Process for treatment of organic waste

Details Process for treatment of organic waste Process for treatment of organic waste

2007-10-02

2007-10-02

Caldarola, Glenn (Department: 1764)

Mineral oils: processes and products

Chemical conversion of hydrocarbons

C208S117000, C208S428000, C585S241000

Reexamination Certificate

active

10533415

ABSTRACT:
The invention provides a multi-stage process for the treatment of organic waste comprising drying said waste to reduce the water content to below 15%; subjecting said dried waste to a thermochemical liquefaction process in the presence of a recirculating solvent medium at a temperature of about 275° C. to 375° C. and a pressure of up to 10 atmospheres, thereby obtaining gaseous, liquid and solid products; separating the formed slurry product from condensable gas, water and other liquid fractions boiling out at up to 250° C.; transferring said slurry product obtained from thermal extraction from step c to a pyrolysis apparatus and treating the same at a temperature of about 350° C. to 500° C. to cause additional thermal destruction of unconvertible organic matter of feed material and heavy liquid fractions obtained is step c and their evaporation and removal from pyrolysis apparatus; separating vapor products from condensable oil products; vacuum distillation of oil products from step c for the removal of fractions having a boiling temperature of between 250° C. and 350° C.; and recirculating solvent medium for step b.

REFERENCES:
patent: 4089773 (1978-05-01), Espenscheid
patent: 5865956 (1999-02-01), Bridle et al.

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