A NEW PROCESS OF REGENERATING RUBBER.
A European process for regenerating old rubber has for its principle the separation of the caoutache proper contained in vulcanised rubber from the mineral and other matter which have been incorporated into it, such as sulphur, etc. The first operation consists in dissolving the \-ulcanised rubber in one of the usual solvents, using petroleum preferably either alone or with benzine added to it. After treating for a certain time the insoluble matter _s separated by filtering under pressure, or by a centrifugal machine. The solution when separated from the insoluble matter is evaporated to the consistence of syrup under a reduced pressure and is then taken up by acetone. The liquid which is thus obtained is first boiled and then decanted off and the rubber is again taken up by an alcoholic soda solution. After boiling and pouring off a second time, the rubber is treated with boiling alcohol. After the alcohol is taken off, the rubber is washed with water and then dried by super-heated steam, which removes the last trace of alcohol and water it may contain. .
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Auckland Star, Volume XXXVII, Issue 72, 24 March 1906, Page 3
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185A NEW PROCESS OF REGENERATING RUBBER. Auckland Star, Volume XXXVII, Issue 72, 24 March 1906, Page 3
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