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Compositions and methods for an integrated 2,3,3,3-tetrafluoropropene manufacturing process

A technology of tetrafluoropropene and composition, which is applied in the field of compositions for synthesizing hydrofluoroolefins, and can solve problems such as reduced selectivity

Pending Publication Date: 2021-02-19
THE CHEMOURS CO FC LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reaction suffers from yield losses due to the decomposition of 1,3,3,3-tetrachloropropane at temperatures (°C) at or above its boiling point, and due to the need for an oxygen co-feed to prolong catalyst life decrease in selectivity

Method used

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  • Compositions and methods for an integrated 2,3,3,3-tetrafluoropropene manufacturing process
  • Compositions and methods for an integrated 2,3,3,3-tetrafluoropropene manufacturing process
  • Compositions and methods for an integrated 2,3,3,3-tetrafluoropropene manufacturing process

Examples

Experimental program
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Effect test

Embodiment 1

[0089] To a Hastelloy tube (12" by 1 / 2") was added 6cc of 10% Cr / AC catalyst (12 mesh-20 mesh). With 30 standard cubic centimeters per minute (sccm) of nitrogen (N 2 ) purged the catalyst bed and set the temperature to 150°C for 2 hours and 250°C for 2 hours. Lower the temperature to 200°C and the N 2 The flow was changed to 60 seem and anhydrous HF stream was fed at 20 seem for 1 hour. The temperatures were then set at 250°C and 300°C for 1 hour each. At 300°C, the N 2 The flow and HF flow were changed to 20 seem and 30 seem, respectively, for one hour. The HF flow was then changed to 48 seem and the temperature was changed to 325°C for 2 hours. stop after N 2 flow and the HF flow was maintained at 48 seem for 1 hour to complete catalyst activation.

Embodiment 2

[0091] Conversion of 1,1,3-trichloro-1-propene (1240za) to 3,3,3-trifluoro-1-propene (1243zf).

[0092] 1240za was fed at about 0.2 cc / hr using a syringe pump and HF was fed at about 12.5 seem using a mass flow controller. Before entering the reactor, the organic and HF streams were mixed in a gasifier heated at 150°C. The reaction was carried out at 300°C and atmospheric pressure. Sample analysis was performed by injecting the product stream directly onto an Agilent 7890A GC equipped with a 5975C MS. The gas chromatography column used to analyze the product stream was derived from 20 meters x 1 / 8" column.

Embodiment 3

[0094] Conversion of 1,1,1,3-tetrachloropropane (250fb) to 3,3,3-trifluoro-1-propene (1243zf) (comparative)

[0095] 250fb was fed at about 0.2 cc / hr using a syringe pump and HF was fed at about 12.5 seem using a mass flow controller. Before entering the reactor, the organic and HF streams were mixed in a gasifier heated at 150°C. The reaction was carried out at 300°C and atmospheric pressure. Sample analysis was performed by injecting the product stream directly onto an Agilent 7890A GC equipped with a 5975C MS. The gas chromatography column used to analyze the product stream was derived from 20 meters x 1 / 8" column.

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PUM

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Abstract

A method of synthesizing 3,3,3-trifluoropropene including contacting 1,3,3,3-tetrachloropropane, in the vapor phase, at a temperature sufficient to effect dehydrochlorination to form 1,1,3-trichloro-1-propene. The 1,1,3-trichloro-1-propene is isolated and subsequently contacted, in the vapor phase, with hydrogen fluoride in the presence of a fluorination catalyst at a temperature sufficient to effect formation of 3,3,3-trifluoropropene.

Description

[0001] This application claims the benefit of US Application No. 62 / 695233, filed July 9, 2018. The disclosure of 62 / 695233 is incorporated herein by reference. technical field [0002] The present invention relates to compositions and methods for synthesizing hydrofluoroolefins (HFOs). More specifically, the present invention relates to the synthesis of 3,3,3-trifluoropropene (TFP or 1243zf) via 1,1,3-trichloro-1-propene (1240za) intermediate and the synthesis of 2,3,3,3 - The method of tetrafluoropropene (1234yf). Background technique [0003] Hydrofluorocarbons (HFCs), such as hydrofluoroolefins, have been disclosed as effective refrigerants, fire extinguishing agents, heat transfer media, propellants, foaming agents, blowing agents, gaseous dielectrics , sterilant carrier, polymerization medium, particle removal fluid, carrier fluid, polishing abrasive, displacement desiccant, and power cycle working fluid. HFOs have replaced chlorofluorocarbons and hydrochlorofluoroc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C17/20C07C21/18
CPCC07C17/206C07C21/18B01J23/26B01J37/26C07C17/04C07C17/23
Inventor A·杰克逊
Owner THE CHEMOURS CO FC LLC
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