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Device and method for preparing 2,3,3,3-tetrafluoropropylene

A technology for tetrafluoropropene and tetrachloropropene, which is applied in the field of devices for preparing 2,3,3,3-tetrafluoropropene, can solve the problems of saponification reaction with three wastes, corrosion of the reactor, low yield, etc., and can reduce equipment The effect of investment and energy consumption, simplified process flow and simple reaction process

Pending Publication Date: 2018-02-02
SHANDONG HUAAN NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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 will bulge. It is difficult to choose equipment, and the third step of saponification reaction has many wastes and low yield.
In summary, there are many reaction steps for the preparation of 2,3,3,3-tetrafluoropropene in the prior art, the separation equipment is complicated, the catalyst life is short, and the internal corrosion of the reactor is serious. , a device and method for preparing 2,3,3,3-tetrafluoropropene with optimized reaction process

Method used

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  • Device and method for preparing 2,3,3,3-tetrafluoropropylene

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Effect test

Embodiment 2

[0041] The difference between this embodiment and embodiment 1 is: first 100ml Al 2 o 3 / Cr catalyst (the loading of Cr is 6wt%) is packed into the lower section of the second reactor, and 100ml Al 2 o 3 / T1 catalyzer (the loading capacity of T1 is 8wt%) loads the upper section of the second reactor; Then 200ml chromium-magnesium-iron catalyst (by mass percentage, catalyst is made up of: chromium oxide 70%, magnesia 10%, oxidized Iron 20%) is charged in the first reactor.

[0042] Then raise the temperature of the first reactor to 300°C, pass HF and nitrogen to activate, HF flow rate: 100g / h, nitrogen flow rate: 2L / min, activation time is 48 hours; the second reactor is heated to 380°C, pass through HF and nitrogen are activated, HF flow rate: 100g / h, nitrogen flow rate: 3L / min, activation time is 40 hours, and the catalyst activation of the two reactors is completed. When the temperature of the first reactor and the second reactor is raised, the temperature rise rate is 2...

Embodiment 3

[0049] The difference between this embodiment and embodiment 1 is: first 100ml Al 2 o 3 / Cr catalyst (the loading of Cr is 3wt%) is packed into the lower section of the second reactor, and 100ml Al 2 o 3 / T1 catalyzer (the loading capacity of T1 is 5wt%) loads the upper part of the second reactor; Then 200ml chromium-magnesium-iron catalyst (by mass percentage, catalyst is made up of: chromium oxide 70%, magnesium oxide 10%, oxidized Iron 20%) is charged in the second reactor.

[0050] Then raise the temperature of the first reactor to 300°C, pass HF and nitrogen to activate, HF flow rate: 100g / h, nitrogen flow rate: 2L / min, activation time is 48 hours; the second reactor is heated to 380°C, pass through HF and nitrogen are activated, HF flow rate: 100g / h, nitrogen flow rate: 3L / min, activation time is 40 hours, and the catalyst activation of the two reactors is completed. When the temperature of the first reactor and the second reactor is raised, the temperature rise rate...

Embodiment 4

[0056] The difference between this embodiment and embodiment 1 is: first 100ml Al 2 o 3 / Cr catalyst (the loading of Cr is 6wt%) is packed into the lower section of the second reactor, and 100ml Al 2 o 3 / TI catalyst (the loading capacity of TI is 8wt%) is packed into the upper section of the second reactor; Then 200ml of chromium-magnesium-iron catalyst (by mass percentage, the catalyst is composed of: chromium oxide 70%, magnesium oxide 10%, oxide Iron 20%) is charged in the first reactor.

[0057] Then raise the temperature of the first reactor to 300°C, pass HF and nitrogen to activate, HF flow rate: 100g / h, nitrogen flow rate: 2L / min, activation time is 48 hours; the second reactor is heated to 380°C, pass through HF and nitrogen are activated, HF flow rate: 100g / h, nitrogen flow rate: 3L / min, activation time is 40 hours, and the catalyst activation of the two reactors is completed. When the temperature of the first reactor and the second reactor is raised, the temper...

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Abstract

The invention relates to a device and method for preparing 2,3,3,3-tetrafluoropropylene. The device for preparing the 2,3,3,3-tetrafluoropropylene comprises a first reactor, a first rectifying tower group, a second reactor, a second rectifying tower group, a crude product pot and a third rectifying tower group which are successively installed forward and backward. According to the device and method for preparing the 2,3,3,3-tetrafluoropropylene, two types of different catalysts are loaded in the second reactor, and two reactions are performed simultaneously, so the technological process is simplified; the reactions are a gas-phase reaction, so the problems that the age of a liquid phase reaction catalyst is short and the corrosion of the reactor is serious are effectively solved; and the reaction process is simple, so the equipment investment and the energy consumption are reduced.

Description

technical field [0001] The invention relates to a device and method for preparing 2,3,3,3-tetrafluoropropene. Background technique [0002] At present, there are three main methods for the preparation of 2,3,3,3-tetrafluoropropene: 3,3,3-trifluoropropene method, hexafluoropropene method and 1,1,2,3-tetrachloropropene (TCP) Law. Among them, the 3,3,3-trifluoropropene method has a long operation route, produces more three wastes, and the product cost is high; the 1,1,2,3-tetrachloropropene method has fewer reaction steps and high raw material utilization; the hexafluoropropylene method The preparation route is long and the overall yield is not high; while other preparation processes are all derived from the intermediate raw materials of these three routes. [0003] For example, the Chinese patent with publication number CN101597209A provides an integrated method for preparing 2,3,3,3-tetrafluoropropene, the method comprising: combining 1,1,2,3-tetrafluoropropene and the firs...

Claims

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Application Information

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IPC IPC(8): C07C17/20C07C17/383C07C21/18
CPCC07C17/20C07C17/383C07C21/18
Inventor 明文勇段琦王通王瑞英田勇李明
Owner SHANDONG HUAAN NEW MATERIAL
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