公开(公告)号：US4483829A

公开(公告)日：1984-11-20

申请号：US461501

申请日：1983-01-27

申请人： Giuliano Guardini

发明人： Giuliano Guardini

IPC分类号： A23J1/10 ,  C01G37/08 ,  C14C3/32 ,  C01G37/02

CPC分类号： C01G37/08 ,  A23J1/10 ,  C14C3/32 ,  Y02W30/76 ,  Y10S530/842 ,  Y10S530/859

摘要： Waste products from the chrome-tanning of hides are washed and then chopped in water, with subsequent hydrolyzation at a pH of at least 10.5 and at boiling or near-boiling temperature. The resulting suspension is filtered to yield a polypeptide solution and a cake of solids consisting essentially of chromium hydroxide. The solution is neutralized, dehydrated, cooled and filtered to provide a virtually chromium-free proteinaceous substance usable as plant or animal feed; the solids are washed, filtered and acidified to provide chromium sulfate suitable for reutilization in tanning.

摘要翻译： 将来自皮革的鞣制的废品洗涤，然后在水中切碎，随后水解至少10.5，沸点或接近沸点的温度。 过滤得到的悬浮液，得到多孔溶液和基本上由氢氧化铬组成的固体饼。 将溶液中和，脱水，冷却并过滤以提供可用作植物或动物饲料的几乎无铬的蛋白质物质; 将固体洗涤，过滤并酸化以提供适于在鞣制中再利用的硫酸铬。