PROCEDIMENTO PER LA PRECIPITAZIONE DI CARBAMMATO DI CELLULOSA

PCT No. PCT/FI82/00070 Sec. 371 Date Aug. 30, 1983 Sec. 102(e) Date Aug. 30, 1983 PCT Filed Dec. 30, 1982 PCT Pub. No. WO83/02279 PCT Pub. Date Jul. 7, 1983.The present invention concerns a procedure for precipitating cellulose carbamate from an aqueous alkali solution. The solution is brought into...

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Hauptverfasser:	MANDELL LEO, EKMAN KURT, EKLUND VIDAR, TURUNEN OLLI, HUTTUNEN JOUKO
Format:	Patent
Sprache:	ita
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS APPARATUS THEREFOR CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY COMPOSITIONS BASED THEREON DERIVATIVES THEREOF GENERAL METHODS OF ORGANIC CHEMISTRY GENERAL PROCESSES OF COMPOUNDING HETEROCYCLIC COMPOUNDS METALLURGY NATURAL OR ARTIFICIAL THREADS OR FIBRES ORGANIC CHEMISTRY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL POLYSACCHARIDES SPINNING TEXTILES THEIR PREPARATION OR CHEMICAL WORKING-UP THEIR RELEVANT APPARATUS TRANSPORTING WORKING-UP
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Zusammenfassung:	PCT No. PCT/FI82/00070 Sec. 371 Date Aug. 30, 1983 Sec. 102(e) Date Aug. 30, 1983 PCT Filed Dec. 30, 1982 PCT Pub. No. WO83/02279 PCT Pub. Date Jul. 7, 1983.The present invention concerns a procedure for precipitating cellulose carbamate from an aqueous alkali solution. The solution is brought into contact with an aqueous solution of sulphuric acid containing one or several cations selected from the group consisting of Na, Al, Mg, Zn and Ca cations, whereby in the precipitation of cellulose carbamate the advantage is gained that the dry matter content of the fibre can be made high enough.