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    • 1. 发明公开
    • Conversion method
    • Konversionsverfahren
    • EP2033974A1
    • 2009-03-11
    • EP07253520.6
    • 2007-09-06
    • The Queens University of Belfast
    • The designation of the inventor has not yet been filed
    • C08B1/00C12P7/10C13K1/02C08B15/02
    • C12P7/10C07H3/02C08B1/003C08B15/02Y02E50/16Y02E50/17
    • A process is described for the preparation of water-soluble cellulose hydrolysis products, which comprises admixing cellulose with an ionic liquid capable of solvating or dissolving at least some of the cellulose, said ionic liquid being a compound comprised solely of cations and anions and which exists in a liquid state at a temperature at or below 150°C, the cations in said ionic liquid having the general formula:

      in which Z represents a nitrogen or phosphorus atom, R 1 represents a methyl or ethyl group, each of R 2 and R 3 , which may be the same or different, is selected from C 4-8 alkyl, optionally-substituted benzyl, optionally-substituted phenyl, and C 5-7 cycloalkyl, and R 4 represents C 1-8 alkyl, optionally-substituted benzyl, optionally-substituted phenyl or C 5-7 cyclohexyl; in which the optional substituents on a benzyl or phenyl ring are one, two or three substituents selected from C 1-4 alkyl or alkoxy groups, halogen atoms and nitro groups; and treating the resulting solvate or solution with an acid in the presence of water, said acid having a pKa in water of less than 2 at 25°C.
    • 描述了用于制备水溶性纤维素水解产物的方法,其包括将纤维素与能够溶解或溶解至少一些纤维素的离子液体混合,所述离子液体是仅由阳离子和阴离子组成的化合物,其存在 在等于或低于150℃的液态下,所述离子液体中的阳离子具有以下通式:其中Z表示氮或磷原子,R 1表示甲基或乙基,R 2和R 3可以相同或不同,选自C 4-8烷基,任选取代的苄基,任选取代的苯基和C 5-7环烷​​基,R 4表示C 1-8烷基,任选取代的苄基 ,任选取代的苯基或C 5-7环己基; 其中苄基或苯环上任选的取代基是一个,两个或三个选自C 1-4烷基或烷氧基,卤素原子和硝基的取代基; 并在酸存在下用酸处理得到的溶剂化物或溶液,所述酸在25℃下的水中pKa小于2。