Method of manufacturing aluminum fluoride anhydride

Details Method of manufacturing aluminum fluoride anhydride Method of manufacturing aluminum fluoride anhydride

1997-01-29

1998-01-13

Nguyen, Ngoc-Yen

Chemistry: physical processes

Physical processes

Crystallization

23305A, 423489, C01B 908

Patent

active

057074062

ABSTRACT:
A method of manufacturing aluminum fluoride anhydride by means of a wet method. This method is featured in that a seed crystal of AlF.sub.3.3H.sub.2 O containing not more than 5% of fine particle 40 .mu.m or less in diameter is added into the super-saturated solution of aluminum fluoride in such a ratio that the total surface area of the seed crystal is in the range of 40-100 m.sup.2 per 1 kg of AlF.sub.3.3H.sub.2 O to be precipitated until an initial concentration of the super-saturated solution is reduced to 1.6%. The initial concentration of the super-saturated solution is adjusted to 8 to 15%. Resultant slurry is heated under agitation, thereby precipitating in batch-wise large AlF.sub.3.3H.sub.2 O particles which are then separated, dried and dehydrated.

REFERENCES:
patent: 1797994 (1931-03-01), Morrow
patent: 2801907 (1957-08-01), Scott
patent: 3057681 (1962-10-01), Gernes
2nd International Congress on Phosphorous Compounds Proceeding, Apr. 21-25, 1980, Boston, USA pp. 799-808, J. Y. Morlock et al.
Perry, "Chemical Engineers' Handbook", Third edition, 1950, pp. 1050-1061.
Derwent abstract for: DD 248,349 (Aug. 1987).
Derwent abstract for: DD 275,855 (Feb. 1990).
Derwent abstract for: JP 5-229,817 (Sep. 1993).
Derwent abstract for: DD 88,080 (Feb. 1974).

Affiliated with

Also associated with

Rating

Method of manufacturing aluminum fluoride anhydride does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of manufacturing aluminum fluoride anhydride, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of manufacturing aluminum fluoride anhydride will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-322648