Process for producing antimony trioxide having a low alpha-ray s

Details Process for producing antimony trioxide having a low alpha-ray s Process for producing antimony trioxide having a low alpha-ray s

1984-05-21

1985-07-30

Doll, John

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group va metal or arsenic

423617, C01B 2900

Patent

active

045321124

ABSTRACT:
At least an equivalent amount of concentrated hydrochloric acid is added to antimony trioxide containing a substance emitting alpha rays, and they are stirred. Any undissolved residue is removed to prepare an aqueous solution of antimony chloride. Water is added to the solution, or a distillate obtained by distilling it at a temperature of at least 135.degree. C. The quantity of the water is at least 10 times by volume as much as the solution, or at least 20 times by volume as much as the distillate. The solution or distillate and the water are stirred at a temperature of at least 60.degree. C. to cause precipitation of antimony trioxide, and the precipitate is separated by filtration. The precipitate is washed with at least 10 times by weight as much warm water having a temperature of 60.degree. C., and dried. This antimony trioxide has an alpha-ray strength not exceeding 0.01 C/cm.sup.2 per hour, does not contain more than 1 ppm of any impurities such as arsenic, lead or soluble chlorine, and has a large average particle size.

REFERENCES:
patent: 3998940 (1976-12-01), Shafer
patent: 4391792 (1983-07-01), Bloise et al.
Kirk-Othmer, Encyclopedia of Chemical Technology, Third Edition, vol. 3, pp. 110, 111, John Wiley & Sons, (1978).

Affiliated with

Also associated with

Rating

Process for producing antimony trioxide having a low alpha-ray s does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for producing antimony trioxide having a low alpha-ray s, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for producing antimony trioxide having a low alpha-ray s will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2372088