ES2017146A6 - Procedure for manufacture of a synthetic tanning agent and use thereof in the tanning of leather. - Google Patents
Procedure for manufacture of a synthetic tanning agent and use thereof in the tanning of leather.Info
- Publication number
- ES2017146A6 ES2017146A6 ES8903124A ES8903124A ES2017146A6 ES 2017146 A6 ES2017146 A6 ES 2017146A6 ES 8903124 A ES8903124 A ES 8903124A ES 8903124 A ES8903124 A ES 8903124A ES 2017146 A6 ES2017146 A6 ES 2017146A6
- Authority
- ES
- Spain
- Prior art keywords
- tanning
- procedure
- manufacture
- leather
- synthetic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Treatment And Processing Of Natural Fur Or Leather (AREA)
Abstract
Procedure for manufacture of a synthetic tanning agent and use thereof in the tanning of leather. The invention relates to a procedure for manufacture of a synthetic tanning agent, which comprises the reaction of a mixture of at least 30 mol% sulphonated phenol and/or cresols and at most 70 mol% phenol and/or cresols in a neutral or alkaline medium, with at least 60 mol% formaldehyde, calculated on the free ortho and para positions of the aromatic rings, between 60 degree C and the boiling point of the mixture for 1 to 8 hours. The procedure can be combined with the known methods of tanning and can be used to prepare leathers of a light colour.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES8903124A ES2017146A6 (en) | 1989-09-14 | 1989-09-14 | Procedure for manufacture of a synthetic tanning agent and use thereof in the tanning of leather. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES8903124A ES2017146A6 (en) | 1989-09-14 | 1989-09-14 | Procedure for manufacture of a synthetic tanning agent and use thereof in the tanning of leather. |
Publications (1)
Publication Number | Publication Date |
---|---|
ES2017146A6 true ES2017146A6 (en) | 1991-01-01 |
Family
ID=8263891
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES8903124A Expired - Fee Related ES2017146A6 (en) | 1989-09-14 | 1989-09-14 | Procedure for manufacture of a synthetic tanning agent and use thereof in the tanning of leather. |
Country Status (1)
Country | Link |
---|---|
ES (1) | ES2017146A6 (en) |
-
1989
- 1989-09-14 ES ES8903124A patent/ES2017146A6/en not_active Expired - Fee Related
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FD1A | Patent lapsed |
Effective date: 20001009 |