Chromium iii and chromium iv extraction process from cork waste, leather-finishing leather tanning industries and leather goods factories in general

摘要

"CHROME III AND CHROME VI EXTRACTION PROCESS FROM WASTE OF CURRENT, LEATHER-INDUSTRY, LEATHER FINISHERS AND LEATHER FACTORY PRODUCTS IN GENERAL". It is the subject of this invention for the extraction of chrome III and chrome VI from tannery waste, leather tanning industries, leather finishers (from chrome sludge, chrome tanning effluent sludge, effluent treatment (ETE), chrome-tanned leather sawdust, countersunk sawdust, wet-blue sawdust, chrome-tanned leather shavings, countersunk shavings, wet-blue shavings, chrome-tanned leather, wet-blue shavings, chrome-tanned leather flaps, wet-blue flaps, sander dust, sander sawdust, semi-finished leather sawdust, sander, semi-finished leather dust, leather dust, semi-finished leather shavings, semi-finished leather scraps, etc.) and General Leather Goods Waste (leather shavings semi-finished, patchwork leather semi-finished, trimmed leather trimmings, patchwork finished leather, leather flaps, etc.).