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    • 4. 发明申请
    • FRACTIONATION OF A WASTE LIQUOR STREAM FROM NANOCRYSTALLINE CELLULOSE PRODUCTION
    • 来自纳米晶体纤维素生产的废液流的分离
    • WO2011017797A1
    • 2011-02-17
    • PCT/CA2010/001198
    • 2010-07-28
    • FPINNOVATIONSJEMAA, NaceurPALEOLOGOU, MichaelZHANG, Xiao
    • JEMAA, NaceurPALEOLOGOU, MichaelZHANG, Xiao
    • C01B17/90B01D61/00C08B1/00D21C11/00
    • D21C9/00B01D61/027C01B17/902C08B15/08D21C11/0007
    • During nanocrystalline cellulose (NCC) production, a considerable amount of sulphuric acid is used. After the separation of the NCC, the remaining solution contains sugars and residual sulphuric acid. The sugars are in the monomeric and oligomeric forms. To reduce the cost of NCC production and to produce other added-value products, the spent acid stream can be fractionated into sugar oligomers, sugar monomers, and acid. The acid can be recycled to the NCC manufacturing process after concentration. The sugar monomers and sugar oligomers can be used for the manufacturing of other valuable chemicals. Membrane nanofiltration can be used to achieve this objective. A polymeric membrane with a molecular weight cut-off in the range of 200 Dalton was employed. Using this approach, the majority of the acid was recovered in the permeate while the sugars were concentrated in a smaller stream. The sugar level in the separated acid/permeate stream was only about 3% of the original concentration. A second membrane filtration stage can be used to separate the monomeric from the oligomeric sugars. The two sugar streams can be employed in different applications to produce value-added products.
    • 在纳米晶纤维素(NCC)生产过程中,使用了大量的硫酸。 在分离NCC后,剩余的溶液含有糖和残留的硫酸。 糖是单体和低聚物形式。 为了降低NCC生产成本和生产其他附加值产品,废酸流可以分馏成糖低聚物,糖单体和酸。 浓缩后,酸可以回收到NCC制造过程。 糖单体和糖低聚物可用于制造其他有价值的化学品。 膜纳米过滤可以用来达到这个目的。 使用分子量截止值在200道尔顿范围内的聚合物膜。 使用这种方法,大部分酸在渗透物中回收,而糖被浓缩在较小的流中。 分离的酸/渗透物流中的糖含量仅为原始浓度的约3%。 可以使用第二膜过滤阶段将单体与低聚糖分离。 这两种糖流可用于不同的应用,以产生增值产品。
    • 6. 发明申请
    • LIGNIN RECOVERY AND FURFURAL PRODUCTION FROM BIOMASS PREHYDROLYSATE STREAMS
    • 生物质解氢化物流的木质素回收和糠醛生产
    • WO2017181280A1
    • 2017-10-26
    • PCT/CA2017/050486
    • 2017-04-20
    • FPINNOVATIONS
    • JEMAA, NaceurMAZAR, AdilWAFA AL DAJANI, WaleedPALEOLOGOU, Michael
    • C07D307/50
    • The present invention relates to a method of producing furfural and extracting lignin from a hemi-cellulosic biomass solution comprising a total quantity of C5 sugars, comprising the steps of heating the hemi-cellulosic biomass solution to a temperature of at least about 200°C; acidifying the hemi-cellulosic biomass solution with acid to produce the furfural in vapor phase; and condensing the furfural to recover furfural in solution, wherein the furfural is produced at a total molar yield of at least 70% of moles of furfural produced/the total moles C5 sugars present in the initial hemi-cellulosic biomass solution. Low molecular weight lignin can also be recovered from the hemi-cellulosic biomass solution prior to furfural production by membrane concentration, acidification, coagulation and filtration.
    • 本发明涉及从包含总量的C5糖的半纤维素生物质溶液中生产糠醛和提取木质素的方法,该方法包括以下步骤:将半纤维素生物质溶液加热至温度 至少约200℃; 用酸酸化半纤维素生物质溶液以产生气相糠醛; 和冷凝糠醛以在溶液中回收糠醛,其中糠醛以至少70%产生的糠醛的摩尔数/最初半纤维素生物质溶液中存在的总C5摩尔糖的总摩尔产率产生。 在通过膜浓缩,酸化,凝结和过滤来生产糠醛之前,还可以从半纤维素生物质溶液中回收低分子量木质素。