Stuart A Black

US Patent:

57308373, Mar 24, 1998

Filed:

Dec 2, 1994

Appl. No.:

8/348469

Inventors:

Stuart K. Black - Denver CO
Bonnie R. Hames - Westminster CO
Michele D. Myers - Dacono CO

Assignee:

Midwest Research Institute - Kansas City MO

International Classification:

D21C 320

US Classification:

162 16

Abstract:

A method for separating lignocellulosic material into (a) lignin, (b) cellulose, and (c) hemicellulose and dissolved sugars. Wood or herbaceous biomass is digested at elevated temperature in a single-phase mixture of alcohol, water and a water-immiscible organic solvent (e. g. , a ketone). After digestion, the amount of water or organic solvent is adjusted so that there is phase separation. The lignin is present in the organic solvent, the cellulose is present in a solid pulp phase, and the aqueous phase includes hemicellulose and any dissolved sugars.

US Patent:

52236013, Jun 29, 1993

Filed:

Jan 29, 1991

Appl. No.:

7/647020

Inventors:

Helena L. Chum - Arvada CO
Stuart K. Black - Denver CO
James P. Diebold - Lakewood CO
Roland E. Kreibich - Auburn WA

Assignee:

Midwest Research Institute Ventures, Inc. - Kansas City MO

International Classification:

C07C 3720
C08G 1402

US Classification:

528129

Abstract:

A process for preparing phenol-formaldehyde novolak resins and molding compositions in which portions of the phenol normally contained in said resins are replaced by a phenol/neutral fractions extract obtained from fractionating fast-pyrolysis oils. The fractionation consists of a neutralization stage which can be carried out with aqueous solutions of bases or appropriate bases in the dry state, followed by solvent extraction with an organic solvent having at least a moderate solubility parameter and good hydrogen bonding capacity. Phenolic compounds-containing/neutral fractions extracts obtained by fractionating fast-pyrolysis oils from a lignocellulosic material, is such that the oil is initially in the pH range of 2-4, being neutralized with an aqueous bicarbonate base, and extracted into a solvent having a solubility parameter of approximately 8. 4-9. 11 [cal/cm. sup. 3 ]. sup. 1/2 with polar components in the 1. 8-3.

US Patent:

49422693, Jul 17, 1990

Filed:

Mar 17, 1988

Appl. No.:

7/169506

Inventors:

Helena L. Chum - Arvada CO
Stuart K. Black - Denver CO

Assignee:

Midwest Research Institute - Kansas City MO

International Classification:

C07C 3720

US Classification:

585240

Abstract:

A process is disclosed for fractionating lignocellulosic materials fast-prolysis oils to produce phenol-containing compositions suitable for the manufacture of phenol-formaldehyde resins. The process includes admixing the oils with an organic solvent having at least a moderate solubility parameter and good hydrogen The United States Government has rights in this invention under Contract No. DE-AC02-83CH10093 between the United States Department of Energy and the Solar Energy Research Institute, a Division of the Midwest Research Institute.

US Patent:

52350215, Aug 10, 1993

Filed:

Dec 16, 1991

Appl. No.:

7/806897

Inventors:

Helena L. Chum - Arvada CO
Stuart K. Black - Denver CO
James P. Diebold - Lakewood CO
Roland E. Kreibich - Auburn WA

International Classification:

C08G 804
B66C 100
B32B 2108
C08J 1100

US Classification:

528129

Abstract:

A process for preparing phenol-formaldehyde resole resins by fractionating organic and aqueous condensates made by fast-pyrolysis of biomass materials while using a carrier gas to move feed into a reactor to produce phenolic-containing/neutrals in which portions of the phenol normally contained in said resins are replaced by a phenolic/neutral fractions extract obtained by fractionation.