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公开(公告)号：US20230148352A1
公开(公告)日：2023-05-11
申请号：US17916157
申请日：2021-03-30
发明人： Isko Kajanto
CPC分类号： C07C31/205 , C07C29/80
摘要： A method for recovering mono-propylene glycol from a mixture comprising bio-derived diols and an organic impurity is disclosed. The method may comprise: (ia) separating the organic impurity from mono-propylene glycol in a first distillation process, wherein the first distillation process is carried out at a temperature within the range of 140-200° C. and a pressure within the range of 0.3-1.0 bar; and (ii) recovering mono-propylene glycol. Further is disclosed mono-propylene glycol obtainable by the method.
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公开(公告)号：US11274396B2
公开(公告)日：2022-03-15
申请号：US15930962
申请日：2020-05-13
发明人： Markus Nuopponen , Juha Tamper , Isko Kajanto
摘要： In a method for producing nanofibrillar cellulose, cellulose based fibre material, in which internal bonds in cellulose fibres have been weakened by 5 preliminary modification of cellulose, is subjected to disintegration treatment in form of pulp comprising fibres and liquid. The fibre material is supplied at a consistency higher than 10 wt-%, preferably at least 15 wt-%, to a disintegration treatment where fibrils are detached from the fibre material by joint effect of repeated impacts to the fibre material by fast moving 10 successive elements and the weakened internal bonds of the cellulose fibres. The nanofibrillar cellulose is withdrawn from the disintegration treatment at dry matter which is equal or higher than the consistency of the fibre material.
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公开(公告)号：US09976256B2
公开(公告)日：2018-05-22
申请号：US14891222
申请日：2014-05-15
发明人： Isko Kajanto , Taisto Tienvieri , Juha Tamper
摘要： A method for making nanofibrillar cellulose includes mixing anionized or cationized cellulose fibers and cellulose pulp to a mixture including at least 1% and below 90 wt-% cellulose pulp based on dry weight, and subjecting the mixture to a refiner stage where the anionized or cationized cellulose fibers are at least partly reduced to nanofibrillar cellulose and the cellulose pulp acts as auxiliary pulp, and obtaining a mixture of nanofibrillar cellulose and cellulose pulp from the refining stage. The mixture can be used for making paper by adding it to base pulp.
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公开(公告)号：US20170349670A1
公开(公告)日：2017-12-07
申请号：US15536844
申请日：2015-12-18
发明人： Isko Kajanto , Markus Nuopponen
IPC分类号： C08B15/04 , B01J14/00 , B01J19/00 , G01N27/416
CPC分类号： C08B15/04 , B01J14/00 , B01J19/0006 , B01J2219/00186 , C08B17/06 , G01N27/4168 , Y02P20/582
摘要： A method for controlling the catalytic oxidation of cellulose includes using a heterocyclic nitroxyl compound as catalyst oxidizing cellulose in a reaction mixture comprising liquid medium, the catalyst and hypochlorite as main oxidant analyzing one or more oxidative chlorine species dependent on the hypochlorite concentration of the reaction mixture on line in the reaction mixture or in a gas composition which is in contact with the reaction mixture; and controlling supply of hypochlorite to the reaction mixture on the basis of the analysis.
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公开(公告)号：US20150308429A1
公开(公告)日：2015-10-29
申请号：US14647584
申请日：2013-12-04
CPC分类号： F04C13/001 , B67D7/0277 , F04C2/107 , F04C2/1071 , F04C13/002 , F04C2210/44
摘要： In a method for transporting nanofibrillar cellulose in the form of viscous liquid dispersion, the nanofibrillar cellulose is unloaded from a container (3) through a discharge point (3b) which is the lowermost point with respect to the volume of nanofibrillar cellulose in the container at least at the time of unloading. The nanofibrillar cellulose is unloaded and transported to a target location along a pipe (2) using a progressive cavity pump (P2) operating on a positive displacement principle with the suction side of the pump at a distance from the discharge point (3b). The discharge of the nanofibrillar cellulose is ensured by selecting the distance (L) of the suction side of the pump (P2) from the discharge point (3b) so short that the nanofibrillar cellulose flows from the container (3) by the effect of the pump suction, or pressurizing the nanofibrillar cellulose in the container (3) to such a pressure (p) that it will flow at the selected distance (L) of the suction side from the discharge point by the common effect of the pressure of the nanofibrillar cellulose and the pump suction.
摘要翻译： 在以粘性液体分散体形式输送纳米纤维素纤维素的方法中，纳米纤维素纤维素从容器（3）通过排放点（3b）卸载，排放点（3b）相对于容器中纳米纤维素纤维素的体积为最低点 至少在卸货时。 纳米纤维素纤维素被卸载并且使用在正位移原理上操作的逐排腔泵（P2）沿着管道（2）输送到目标位置，其中泵的吸入侧距离排放点（3b）一定距离。 纳米纤维素纤维素的排出是通过从排出点（3b）中选择泵（P2）的吸入侧的距离（L）来确保的，使得纳米纤维素纤维素通过 泵抽吸或将容器（3）中的纳米纤维素纤维素加压到这样的压力（p），使得它将在吸入侧的选定距离（L）从排放点以纳米纤维的压力的共同作用流动 纤维素和泵抽吸。
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公开(公告)号：US20210229057A1
公开(公告)日：2021-07-29
申请号：US17233192
申请日：2021-04-16
发明人： Isko Kajanto
摘要： The invention relates to a method for treating a nanofibrillar cellulose hydrogel, wherein the method comprises the steps of: providing a nanofibrillar cellulose hydrogel, wherein the nanofibrillar cellulose is oxidized nanofibrillar cellulose, wherein the oxidation has been carried out through N-oxyl mediated catalytic oxidation of cellulose-based raw material, and has at most 50 μmol of aldehyde groups per gram of dry nanofibrillar cellulose; and subjecting the nanofibrillar cellulose hydrogel to a heat treatment.
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公开(公告)号：US10981135B2
公开(公告)日：2021-04-20
申请号：US15538074
申请日：2015-12-21
发明人： Isko Kajanto
摘要： The invention relates to a method for treating a nanofibrillar cellulose hydrogel, wherein the method comprises the steps of: providing a nanofibrillar cellulose hydrogel, wherein the nanofibrillar cellulose is oxidized nanofibrillar cellulose, wherein the oxidation has been carried out through N-oxyl mediated catalytic oxidation of cellulose-based raw material, and has at most 50 μmol of aldehyde groups per gram of dry nanofibrillar cellulose; and subjecting the nanofibrillar cellulose hydrogel to a heat treatment.
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公开(公告)号：US10322196B2
公开(公告)日：2019-06-18
申请号：US15538441
申请日：2015-12-21
发明人： Isko Kajanto
摘要： The invention relates to a method for treating a nanofibrillar cellulose hydrogel, wherein the method comprises the steps of: providing a nanofibrillar cellulose hydrogel; and subjecting the nanofibrillar cellulose hydrogel to a heat treatment, wherein the heat treatment is carried out by transferring the nanofibrillar cellulose hydrogel through at least one heat exchanger or through at least one insulated holding tube, during which heat treatment the nanofibrillar cellulose hydrogel is kept at a predetermined temperature within the range of 110-150° C. for a period of time in the range of 15 seconds to 20 minutes, wherein the pre-determined temperature and period of time are chosen such that the number of viable micro-organisms in the nanofibrillar cellulose hydrogel is reduced by a factor of at least 103.
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公开(公告)号：US20180179703A1
公开(公告)日：2018-06-28
申请号：US15578778
申请日：2016-06-02
发明人： Isko Kajanto , Markus Nuopponen
IPC分类号： D21B1/30 , A61K8/04 , A61K8/73 , A61Q19/00 , C12N5/00 , A61K31/717 , A61K9/06 , C08B15/04 , D21C9/10 , D21C9/02
摘要： A process for producing a nanofibrillar cellulose hydrogel comprises obtaining bleached cellulose pulp fibers and providing an aqueous suspension thereof; and subjecting the cellulose pulp fibers in the aqueous suspension to at least 2 cycles of high pressure mechanical disintegration to obtain a nanofibrillar cellulose hydrogel and thereby reducing the number of viable microorganisms present in the suspension by a factor of at least 102; wherein all steps of the process after obtaining the bleached cellulose pulp fibers are performed under conditions of ISO 8 of ISO 14644-1 cleanroom standards or stricter. A nanofibrillar cellulose hydrogel, a system for producing the same and the use of a disintegrating apparatus are also disclosed.
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公开(公告)号：US20160289894A1
公开(公告)日：2016-10-06
申请号：US15035496
申请日：2014-12-04
发明人： Isko Kajanto , Juha Tamper , Markus Nuopponen , Tarja Sinkko , Taisto Tienvieri
摘要： Method for making modified cellulose products comprises—processing cellulose pulp to modified cellulose pulp at a manufacturing location to increase the susceptibility of fibers to disintegration,—setting the modified cellulose pulp to a suitable dry matter content, and—transporting the modified cellulose pulp at set dry matter content to a location of use, where the modified cellulose pulp is disintegrated to nanofibrillar cellulose.
摘要翻译： 制造改性纤维素产品的方法包括在制造地点将纤维素纸浆加工成改性纤维素纸浆，以增加纤维分解的易感性，将改性纤维素纸浆确定为合适的干物质含量， 干物质含量到使用的位置，其中改性的纤维素纸浆被分解成纳米纤丝纤维素。
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