Process for producing trans-1,3,3,3-tetrafluoropropene
A manufacturing method, tetrafluoropropene technology, applied in organic chemistry methods, chemical instruments and methods, hydrogen fluoride, etc., can solve the problem of low tetrafluoropropene selectivity and achieve high productivity
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[0114] The method for preparing the metal-supported catalyst includes a method of impregnating a carrier with a solution obtained by dissolving soluble compounds of one or more metals in a solvent, or dispersing and adhering to the carrier.
[0115]Examples of the solvent-soluble metal compound include nitrates, chlorides, oxides, and sulfates of the above-mentioned metals. Specifically, chromium nitrate, chromium trichloride, chromium trioxide, potassium dichromate, ferric chloride, ferric sulfate, ferric nitrate, titanium trichloride, titanium tetrachloride, manganese nitrate, manganese chloride, Manganese dioxide, nickel nitrate, nickel chloride, cobalt nitrate, cobalt chloride, copper nitrate, copper sulfate, copper chloride, silver nitrate, copper chromite, copper dichromate, silver dichromate or sodium dichromate Wait.
[0116] The above-mentioned solvent is not particularly limited as long as it is a compound that dissolves the metal compound and does not decompose due...
Embodiment
[0200] Hereinafter, although an Example demonstrates this invention in detail, this invention is not limited to these Examples. It should be noted that the composition ratio of the reaction product A and the residue B in the present embodiment is determined by directly injecting gas chromatography (hereinafter referred to as GC) and using a hydrogen flame ion detector (hereinafter referred to as FID) as a detector. To measure. The composition ratio of each component is expressed in mol % based on the area of the GC chart.
[0201] [Preparation of fluorination catalyst]
[0202] First, a fluorination catalyst used in the production reaction of trans-1,3,3,3-tetrafluoropropene was prepared according to the following procedure.
preparation example 1
[0204] Activated alumina is brought into contact with hydrogen fluoride to form alumina fluoride, and chromium is supported on the alumina fluoride to obtain a fluorination catalyst. Detailed steps are described below.
[0205] Weigh 1200g of activated alumina (manufactured by Sumitomo Chemical Industries, Ltd., trade name NKHD-24, specific surface area 340m2) with a particle diameter of 2mm to 4mm 2 / g) after washing. Next, 460 g of hydrogen fluoride was dissolved in 4140 g of water to prepare hydrofluoric acid at a concentration of 10% by mass. While stirring 10% by mass of hydrofluoric acid, the washed activated alumina was slowly added, and then left to stand for 3 hours. After the activated alumina was washed with water and filtered again, it was heated to 200° C. in an electric furnace and dried for 2 hours. 1600ml (1600cm3 ) The dried activated alumina is filled into the gas phase reaction device. While passing nitrogen gas into a gas phase reactor made of a cylindr...
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