Co-production method of trans-1-chlorine-3,3,3-trifluoropropene and 2,3,3,3-tetrafluoropropene

A technology of trifluoropropene and tetrafluoropropene, which is applied in the field of preparation of fluorine-containing olefins and fluorine-containing chloroolefins, can solve the problems of excessive three wastes, bulging, and high synthesis cost, and achieves simple processing technology, high operating flexibility, and low loss live effect

Active Publication Date: 2018-08-10
ZIBO FEIYUAN CHEM CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The raw materials of the trifluoropropylene method are not easy to obtain, there are many wastes in the process, and there is no industrialized device at present; the hexafluoropropylene method is currently used in industrialized routes, and HFO-1234yf is synthesized in four steps, two-step hydrogenation and two-step dehydrofluorination , the synthesis cost is high; the tetrachloropropene method can synthesize HFO-1234yf in two or three steps, and the raw material of TCP is not easy to obtain, and the subsequent generation of HCl restricts the further development of production capacity
This route synthesizes 2,3,3,3-tetrafluoropropene in three steps. HCFO-1233xf is converted into HCFC-244bb in a liquid phase reactor. The catalyst is antimony halide. The reactor is lined with TFE or PFA. The disadvantages are The interior of the reactor is severely corroded and bulged, making it difficult to select equipment
The third step saponification reaction has many wastes and low yield

Method used

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  • Co-production method of trans-1-chlorine-3,3,3-trifluoropropene and 2,3,3,3-tetrafluoropropene
  • Co-production method of trans-1-chlorine-3,3,3-trifluoropropene and 2,3,3,3-tetrafluoropropene
  • Co-production method of trans-1-chlorine-3,3,3-trifluoropropene and 2,3,3,3-tetrafluoropropene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 10ml of chromium oxide + alumina, loaded with cobalt and nickel, the loading of cobalt is 2wt%, and the loading of nickel is 10wt%. The catalyst is loaded into the first reactor, and 10ml of chromium oxide is loaded with gallium, and the loading of gallium is 5wt%. Load the catalyst into the second reactor, raise the temperature to a bed temperature of 350°C, pass HF into it for activation, the flow rate of HF: 10g / h, the hot spot temperature <400°C, and fluoride for 40 hours.

[0034] The first reactor is fed with HF, 1,1,1,3,3-pentachloropropane and 1,1,1,2,3-pentachloropropane, the relevant reaction conditions and the composition of the second reactor outlet, the results are shown in the table 1.

[0035] Table 1: Example 1 reaction conditions and the composition of the second reactor outlet

[0036]

Embodiment 2

[0038] 10ml of chromium oxide + alumina, loaded with cobalt and nickel, the loading of cobalt is 5wt%, and the loading of nickel is 12wt%. The catalyst is loaded into the first reactor, and 10ml of chromium oxide is loaded with gallium, and the loading of gallium is 10wt%. Load the catalyst into the second reactor, raise the temperature to a bed temperature of 350°C, pass HF into it for activation, the flow rate of HF: 10g / h, the hot spot temperature <400°C, and fluoride for 40 hours.

[0039] The first reactor is fed with HF, 1,1,1,3,3-pentachloropropane and 1,1,1,2,3-pentachloropropane, the relevant reaction conditions and the composition of the second reactor outlet, the results are shown in the table 2.

[0040] Table 2: Embodiment 2 reaction conditions and the composition of the second reactor outlet

[0041]

Embodiment 3

[0043] 10ml of chromium oxide + alumina, loaded with cobalt and nickel, the loading of cobalt is 3wt%, and the loading of nickel is 15wt%. The catalyst is loaded into the first reactor, and 10ml of chromium oxide is loaded with gallium, and the loading of gallium is 8wt%. Load the catalyst into the second reactor, raise the temperature to a bed temperature of 350°C, pass HF into it for activation, the flow rate of HF: 10g / h, the hot spot temperature <400°C, and fluoride for 40 hours.

[0044] The first reactor is fed with HF, 1,1,1,3,3-pentachloropropane and 1,1,1,2,3-pentachloropropane, the relevant reaction conditions and the composition of the second reactor outlet, the results are shown in the table 3.

[0045] Table 3: Embodiment 3 reaction conditions and the composition of the second reactor outlet

[0046]

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Abstract

The invention discloses a co-production method of trans-1-chlorine-3,3,3-trifluoropropene and 2,3,3,3-tetrafluoropropene. The co-production method of the trans-1-chlorine-3,3,3-trifluoropropene and the 2,3,3,3-tetrafluoropropene comprises the following steps: mixing 1,1,1,3,3-pentachloropropane and 1,1,1,2,3-pentachloropropane according to proportion, introducing the mixture and hydrogen fluorideinto a first reactor, performing fluorination reaction under the action of a catalyst A to obtain trans-1-chlorine-3,3,3-trifluoropropene, cis-1-chlorine-3,3,3-trifluoropropene, 2-chlorine-3,3,3-trifluoropropene, hydrogen chloride and hydrogen fluoride, not separating the products and directly entering a second reactor, performing reaction under the action of a catalyst B to obtain a mixture of trans-1-chlorine-3,3,3-trifluoropropene, 2,3,3,3-tetrafluoropropene, hydrogen chloride and hydrogen fluoride, and performing separation to obtain the products, namely trans-1-chlorine-3,3,3-trifluoropropene and 2,3,3,3-tetrafluoropropene. The co-production method adopts a cascade reaction mode, and is efficient, energy-saving and simple in process.

Description

technical field [0001] The present invention relates to a preparation method of fluorine-containing olefins and fluorine-containing chloroolefins, in particular to a co-production of trans-1-chloro-3,3,3-trifluoropropene and 2,3,3,3-tetrafluoropropene method. Background technique [0002] 1-Chloro-3,3,3-trifluoropropene (HFO-1233zd), is the best alternative blowing agent for CFC, HCFC, HFC and other non-fluorocarbon blowing agents, with an ODP value of about zero and a GWP value of < 5. There are two types: trans (E type) and cis (Z type). The trans type has a boiling point of 19°C and the cis type has a boiling point of 38°C. The atmospheric life is 26 days. E type is the first choice for a new generation of environmentally friendly blowing agent, suitable for Foaming of polyurethane heat insulation materials in household appliances, building insulation and other fields. Compared with HFC-245fa and cyclopentane blowing agent system, it has more excellent thermal conduc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C17/358C07C17/00C07C17/38C07C17/383C07C21/18
CPCC07B2200/09C07C17/00C07C17/358C07C17/38C07C17/383C07C21/18
Inventor 程昊肖玉岭夏凯
Owner ZIBO FEIYUAN CHEM CO LTD
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