Leather tanning agent and process for making same

Details Leather tanning agent and process for making same Leather tanning agent and process for making same

C - Chemistry, Metallurgy

14

C

8/67

C14C 3/04 (2006.01)

Patent

CA 1193804

LEATHER TANNING AGENT AND PROCESS FOR MAKING SAME A b s t r a c t A leather tanning agent characterized in that it con- tains the following components, per cent by weight: sulphate of aluminium and ammonium containing 0.001 to 1.0% of TiO2 or TiO2 and ZrO2 3 to 20 and/or sulphate of zirconium and ammonium con- taining 0.001 to 0.5% of TiO2 or TiO2 and Al2O3 20 to 50 and sulphate of titanyl and ammonium contain- ing 0.001 to 1.0% of Al2O3 and/or ZrO2 the balance. The above-mentioned additives of TiO2, ZrO2 and Al2O3 incorporated in the sulphates are present therein in a che- mically combined state. A process for producing the leather tanning agent is c h a r a c t e r i z e d i n t h a t a titanium-con- taining solution with a concentration of titanium of from 80 to 200 g/l as calculated for titanium dioxide is reacted with a solution of aluminium sulphate containing 80 to 130 g/l of aluminium as calculated for alumina, and/or a so- lution of zirconium sulphate containing 50 to 200 g/l of zir- conium as calculated for zirconium dioxide in the presence of sulphuric acid and ammonium sulphate. The sulphate tanning agent according to the present invention can be very useful in the leather industry.

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