System and method for conditioning a hardwood pulp liquid hydrolysate

Patent · 17 December 2013

OSTI ID:1111122

Waite, Darrell M; Arnold, Richard; St. Pierre, James; Pendse, Hemant P; Ceckler, William H

A system and method for hardwood pulp liquid hydrolysate conditioning includes a first evaporator receives a hardwood mix extract and outputting a quantity of vapor and extract. A hydrolysis unit receives the extract, hyrolyzes and outputs to a lignin separation device, which separates and recovers a quantity of lignin. A neutralization device receives extract from the lignin separation device and a neutralizing agent, producing a mixture of solid precipitate and a fifth extract. The solid precipitate is removed from the fifth extract. A second evaporator removes a quantity of acid from the fifth extract in a vapor form. This vapor may be recycled to improve total acid recovery or discarded. A desalination device receives the diluted extract, separates out some of the acid and salt and outputs a desalinated solution.

• Research Organization: Red Shield Acquisition, LLC, Old Town, ME, USA
• Sponsoring Organization: USDOE
• DOE Contract Number: EE0003364
• Assignee: Red Shield Acquisition, LLC (Old Town, ME); University of Maine System Board of Trustees (Bangor, ME)
• Patent Number(s): 8,608,970
• Application Number: 13/187,818
• OSTI ID: 1111122
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY