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首页> 外国专利> Process for preparing sulfometilada Kraft lignin, which comprises: Recovery of Kraft lignin by acid precipitation, Modification of Kraft lignin with SODIUM SULFITE and Formaldehyde, and Recovery of sulfometilada Kraft lignin from Kraft lignin sulfomethyl lyophilization; Ada; and their use as depresante mineral

Process for preparing sulfometilada Kraft lignin, which comprises: Recovery of Kraft lignin by acid precipitation, Modification of Kraft lignin with SODIUM SULFITE and Formaldehyde, and Recovery of sulfometilada Kraft lignin from Kraft lignin sulfomethyl lyophilization; Ada; and their use as depresante mineral

机译：制备磺基硫酸盐硫酸盐木质素的方法，包括：酸沉淀法回收硫酸盐木质素;用亚硫酸钠和甲醛对硫酸盐木质素进行改性;以及从硫酸盐木质素磺甲基冻干法中回收硫酸镁。艾达以及它们用作低等矿物

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Process for the preparation of Kraft lignin sulfometilada characterised in that it comprises at least the following Stages: Recovery of lignin: at this stage the Kraft lignin precipitated by acidification of Kraft Black Liquor, which is added with an Acid. Operation between 20 - 50% V / V, pH is between 2.0 - 3.0 and the temperature between 20 - 50 degrees Celsius.Once achieved the Reaction pH is left at Rest for 24 h, then the deposited lignin is filtered, washed and dried for 72 h to 36 - 35 - 45 degrees; Chemical Modification of Kraft lignin, lignin recovered is recovered through a reaction of functionalized sulfometilaciu00f3n C On SODIUM SULFITE and Formaldehyde at a reaction temperature between 130 to 160 Degrees for 3 - 6 h,Where the SODIUM SULFITE concentration varies between 20 - 50% WEIGHT / Weight with a SODIUM SULFITE / formaldehyde molar ratio of 0.7 and solid / liquid ratio of 5: 1; and Recovery of Kraft lignin sulfometilada: at the end of the reaction sulfometilaciu00f3n, lignin is sulfometilada Lyophilized for 18 - 30 h at a temperature between 30 to 83 Degrees And a pressure range from 0.20 to 0.37 mbar.Where is sulfometilada lignin in the form of dust with a Water content between 2 - 5%. In addition, the application aims to protect the sulfometilada Kraft lignin obtained from the process previously described and the use of such sulfometilada Kraft lignin.
机译：制备硫酸盐木质素的方法，其特征在于它至少包括以下步骤：回收木质素：在这一阶段，通过酸化硫酸盐黑液沉淀出硫酸盐木质素，并加入酸。在20-50％V / V之间运行，pH在2.0-3.0之间，温度在20-50摄氏度之间。一旦达到反应，将pH静置24小时，然后过滤，洗涤和干燥沉积的木质素持续72 h至36-35-45度;硫酸盐对木质素的化学改性，回收的木质素是通过功能化的磺胺嘧啶在磺化钠和甲醛上的反应在130至160度的温度下反应3至6小时而回收的，其中亚硫酸钠的浓度在20％至50％之间变化重量/重量，亚硫酸钠/甲醛的摩尔比为0.7，固体/液体的比为5：1;硫酸盐木质素的合成和回收：在磺胺嘧啶的反应结束时，木质素在30至83度的温度和0.20至0.37 mbar的压力下冻干18-30小时。含水量在2-5％之间的粉尘形式。另外，本申请旨在保护由前述方法获得的磺基磺化硫酸盐木质素和此类磺基磺化硫酸盐木质素的用途。

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