The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 18, 2011
Filed:
Jan. 11, 2011
Applicants:
Theodora Retsina, Atlanta, GA (US);
Vesa Pylkkanen, Atlanta, GA (US);
Adriaan Van Heiningen, Orono, ME (US);
Inventors:
Theodora Retsina, Atlanta, GA (US);
Vesa Pylkkanen, Atlanta, GA (US);
Adriaan van Heiningen, Orono, ME (US);
Assignee:
American Process, Inc., Atlanta, GA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
D21C 3/06 (2006.01); D21C 3/20 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method for the fractionation of lignocellulosic materials into cellulose, hemicelluloses and lignin in a batch or continuous process in a treatment with vaporous mixture of aliphatic alcohol, sulfur dioxide and water. Cooking conditions are varied to get different proportions of cellulose, hemicelluloses and lignin. Chemical recovery through pressure release is described.