BE410084A

BE410084A -

Info

Publication number: BE410084A
Authority: BE

Description

       

   <EMI ID=1.1> 

  
blant à la laine.

  
Dans le brevet principal on a décrit un procédé de production de fibres artificielles ressemblant à la laine

  
 <EMI ID=2.1> 

  
au préalable (selon le procédé de filage utilisé) de composée métalliques, d'acides et, le cas échéant, de soufre, blanchi., et lavées, se trouvant à l'état de cellulose régénérée humide

- M 

  
de préférence fraîchement filée, puis à soumettre les.:. -  fibres décrites ci-dessus à un traitement par. des agents  capables de déplacer l'eau, notamment des liquides orga-  niques, en veillant à ce que les fibres ainsi traitées  contiennent encore ce que l'on appelle l'hydratation

  
 <EMI ID=3.1> 

  
cles du commerce; ce traitement'remplace le séchage usuel.

  
Selon la première addition on a utilisé comme

  
 <EMI ID=4.1> 

  
pouvant être obtenue selon le brevet français No. 778.985.

  
La matière à oase de viscose utilisée dans les brevets précités comme matière première doit être débar- :  rassée du soufre -préalablement au séchage- comme il est 

  
dans

  
décrit/lesdits brevets. 

  
Or, la Demanderesse a trouvé qu'une désulfura-  t'ion ainsi que l'utilisation corrélative de bains de <EMI ID=5.1>  exécute le séchage (voir le brevet principal) en présence  d'une basa volatile. De préférence, on fait passer la marchandise à sécher à travers plusieurs bains à teneur

  
 <EMI ID=6.1> 

  
tant au premier bain des quantités minimes d'ammoniaque.

  
Par cette combinaison de la désulfuration et

  
du séchage on réussit à obtenir une simplification sensible du procédé de production, la marchandise étant de cette manière fortement ménagée.

EXS&#65533;GPIE:

  
On prend une matière à base de viscose, filée selon le procédé du brevet français No. 778.985 cité plus haut, on la lave avec de l'eau et on la soumet,immédiatement après l'avoir débarrassée de l'excès d'eau retenue par.



   <EMI ID = 1.1>

  
wool blant.

  
In the main patent a process for the production of artificial fibers resembling wool has been described.

  
 <EMI ID = 2.1>

  
beforehand (depending on the spinning process used) of metallic compounds, acids and, where appropriate, sulfur, bleached., and washed, in the state of wet regenerated cellulose

- M

  
preferably freshly spun, then to submit the.:. - fibers described above to treatment with. agents capable of displacing water, especially body fluids, ensuring that the fibers thus treated still contain what is called hydration

  
 <EMI ID = 3.1>

  
keys to commerce; this treatment replaces the usual drying.

  
According to the first addition we used as

  
 <EMI ID = 4.1>

  
obtainable according to French patent No. 778,985.

  
The viscose oase material used in the aforementioned patents as a raw material must be freed from sulfur -previously drying- as it is

  
in

  
described / said patents.

  
Now, the Applicant has found that a desulfurization as well as the correlative use of baths of <EMI ID = 5.1> carries out the drying (see the main patent) in the presence of a volatile base. Preferably, the goods to be dried are passed through several baths containing

  
 <EMI ID = 6.1>

  
both in the first bath minimal amounts of ammonia.

  
By this combination of desulfurization and

  
the drying results in a significant simplification of the production process, the goods being in this way greatly spared.

EXS GPIE:

  
We take a viscose-based material, spun according to the process of French patent No. 778,985 cited above, it is washed with water and subjected to it, immediately after having freed it from the excess water retained. through.

Claims

pressure or centrifugation, treatment with ethyl alcohol. We start with an alcohol at 35%. by weight, <EMI ID = 7.1>

that, and the goods are passed immediately, without

no intermediate treatment, through alcohol baths

of increasing concentration and free of ammonia. After

to have passed through the last alcohol bath, consisting of

freed, by pressure or centrifugation, of the part

solvent which is retained and is easy to remove; the residual alcohol is recovered after volatilization in a known manner.

Preferably, we work continuously

by connecting the oains between them by means of too many

so that the alcohol passes through all the baths countercurrent to the commodity to be treated, decreasing

thus its concentration. It was only at the last alcohol bath,

(which is the most diluted and at the same time the first bath crossed by the goods,) that a certain quantity of ammonia is added.

1 [deg.] A modification to the process described in

the main patent, modification which consists in submitting

a material based on non-desulfurized viscose, in the

still wet, to treatment with organic liquid

capable of moving water, adding small amounts

2 [deg.] An execution mode of the specified process

under 1 [deg.] which consists in treating the raw material in several baths with increasing content of agent capable of displacing water, adding to the first bath (therefore having the least concentration of agent capable of displacing a small quantity of volatile base.

able to displace water and ammonia as a base

industry.