Method and device for preventing m-phthalonitrile from being caked

A technology of isophthalonitrile and m-xylene, which is applied in the field of preparation of fine organic compounds, can solve problems such as increasing labor force and labor intensity, not being able to increase packaging capacity, and easy adhesion and agglomeration, so as to reduce labor intensity and reduce dust pollution , smooth surface effect

Active Publication Date: 2017-02-22
TAIZHOU BAILLY CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The structural characteristics of isophthalonitrile crystals are very special. The crystals are in the shape of needles or flakes. During the cooling and crystallization process, the crystals are easy to stick and agglomerate. Therefore, the product is packaged in 25 kg / bag, and the packaging capacity cannot be increased.
Moreover, 25 kg of isophthalonitrile products still stick together into lumps, making separation difficult, which increases labor and labor intensity in the production and feeding of downstream products chlorothalonil

Method used

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  • Method and device for preventing m-phthalonitrile from being caked

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Effect test

Embodiment 1

[0020] A method for preventing the agglomeration of isophthalonitrile in this embodiment, ammonia and m-xylene are vaporized and enter the fluidized bed through the vaporizer to carry out the ammoxidation reaction, and the product enters the thin-walled receiver through the oil cooler to carry out Cooling and receiving, the product is washed intermittently into the washing tank with water, centrifuged, and dried. After the product is dried, it enters the silo through the auger conveyor, and a granulator and a vibrating screen are added behind the silo, and at the same time, the air is transported to the bag for dust removal; Isophthalonitrile dry powder is agglomerated into dense and hard plates under high pressure, and the plates are crushed by rolling. The material is conveyed by a single screw, and the material is brought into the gap between two rollers that rotate in opposite directions. The surface of the roller is gear-shaped. At the same time, olive-shaped grooves are c...

Embodiment 2

[0024] Such as figure 1 As shown, a device for preventing the agglomeration of isophthalonitrile in this embodiment includes a drying tower 1, a cyclone dust removal device 2, a bag dust removal device 3, an auger conveyor 4, a silo 5, and a granulator 6 , vibrating screen 7 and packing device 8; described drying tower 1, cyclone dedusting device 2, auger conveyor 4, feed bin 5, granulator 6, vibrating screen 7 and packing device 8 are arranged in series successively, and described cyclone dedusting device The dust outlet of the device 2 is connected with the bag dust removal device 3, and the dust outlet of the vibrating screen 7 is connected with the silo 5 through the air conveying pipeline.

[0025] The granulator 6 is fed by a single-screw feeder; the granulator includes two rollers that rotate in opposite directions, the surface of the rollers is gear-shaped, and grooves are grooved on the inner edge of the rollers to form an olive shape.

[0026] A bag dust removal dev...

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Abstract

The invention relates to a method and a device for preventing m-phthalonitrile from being caked. After being gasified, ammonia gas and the m-phthalonitrile enter a fluidized bed to be subjected to an ammoxidation reaction; a resultant enters a thin-wall material collector through an oil cooler and is subjected to cooling and material collection; a product is intermittently washed into a washing tower by water and then is washed, centrifuged and dried; after being dried, the product is conveyed into a stock bin through a packing auger conveyor; after being crushed, the product is added into a granulator by adopting a single-screw-rod charging machine and then is prepared into olive-shaped grains; then the olive-shaped grains are sieved by a vibration sieve device; m-phthalonitrile dried powder blocks are crushed and granulated and then are sieved to obtain finished-product grains; the m-phthalonitrile grains are discharged through a vibration sieve and packaged. According to the method and the device, provided by the invention, the m-phthalonitrile is prepared into the olive-shaped finished-product grains through the granulator and discharged materials of the vibration sieve are automatically packaged; the product is grain-shaped, the density is increased and the product is not caked, so that ton bags are used for packaging; the labor intensity of subsequent work can be alleviated and the labor force is reduced; meanwhile, dust pollution is also alleviated.

Description

technical field [0001] The invention relates to a method and a device for preventing the agglomeration of isophthalonitrile, belonging to the technical field of fine organic compound preparation. Background technique [0002] Isophthalonitrile is an important chemical product. It is an intermediate for the preparation of fine organic compounds. It is an important raw material for the synthesis of pesticide fungicide chlorothalonil. It can also be used for the preparation of plastics, synthetic fibers and epoxy resins. Raw materials for products such as curing agents. [0003] In the original production process, ammonia and m-xylene are vaporized and enter the fluidized bed through the vaporizer for ammoxidation reaction. The product enters the thin-walled receiver through the oil cooler for cooling and receiving, and the product is washed intermittently into the washing tank for washing. After centrifugation, drying and cyclone dust removal, the product of isophthalonitrile...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C253/28C07C255/51
CPCC07C253/28C07C255/51
Inventor 汪静莉刘志平潘兵波杨露王中连张海涛
Owner TAIZHOU BAILLY CHEM CO LTD
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