Unlock instant, AI-driven research and patent intelligence for your innovation.
Preparation method of 1,2,3,3,3-pentafluoropropylene
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 pentafluoropropylene and hexafluoropropylene, applied in the field of dehydrofluorination to obtain 1, which can solve the problems of difficult acquisition of CFC-1213xa and low single-pass total yield
Active Publication Date: 2012-10-10
XIAN MODERN CHEM RES INST
View PDF5 Cites 1 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
But this synthesis method exists the problem that raw material CFC-1213xa is not easy to obtain, and the total yield of one pass is low
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
[0037] 50 ml of a commercially available 2% Pd / C catalyst was added to a carbon steel pipe with an inner diameter of 38 mm. The temperature of the first reactor is 50°C, and H 2 and HFP, control H 2 The molar ratio to HFP is 2, and the space velocity of HFP is 360h -1 , reaction pressure 0.1MPa, after reacting for 20h, use gas chromatography to analyze the composition of organic matter in the reaction product, the results are shown in Table 1.
Embodiment 2
[0039] Add 50 ml of a commercially available 5% Pd / C catalyst into a glass tube with an inner diameter of 38 mm. The first reactor was placed in an ice bath at 0°C, and H 2 and HFP, control H 2 The molar ratio to HFP is 2, and the space velocity of HFP is 480h -1 , reaction pressure 0.1MPa, after reacting for 20h, use gas chromatography to analyze the composition of organic matter in the reaction product, the results are shown in Table 1.
Embodiment 3
[0041] The operation was basically the same as in Example 1, except that the reaction temperature was 100°C. The 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 discloses a preparation method of Z-1,2,3,3,3-pentafluoropropylene (Z-HFO-1225ye), which comprises the following steps: a. adding hydrogen and hexafluoropropylene into a first reactor and reacting under the existence of a hydrogenation catalyst; b. leading a product prepared in the step a to flow into a first distillation tower for separation and returning a tower component to the first reactor; c. adding N2 and a tower reactor component 1,1,2,3,3-hexafluoropropane (HFC-263ea) prepared in the step b into a second reactor and reacting the 1,1,2,3,3-hexafluoropropane under the existence of off hydrogen fluoride and isomerization catalysts; d. leading a product prepared in the step c to flow into a second distillation tower for separation and returning a tower component into the second reactor; e. adding a tower reactor component prepared in the step d into a third distillation tower for separation and separating the tower component with a system to obtain the target product Z-HFO-1225ye after treatment; and f. adding a tower reactor component prepared in the step e into a phase separator for phase separation, returning an organic phase with rich HFC-236es into the second reactor and separating an organic phase with rich HF from the system. The invention is mainly used for the preparation of the Z-HFO-1225ye.
Description
technical field [0001] The present invention relates to a preparation method of 1,2,3,3,3-pentafluoropropene (HFO-1225ye), in particular to a method of using hydrogen and hexafluoropropylene (HFP) as raw materials, first in the presence of a hydrogenation catalyst Hydrogenation, and then dehydrofluorination under the action of a dehydrofluorination catalyst to obtain 1,2,3,3,3-pentafluoropropene. Background technique [0002] 1,2,3,3,3-Pentafluoropropene (HFO-1225ye), with low greenhouse effect potential (GWP) and zero ozone depletion potential (ODP), is considered to be the most potential alternative to 1,1 , a third-generation ODS substitute for 1,2-tetrafluoroethane (HFC-134a), widely used as a refrigerant, blowing agent, aerosol propellant, solvent, etc. [0003] The world patent WO2007019354A discloses a method for synthesizing HFO-1225ye by dehydrofluorination. The method uses 1,1,1-trifluoro-2,3,3-trichloropropene (CFC-1213xa) as a raw material for a three-step reac...
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