Crystalline form of phenyl bis (2,4,6-trimethylbenzoyl) phosphine oxide with large particle size and crystallization method for making same

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United States of America Patent

PATENT NO 11753424
APP PUB NO 20210214380A1
SERIAL NO

17144223

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Abstract

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A crystalline form of phenyl bis (2,4,6-trimethylbenzoyl) phosphine oxide, with a large particle size, which belongs to a triclinic crystal system and space group P-1. A crystallization method for making the crystalline form of phenyl bis (2,4,6-trimethylbenzoyl) phosphine oxide, comprising adding a solid of phenyl bis (2,4,6-trimethylbenzoyl) phosphine oxide to a solvent and mixing; followed by heating to 50 to 70° C. to achieve complete dissolution; cooling the solution to room temperature; and adding an anti-solvent to the resulting solution to cause precipitation of crystals. The crystals are allowed to grow at a constant temperature for 10 to 60 minutes, so as to give a slurry containing the crystals. Said slurry is subjected to filtration and then drying to obtain the crystalline form of phenyl bis (2,4,6-trimethylbenzoyl) phosphine oxide.

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Patent OwnerAddress
TIANJIN UNIVERSITY92 WEIJIN ROAD NANKAI DISTRICT TIANJIN

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bao, Ying Tianjin, CN 9 39
Chen, Mingshuo Tianjin, CN 1 0
Hou, Baohong Tianjin, CN 13 0
Xie, Chuang Tianjin, CN 8 27
Zhao, Pei Tianjin, CN 26 587
Zhou, Lina Tianjin, CN 6 1

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