Method of nonhazardous removal of paint containing heavy metals

Details Method of nonhazardous removal of paint containing heavy metals Method of nonhazardous removal of paint containing heavy metals

1997-06-09

1998-10-27

Cameron, Erma

Coating processes

With post-treatment of coating or coating material

Chemical agent applied to treat coating

427355, 451 39, 134 4, 134 6, 134 7, 134 38, 588236, 210912, B05D 312

Patent

active

058275746

ABSTRACT:
The present invention involves a method of removing paint containing heavy metal from a surface without the production of hazardous wastes. Specifically, this method involves applying a coating preparation to the heavy metal containing paint prior to its removal from its surface. The preparation contains lead reactive chemicals such as phosphates, metal sulfides and organic sulfides. The preparation may also contain buffers such as magnesium oxide and magnesium hydroxide. These chemicals react with the heavy metals rendering them nonhazardous. The invention also involves the coating preparation itself.

REFERENCES:
patent: 4731125 (1988-03-01), Carr
patent: 5037479 (1991-08-01), Stanforth
patent: 5591116 (1997-01-01), Pierce
patent: 5667696 (1997-09-01), Studer et al.
patent: 5674176 (1997-10-01), Pierce

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