Conversion of knot rejects from chemical pulping
AssigneeFPInnovations
InventorsXiao Zhang, Zhi-Hua Jiang
Life of this patent
Estimating the term…
Abstract
Knot rejects from chemical pulping processes are subjected to acid hydrolysis or an enzymatic hydrolysis treatment. The resultant hydrolysate is enriched with glucose, representing a value-added raw material for products using hexoses. The residue, separated from the said hydrolysate after the acid hydrolysis or enzyme treatment, consists of mainly knots or chips. The residue has a much improved aesthetic appearance which can be readily used as value-added raw materials for mulch or similar applications. The residue could also be extracted to obtain high value antioxidants and other nutraceutical chemicals such as lignans or can be utilized according to currently known practices including recooking, burning and depositing.
Claims20
A process comprising:
- recovering intact botanical knot rejects which have been subjected to chemical pulping, and
- hydrolysing a carbohydrate fraction of said intact rejects to produce value-added products.
A hydrolysate from hydrolysis of intact botanical knot rejects which have been subjected to chemical pulping, said hydrolysate being rich in glucose.
An intact botanical knot residue as a by-product of hydrolysis of botanical knot rejects which have been subjected to chemical pulping, produced by the process of recovering botanical knot rejects which have been subjected to chemical pulping, and hydrolysing a carbohydrate fraction of said rejects.
Dependencies are inferred from the claim text.