Silver coated particles and a process for preparing them

Details Silver coated particles and a process for preparing them Silver coated particles and a process for preparing them

1980-03-27

1982-10-12

Silverberg, Sam

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

252447, 252463, 252476, 427217, 75121, 549534, B01J 2118, C07D30104

Patent

active

043537413

ABSTRACT:
Silver coated particles having high concentrations of metallic silver are produced which are useful in forming alloys with metals such as mercury. The process comprises admixing carrier particles with an aqueous solution of a silver salt to form a slurry. A hydrazine compound is added to the slurry to precipitate metallic silver on the carrier particles in a medium which becomes increasingly acidic. Silver coated particles having a metallic silver content up to 90 percent by weight of the coated particle can be produced in a single impregnation under conditions which prevent the formation of explosive by-products such as silver nitride. The silver coated particles are particularly suitable for the recovery of metals such as mercury from fluids.

REFERENCES:
patent: 4126582 (1978-11-01), Diens
patent: 4130506 (1978-12-01), Collier

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