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公开(公告)号：US20200299864A1
公开(公告)日：2020-09-24
申请号：US16754965
申请日：2018-10-08
摘要： The invention shows a spin-up device (11, 51) and a method for spinning up a spinning device (1, 101) for the continuous extrusion of molded bodies (3) from a spinning solution (6), containing a solvent and cellulose dissolved in the solvent, wherein the molded bodies are extruded from the spinning solution (6) through spinnerets (7) of the spinning device (1, 101) in the form of a loose spinning curtain (2), the molded bodies (3) of the loose spinning curtain (2) are combined into a molded body bundle (4) after the extrusion, and the molded body bundle (4) is, in a further step, fed to a draw-off member (10) of the spinning device (1, 101) in order to start a continuous extrusion of the molded bodies (3). In order to make the spin-up method simpler in terms of process technology and more reproducible, it is proposed to increase the tensile strength of at least some areas of the molded bodies (3) of the loose spinning curtain (2) after their extrusion and before combining them into a molded body bundle (4).
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公开(公告)号：US20220387905A1
公开(公告)日：2022-12-08
申请号：US17771348
申请日：2020-10-21
摘要： A process (100) for the recovery of solvent (1) from solvent-containing cellulosic particles (2) is shown, the process comprising the steps: a) extracting the solvent (1) from the cellulosic particles (2) by means of a liquid extraction medium (3), thereby obtaining a solvent-enriched extraction medium (5), and b) obtaining the recovered solvent (6) from the solvent-enriched extraction medium (5). In order to improve the efficiency of the process, it is proposed that in step a) the solvent (1) is extracted from the cellulosic particles (2) in a continuous flow extraction reactor (4), wherein the extraction medium (3) continuously flows through the extraction reactor (4) to extract the solvent (1) from the cellulosic particles (2).
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公开(公告)号：US11519100B2
公开(公告)日：2022-12-06
申请号：US16962207
申请日：2019-01-14
IPC分类号： D01F2/00 , D01F2/06 , B29C48/00 , B29C48/88 , B29C48/05 , C08J11/08 , D01D1/02 , D01D5/06 , D01F13/02 , B29B17/04 , D01F2/02 , B29K1/00 , B29K105/26
摘要： Method of manufacturing a cellulose-regenerated-molded body, wherein the method comprises supplying a starting material which is manufactured by a lyocell-method and which comprises cellulose, which is manufactured by solving a cellulose source in a solvent for manufacturing a spinning mass, by extruding the spinning mass and by subsequently precipitating in a spinning bath, solving the starting material which comprises cellulose, in a solvent for manufacturing a spinning mass, and extruding, and subsequently precipitating the spinning mass in a spinning bath, wherein thereby the molded body is obtained.
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公开(公告)号：US12070701B2
公开(公告)日：2024-08-27
申请号：US17771348
申请日：2020-10-21
CPC分类号： B01D11/0219 , B01D11/0292 , D01F13/02
摘要： A process (100) for the recovery of solvent (1) from solvent-containing cellulosic particles (2) is shown, the process comprising the steps: a) extracting the solvent (1) from the cellulosic particles (2) by means of a liquid extraction medium (3), thereby obtaining a solvent-enriched extraction medium (5), and b) obtaining the recovered solvent (6) from the solvent-enriched extraction medium (5). In order to improve the efficiency of the process, it is proposed that in step a) the solvent (1) is extracted from the cellulosic particles (2) in a continuous flow extraction reactor (4), wherein the extraction medium (3) continuously flows through the extraction reactor (4) to extract the solvent (1) from the cellulosic particles (2).
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