PROCESS FOR PRODUCING FLUORINATED (METH)ACRYLIC ESTER
A mixture of fluoroalkyl iodides of the formula C2F5(CF2CF2)nI ( n is an integer of ≥0) wherein the sum of such fluoroalkyl iodides of n=3 and n=4 contained is ≥85 mol% is provided. This mixture is subjected to an ethylene addition step and an esterification step, and C2F5(CF2CF2)nCH=CH2 and C2F5(CF2CF2)nCH2CH2OH are removed. Thus, there can be obtained a mixture of fluorine-containing (meth)acrylic esters of the formula C2F5(CF2CF2)nCH2CH2OCOCR1=CH2 (wherein R1 represents a hydrogen atom or a methyl group, and n is an integer of ≥0) wherein the content of impurities (namely, olefins of the formula C2F5(CF2CF2)nCH=CH2 and alcohols of the formula C2F5(CF2CF2)nCH2CH2OH) is low.
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Page/Page column 9-10
(2010/11/25)
Purification of fluorinated alcohols
A process for reducing the level of perfluoroalkanoic acids, perfluoroalkanoic esters, and perfluoroalkyliodides in fluorinated alcohols comprising heating a fluorinated alcohol, or mixtures thereof, containing said acids, esters, or iodides to a temperature of at least 175° C. in the presence of water and a base additive is disclosed.
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Page/Page column 4-5
(2008/06/13)
Catalysts for the preparation of fluorinated alcohols and process for the preparation of fluorinated alcohols
The present invention provides a catalyst for preparing a fluorine-containing alcohol compound, the catalyst having at least one component selected from elements in Group 1B, Group 2B, Group 6A, Group 7A and Group 8 of the periodic table, ions of these elements, oxides containing these elements, hydroxides containing these elements and salts containing these elements, said component being supported on at least one complex oxide selected from Si—Al complex oxides, Al—P complex oxides and Si—Al—P complex oxides; and a method for preparing a fluorine-containing alcohol compound, the method comprising reacting a halogenated fluorine compound with water in the presence of the catalyst. According to the present invention, a fluorine-containing alcohol compound can be prepared at a relatively low reaction temperature and in a high yield.
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Page column 8-9
(2008/06/13)
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