LIGNIN MANUFACTURING METHOD AND LIGNIN-BASED DISPERSANT
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PROBLEM TO BE SOLVED: To provide a method for manufacturing liquid lignin by omitting a solidification step when separating lignin from kraft digestion black liquid or soda digestion black liquid. SOLUTION: A lignin manufacturing method includes a step of recovering concentrated liquid by subjecting kraft digestion black liquid or soda digestion black liquid to ultrafiltration treatment by using an ultrafilter. A content rate of lignin whose weight average molecular weight is less than 3，000 is 1 to 50% in the concentrated liquid. SELECTED DRAWING: None
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国家林业和草原科学数据中心创建时间：
2023-02-12
