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    LIGNIN DEPOLYMERIZATION PROCESS USING CHEMICALS RECOVERABLE BY THE KRAFT RECOVERY CYCLE
    41.
    发明专利
    LIGNIN DEPOLYMERIZATION PROCESS USING CHEMICALS RECOVERABLE BY THE KRAFT RECOVERY CYCLE 未知

    公开(公告)号：CA3062705A1

    公开(公告)日：2018-11-15

    申请号：CA3062705

    申请日：2018-05-08

    Applicant: FPINNOVATIONS

    Inventor： PALEOLOGOU MICHAEL ,  AHMAD ZAID ,  XU CHUNBAO

    IPC: C08J11/12 ,  C07G1/00 ,  C08H7/00

    Abstract: The present relates to a process for the depolymerization of lignin using chemicals recoverable by the soda or kraft mill recovery cycles. The process involves the use of sodium hydroxide or white liquor to depolymerize lignin in black liquor or other lignins (e.g. hydrolysis lignin, kraft lignin) by conducting the reaction at 170-250 °C for up to 3 hours in the presence or absence of a co-solvent and a capping agent. The depolymerized lignin is then obtained by acidifying the reaction products to a low pH to precipitate the de-polymerized lignin, followed by particle coagulation, cake filtration and washing with acid and water to obtain a purified depolymerized lignin product.

    PROCESS FOR PRODUCING AN ANIONIC LIGNIN COPOLYMER UNDER AQUEOUS ACID CONDITIONS
    42.
    发明专利
    PROCESS FOR PRODUCING AN ANIONIC LIGNIN COPOLYMER UNDER AQUEOUS ACID CONDITIONS 未知

    公开(公告)号：CA3055614A1

    公开(公告)日：2018-09-13

    申请号：CA3055614

    申请日：2018-03-07

    Applicant: FPINNOVATIONS ,  UNIV LAKEHEAD

    Inventor： FATEHI PEDRAM ,  KONG FANGONG ,  WANG SHOUJUAN ,  PRICE JACQUELYN ,  PALEOLOGOU MICHAEL

    IPC: C08H7/00 ,  C02F1/56 ,  C02F11/14

    Abstract: An acidic water-based process was developed for the synthesis of anionic lignin copolymers with adjustable MW, thermal stability and solubility in water. The anionic lignin copolymer described herein comprises: a molecular weight of 5,000 to 7.4 X 105 g/mol; and a charge density of -1 to -7.2 meq/g. The anionic lignin copolymers described herein which have a molecular weight range of 000-50,000 g/mol can be used as dispersants of negatively charged molecules or particles in numerous process or wastewater streams (e.g. concrete admixtures, gypsum slurries, textile dye) while such copolymers in a molecular weight range of 90,000-740,000 g/mole can be used as flocculants of positively charged molecules or particles in numerous process and wastewater streams including industrial and municipal systems and sludge dewatering in the textile dye, pulp & paper, mining and oil industries.

    LIGNIN RECOVERY AND FURFURAL PRODUCTION FROM BIOMASS PREHYDROLYSATE STREAMS
    44.
    发明专利
    LIGNIN RECOVERY AND FURFURAL PRODUCTION FROM BIOMASS PREHYDROLYSATE STREAMS 未知

    公开(公告)号：CA3018578A1

    公开(公告)日：2017-10-26

    申请号：CA3018578

    申请日：2017-04-20

    Applicant: FPINNOVATIONS

    Inventor： JEMAA NACEUR ,  MAZAR ADIL ,  WAFA AL DAJANI WALEED ,  PALEOLOGOU MICHAEL

    IPC: C07D307/50

    Abstract: 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.

    METHOD FOR RECOVERING AN ACID FROM ACID/SUGAR SOLUTIONS
    45.
    发明专利
    METHOD FOR RECOVERING AN ACID FROM ACID/SUGAR SOLUTIONS 未知

    公开(公告)号：CA2981729A1

    公开(公告)日：2016-10-27

    申请号：CA2981729

    申请日：2016-04-20

    Applicant: FPINNOVATIONS

    Inventor： JEMAA NACEUR ,  PALEOLOGOU MICHAEL ,  MAHMOOD TALAT

    IPC: C13K1/04 ,  C01B7/07 ,  C01B17/90 ,  C01B25/234 ,  C07C51/47 ,  D21C11/00

    Abstract: Acid hydrolysis of biomass is an important step for releasing the component sugars before converting them to fuels and/or biochemicals. During such a process, a significant amount of mineral acid, such as sulfuric acid, is used. In most cases, the residual acid is neutralized with lime before the sugar conversion step. By doing so, a waste calcium sulphate stream is generated and sent to disposal. The efficient separation of acid from the sugars would allow the recycle of the acid and make the entire process more economically viable. We found that a resin bed packed with an acid retardation resin can be used to achieve an efficient separation (i.e. 98.5% recovery of the acid) of the sulfuric acid from the sugars. The resin bed can be simply regenerated with water.

    FRACTIONATION OF A WASTE LIQUOR STREAM FROM NANOCRYSTALLINE CELLULOSE PRODUCTION
    49.
    发明专利
    FRACTIONATION OF A WASTE LIQUOR STREAM FROM NANOCRYSTALLINE CELLULOSE PRODUCTION 未知

    公开(公告)号：CA2767386C

    公开(公告)日：2013-02-05

    申请号：CA2767386

    申请日：2010-07-28

    Applicant: FPINNOVATIONS

    Inventor： JEMAA NACEUR ,  PALEOLOGOU MICHAEL ,  ZHANG XIAO

    IPC: C01B17/90 ,  B01D61/00 ,  C08B1/00 ,  D21C11/00

    Abstract: 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.

    PROCESS FOR PRODUCING CHLORINE DIOXIDE USING WASTE GLYCEROL FROM A BIODIESEL PLANT
    50.
    发明专利
    PROCESS FOR PRODUCING CHLORINE DIOXIDE USING WASTE GLYCEROL FROM A BIODIESEL PLANT 未知

    公开(公告)号：CA2734867C

    公开(公告)日：2012-01-24

    申请号：CA2734867

    申请日：2009-09-22

    Applicant: FPINNOVATIONS

    Inventor： JEMAA NACEUR ,  PALEOLOGOU MICHAEL

    IPC: C01B11/02 ,  C10G3/00

    Abstract: A process for chlorine dioxide production uses waste glycerol from biodiesel plants as a reducing agent. This un-treated waste stream may contain other reducing agents such as sodium chloride and methanol which were found to enhance the chlorine dioxide production. Other chemicals present in this waste stream did not affect the operation of the chlorine dioxide gen-erator. Substituting the waste glycerol for methanol or other reducing agents helps kraft pulp mills in reducing the cost of produc-ing chlorine dioxide while providing a use for the untreated waste glycerol stream.

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