Method for the continuous, dry, non-pressurized regeneration of

Details Method for the continuous, dry, non-pressurized regeneration of Method for the continuous, dry, non-pressurized regeneration of

1985-03-07

1987-05-12

Silbaugh, Jan H.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Process of treating scrap or waste product containing solid...

264 26, 264DIG69, 4251744, 4251748R, 521 455, 528503, C08J 1104, C08L 2100, C08C 1908

Patent

active

046651012

ABSTRACT:
Comminuted salvaged rubber is heated to the reclaiming temperature in a two-stage process such that part of the overall heat required is introduced by microwave heating and the remainder by convectional heating. Material preheated during the first stage is transferred to the second stage in such a way that the relative position of all the particles is maintained with as little change as possible. Since the temperature profile of microwave heating shows a maximum in the interior and a minimum at the periphery, whereas that of convectional heating is just the reverse, the temperature distribution within the material can be evened out to a great extent by combining these two different methods of heating. Since it is no longer necessary in this case to heat the material to such an extent convectionally, it is possible to avoid caking and the formation of deposits, and thus to considerably improve the quality of the reclaimed rubber.

REFERENCES:
patent: 2353362 (1944-07-01), Rudd
patent: 3145088 (1964-08-01), McKay
patent: 3850875 (1974-11-01), Robson
patent: 3873474 (1975-03-01), Ficker
patent: 4242220 (1980-12-01), Sato
patent: 4469817 (1984-09-01), Hayashi et al.
The Miami Herald, Thursday, May 17, 1979, "Goodyear Develops `Instant` Rubber".

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