250382e06f843b08fd4088c54e5226
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b320c698874ec0674f5abd4b12da8c4f
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b8682759c46c0ecd6cd5230b48dd897b
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c2faaf3dd6b831cd82f2fa19d5e4ee8f
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_01ba0b5f5ae3954dc540273a65bdfd92
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_083e94dfd6bbdec32caa820552bb989a
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c2b70f047e11ea2938ca321a8bf260de
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_303c0e55a3795d239597e68019c273c4 |
| publicationDate |
1991-06-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
HU-T55838-A |
| titleOfInvention |
Working up chrome-tanned waste leather |
| abstract |
Chrome cured leather waste is processed at room temp. and atmospheric pressure at pH 12-13 with a potassium carbonate contg. sodium-carbonate soln.. Water for prepn. of this soln. is deionised or at least calcium-free. Hydrogen-peroxide is added while pH is maintained. The protein suspension is sepd. from the soln. by filtration and pptd. chrome is removed as Cr(OH)3 and Cr(SO4)3 from the filtrate following the addn. of FeSO4. Chromium-free water is opt. recirculated to the presoaking stage. Collagen is regenerated by sulphuric acid hydrolysis and remaining Cr(VI) ions are reduced by sodium pyrosulphite. The soln. is filtered and chrome-alum KCr(SO4)2 formed is opt. returned into the curing cycle. - The protein component washed by water and dried, has several direct uses. The chromium content of the protein may be reduced to less than 1ppm by dialysis after sulphuric acid treatment and water washing and by pptn. with Na2SO4. Further purification is possible by repetition of this process. (-pp Dwg.No.0/0) |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2009000962-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/ES-2310483-A1 |
| priorityDate |
1987-08-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |