Preparation method of 1-chloro-3,3,3-trifluoropropene
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A technology of trifluoropropene and trifluoropropane, applied in the field of preparation of 1-chloro-3,3,3-trifluoropropene, which can solve the problems of many by-products, low yield and low selectivity
Inactive Publication Date: 2014-06-18
SINOCHEM LANTIAN +1
View PDF7 Cites 3 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0008] In the above-mentioned preparation method of HCFC1233zd, there are problems of high reaction tempe
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0026] In a pressure reactor with a stirrer with a volume of 0.5L, add 1.0mol of the raw material 1,1-dichloro-3,3,3-trifluoropropane (HCFC243fa) with a mass concentration of 30% KOH solution (KOH The molar ratio with 1,1-dichloro-3,3,3-trifluoropropane is 1:1), the phase transfer catalyst tetrabutylammonium bromide is 0.01mol, and then the reactor is closed for reaction, stirring is started, The stirring speed is 200 rev / min, turn on the heating to increase the reaction temperature, the temperature is controlled at 70°C-80°C, and the reaction is carried out at constant temperature for 3.5 hours, keeping the pressure of the reaction system at 0.2MPa-0.5MPa to obtain a crude product, which is analyzed by gas chromatography. The conversion rate of HCFC243fa and the yield of HCFC1233zd are shown in Table 1 below.
Embodiment 2
[0028] The same operation as in Example 1, except that the mass concentration of KOH was changed to 40%, and the reaction results are shown in Table 1.
Embodiment 3
[0030] The same operation as in Example 1, except that the mass concentration of KOH was changed to 25%, and the reaction results are shown in Table 1.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
PUM
Login to view more
Abstract
The invention provides a preparation method of 1-chloro-3,3,3-trifluoropropene. Under an action of a catalyst, 1,1-dichloro-3,3,3-trifluoropropane is subjected to liquid-phase dehydrochlorination to generate 1-chloro-3,3,3-trifluoropropene. The catalyst comprises a main catalyst and a cocatalyst, the main catalyst is an inorganic alkali, and the cocatalyst is a phase-transfer catalyst. The preparation method provided by the invention has the advantages of high yield, easily available raw materials, mild preparation process, simple operation, and fewer by-product impurities.
Description
technical field [0001] The present invention relates to a preparation method of 1-chloro-3,3,3-trifluoropropene (HCFC1233zd), in particular to a preparation method of 1-chloro-3,3,-trifluoropropene by dehydrochlorination of chlorofluoroalkane as raw material Propylene method. Background technique [0002] Uses of 1-chloro-3,3,3-trifluoropropene (HCFC1233zd) include the preparation of 1,1,1,3,3-pentafluoropropane (HCFC245fa), production of polymers as fluorine-containing monomers, and use in organic compounds Introducing CF 3 The structural block raw material of the group. In addition, since 1-chloro-3,3,3-trifluoropropene, which is a fluorine-containing unsaturated hydrocarbon, has a double bond in the molecule, the ODP and the global warming factor (GWP) are extremely small, and it is one of the alternatives. Substances of concern. [0003] For the preparation method of 1-chloro 3,3,3-trifluoropropene in the prior art, the following reports are arranged: [0004] WO97 / ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more 
Login to view more