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    • 71. 发明授权
    • Method for obtaining cellulose from biomass comprising lignocellulose
    • 从包含木素纤维素的生物质中获得纤维素的方法
    • US09011640B2
    • 2015-04-21
    • US13263575
    • 2010-02-25
    • Rudolf PattAndreas Kreipl
    • Rudolf PattAndreas Kreipl
    • D21C11/00D21C3/02D21C3/20D21C3/22D21C5/00
    • D21C3/02D21C3/20D21C3/222D21C5/00D21C11/0007
    • The invention relates to a method for obtaining cellulose by separating lignin from a biomass comprising lignocellulose in the form of plants or plant parts, wherein the biomass comprising lignocellulose is solubilized in a boiler in an alkaline medium comprising alkanol amine, and dissolved lignin is separated from the resulting raw cellulose. Said method is characterized in that the biomass comprising lignocellulose is not from a wood source, and is solubilized at a temperature of less than approximately 170° C. in a solubilizing agent based on alkanol amine and water, wherein the weight ratio of alkanol amine to water is set to 80:20 to 20:80, and raw cellulose thus produced is separated from the waste lye using a typical method. Said method is particularly advantageous for obtaining cellulose from annual plants, particularly wheat straw. The method is advantageously improved in that the solubilization takes place in the presence of a catalyst, particularly of anthrachinon. An advantageous bleaching process may be performed subsequently. Said method is characterized by great economic efficiency, particularly due to the high reclamation rates of the alkanol amine used, and leads to lower environmental impact in wastewater, and to reduced disposal costs. The design of the method leads to a greater yield of cellulose and largely prevents degradation of alkanol amine, particularly monoethanol amine (MEA).
    • 本发明涉及通过从包含植物或植物部分形式的木质纤维素的生物质中分离木质素来获得纤维素的方法,其中包含木质纤维素的生物质被溶解在包含链烷醇胺的碱性介质中的锅炉中,并将溶解的木质素从 所得的原纤维素。 所述方法的特征在于,包含木质纤维素的生物质不是来自木材源,并且在基于烷醇胺和水的增溶剂中在小于约170℃的温度下溶解,其中链烷醇胺与 水的浓度设定为80:20〜20:80,使用典型的方法将由此制得的生纤维素与废碱液分离。 所述方法特别有利于从一年生植物,特别是小麦秸秆中获得纤维素。 该方法有利地得到改进,因为溶解在催化剂,特别是蒽的存在下进行。 随后可以进行有利的漂白过程。 所述方法的特点是经济效益高,特别是由于所用链烷醇胺的回收率高,导致废水对环境的影响较小,处理成本降低。 该方法的设计导致更大的纤维素产率,并且大大地防止链烷醇胺,特别是单乙醇胺(MEA)的降解。