Process for the production of high-purity tetrachloro...

Details Process for the production of high-purity tetrachloro... Process for the production of high-purity tetrachloro...

C - Chemistry, Metallurgy

07

C

260/396

C07C 46/06 (2006.01) C07C 37/62 (2006.01) C07C 46/00 (2006.01) C07C 50/24 (2006.01)

Patent

CA 1313878

Abstract of the disclosure HOE 87/F 066J A process for the production of high-purity tetrachloro- 1,4-benzoquinone by the action of chlorine and hydro- chloric acid on hydroquinone which comprising causing 1.9 to 2.1 times the molar quantity of gaseous chlorine to act at temperatures from 5 to 15°C on 1 mol of hydroquinone in 6 to 7 times the molar quantity of 30 to 37 % hydro- chloric acid, then diluting the resulting suspension, essentially containing 2,5-dichlorohydroquinone, with 2 to 3 parts of water, relative to hydroquinone employed, and initially warming to a temperature from 20 to 30°C, subsequently introducing 1.9 to 2.1 times the molar quantity of chlorine gas in an air atmosphere while raising the temperature to 90-100°C with simultaneous dilution with 3.5 to 4.5 parts of water, relative to hydroquinone employed, and finally introducing 1 to 2 times the molar quantity of gaseous chlorine, relative to hydroquinone employed, at temperatures from 100 to 115°C

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