METHOD OF PRODUCING DIFLUOROACETIC ACID AND SALTS THEREOF Russian patent published in 2012 - IPC C07C51/04 C07C51/58 C07C53/18 C07C53/48

Abstract RU 2467997 C2

FIELD: chemistry.

SUBSTANCE: object of the present invention is a method of producing difluoroacetic acid and salts thereof. The invention also relates to obtaining an acyl fluoride of difluoroacetic acid which is used as an intermediate product in production of difluoroacetic acid and salt thereof.

EFFECT: method of producing difluoroacetic acid according to the invention is characterised by that it includes a step of preparing an acyl fluoride of difluoroacetic acid by reacting an acyl chloride of dichloroacetic acid with hydrofluoric acid in a gaseous phase and in the presence of a chromium-based catalyst, followed by a step of hydrolysing the obtained acyl fluoride of difluoroacetic acid.

18 cl, 9 ex

Similar patents RU2467997C2

Title	Year	Author	Number
METHOD OF PREPARING ACID FLUORIDES FROM ACID CHLORIDES	1999	Braun Maks Riland Mattias Janssens Fransine Ajkhkhol'Ts Kerstin Pal'Skherm Shtefan	RU2230731C2
CATALYTIC GAS-PHASE FLUORINATION	2015	Pigamo Ann Vendlinzhe Loran Duse Nikolya	RU2654694C2
CATALYTIC GAS-PHASE FLUORINATION	2011	Pigamo Ann Vendlinzhe Loran Duse Nikolja	RU2571415C2
METHOD OF PRODUCING ACID FLUORIDE OF SULFONIC ACIDS	2001	Varfolomeev L.I. Grodetskij S.A. Dudkin V.V. Kal'K V.R. Kat'Janova V.R. Kozlov N.A. Kurakov V.A. Matveev A.A. Kaurova G.I. Moldavskij D.D. Matalin V.A. Timofeev S.N. Fedorova T.E. Shkul'Tetskaja L.V. Furin G.G. Ki Van Chi	RU2183621C1
CATALYST, PREPARATION METHOD THEREOF AND METHOD OF FLUORINATING HALOGENATED HYDROCARBONS	2009	Simonova Ljudmila Grigor'Evna Reshetnikov Sergej Ivanovich Zirka Aleksandr Anatol'Evich Glazyrin Aleksej Vladimirovich Kharina Irina Valer'Evna Isupova Ljubov' Aleksandrovna Bulgakova Junija Olegovna Krugljakov Vasilij Jur'Evich Parmon Valentin Nikolaevich Trukshin Igor' Georgievich Kozlova Ol'Ga Viktorovna	RU2402378C1
METHOD OF ACTIVATING CATALYST FOR PRODUCING FLUORINE-CONTAINING HYDROCARBONS	2015	Simonova Lyudmila Grigorevna Zirka Aleksandr Anatolevich Reshetnikov Sergej Ivanovich Isupova Lyubov Aleksandrovna	RU2594485C1
METHOD OF PRODUCING 2,3,3,3-TETRAFLUOROPROPENE BY GAS-PHASE FLUORINATION OF PENTACHLOROPROPANE	2011	Der-Ber Dominik Pigamo Ann Duse Nikolja Vendlinzhe Loran	RU2548902C2
METHOD OF GAS SEPARATION	2005	Ol'Shimke Jens Braukmjuller Zaskia Brash Karsten	RU2396205C2
CATALYTIC GAS-PHASE FLUORINATION	2011	Pigamo Ann Duse Nikolja Vendlinzhe Loran	RU2541541C1
METHOD OF PRODUCING 2-CHLORO-3,3,3-TRIFLUOROPROPENE RESULTING FROM GAS PHASE PENTACHLOROPROPANE FLUORINATION	2010	Bonne Filipp Pigamo Ann Vendlinzhe Loran Duse Nikolja	RU2545096C2

RU 2 467 997 C2

Authors

Metts Fransua

Sehn-Zhal'M Loran

Dates

2012-11-27—Published

2009-03-09—Filed