KRAFT LIGNIN PURIFICATION METHOD

• Main Authors: MORI YASUO, ICHIMURA KENTA
• Format: Patent
• Language: English; Japanese
• Published: 29.11.2023
• Subjects: ADHESIVES; APPARATUS THEREFOR; CHEMISTRY; COMPOSITIONS BASED THEREON; DERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS; DYES; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; PAPER-MAKING; POLISHES; PRODUCTION OF CELLULOSE; PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCESFROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; TEXTILES; THEIR PREPARATION OR CHEMICAL WORKING-UP

To provide a kraft lignin purification method which inhibits adhesion to containers and the like and allows for shortened filtration time.SOLUTION: In one aspect, a kraft lignin purification method includes the step of stirring a mixture including kraft lignin, water, and surfactants at 60 to 100°C, wherein the surfactants include a surfactant of the following group (A) and/or a surfactant of the following group (B). The group (A) consists of polymer surfactants with a weight average molecular weight of 2,000-300,000 and the group (B) consists of sulfate-based anionic surfactants excluding the group (A).SELECTED DRAWING: None 【課題】容器等への付着が抑制され、且つろ過の短時間化が可能なクラフトリグニンの精製方法を提供すること。【解決手段】本開示の一側面は、クラフトリグニンと、水と、界面活性剤とを含む混合物を６０～１００℃で攪拌する工程を備え、界面活性剤が、下記（Ａ）群の界面活性剤及び下記（Ｂ）群の界面活性剤のうち少なくとも一種を含む、クラフトリグニンの精製方法である。（Ａ）群：重量平均分子量２，０００～３００，０００の高分子型界面活性剤（Ｂ）群：（Ａ）群以外の硫酸塩型アニオン界面活性剤【選択図】なし