PL2271B1

PL2271B1 - Improvements in the manufacture of cellulose derivatives.

Info

Publication number: PL2271B1
Application number: PL2271A
Authority: PL
Filing date: 1922-08-08
Publication date: 1925-07-31

Description

Wynalazek niniejszy dotyczy wyrobu wiskozy.Znaleziono, ze w wyrobie wiskozy ksan- togenizacje celulozy alkalicznej mozna wy¬ konac z wielkiem powodzeniem, gdy sie wprowadza celuloze do organicznego roz- czynnika, jak np. do benzolu lub do in¬ nych cieczy organicznych, które rozpuszcza¬ ja sie lub równomiernie mieszaja sie z dwusiarczkiem wegla, Znaleziono, ze tym sposobem reakcja ksantogenetyczna moze byc ulatwiona i wiecej ujednostajniona, przyczem rozczynnik sprawia, ze dwusiar¬ czek wegla przenika równo i dokladnie celuloze alkaliczna i scisle laczy sie z kaz¬ da jej czastka, co zmniejsza sklonnosc do umiejscowiania reakcji, zabezpiecza od u- tleniania i przeciwdziala powstawaniu cie¬ pla tak, ze mozna utrzymac nizsza tempe¬ rature reakcji. A wiec przy uzyciu benzolu lub innych cieczy organicznych, jak to wy¬ zej wspominalismy, drobine celulozy mozna lepiej zabezpieczyc od degradacji, tak ze otrzymane produkty wiskozy nadaja sie do produkcji rozczynów o znacznie wiek¬ szej ciagliwosci, a produkty techniczne ta¬ kie, jak sztuczny jedwab, filmy i t. d. moga byc otrzymane z wiskozy odpowiednio wyz¬ szej jakosci i mechanicznej mocy.Zastosowanie takie organicznych roz- czynników moze sie nadawac zgodnie z wynalazkiem niniejszym do dowolnego pro¬ cesu w wyrobie wiskozy, bez wzgledu na to, czy proces rozwija dojrzewanie ksanto- genizowanej celulozy lub tez nie. Rozczyn- niki moga byc zreszta uzyte ze szczególnakorzyscia w procesie specjalnym obmyslo¬ nym tutaj dla wyrobu specjalnej wiskozy o wysokim skladzie czasteczkowym, gdzie drobiny celulozy lacza sie w wieksze kon¬ glomeraty, dzieki czemu mozna sie obyc bez zwyklego dojrzewania ksantogenizacji celulozy. Zgodnie z tym specjalnym pro¬ cesem, obmyslonym przez wynalazce ce¬ luloze lub produkty jej przemiany pod¬ daje sie: 1) dzialaniu alkaljów o stezeniu o- kolo 15%! Ttfzwyz (najlepiej 20 — 25% lub wiecej) w ilosci nie wiekszej od dwóch dro¬ bin (na^ lepikj okolo 1 drobiny) alkaljów na drobine celulozy fC6 H10 0%); 2) dzialaniu dwusiarczku wegla uzytego w ilosci nie wiekszej niz % drobiny, naprz. %— PLThe present invention relates to a viscose product. It has been found that in a viscose product, the xanthenisation of alkaline cellulose can be carried out with great success when cellulose is introduced into an organic medium such as benzol or other organic liquids which dissolve ¬ it mixes or evenly mixes with the carbon disulphide, It has been found that in this way the xanthogenetic reaction can be facilitated and more uniform, while the excipient makes the carbon disulphide penetrate evenly and accurately the alkaline cellulose and tightly binds to each of its particles which reduces the propensity to locate the reaction, prevents oxidation and prevents heat formation so that the reaction temperature can be kept lower. So when using benzene or other organic liquids, as mentioned above, the cellulose particles can be better protected from degradation, so that the obtained viscose products are suitable for the production of solutions with much greater ductility, and technical products such as rayon, films, etc., may be obtained from viscose of higher quality and mechanical strength, respectively. The use of such organic agents may be suitable in accordance with the present invention for any process in the manufacture of viscose, whether or not the process develops maturation of xanthogenized cellulose or not. The excipients can moreover be used in particular in the special process devised here for the production of a special viscose with a high molecular composition, where the cellulose particles are combined into larger conglomerates, so that the usual maturation of the cellulose xanthogenization can be dispensed with. According to this special process, devised by the invention, the cellulose or its transformation products are subjected to: (1) the action of an alkali concentration of about 15%! Ttfzm (preferably 20-25% or more) in an amount no greater than two yeasts (about 1 sticky) of alkali per cellulose grain fC6H10 0%); 2) the action of carbon disulfide used in an amount not greater than% of the particles, e.g. % - PL

Claims

Claims 1. A process for the manufacture of viscose, characterized by xanthogenization of cellulose, either in benzene or in another organic excipient suitable for dissolution or homogeneous mixing with carbon disulfide.

2. The method of producing viscose, according to claim 1, characterized by the fact that xanthogenization is also matured, either in an organic solution or in a solution as described here *

3. The method of producing viscose according to claims A process as claimed in any one of claims 1 and 2, characterized in that cooling is used during xanthenization activities.

4. A method of producing high-fine viscose, in which cellulose particles are combined into larger cellulose conglomerates without the need for xanthogenate maturation, characterized by the fact that cellulose or its similar transformation product, combined with 3-caustic alkalis in an amount not greater than about 2 of particles (preferably about 1 particle) of alkali to a grain of cellulose FCOH10 00) and in a concentration of approx. 15% upwards (preferably from 20-50% or more) is subjected to the action of benzol or other organic excipient mentioned above carbon sulphide, used in an amount no greater than 2 molecules, e.g.% - 3 - 5 molecules per cellulose grain, whereby the xanthogenization activity is performed by or without the use of cooling.

5. A method according to claim 1, 2, 3 or 4, characterized in that in the formation of alkaline cellulose, cellulose or its transformed product is subjected to the action of agents suitable for chemically combining water in benzol or in other organic excipients, and by way of allowing the principle to be added or formed more tightly to link either chemically or physically with cellulose, since these factors may themselves, by combining them with water, form wholly or partially alkaline in cellulose, or may serve only for chemical ¬ go connection and removal of water. Henry Dreyfus, Deputy: L Myszczynski, patent attorney. Print by L. Boguslawski; Warsaw. PL