PROCESSES FOR PRODUCING HIGH-YIELD PULP AND PAPER PRODUCTS
First Claim
1. A process for producing a paper product from biomass, said process comprising:
- (a) providing lignocellulosic biomass comprising cellulose, hemicellulose, and lignin;
(b) digesting said biomass in the presence of steam and/or hot water to generate an intermediate pulp material and a liquid phase, wherein said liquid phase contains extracted hemicelluloses;
(c) mechanically refining said intermediate pulp material, to generate a refined pulp material; and
(d) introducing said refined pulp material, said liquid phase or a derivative thereof, and optionally a separate solid material to a paper machine, to produce a paper product.
2 Assignments
0 Petitions
Accused Products
Abstract
An improved semichemical pulping process is disclosed to reduce washing costs and recovery process costs, while producing equivalent pulp and paper products. In some variations, the invention provides a process for producing a paper product from biomass, comprising: digesting lignocellulosic biomass in the presence of steam and/or hot water to generate an intermediate pulp material and a liquid phase containing extracted hemicelluloses; mechanically refining the intermediate pulp material, to generate a refined pulp material; and introducing the refined pulp material, the liquid phase, and optionally a separate solid material to a paper machine, to produce a paper product. The process optionally employs no washing step. When the liquid phase is washed from the intermediate pulp material or the refined pulp material using an aqueous wash solution, the wash filtrate may be introduced directly or indirectly to the paper machine.
2 Citations
20 Claims
-
1. A process for producing a paper product from biomass, said process comprising:
-
(a) providing lignocellulosic biomass comprising cellulose, hemicellulose, and lignin; (b) digesting said biomass in the presence of steam and/or hot water to generate an intermediate pulp material and a liquid phase, wherein said liquid phase contains extracted hemicelluloses; (c) mechanically refining said intermediate pulp material, to generate a refined pulp material; and (d) introducing said refined pulp material, said liquid phase or a derivative thereof, and optionally a separate solid material to a paper machine, to produce a paper product. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A process for producing a pulp product from biomass, said process comprising:
-
(a) providing lignocellulosic biomass comprising cellulose, hemicellulose, and lignin; (b) digesting said biomass in the presence of steam and/or hot water to generate an intermediate pulp material and a liquid phase, wherein said liquid phase contains extracted hemicelluloses; (c) mechanically refining said intermediate pulp material, to generate a refined pulp material; and (d) combining said refined pulp material, said liquid phase or a derivative thereof, and optionally a separate solid material, to produce a pulp product. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
-
Specification