FIELD: tannery industry, in particular method for syntan (synthetic tanning material) production.
SUBSTANCE: claimed method includes diphenolepropane sulgation and condensation with formaldehyde followed by acidifying with sulfuric acid. Formed product is dispersed in lignosulfates containing 0.5-1.5 % of aluminum sulfate as calculated to aluminum oxide.
EFFECT: syntans with stable content of tanned materials: environmentally friendly and economical process.
1 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF SYNTAN SYNTHESIS | 1992 |
|
RU2041954C1 |
| METHOD OF PREPARING SYNTHETIC TANNER | 2000 |
|
RU2173711C1 |
| METHOD OF PREPARING SYNTHETIC TANNER | 2000 |
|
RU2173713C1 |
| METHOD OF PREPARING SYNTHETIC TANNER FOR CLEAR SKINS | 1999 |
|
RU2156305C1 |
| METHOD OF PREPARING SYNTHETIC TANNER | 2000 |
|
RU2171295C1 |
| METHOD OF PREPARING SYNTHETIC TANNER | 2000 |
|
RU2173710C1 |
| PROCESS FOR PREPARING SYNTAN | 1992 |
|
RU2029786C1 |
| METHOD FOR MAKING LEATHER FOR FOOTWEAR BOTTOMS | 0 |
|
SU1134600A1 |
| 0 |
|
SU166089A1 | |
| METHOD OF PREPARING SYNTHETIC TANNER | 2000 |
|
RU2173712C1 |
