General Electric Company

Sabic Innovative Plastics IP B.v.

Arun Dixit

Pradeep Jeevaji Nadkarni

Gurram Kishan

Adil Minoo Dhalla

Mahesh Malusare

Pushpa Narayanan

Jan Plen Lens

Ramanarayanan Gv

A process comprising the steps of dissolving a dihydric phenol in a solvent to form a solution A, contacting the solution A with an adsorbent material selected from the group consisting of metal oxides, modified metal oxides, activated carbons, and clays, filtering the adsorbent material to form a solution B, adding an anti-solvent to the solution B to form a solution C, and distilling the solution C, wherein the dihydric phenol is represented by Formula (I): wherein R is a hydrogen atom or an aliphatic functionality having 1 to 6 carbon atoms and n is an integer having a value of 1 to 4.

Process for the purification of dihydric phenols

Disclosed herein is a method for producing a 1-[4-(biphenyl-4-carbonyl)]phenylaminonthraquinone colorant composition where the method comprises: reacting 4-halobenzoic acid with about 1 mole to about 4 moles of a halogenating agent per mole of said 4-halobenzoic acid to form a 4-halobenzoyl halide composition; reacting in the presence of a first catalyst composition, said 4-halobenzoyl halide composition with biphenyl, in a solvent, to form a 1-[4-(biphenyl-4-carbonyl)]halobenzene composition, and reacting in the presence of a second catalyst composition and an acid scavenger, said 1-[4-(biphenyl-4-carbonyl)]phenylaminonthraquinone with a 1-aminoanthraquinone, in a reaction medium comprising a dipolar aprotic solvent, to form said 1-[4-(biphenyl-4-carbonyl)]phenylaminoanthraquinone colorant composition.

Method for preparation of an anthraquinone colorant composition

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Karnataka, India

Arun Dixit