PROCESS FOR THE PRODUCTION OF AN ORGANIC ACID FROM A LIGNOCELLULOSIC FEEDSTOCK
收藏国家林业和草原科学数据中心2023-02-12 更新2024-03-07 收录
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资源简介：
The present invention relates to a process for the production of an organic acid from a lignocellulosic feedstock. The process is integrated with a pulp mill and comprises the steps: a) providing a lignocellulosic feedstock; b) obtaining an alkaline liquor from the pulp mill; c) pre-treating the lignocellulosic feedstock with the alkaline liquor， thereby obtaining a pretreated cellulosic feed and a black liquor; d) obtaining calcium oxide from the pulp mill; e) subjecting the pretreated cellulosic feed from step c) to enzymatic hydrolysis， thereby obtaining a saccharide feed; f) subjecting the saccharide feed from step e) to microbial fermentation using the calcium oxide from step d) as a neutralising agent， thereby obtaining an organic acid calcium salt; g) treating the organic acid calcium salt with sulfuric acid， thereby obtaining gypsum and the organic acid; h) optionally isolating lignin from the black liquor obtained in step c)， thereby obtaining lignin and weak black liquor; and i) returning the black liquor obtained in step c) and/or the weak black liquor obtained in step h) to the pulp mill for integration with the pulp mill chemical recovery process; wherein steps e) and f) are performed either sequentially or simultaneously.
提供机构：
国家林业和草原科学数据中心
创建时间：
2023-02-12
