Inks and UV-opaque protectorants comprising basic sodium and/or

Details Inks and UV-opaque protectorants comprising basic sodium and/or Inks and UV-opaque protectorants comprising basic sodium and/or

1997-07-14

1999-02-16

Straub, Gary P.

Compositions: coating or plastic

Coating or plastic compositions

Marking

23302R, 23305A, 106316, 423556, C01F 774, C09D 1100

Patent

active

058715711

ABSTRACT:
A process for making ink which begins with 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 sulfates that are introduced to a surface-cooled crystallizer that drops the Al.sub.2 (SO.sub.4).sub.3 +18H.sub.2 O which is removed from the leach liquor. The leach liquor is then supplied with a mixture which includes K.sub.2 SO.sub.4 into a simple crystallization and evaporation unit 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 sodium/potassium aluminum sulfate and excess sodium sulfate or sodium/potassium. The excess sodium sulfate or sodium/potassium sulfate is returned to the simple crystallization and evaporation unit. The basic potassium aluminum sulfate (BKAS) and/or basic sodium aluminum sulfate (BNaAS) Na.sub.2 SO.sub.4, 3Al.sub.2 O.sub.3, 4SO.sub.3, 9H.sub.2 O is used as a filler in the making of ink.

REFERENCES:
patent: 82747 (1868-10-01), Pemberton
patent: 3193345 (1965-07-01), Marsh
patent: 4563342 (1986-01-01), Gunnarsson et al.
patent: 5783163 (1998-07-01), Rendall et al.

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