Rohm and Haas Company

A. L. Gebhardt Company

Donald Francis Holloway

John G Brodnyan

Stanley Le Sota

Nutritious water soluble protein hydrolysate having an average molecular weight between about 1500 and 10,000 is obtained by heating to at least about 200.degree. F a mixture of, by weight: 100 parts chrome leather scrap; at least 100 parts water; and at least eight parts calcium oxide, calcium hydroxide, magnesium oxide, or magnesium hydroxide, with the proviso that at least 4.8 of these eight parts be calcium oxide or calcium hydroxide. Simultaneously, chromium is substantially insolubilized and precipitates. The protein is separated from the precipitated chromium compounds and neutralized with acid to provide a nutritious feed or feed supplement. The chromium is washed to remove all protein and dissolved in sulfuric acid to provide a chromium solution useful in tannery operations.

Process for recovery and separation of nutritious protein hydrolysate

Crushed foam coated leather and leather-like materials characterized by excellent foam adherence, are prepared by flowing foamed compounded polymeric latices into contact with a leather or leather-like substrate and partially drying same, followed by compressive crushing of the dried foam, plating or embossing to achieve optimum adhesion, and further heating and curing to develop maximum physical properties.

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Milwaukee, WI, United States of America

Donald Francis Holloway