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ChemicalBook CAS DataBase List Trichloroacetic acid
76-03-9

Trichloroacetic acid synthesis

7synthesis methods
Trichloroacetic acid is produced on an industrial scale by chlorination of acetic acid or chloroacetic acid mother-liquors at 140 - 160 °C. If necessary, calcium hypochlorite is added as a chlorination accelerator. There are conflicting views concerning adding heavy metal salts as chlorination catalysts. Examples of catalysts that have been used are iron and copper compounds, which are precipitated with sulfuric acid or phosphoric acid if decomposition of the reaction mixture occurs; 2% phosphoric acid; and catalysts and UV light. Trichloroacetic acid has also been produced without catalysts. The crude product, containing about 95% trichloroacetic acid, is best isolated by crystallizing the melt, removing the mother-liquor with most of its impurities, and increasing the purity by centrifugation or recrystallization.
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Yield:594-65-0 52% ，76-03-9 52%

Reaction Conditions:

with water at 140; for 6 h;Sealed tube;

Steps:

2.3 General Reaction Procedure

General procedure: In a typical reaction procedure 1 mmol benzonitrile and3 ml of H2O was taken in a sealed tube. About 80 mg ofcatalyst was added to this reaction mixture and stirred at140 °C on a oil bath for stipulated reaction time. Theprogress of the reaction was monitored by using thin layerchromatography. The products were identified by GC-MS(SHIMADZU-2010) analysis by separating the products ona DB-5 column.

References:

Srinivasa Rao;Srivani;Dhana Lakshmi;Lingaiah [Catalysis Letters,2016,vol. 146,# 10,p. 2025 - 2031]

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