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公开(公告)号：AU2010282167B2
公开(公告)日：2015-02-12
申请号：AU2010282167
申请日：2010-07-28
Applicant: FPINNOVATIONS
Inventor： JEMAA NACEUR , PALEOLOGOU MICHAEL , ZHANG XIAO
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.
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Patent Agency Ranking
公开(公告)号：CA2799798C
公开(公告)日：2015-01-20
申请号：CA2799798
申请日：2011-05-31
Applicant: FPINNOVATIONS
Inventor： KOUISNI LAMFEDDAL , PALEOLOGOU MICHAEL
IPC: C08H7/00
Abstract: A process for the removal of lignin from black liquor comprising, a)oxidizing the black liquor containing lignin to remove total reduced sulphur (TRS), b)acidifying the oxidized black liquor to precipitate lignin and c)filtering precipitated lignin from the acidified black liquor. The filtering is followed by an optional washing of the filtered lignin with water and/or acid.
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公开(公告)号：BRPI0813953A2
公开(公告)日：2014-12-30
申请号：BRPI0813953
申请日：2008-07-24
Applicant: FPINNOVATIONS
Inventor： JEMAA NACEUR , PALEOLOGOU MICHAEL , O'CONNOR BRIAN
Abstract: A method and apparatus for the treatment of pulp mill condensates is described. A hollow fiber contactor, incorporating a hydrophobic membrane, was used to remove several undesirable compounds from pulp mill condensates. For example, TRS compounds and SO2 were efficiently stripped from kraft and sulphite mill evaporator condensates, respectively. Methanol was also removed from kraft mill condensates but at a lower efficiency than TRS. Furthermore, other undesirable compounds found in condensates of pulp mills that contribute to the BOD and COD loading to effluent treatment systems were also removed. These contactors are cost effective since air, vacuum or a suitable solvent or scrubbing solution can be used as the stripping medium to drive off through the membrane several undesirable compounds from the feed solution. The undesirable compounds removed can thus be burned in the recovery boiler, lime kiln or a dedicated boiler.
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公开(公告)号：CA2916012A1
公开(公告)日：2014-12-24
申请号：CA2916012
申请日：2014-06-16
Applicant: FPINNOVATIONS
Inventor： JEMAA NACEUR , PALEOLOGOU MICHAEL
Abstract: The present invention describes a process and system of producing methanol from methanol condensates. In a preferred embodiment the condensates are biomethanol condensates from chemical pulp mills and various waste sources used to produce a purified biomethanol. Pulp condensates are rich in methanol and contain many other contaminants. Presently, most chemical pulp mills, such as Kraft pulp mills use steam stripping to remove and concentrate the methanol and burn the methanol onsite along with the contaminants. A combination of treatments that include air stripping, steam stripping, distillation and reverse osmosis is described to obtain purified biomethanol suitable for sale or use on site.
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公开(公告)号：CL2011000634A1
公开(公告)日：2011-10-14
申请号：CL2011000634
申请日：2011-03-24
Applicant: FPINNOVATIONS
Inventor： JEMAA NACEUR , PALEOLOGOU MICHAEL
Abstract: UN PROCESO PARA LA PRODUCCIÓN DE DIÓXIDO DE CLORO QUE UTILIZA RESIDUOS DE GLICEROL DE PLANTAS DE BIODIESEL COMO UN AGENTE REDUCTOR. ESTE FLUJO DE RESIDUOS NO TRATADOS PUEDE CONTENER OTROS AGENTES REDUCTORES TALES COMO CLORURO DE SODIO Y METANOL, LOS CUALES HAN DEMOSTRADO MEJORAR LA PRODUCCIÓN DE DIÓXIDO DE CLORO. OTROS QUIMICOS PRESENTES EN ESTE FLUJO RESIDUAL NO AFECTAN EL FUNCIONAMIENTO DEL GENERADOR DE DIÓXIDO DE CLORO. SUSTITUIR LOS RESIDUOS DE GLICEROL POR METANOL U OTROS AGENTES REDUCTORES AYUDA A LAS PLANTAS DE PULPA KRAFT A REDUCIR LOS COSTOS DE PRODUCIR DIÓXIDO DE CLORO, MIENTRAS QUE PROPORCIONA UN USO PARA EL FLUJO DE RESIDUOS DE GLICEROL NO TRATADO.
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公开(公告)号：CA2694223A1
公开(公告)日：2009-01-29
申请号：CA2694223
申请日：2008-07-24
Applicant: FPINNOVATIONS
Inventor： JEMAA NACEUR , PALEOLOGOU MICHAEL , O'CONNOR BRIAN
Abstract: A method and apparatus for the treatment of pulp mill condensates is described. A hollow fiber contactor, incorporating a hydrophobic membrane, was used to remove several undesirable compounds from pulp mill condensates. For example, TRS compounds and SO2 were efficiently stripped from kraft and sulphite mill evaporator condensates, respectively. Methanol was also removed from kraft mill condensates but at a lower efficiency than TRS. Furthermore, other undesirable compounds found in condensates of pulp mills that contribute to the BOD and COD loading to effluent treatment systems were also removed. These contactors are cost effective since air, vacuum or a suitable solvent or scrubbing solution can be used as the stripping medium to drive off through the membrane several undesirable compounds from the feed solution. The undesirable compounds removed can thus be burned in the recovery boiler, lime kiln or a dedicated boiler.
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