公开(公告)号：US10961552B2

公开(公告)日：2021-03-30

申请号：US16332063

申请日：2017-09-06

申请人： RISE INNVENTIA AB

发明人： Victor Robertsson ,  Niklas Berglin ,  Mikael Jansson

IPC分类号： C12P7/56 ,  C12P7/40 ,  C12P7/42 ,  C12P7/46 ,  C12P7/48 ,  C12P7/50 ,  C12P7/52 ,  C12P7/54 ,  C12P7/58 ,  C12P13/14 ,  C13K1/02 ,  D21C1/06

摘要： Process for the production of an organic acid from a lignocellulosic feedstock. The process is integrated with a pulp mill and comprises: a) pre-treating a lignocellulosic feedstock with an alkaline liquor from the pulp, thereby obtaining a pretreated cellulosic feed and a black liquor; b) subjecting the pretreated cellulosic feed from step a) to enzymatic hydrolysis, thereby obtaining a saccharide feed; c) subjecting the saccharide feed from step b) to microbial fermentation using calcium oxide from the pulp mill as a neutralising agent, thereby obtaining an organic acid calcium salt; d) treating the organic acid calcium salt with sulfuric acid, thereby obtaining the organic acid; e) optionally isolating lignin from the black liquor obtained in step a), thereby obtaining lignin and weak black liquor; and f) returning the black liquor from step a) and/or the weak black liquor from step e) to the pulp mill chemical recovery process.