Organic compound chlorination reaction device

Abstract

The utility model discloses an organic compound chlorination reaction device which comprises a vaporizer used for feeding of organic compounds and chlorine. The mixer is connected with the vaporizer, and the mixer is used for mixing the organic compound with the chlorine gas; the mixture of the organic compound and the chlorine gas sequentially flows through the multi-stage reactor; the cooling absorption tower is connected with the multi-stage reactor, and the cooling absorption tower is used for collecting a reaction crude product. According to the utility model, the heated chlorine and the 3-methylpyridine enter the mixer to be mixed, and when the heated chlorine is mixed with the 3-methylpyridine, the 3-methylpyridine cannot be liquefied due to over-low temperature of the chlorine, so that the problem of blockage caused by inadequate mixing of raw materials can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of pesticide synthesis, and specifically relates to an organic compound chlorination reaction device. BACKGROUND

[0002] Chlorinated pyridine, fluorinated pyridine compound is the important intermediate of various herbicides, insecticides and fungicides in agricultural production. 2-chloro-5-trichloromethyl pyridine synthesized by chlorination reaction with 3-methyl pyridine as raw material has wide application market in the intermediate of high-efficiency novel pesticide haloxyfop- r-methyl and future new chloro-containing pyridine pesticides.

[0003] In the prior art, the method for synthesizing 2-chloro-5-trichloromethyl pyridine comprises the following steps: 3-methyl pyridine is vaporized by a vaporizer and mixed with chlorine gas in a mixer, and then enters a fluidized bed reactor to perform chlorination reaction; the mixture from the fluidized bed reactor is captured by a cooling absorption tower; and 2-chloro-5-trichloromethyl pyridine is collected in the cooling absorption tower. However, the method has the problem that part of the vaporized 3-methyl pyridine is liquefied when mixed with chlorine gas in the mixer, so that the raw material cannot be fully mixed in the mixer, causing blockage and affecting the normal progress of the reaction. UTILITY MODEL CONTENT

[0004] The utility model discloses a kind of organic compound chlorination reaction devices, and the utility model provides a kind of organic compound chlorination reaction device to solve the above problems.

[0005] The utility model discloses a kind of organic compound chlorination reaction devices, and the utility model provides a kind of organic compound chlorination reaction device to solve the above problems.

[0006] An organic compound chlorination reaction device, comprising a vaporizer, the vaporizer is used for the feeding of organic compound and chlorine gas;

[0007] A mixer is connected with the vaporizer, and the mixer is used for mixing the organic compound and the chlorine gas;

[0008] A multi-stage reactor, the mixture of the organic compound and the chlorine gas flows through the multi-stage reactor in sequence;

[0009] A cooling absorption tower is connected with the multi-stage reactor, and the cooling absorption tower is used for collecting reaction crude product.

[0010] Optionally, it further includes a multi-stage tail gas spray tower, which is connected with the cooling absorption tower, and the multi-stage tail gas spray tower is used for absorbing the tail gas discharged by the cooling absorption tower.

[0011] Optionally, the multi-stage tail gas spray tower includes a first-stage tail gas spray tower, a second-stage tail gas spray tower and a third-stage tail gas spray tower connected in sequence.

[0012] Optionally, the vaporizer comprises a vaporizer one and a vaporizer two, the vaporizer one is used for vaporizing the organic compound, and the vaporizer two is used for vaporizing the chlorine.

[0013] Optionally, the multi-stage reactor comprises a first fluidized bed reactor and a second fixed bed reactor connected with the first fluidized bed reactor.

[0014] Optionally, the organic compound is 3-methylpyridine.

[0015] Optionally, the vaporizer, the mixer, the multi-stage reactor, the cooling absorption tower and the multi-stage tail gas spray tower are connected in sequence.

[0016] The beneficial effects of the utility model are as follows:

[0017] The utility model discloses a vaporizer two, and the vaporizer two is used for heating the chlorine, and the heated chlorine and 3-methylpyridine enter the mixer and mix, and the heated chlorine does not liquefy 3-methylpyridine when mixing with 3-methylpyridine, can reduce the problem of the raw material not being mixed fully and then causing the blockage.

[0018] To make the structure characteristics and the action of the utility model clearer, the utility model will be described in detail below in combination with the drawings and specific embodiments. DRAWINGS

[0019] Figure 1 It is the schematic diagram of chlorination reaction device.

[0020] Signs: 101, vaporizer one;102, vaporizer two;2, mixer;3, first fluidized bed reactor;4, second fixed bed reactor;5, cooling absorption tower;6, multi-stage tail gas spray tower. DETAILED DESCRIPTION

[0021] To make the structure characteristics and the action of the utility model clearer, the utility model will be described in detail below in combination with the drawings and specific embodiments.

[0022] As Figure 1As shown, in one embodiment, a kind of organic compound chlorination reaction device, including vaporizer, vaporizer is used for the feed of organic compound and chlorine gas, wherein organic compound is 3-methylpyridine. Optionally, vaporizer includes vaporizer one 101 and vaporizer two 102, wherein vaporizer one 101 is used for vaporizing 3-methylpyridine, and vaporizer two 102 is used for heating chlorine gas, and the heated chlorine gas is mixed with 3-methylpyridine into mixer 2, and when the heated chlorine gas is mixed with 3-methylpyridine, 3-methylpyridine will not be liquefied due to the too low temperature of chlorine gas, so that the problem of blockage caused by insufficient mixing of raw materials can be reduced.

[0023] After being mixed sufficiently, the chlorine gas and 3-methylpyridine are reacted in a multi-stage reactor. Optionally, the multi-stage reactor includes a first fluidized bed reactor 3 and a second fixed bed reactor 4 connected to the first fluidized bed reactor 3, and the mixed raw materials are first reacted in the first fluidized bed reactor 3, and the incompletely reacted raw materials are further completely chlorinated in the second fixed bed reactor 4 to obtain a mixture of 2-chloro-5-trichloromethylpyridine and chlorine gas.

[0024] The second fixed bed reactor 4 is connected to a cooling absorption tower 5, and the cooling absorption tower 5 is connected to a multi-stage tail gas spray tower 6, the product 2-chloro-5-trichloromethylpyridine is collected in the cooling absorption tower 5, and the excess chlorine gas and non-condensable gas are absorbed and treated in the multi-stage tail gas spray tower 6. The product 2-chloro-5-trichloromethylpyridine is obtained in the cooling absorption tower 5.

[0025] Optionally, the multi-stage tail gas spray tower 6 includes a first tail gas spray tower, a second tail gas spray tower and a third tail gas spray tower connected in sequence, and the excess chlorine gas and non-condensable gas can be fully absorbed by setting the multi-stage tail gas spray tower 6.

[0026] Optionally, the vaporizer, the mixer 2, the multi-stage reactor, the cooling absorption tower 5 and the multi-stage tail gas spray tower 6 are connected in sequence, and the product can be quickly synthesized through the above production line.

[0027] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application should not be limited to the embodiments shown herein, but should be consistent with the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An apparatus for chlorinating organic compounds, characterized in that, The device comprises a vaporizer for feeding organic compound and chlorine gas; a mixer connected with the vaporizer for mixing the organic compound and the chlorine gas; a multi-stage reactor through which the mixture of the organic compound and the chlorine gas flows successively; a cooling absorption tower connected with the multi-stage reactor for collecting reaction crude product.

2. The organic compound chlorination apparatus according to claim 1, wherein The device further comprises a multi-stage tail gas spray tower connected with the cooling absorption tower for absorbing tail gas discharged from the cooling absorption tower.

3. The organic compound chlorination apparatus according to claim 2, wherein The multi-stage tail gas spray tower comprises a first-stage tail gas spray tower, a second-stage tail gas spray tower and a third-stage tail gas spray tower connected successively.

4. The organic compound chlorination apparatus according to claim 1, wherein The vaporizer comprises a first vaporizer for vaporizing the organic compound and a second vaporizer for vaporizing the chlorine gas.

5. The organic compound chlorination apparatus according to claim 1, wherein The multi-stage reactor comprises a first-stage fluidized bed reactor and a second-stage fixed bed reactor connected with the first-stage fluidized bed reactor.

6. The organic compound chlorination apparatus according to claim 1, wherein The organic compound is 3-methylpyridine.

7. The organic compound chlorination apparatus according to claim 2, wherein The vaporizer, the mixer, the multi-stage reactor, the cooling absorption tower and the multi-stage tail gas spray tower are connected successively in series.

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