Purification of opal and opal oleate to remove aniline

Details Purification of opal and opal oleate to remove aniline Purification of opal and opal oleate to remove aniline

1991-06-25

1992-06-30

Dixon, Jr., William R.

Compositions: coating or plastic

Materials or ingredients

Pigment, filler, or aggregate compositions, e.g., stone,...

106493, C08K 516, C04B 1600

Patent

active

051259753

ABSTRACT:
Opal and opal oleate with aniline contents of less than 500 parts per million are prepared by dissolving opal in sulfuric acid and recrystallizing. The recrystallized opal is converted to opal oleate using oleic acid. The opal oleate with low aniline content finds application in the specialty colorants field.

REFERENCES:
patent: 3671553 (1972-06-01), Papenfuss et al.
patent: 4321207 (1982-03-01), Cesark
patent: 4944806 (1990-07-01), Sharangpani et al.

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