FIELD: leather and fur production. SUBSTANCE: method comprises dissolving chromichromate at chromium (III) to chromium (VI) oxide ratio of 0.8-1.2 in sulfuric acid till chromium (III) compounds are completely deoli, reducing chromium (VI) present in original chromichromates with inorganic or organic reducing agents, subsequently correcting basicity of chromium compounds to desired value by adding sodium or potassium dichromate and additionally reducing chromium (VI) by adding inorganic and organic reducing agent. EFFECT: improved quality of tanning agent and greater reliability of controlling chromium (VI) reducing process.
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF MAKING CHROMIUM TANNING LEATHERS | 1998 |
|
RU2130495C1 |
| METHOD OF TREATING FUR SKINS | 1999 |
|
RU2149902C1 |
| METHOD OF PREPARING CHROME TANNER | 1998 |
|
RU2130077C1 |
| CORIUM OF GENUINE LEATHER AND FUR SEMIFINISHED PRODUCT AND METHODS FOR MANUFACTURE THEREOF | 2002 |
|
RU2206620C1 |
| METHOD OF ESTIMATING TANNING CAPACITY OF CHROME TANNER | 1998 |
|
RU2132555C1 |
| METHOD OF PRODUCING CHROME TANNING AGENT | 0 |
|
SU882936A1 |
| 0 |
|
SU244322A1 | |
| METHOD OF PREPARING CHROMETAN | 0 |
|
SU574394A1 |
| METHOD FOR PROCESSING SLUDGE RESULTING FROM SODIUM CHROMATE PRODUCTION | 1995 |
|
RU2083497C1 |
| METHOD OF CHROME TANNING AGENT PREPARING | 1991 |
|
RU2017824C1 |
