Fluidized bed distributor for chlorothalonil production

A technology of fluidized bed reactors and distributors, applied in chemical instruments and methods, organic chemistry, chemical/physical processes, etc., to achieve the effects of improving fluidization state, improving reaction stability, and avoiding excessive reaction temperature

Pending Publication Date: 2019-02-12
JIANGSU XINHE AGROCHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the problems existing in the prior art, the object of the present invention is to provide a fluidized bed distributor for the production of chlorothalonil. The adjustment of parameters such as the reaction rate can promote the uniform distribution of the reaction gas in the reactor, effectively avoid the problem of the catalyst clogging the distribution plate, improve the fluidization state, and improve the reaction stability. The obtained chlorothalonil product is of high quality

Method used

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  • Fluidized bed distributor for chlorothalonil production
  • Fluidized bed distributor for chlorothalonil production

Examples

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Embodiment 1

[0047] This embodiment provides a fluidized bed distributor for the production of chlorothalonil, the schematic diagram of the top view structure of the fluidized bed distributor is as follows figure 1 As shown, its partial side view is shown as figure 2 As shown, it includes a distribution plate 3 and an air cap 2. The distribution plate 3 is provided with a plurality of air holes 1, and each air hole 1 is correspondingly provided with an air cap 2. The air cap 2 is fixedly connected to the distribution plate 3. There is a gap between the edge of the gas cap 2 and the distribution plate 3; the opening ratio of the distribution plate 3 is 1.5%.

[0048] The distribution plate 3 is a circular plate with a diameter of 1000mm; the air holes 1 are arranged in an equilateral triangle on the distribution plate 3, the diameter of the air holes 1 is 12mm, and the distance between two adjacent air holes 1 is 100mm; The distribution plate 3 is provided with tubes, and the tubes corres...

Embodiment 2

[0051] This embodiment provides a fluidized bed distributor for the production of chlorothalonil. The fluidized bed distributor includes a distribution plate 3 and an air cap 2. A plurality of air holes 1 are provided on the distribution plate 3, each An air cap 2 is correspondingly arranged above the air hole 1, and the air cap 2 is fixedly connected to the distribution plate 3, and there is a gap between the edge of the air cap 2 and the distribution plate 3; the opening ratio of the distribution plate 3 is 0.5%. .

[0052] The distribution plate 3 is a circular plate with a diameter of 2000mm; the air holes 1 are arranged in an equilateral triangle on the distribution plate 3, the diameter of the air holes 1 is 20mm, and the distance between two adjacent air holes 1 is 160mm; The distribution plate 3 is provided with tubes, the tubes are respectively corresponding to the air holes 1, the upper end of the tubes is flush with the distribution plate 3, and the lower end passes...

Embodiment 3

[0055] This embodiment provides a fluidized bed distributor for the production of chlorothalonil. The fluidized bed distributor includes a distribution plate 3 and an air cap 2. A plurality of air holes 1 are provided on the distribution plate 3, each An air cap 2 is correspondingly provided above the air hole 1, and the air cap 2 is fixedly connected to the distribution plate 3, and there is a gap between the edge of the air cap 2 and the distribution plate 3; the opening rate of the distribution plate 3 is 3.2%. .

[0056] The distribution plate 3 is a circular plate with a diameter of 3000mm; the air holes 1 are arranged in an equilateral triangle on the distribution plate 3, the diameter of the air holes 1 is 25mm, and the distance between two adjacent air holes 1 is 200mm; The distribution plate 3 is provided with tubes, the tubes are respectively corresponding to the air holes 1, the upper end of the tubes is flush with the distribution plate 3, and the lower end passes ...

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Abstract

The invention provides a fluidized bed distributor for chlorothalonil production. The fluidized bed distributor includes a distribution plate and air caps, wherein the distribution plate is provided with a plurality of air holes, and the air caps are correspondingly arranged on the air holes. The air caps are fixedly connected to the distribution plate, and gaps are formed between the edges of theair caps and the distribution plate. The distribution plate has an opening ratio of 0.5%-5%. According to the arrangement of the air holes and the air caps in the fluidized bed distributor and the adjustment of the opening ratio, the uniform distribution of reaction gas is promoted, the fluidization state is improved, the stability of a reaction is improved, the product quality of the chlorothalonil is high, and the content of hexachlorobenzene is less than 10ppm; and meanwhile, the fluidized bed distributor effectively solves the problem that a catalyst is prone to sintering and blocking thedistribution plate, the service life of the catalyst is prolonged, and the production cost of the chlorothalonil is reduced.

Description

technical field [0001] The invention belongs to the technical field of fluidization equipment, and relates to a fluidized bed distributor used for the production of chlorothalonil. Background technique [0002] Chlorothalonil, whose chemical name is tetrachloroisophthalonitrile, is a protective fungicide with high efficiency, low toxicity, broad spectrum and low residue. It is widely used in the control of fungal diseases in agriculture and forestry, especially in vegetables. , fruit and other cash crops; in addition, chlorothalonil also has important uses in the field of mildew-proof industry, such as the manufacture of mildew-proof coatings, mildew-proof wallpaper, electrical appliances, wood and other mildew-proof, the production scale at home and abroad Constantly expanding, it has become one of the large-tonnage and excellent pesticide varieties in the world. [0003] Chlorothalonil is usually prepared by gas-phase chlorination, and its production process is mainly div...

Claims

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Application Information

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IPC IPC(8): B01J8/24B01J8/18C07C253/30C07C255/51
CPCB01J8/1818B01J8/24C07C253/30C07C255/51
Inventor 王海波王春云禚文峰
Owner JIANGSU XINHE AGROCHEM
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