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A continuous production device and method for 1,1,3-trichloropropene

A technology of trichloropropene and production device, which is applied in the field of continuous production device of 1,1,3-trichloropropene, can solve the problems of reduced production efficiency, low yield, reduced reaction conversion rate, etc. The effect of improving the reaction yield and speeding up the circulation flow rate

Active Publication Date: 2021-09-17
新元化学(山东)股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method improves the selectivity of the product and reduces the amount of high-boiling point waste. However, the reaction conversion rate of this method decreases significantly with the increase of selectivity, which greatly reduces the production efficiency, which is not conducive to its industrial continuous large-scale production.
[0004] In summary, the current conventional 1,1,3-trichloropropene preparation method has a large amount of waste and waste water, low production efficiency, low yield, and the by-product HCl is not effectively recycled, making it difficult to achieve continuous large-scale industrialization. Production and other issues

Method used

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  • A continuous production device and method for 1,1,3-trichloropropene

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Effect test

Embodiment 1

[0043] A continuous production device for 1,1,3-trichloropropene, the device comprises a tetrachloropropane metering tank 1, a venturi jet mixer 2, a reaction distillation still 3, a reaction circulation pump 4, a reaction heater 5, a reaction Rectification tower 6, rectification condenser 7, 1,1,3-trichloropropene receiving tank 8, 1,1,3-trichloropropene product pump 9, hydrochloric acid tank 10, hydrochloric acid product pump 11, primary falling film Absorption tower 12, primary hydrochloric acid pump 13, secondary falling film absorption tower 14, secondary hydrochloric acid pump 15, tertiary falling film absorption tower 16, tertiary hydrochloric acid pump 17, lye metering tank 18, lye vacuum ejector 19 , lye circulating tank 20, vacuum jet pump 21, lye cooler 22;

[0044] Described venturi jet mixer 2 is arranged on the upper end of reactive distillation still 3, and venturi jet mixer 2 suction port and reactive distillation still 3 side tops are communicated by air condu...

Embodiment 2

[0050] A continuous production device for 1,1,3-trichloropropene as described in Example 1, the difference is: the 1,1,3-trichloropropene product pump 9 and the hydrochloric acid product pump 11 are both high The vacuum pump can realize the continuous extraction of 1,1,3-trichloropropene products and hydrochloric acid products. The liquid level gauges are provided in the lower liquid collecting tanks of the falling film absorption towers 12, 14 and 16.

Embodiment 3

[0052] Utilize the method for continuous production of 1,1,3-trichloropropene by the production device described in embodiment 1 or 2, comprising the steps as follows:

[0053] (1) First, the tap water is injected into the liquid collecting tanks of the falling film absorption towers 12, 14 and 16 respectively from the tap water pipeline, and the hydrochloric acid pumps 13, 15 and 17 are turned on to form a circulating absorption circuit. Add a metered 5wt% to 15wt% sodium hydroxide aqueous solution from the alkali solution measuring tank 18 to the alkali solution circulation tank 20, turn on the vacuum jet pump 21, form a circulation neutralization loop, and maintain the negative pressure operating environment of the entire system, the system vacuum The degree is -0.6~-0.95MPa. Add the metered 1,1,1,3-tetrachloropropane from the tetrachloropropane metering tank 1 to the reaction distillation still 3, start the reaction circulation pump 4 to circulate, and form a spray reactio...

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Abstract

The present invention relates to a continuous production device and method for 1,1,3-trichloropropene. The Venturi jet mixer is arranged on the upper end of the reaction rectification tank, and the suction port of the Venturi jet mixer is connected to the side top of the reaction rectification tank by The air ducts are connected to form a Venturi jet reactor. A reactive distillation tower is installed at the top of the side of the reactive distillation kettle to realize rectification while reacting. Falling film absorption tower and hydrochloric acid pump form a circulating absorption loop. The first, second and third falling film absorption towers are connected in series to ensure that HCl is fully absorbed. The lye vacuum ejector is arranged on the upper end of the lye circulation tank, constituting a Venturi jet reactor. The production method provided by the present invention is realized by the production device with the above-mentioned specific structure and connection relationship. It has the advantages of simple process, high reaction rate, high product yield, stable product quality, etc., and can realize full process control and save labor. It is suitable for 1, Continuous industrial production of 1,3‑trichloropropene products.

Description

technical field [0001] The invention relates to the technical field of chlorinated olefin production, in particular to a continuous production device and method of 1,1,3-trichloropropene. Background technique [0002] 1,1,3-Trichloropropene is an important precursor compound for the synthesis of refrigerant HFO-1234yf, and can also be used as an intermediate for pesticides and other drugs. Ozone-depleting chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs) are being phased out under the Montreal Protocol. In addition to ozone depletion issues, global warming is another important environmental issue. At present, it is widely used in automotive air conditioners, home appliances and industrial and commercial refrigeration equipment, as well as HFC-134a used in foaming, fire extinguishing, aerosol and cleaning industries. Due to its relatively high greenhouse effect (GWP=1300) and long atmospheric life Caused by global warming, it has also entered the countdown sta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D3/14B01D53/14B01J3/03B01J19/14C07C17/25C07C17/383C07C21/04
CPCB01D3/009B01D3/14B01D53/1406B01D53/1456B01J3/03B01J19/14B01J2219/00033C07C17/25C07C17/383C07C21/04
Inventor 解乐福邵军强杜辉刘晓敏周建民夏金鹏丛飞
Owner 新元化学(山东)股份有限公司
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