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    • 5. 发明申请
    • REDISPERSIBLE DRIED NANOCRYSTALLINE CELLULOSE
    • 可重复干燥的纳米晶体纤维素
    • WO2010066036A1
    • 2010-06-17
    • PCT/CA2009/001787
    • 2009-12-08
    • FPINNOVATIONSBECK, StephanieBOUCHARD, JeanBERRY, Richard
    • BECK, StephanieBOUCHARD, JeanBERRY, Richard
    • C30B29/58B29C41/02C08J5/18C08L1/02C30B7/04
    • C08B15/08
    • Dried forms of nanocrystalline cellulose (NCC) with controllable redispersibility in water are provided; lightweight and easily transportable dried acid-form nanocrystalline cellulose which can be resuspended for use in a desired application can be produced by maintaining the humidity content of the NCC within a specific, low, range; evaporated acid-form NCC suspensions with moisture contents below this range are non-dispersible and therefore can be subsequently fixed in permanently dried form; the second form is produced by exchanging the proton of the acid-form NCC for neutral monovalent counterions and freeze-drying the NCC to give a solid product which rapidly disperses when placed in water; properties similar to those of the original suspension are also obtained with a brief sonication treatment.
    • 提供了在水中具有可控再分散性的干燥形式的纳米晶纤维素(NCC); 可以通过将NCC的湿度含量保持在特定的低的范围内来制备可重悬浮以用于所需应用的轻质且容易运输的干酸型纳米晶体纤维素; 水分含量低于该范围的蒸发的酸型NCC悬浮液是不可分散的,因此可以随后固定为永久干燥形式; 通过将酸性NCC的质子交换为中性一价抗衡离子并冷冻干燥NCC以产生当放置在水中时快速分散的固体产物来生产第二种形式; 也可以通过短暂的超声处理获得与原始悬浮液相似的性质。
    • 7. 发明申请
    • CRYSTALLINE SULPHATED CELLULOSE II AND ITS PRODUCTION FROM SULPHURIC ACID HYDROLYSIS OF CELULOSE
    • 水溶性硫酸纤维素II及其生产从硫酸水解溶胶
    • WO2010127451A1
    • 2010-11-11
    • PCT/CA2010/000698
    • 2010-05-04
    • FPINNOVATIONSHASHAIKEH, RaedHU, ThomasBERRY, Richard
    • HASHAIKEH, RaedHU, ThomasBERRY, Richard
    • C08B5/14C08B15/08
    • C08B5/14C08B15/08
    • A method for producing crystalline sulphated cellulose II materials with relatively low degree of polymerization from spent liquors of sulphuric acid (H 2 SO 4 ) hydrolysis of cellulose has been discovered. The method involves: 1) separating the spent liquors from the hydrolysed, acid-insoluble, cellulose I materials by dilution from, for example, a 64% H 2 SO 4 hydrolysis medium to a residual sulphuric acid concentration of 10-50% with 0-40% H 2 SO 4 , followed by settling (or centrifuging) and decanting; 2) adding the diluted spent liquors to water or heating the diluted spent liquors at 30-80°C for ≤ 48 h; and 3) recovering the recrystallized sulphated cellulose II materials with relatively low degree of polymerization either by filtration and washing or by washing and freeze drying. The method can be used to concurrently produce both crystalline, sulphated cellulose I and the crystalline, sulphated cellulose II materials.
    • 已经发现了一种从硫酸(H 2 SO 4)水解纤维素的废液中产生具有相对较低聚合度的结晶硫酸化纤维素II材料的方法。 该方法包括:1)通过从例如64%H 2 SO 4水解介质稀释至10-50%的残留硫酸浓度,用0-40%的浓度从水解的酸不溶性纤维素I材料中分离废液, H2SO4,然后沉降(或离心)和倾析; 2)将稀释的废液加入水中或在30-80℃加热稀释的废液= 48小时; 和3)通过过滤和洗涤或通过洗涤和冷冻干燥来回收具有相对较低聚合度的重结晶硫酸化纤维素II材料。 该方法可用于同时产生结晶,硫酸化纤维素I和结晶硫酸化纤维素II材料。