Use of formaldehyde as a chemical embrittling agent for waste

Details Use of formaldehyde as a chemical embrittling agent for waste Use of formaldehyde as a chemical embrittling agent for waste

1979-07-23

1981-05-05

Dees, Carl F.

Fuel and related compositions

Liquid fuels

Aluminum or heavy metal, other than lead, containing

44 1D, 423DIG18, C10L 902

Patent

active

042656362

ABSTRACT:
The instant invention relates to a method of converting the solid organic fraction of solid waste into a powdered fuel which comprises heating said solid organic fraction in the presence of formaldehyde for a time and at a temperature sufficient to embrittle said solid organic fraction, comminuting said embrittled solid organic fraction to a powder which is less than a predetermined particle size, and recovering said powder.
The solid organic fraction may be separated from the solid waste prior to treatment by the process of this invention or alternatively the solid waste can be treated by the method of this invention and the embrittled organic fraction separated therefrom. Formaldehyde may be added to the solid organic fraction as an aqueous solution, a gas, or solid, e.g. as paraformaldehyde. The embrittling process takes place at a temperature of at least 125.degree. C., preferably from 150.degree. C. to 250.degree. C. and said embrittled solid organic fraction is preferably comminuted to a predetermined particle size of less than 10 mesh.

REFERENCES:
patent: 1554462 (1925-09-01), Prescott et al.
patent: 3961913 (1976-06-01), Brenneman et al.
patent: 4008053 (1977-03-01), Brenneman et al.
Investigation of Advanced Thermal-Chem. Concepts for Obtaining Improved MSW-Derived Products-EPA-600/7-78-143.

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