System and method for conditioning a hardwood pulp liquid hydrolysate
US9068291B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Nov 13, 2013 |
| Grant date | Jun 30, 2015 |
| Priority date | — |
| Expiry date | Nov 13, 2033 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21C11/10
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
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, hydrolyzes 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.