Tosoh Corporation

Koji Kunimoto

Hisao Eguchi

Masashige Kubo

Hanzo Tamabayashi

Masakatsu Sato

Sadami Shimizu

Noritaka Nagasaki

A process for producing tetrabromobisphenol A of high quality, which comprises brominating bisphenol A with bromine, wherein a solvent mixture comprising a hydrohalogenic acid and an alcohol, is used as the solvent for reaction. Also disclosed is a process for producing tetrabromobisphenol A of high quality, which comprises brominating bisphenol A with bromine in an alcohol, wherein the reaction temperature is set at a level of from -10.degree. to +20.degree. C., and water is added in an aging step.

Process for producing tetrabromobisphenol A

A process for producing tetrabromobisphenol A, which comprises brominating bisphenol A in methanol, wherein the substrate concentration of bisphenol A to methanol is at most 20 wt/vol %.

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Tokuyama, Japan

Koji Kunimoto