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Method for preparing monofluo-rodicloroethane

A technology of monofluorodichloroethane and monofluorochloroethane, which is applied in the field of preparation of monofluorodichloroethane, can solve the problems of high process energy consumption and high raw material cost, and achieve low process consumption and reduced raw material cost , the effect of high product purity

Active Publication Date: 2008-08-27
CHANGSHU 3F FLUOROCHEM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The shortcoming of these literature process routes is that the raw material of monofluorodichloroethane (HCFC141b) is mainly vinylidene chloride or 1,1,1-trichloroethane, and its raw material cost is on the high side, and the energy consumption of the whole process is on the high side

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] exist The stainless steel tubular reactor is filled with a mixture of 4 kg of activated carbon, platinum chloride and palladium chloride, which contains 100 grams of palladium chloride and 50 grams of platinum chloride. Warm up to 400°C with N 2 The catalyst was activated for 10 hours and then cooled to 100°C. After acetylene and hydrogen fluoride are mixed, drop into tubular reactor, the feeding rate of acetylene is 3900 grams / hour, and the feeding rate of hydrogen fluoride is 2000 grams / hour. The product of acetylene and hydrogen fluoride in the tubular reactor is directly washed with water and alkali, and then directly compressed and rectified to obtain vinyl fluoride with a purity of 99%. The receiving capacity of vinyl fluoride per hour is 4305 grams, and the yield of vinyl fluoride is 93.58%.

[0029] exist The stainless steel tubular reactor is filled with a mixture of 4kg of activated carbon, platinum chloride and palladium chloride, which contains 100 gra...

Embodiment 2

[0032] exist The stainless steel tubular reactor is filled with a mixture of 4kg of activated carbon, platinum chloride and palladium chloride, which contains 100 grams of platinum chloride and 50 grams of palladium chloride. Warm up to 400°C with N 2 The catalyst was activated for 10 hours and then cooled to 150°C. After acetylene and hydrogen fluoride are mixed, drop into tubular reactor, the feeding rate of acetylene is 3900 grams / hour, and the feeding rate of hydrogen fluoride is 2000 grams / hour. The product of acetylene and hydrogen fluoride in the tubular reactor is directly washed with water and alkali, and then directly compressed and rectified to obtain vinyl fluoride with a purity of 99%. The receiving capacity of vinyl fluoride per hour is 4217 grams, and the yield of vinyl fluoride is 91.67%.

[0033] exist The stainless steel tubular reactor is filled with a mixture of 4kg of activated carbon, platinum chloride and palladium chloride, which contains 100 gram...

Embodiment 3

[0036] exist The stainless steel tubular reactor is filled with a mixture of 4 kg of activated carbon, platinum chloride and palladium chloride, which contains 100 grams of palladium chloride and 50 grams of platinum chloride. Warm up to 400°C with N 2 The catalyst was activated for 10 hours and then cooled to 170°C. After acetylene and hydrogen chloride are mixed, drop into tubular reactor, the feeding rate of acetylene is 3900 grams / hour, and the feeding rate of hydrogen chloride is 3650 grams / hour. The product of acetylene and hydrogen chloride in the tubular reactor is directly washed with water and alkali, and then directly compressed and rectified to obtain vinyl chloride with a purity of 99.3%. The receiving amount of vinyl chloride per hour is 5602 grams, and the yield of vinyl chloride is 89.63%.

[0037] exist The stainless steel tubular reactor is filled with a mixture of 4kg of activated carbon, platinum chloride and palladium chloride, which contains 100 gra...

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Abstract

The invention discloses a preparation method of monofluo-rodicloroethane, which comprises 1, processing addition reaction on acetylene and hydrogen chloride or hydrogen fluoride at the mol ratio of 1.5-2.5:1, in the presence of catalyst, to prepare vinyl chloride or fluoride, 2, processing addition reaction on the vinyl chloride or fluoride at the mol ratio of 1:3-5 or on the fluoride or vinyl chloride at the mol ratio of 1:3-5, in the presence of catalyst to prepare monofluo-chloroethane, 3, reacting the monofluo-chloroethane and chlorine at the mol ratio of 4-6:1, in the catalysis of catalyst or ultraviolet light to generate monofluo-rodicloroethane. The invention can avoid using vinylidene chloride and 1, 1, 1-methyl chloroform as basic materials, thereby reducing material cost of the whole process and improving the purity of monofluo-rodicloroethane (HCFC 141b).

Description

technical field [0001] The invention relates to a preparation method of a compound, in particular to a preparation method of fluorodichloroethane (HCFC141b). Background technique [0002] Fluorodichloroethane (HCFC141b) is a fluorine compound widely used in the field of foaming, and it is the main substitute to completely replace monofluorotrichloromethane (CFC11). At present, the domestic annual output is about 100,000 tons, and the main production route uses vinylidene chloride or 1,1,1-trichloroethane as the main raw material. Due to the constant price of vinylidene chloride and 1,1,1-trichloroethane Maintained at a relatively high level, resulting in high manufacturing costs of 1-fluorodichloroethane, and there must be trace amounts of vinylidene chloride in the process of producing 1-fluorodichloroethane with vinylidene chloride as raw material, which seriously affects the production of 1-fluorodichloroethane. The quality of ethane, so the process must add a cumbersome...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C19/12C07C17/10C07C17/08
Inventor 司林旭张平忠徐建林
Owner CHANGSHU 3F FLUOROCHEM IND CO LTD
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