Method of crystallizing aluminium sulphate solutions to form dus

Details Method of crystallizing aluminium sulphate solutions to form dus Method of crystallizing aluminium sulphate solutions to form dus

1979-03-16

1981-06-30

Bernstein, Hiram

Chemistry: physical processes

Physical processes

Crystallization

23305A, B01D 902

Patent

active

042760526

ABSTRACT:
A method of crystallizing a solution of aluminium sulphate to form crystal agglomerates having an essentially uniform grain size and being in the form of granules having a characteristic appearance and good storage properties. A solution having a temperature of 105.degree.-115.degree. C. and a concentration of 14.5-16.8% by weight of Al.sub.2 O.sub.3 is brought to crystallize onto a bed of crystalline aluminium sulphate in a drum, the length of which is considerably larger than the diameter, a temperature of 70.degree.-95.degree. C. being maintained in the bed. Part of the crystalline product discharged from the drum is ground and recycled to the drum in an amount of 40-200 percent by weight of added solution and air is passed through the drum to remove moisture evolved by the crystallization so as to form a final product with more than 75% by weight present in the crystalline state and containing 15.0-18.0% by weight of Al.sub.2 O.sub.3.

REFERENCES:
patent: 2340567 (1944-02-01), Sargent
patent: 2895813 (1959-07-01), Brooksbank et al.
patent: 3011878 (1961-12-01), Lackey et al.
patent: 3082064 (1963-03-01), Brooksbank
patent: 3141743 (1964-07-01), Marsh
patent: 3143392 (1964-08-01), Saeman
J. Am. Chem. Soc. (1954), 2057, Smith et al.

Affiliated with

Also associated with

Rating

Method of crystallizing aluminium sulphate solutions to form dus 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 crystallizing aluminium sulphate solutions to form dus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of crystallizing aluminium sulphate solutions to form dus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2434071