ChemicalBook CAS DataBase List BENZENESULFINIC ACID

BENZENESULFINIC ACID synthesis

14synthesis methods

Product Name:BENZENESULFINIC ACID
CAS Number:618-41-7
Molecular formula:C6H6O2S
Molecular Weight:142.18

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Yield: 95%

Reaction Conditions:

with hydrogenchloride;aluminium(III) triflate;sulfur dioxide;acetic acid at 20; under 760.051 Torr; for 35 h;Pressure;Temperature;

Steps:

1 Example 1
S1: Add 39 g of benzene to 100 g of acetic acid,Stir wellThen add 5g aluminum triflate;S2: Dry hydrogen chloride gas is introduced into the solution for 10 min,Stop the access to hydrogen chloride;Under stirring,Slowly pass dry sulfur dioxide at 1 atm (gauge pressure) at 20 ° C for 35 h;S3: The reaction solution was cooled to below 10 ° C and filtered under pressure,Recover solid aluminum triflate;S4: The filtrate is distilled at 10 ° C or above to recover unreacted sulfur dioxide and hydrogen chloride,Then 0.095MPa and 60 acetic acid recovery by distillation,The remaining solid is 64.8 g of white crystalline solid benzene sulfinic acid,,The yield is 95%.

References:

Hebei University of Science and Technology;Li Junzhang CN107311896, 2017, A Location in patent:Paragraph 0030-0035; 0054-0059

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