Process for the treatment of waste material

Details Process for the treatment of waste material Process for the treatment of waste material

1989-05-22

1990-07-17

Woodard, Joye L.

Distillation: processes, thermolytic

With measuring, testing or inspecting

201 25, 201 25, 201 45, 423DIG20, 436 55, C10B 5300

Patent

active

049419528

ABSTRACT:
In the treatment of hydrocarbon-containing waste material, in particular plastic-containing waste material, by pyrolysis, gases containing hydrogen halide compounds which are formed are neutralized by the addition of basic additive material. Since the reacted additive material increases the pyrolysis residue, it is desirable to monitor the controlled feed of the additive material. Therefore, the pH value is measured in the low-boiling pyrolysis oil, which additionally also contains water vapor condensate, and the controlled feed of the additive material is automatically varied as a function of the measurement. The result is that the pollutants are largely, or at least adequately, bound with low consumption of additive material.

REFERENCES:
patent: 4303477 (1981-12-01), Schmidt et al.
patent: 4431618 (1984-02-01), Boward et al.

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