Preparation of ultra-pure silver nitrate

Details Preparation of ultra-pure silver nitrate Preparation of ultra-pure silver nitrate

1986-03-17

1991-03-19

Langel, Wayne A.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group ib metal

423395, C01B 2148

Patent

active

050009281

ABSTRACT:
Ultra-pure silver nitrate is prepared from crude silver by a process comprising the steps of dissolving the crude silver in nitric acid to form a crude silver nitrate solution; adding an alkaline agent, such as sodium hydroxide, to the crude silver nitrate solution to precipitate metallic contaminants and form a partially purified silver nitrate solution; adding a selective reducing agent, such as sodium formate, to the partially purified silver nitrate solution, to reduce silver nitrate to metallic silver and thereby precipitate silver powder while leaving metallic contaminants in solution; dissolving the silver powder in nitric acid to form a highly purified silver nitrate solution; and crystallizing ultra-pure silver nitrate from the highly purified silver nitrate solution.

REFERENCES:
patent: 2493396 (1950-01-01), Farber et al.
patent: 2543792 (1951-03-01), Marasco et al.
patent: 2581518 (1952-01-01), Critchley
patent: 2614029 (1952-10-01), Moede et al.
patent: 2752237 (1956-06-01), Short
patent: 2940828 (1960-06-01), Moede
patent: 3141731 (1964-07-01), Dietz
patent: 3222128 (1965-12-01), Sooryn
patent: 3390981 (1968-07-01), Hoffman
patent: 3554883 (1971-01-01), Green
patent: 3800030 (1974-03-01), Long et al.
patent: 4136157 (1979-01-01), Asai et al.
patent: 4186244 (1980-01-01), Deffeyes et al.

Affiliated with

Also associated with

Rating

Preparation of ultra-pure silver nitrate does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Preparation of ultra-pure silver nitrate, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Preparation of ultra-pure silver nitrate will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2008837