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1. (WO2017178532) PROCESS FOR SPINNING DISSOLVED CELLULOSE
Latest bibliographic data on file with the International Bureau    Submit observation

Pub. No.: WO/2017/178532 International Application No.: PCT/EP2017/058786
Publication Date: 19.10.2017 International Filing Date: 12.04.2017
IPC:
D01F 2/02 (2006.01) ,D01F 13/02 (2006.01) ,C08B 1/00 (2006.01)
D TEXTILES; PAPER
01
NATURAL OR ARTIFICIAL THREADS OR FIBRES; SPINNING
F
CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES, OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
2
Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof
02
from solutions of cellulose in acids, bases, or salts
D TEXTILES; PAPER
01
NATURAL OR ARTIFICIAL THREADS OR FIBRES; SPINNING
F
CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES, OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
13
Recovery of starting material, waste material, or solvents during the manufacture of artificial filaments or the like
02
of cellulose, cellulose derivatives, or proteins
C CHEMISTRY; METALLURGY
08
ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
B
POLYSACCHARIDES; DERIVATIVES THEREOF
1
Preparatory treatment of cellulose for making derivatives thereof
Applicants: TREETOTEXTILE AB[SE/SE]; Norra Villavägen 17 237 34 BJÄRRED, SE
Inventors: HEDLUND, Artur; SE
KÖHNKE, Tobias; SE
Agent: AWA SWEDEN AB; Box 5117 200 71 MALMÖ, SE
Priority Data:
16165371.214.04.2016EP
Title (EN) PROCESS FOR SPINNING DISSOLVED CELLULOSE
(FR) PROCÉDÉ DE FILAGE DE CELLULOSE DISSOUTE
Abstract:
(EN) The present invention relates to a process for forming cellulose fibers or film from dissolved cellulose. The process comprises the steps of: dissolving cellulose in an aqueous coagulation sodium salt solution to provide a cellulose spin dope; extruding the cellulose spin dope into a coagulation bath liquid comprising an aqueous coagulation sodium salt solution to provide cellulose fibers or film; withdrawing a portion of the coagulation bath comprising coagulation sodium salt and sodium hydroxide (NaOH); cooling the withdrawn portion of the coagulation bath to precipitate solid coagulation sodium salt to recover sodium hydroxide (NaOH) substantially free from the coagulation salt; and using at least a portion of the recovered sodium hydroxide (NaOH) in dissolving the cellulose to provide the cellulose spin dope.
(FR) La présente invention concerne un procédé de formation de fibres ou de films de cellulose à partir de cellulose dissoute. Le procédé comprend les étapes suivantes : la dissolution de la cellulose dans une solution aqueuse de sel de sodium de coagulation pour obtenir une solution à filer de cellulose; l'extrusion de la solution à filer de cellulose dans un liquide de bain de coagulation comprenant une solution aqueuse de sel de sodium de coagulation pour fournir des fibres ou un film de cellulose; le retrait d'une partie du bain de coagulation comprenant du sel de sodium de coagulation et de l'hydroxyde de sodium (NaOH); le refroidissement de la partie retirée du bain de coagulation pour précipiter le sel de sodium de coagulation solide pour récupérer de l'hydroxyde de sodium (NaOH) sensiblement exempte du sel de coagulation; et l'utilisation d'au moins une partie de l'hydroxyde de sodium récupéré (NaOH) dans la dissolution de la cellulose pour obtenir la solution à filer de cellulose.
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)