AT75253B

AT75253B - Process for processing parchment paper waste.

Info

Publication number: AT75253B
Authority: AT
Inventors: Conrad Dr Bartsch; Alfred Lutz
Original assignee: Conrad Dr Bartsch; Alfred Lutz
Priority date: 1914-05-30
Filing date: 1915-11-30
Publication date: 1919-01-25

Description

  

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  Verfahren zur Aufbereitung von   Pergamentpapierabfällen.   



   Der bei der Herstellung von Pergamentpapier entstehende   Ausschuss,   ebenso wie das von den   Altpapierhändlern   ausgerichtete Pergamentpapier bildet zur Zeit einen lästigen Abfall, dessen man sich meist dadurch entledigt, dass man ihn verbrennt. Bis jetzt war es nämlich nicht möglich, diese Abfälle, sowie dies bei den   Papierabfällen   sonst üblich ist, wieder in Papiorbrei zu verwandeln und daraus Papier herzustellen. Dabei handelt es sich hier um nicht   unbeträchtliche   Mengen und es ist um so mehr erwünscht, diese wieder verarbeiten zu   können.   als Pergamentpapier stets aus bestem Fasermaterial hergestellt ist.

   Nach dem vorliegenden Verfahren ist es   liun möglicll, Pergamentpapier wieder   in   Faserbrei   umzuwandeln, ohne dass die Faser irgendwie beschädigt wird. Das Verfahren besteht darin, dass die Pergamentabfälle gegebenenfalls nach geeigneter Vorbehandlung mit oxydierenden Stoffen behandelt und dann in passenden mechanischen Vorrichtungen zerfasert werden. 

**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.



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  Process for processing parchment paper waste.



   The scrap resulting from the manufacture of parchment paper, as well as the parchment paper sold by the waste paper dealers, is currently an annoying waste, which is usually disposed of by burning it. Until now it has not been possible to convert this waste, as is usual with paper waste, back into paper pulp and to make paper from it. The quantities involved are not inconsiderable and it is all the more desirable to be able to process them again. as parchment paper is always made from the best fiber material.

   With the present method it is now possible to convert parchment paper back into pulp without damaging the fiber in any way. The process consists in treating the parchment waste, if necessary after suitable pretreatment, with oxidizing substances and then shredding it in suitable mechanical devices.

** WARNING ** End of DESC field may overlap beginning of CLMS **.

Claims

One proceeds, for example, in the following way: The parchment paper to be shredded is brought into a vat and doused with dilute chlorine lime solution or dilute persulfuric acid, whereupon the whole thing is left to stand. The duration of the action depends on the concentration of the solution used. As soon as the parchment paper can be easily torn and crushed by kneading between the fingers, the action of the chemical substance used has progressed sufficiently to allow the material to be frayed in a mill, kneading machine, dutchman, etc. in the usual way. The reaction can be accelerated by adding heat, but this is not absolutely necessary.

Furthermore, nothing stands in the way of allowing the mechanical action of the kneader, pan mill, etc., to take place simultaneously with the chemical treatment. For example, a chlorinated lime solution with a content of 1 "/ n of effective chlorine is sufficient for the preparation of parchment paper of medium thickness PATENT CLAIM: Process for processing parchment paper waste, characterized in that the waste is treated with oxidizing substances, such as chlorinated lime, persulfuric acid or the like, and then shredded in pan mills, kneading machines, Dutch or similar defibering machines. ** WARNING ** End of CLMS field may overlap beginning of DESC **.