Process for treating lignin

• Main Authors: Lake, Michael A, Blackburn, John C, Hayden, J. George
• Format: Patent
• Language: English
• Published: 09.01.2024
• Subjects: APPARATUS THEREFOR; CHEMISTRY; COMPOUNDS OF UNKNOWN CONSTITUTION; METALLURGY; ORGANIC CHEMISTRY; PAPER-MAKING; PRODUCTION OF CELLULOSE; PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCESFROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; TEXTILES

This invention provides improvements to processes for making granular lignin from black liquor. One of the improvements is that the use of a pre-carbonation column reduces the CO2 flow into the sparger of a carbonation column. The pre-carbonation column is used to reduce the pH of the black liquor t...