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A kind of trapping device and process for the production of o-chlorobenzonitrile

A technology of o-chlorobenzonitrile and process, which is applied in the field of trapping devices for the production of o-chlorobenzonitrile, can solve problems such as harsh working environment, continuous discharge, and high labor intensity of workers, and achieves improved site environment, automatic continuous The effect of discharging materials and reducing labor intensity of workers

Active Publication Date: 2021-02-09
SHANGHAI XIAOMING DETECTION TECH SERVICE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the domestic production of aromatics with nitrile groups and halogenated aromatics by the ammonia oxidation method is mainly thin-walled capture. This capture method is labor-intensive for workers, and the working environment on site is harsh. Continuous discharge of products cannot be achieved. Large amount of wastewater treatment

Method used

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  • A kind of trapping device and process for the production of o-chlorobenzonitrile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Such as figure 1 As shown, the trapping device used for the production of o-chlorobenzonitrile includes a multi-stage trap melter, including four stages in this embodiment: a primary trap melter 1a, a secondary trap melter 1b, and a third stage Capture melter 1c, four-stage capture melter 1d, middle tank 2, liquid separator 3, water phase receiving tank 4, floc receiving tank 5, organic phase receiving tank 6; all levels of capture melters are connected in series , and the trapping melters at all levels are connected to the middle tank 2, the middle tank 2 is connected to the liquid separator 3 through the pump, and the liquid separator 3 is respectively connected to the parallel water phase receiving tank 4, the floc receiving tank 5 and the organic phase receiving tank 6. The outlet of the last-stage trapping melter is connected to a tail gas incineration device.

[0029] The trapping melters at all levels are equipped with jackets and coils. The inner walls and coi...

Embodiment 2

[0033] The capture process for the production of o-chlorobenzonitrile, the reaction mixed gas at the outlet of the 230°C oil cooler passes through the first, second, third and fourth capture melters in sequence, and the inner wall and disc of the capture melter at each level Tube material is stainless steel. At this time, the jackets and coils of the four trapping melters were fed with low-temperature water at a temperature of 15° C., and gaseous o-chlorobenzonitrile was precipitated on the inner wall and coil surface of the four trapping melters and became solid. The temperature of the tail gas at the outlet of the fourth-stage capture melter is controlled at 40°C, and the tail gas enters the tail gas incinerator for treatment. After the capture process is completed, hot water with a temperature of 50°C is passed through the jackets and coils of the four capture melters for 0.5 hours, and the solid o-chlorobenzonitrile is heated and melted into a liquid state and then enters ...

Embodiment 3

[0036]The capture process for the production of o-chlorobenzonitrile, the reaction mixed gas at the outlet of the 230°C oil cooler passes through the first, second, third and fourth capture melters in sequence, and the inner wall and disc of the capture melter at each level Tube material is stainless steel. At this time, the temperature in the jackets and coils of the four trapping melters is -5°C chilled water, and gaseous o-chlorobenzonitrile is precipitated on the inner wall and coil surface of the four trapping melters and becomes solid. The temperature of the tail gas at the outlet of the fourth-stage capture melter is controlled at 10°C, and the tail gas enters the tail gas incinerator for treatment. After the capture process is completed, the jackets and coils of the four capture melters pass hot water at a temperature of 50°C for 0.5 hours. The solid o-chlorobenzonitrile is heated and melted into a liquid state and then enters the middle tank. The mixture of the aqueo...

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Abstract

The invention relates to a trapping device and process for the production of o-chlorobenzonitrile, comprising a multi-stage trapping melter, an intermediate tank (2), a liquid separator (3), an aqueous phase receiving tank (4), a flocculation solids receiving tank (5), organic phase receiving tank (6); the trapping melters at all levels are connected in series in sequence, and the trapping melters at all levels are connected to the middle tank (2), and the middle tank (2) is connected to the liquid separation through the pump The device (3) and the liquid separator (3) are respectively connected to the parallel water phase receiving tank (4), the floc receiving tank (5) and the organic phase receiving tank (6). Compared with the prior art, the invention improves the collection rate, realizes continuous discharge, reduces the labor intensity of workers, improves the working environment on site, and reduces the amount of waste water produced.

Description

technical field [0001] The invention relates to the field of pesticide production, in particular to a trapping device and process for the production of o-chlorobenzonitrile. Background technique [0002] O-chlorobenzonitrile (OCBN) is an important organic raw material for organic synthesis, mainly used in the synthesis of dye intermediate 2-cyano-4-nitroaniline, in the pharmaceutical industry for the synthesis of new antimalarial drug nitroquine, and in the synthesis of fungicide fluoroquine Azole intermediates and pesticide intermediates. 2-cyano-4-methylbiphenyl can also be synthesized for the preparation of antihypertensive APIs. [0003] The main methods of synthesizing o-chlorobenzonitrile are as follows: [0004] (1) by o-chlorobenzaldehyde as raw material, dimethylacetamide is synthesized as catalyst; [0005] (2) Synthesized by ammoxidation of o-chlorotoluene; [0006] (3) synthesized by o-chlorobenzoic acid; [0007] Due to the high price of o-chlorobenzoic aci...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D7/02C07C253/34C07C255/50
CPCB01D7/02C07C253/34C07C255/50
Inventor 王海波李强田玫丽田晓宏
Owner SHANGHAI XIAOMING DETECTION TECH SERVICE CO LTD
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