Abstract The present invention provides the process for treating the animal hairs by solubilization wherein the animal hairs can be treated in a short time without any complicated operations and special apparatuses, and the process for recovering the solubilized product of the animal hairs wherein said product can be recovered simply and efficiently from the solution thereof. The former is the process for treating animal hairs by solubilization which comprises solubilizing the animal hairs in a weak alkaline liquid medium in the presence of an oxidizing agent whose concentration is high. The latter is the process for recovering a solubilized product of animal hairs which comprises admixing a solution of said product with an organic acid or an aqueous solution thereof to precipitate said product.
A process for solubilizing animal hair which comprises contacting the animal hair in an alkaline liquid medium containing more than 20% by weight of hydrogen peroxide at a pH of 8-9.
Claim 2
Dependent Claim
31 words
A process for solubilizing animal hair which comprises contacting the animal hair in an alkaline liquid medium containing more than 20% by weight of hydrogen peroxide at a pH of 8-9.
Claim 3
Dependent Claim
36 words
A process for preparing a keratin solution which comprise solubilizing animal hair by contacting the animal hair in an alkaline liquid medium containing more than 20% by weight of hydrogen peroxide at a pH of 8-9.
Claim 4
Dependent Claim
36 words
A process for preparing a keratin solution which comprise solubilizing animal hair by contacting the animal hair in an alkaline liquid medium containing more than 20% by weight of hydrogen peroxide at a pH of 8-9.
Claim 5
Dependent Claim
56 words
A process for preparing keratin powder which comprises contacting the animal hair in an alkaline liquid medium containing more than 20% by weight of hydrogen peroxide at a pH of 8-9 to form a keratin solution, acidifying the keratin solution to form a gel, and washing the gel with a polar solvent to form keratin powder.
Claim 6
Dependent Claim
56 words
A process for preparing keratin powder which comprises contacting the animal hair in an alkaline liquid medium containing more than 20% by weight of hydrogen peroxide at a pH of 8-9 to form a keratin solution, acidifying the keratin solution to form a gel, and washing the gel with a polar solvent to form keratin powder.