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AssigneeArtoni S.A.S. Di Artoni Giancarlo & Co.
InventorGiancarlo Artoni
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The present invention refers to a continuous process for gelatines production and chromium recovery from tanned hides and skins shaving, containing trivalent chromium. The claimed process consists in an acid hydrolysis followed by separations of the various products, wherefrom three major components are obtained: gelatine from collagen, tanning chromium salt, used for hides and skins tanning, and the hydrolysing agent. The gelatines obtained can be used as adhesives in various industrial sectors, i.e. from the industry of abrasives to the paper and cardboard industry, to bookbinding, to the industry of dyes and plasters, to the production of matches. The chromium salts obtained can be recovered and reused in the tanning industry; the hydrolysing agent may be recycled.
Process for gelatine production and chromium salts recovery from tanned hides and skins shaving products, comprising at least by the following steps:
The process as claimed in any preceding claims, wherein the gelatine solutions obtained by desalination and/or dialysis are recovered and concentrated.
The process as claimed in any preceding claims, wherein the chromium salts solutions obtained by desalination and/or diafiltration and/or ion exchange resins selective regeneration, are recovered and concentrated.
The process as claimed in any preceding claims, wherein the phases containing the hydrolysing agent obtained by desalination and/or diafiltration are recovered and recycled.
The process as claimed in any preceding claims, wherein the water recovered during gelatine and chromium salts concentration is recycled.
Dependencies are inferred from the claim text.