Chemistry of inorganic compounds – Sulfur or compound thereof – Oxygen containing
Patent
1996-08-27
1998-07-21
Straub, Gary P.
Chemistry of inorganic compounds
Sulfur or compound thereof
Oxygen containing
C01F 1774
Patent
active
057831637
ABSTRACT:
A process in which a leach liquor of Al.sub.2 (SO.sub.4).sub.3 +K.sub.2 SO.sub.4 +Fe.sub.2 SO.sub.4 and other sulphates is introduced to a surface-cooled crystallizer that drops the Al.sub.2 (SO.sub.4).sub.3 +18H.sub.2 O. The leach liquor is pumped through a heat exchanger that keeps a temperature of 160.degree. F. and the surface temperature of the surface-cooled crystallizer is maintained at 60.degree. F. The temperature gradient within the leach liquor promotes crystal formation. These crystals are then supplied to mixture which includes K.sub.2 SO.sub.4 in a simple crystallization and evaporation step that uses a vacuum of twenty inches of mercury and heat to drop Al.sub.2 (SO.sub.4).sub.3 +K.sub.2 SO.sub.4 +24H.sub.2 O. A pressure of 250 PSI and a temperature of 200.degree. C. are then applied in a discrete continuous process that yield a basic sodium or potassium aluminum sulphate and excess sodium sulphate or potassium. The excess sodium sulphate or potassium sulphate is returned to the simple crystallization and evaporation step. The basic sodium aluminum sulphate comprises particles that are at least forty percent below two micron. This is then applied to a delaminator that converts eighty-five percent of the particles to under two micron. The BKAS and/or BNaAS is used as a filler in the making of paper.
REFERENCES:
patent: 1538837 (1925-05-01), Myham
patent: 1964389 (1934-06-01), Steuart
patent: 4394368 (1983-07-01), Shanks
patent: 4526763 (1985-07-01), Bartlett et al.
patent: 5167766 (1992-12-01), Honig et al.
patent: 5258168 (1993-11-01), Misra
Ullmann's Encyclopedia of Industrial Chemistry 5th Edition undated, vol. A 1 pp. 532-534.
Kashkai, Ch. M, Crystallization of Alunites Synthesis Probl. Metasomatizma 361-8,From Ref. Zh Geol. v. 1971 Abstract of 3V619.
Ahghar Massoud
Rendall John S.
Schatzel Thomas E.
Solv-Ex Corporation
Straub Gary P.
LandOfFree
Process for making basic sodium and/or potassium aluminum sulpha 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 making basic sodium and/or potassium aluminum sulpha, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for making basic sodium and/or potassium aluminum sulpha will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1644173