The chlorination tower of the cooling liquid outside the tower and its operation process
A technology of chlorination tower and downflow, which is applied to the chemical method of reacting liquid and gas medium, organic chemistry, carbon-based compound preparation, etc., which can solve the problems of low yield and high failure rate, and achieve high yield of finished products , production cost reduction, easy maintenance effect
Active Publication Date: 2017-03-08
NANTONG JIANGSHAN AGROCHEM & CHEM LIMITED LIABILITY
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Problems solved by technology
[0008] To overcome the problems of high failure rate and low yield of traditional ethanol chlorination equipment, and provide an external downflow chlorination tower with simple equipment structure, easy maintenance, flexible control, and reduced production costs and its operating process
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[0033] Such as figure 1 , figure 2 The falling liquid chlorination tower outside the tower shown is composed of multiple tower sections connected up and down. The top of the top tower section has a raw alcohol inlet, each tower section has an empty cylinder, and a tray is connected to the lower end of the empty cylinder. There is a riser pipe and a breather cap inside the empty cylinder, and the breather cap is covered on the riser pipe, and the riser pipe supplies the excess gas of the tower section below to enter the tower section; there are large holes on the tray, which are used as the air intake of the riser pipe There are many tiny air holes on the wall of the lower end of the vent cap;
[0034] The wall surface on one side of the empty cylinder is provided with a liquid inlet for the liquid from the upper tower section to enter the tower section; the wall surface on the other side of the empty cylinder has a liquid outlet, and the liquid outlet is connected to a conne...
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Abstract
The invention provides an outer-tower downcomer chlorination tower and a running process thereof. Multiple tower sections are assembled into a whole body up and down; each tower section is provided with an empty cylinder, a tower tray is connected with the lower end of the empty cylinder, a riser and a vent cap are arranged in the empty cylinder, the vent cap covers the riser, surplus gas of a lower tower section penetrates through the riser and then enters the tower section, and multiple micro air holes are formed in the wall surface of the lower end of the vent cap; a liquid inlet is formed in the wall surface of one side of the empty cylinder, and liquid of an upper tower section penetrates through the liquid inlet and then enters the tower section; a liquid outlet is formed in the wall surface of the other side of the empty cylinder and is communicated with a connecting pipe, which is arranged vertically upwards, the connecting pipe is communicated with a downcomer, and the downcomer is communicated with a liquid inlet of the lower tower section; a balance air inlet is formed in the middle upper part of one side of the empty cylinder and is communicated with the upper end of the connecting pipe. The chlorination tower has the advantages that the structure is simple, the maintenance rate is low, the temperature and the pressure drop of a reaction system can be accurately controlled, and the purity of reaction products is high.
Description
technical field [0001] The invention relates to production equipment and a production process of trichloroacetaldehyde. Background technique [0002] Trichloroacetaldehyde (or chloral) is one of the important halogen derivatives of hydroxyl compounds. It is a colorless and volatile oily liquid with a pungent odor. The boiling point is 97.8°C, the melting point is -57.5°C, and the relative density is 1.5121. It can be dissolved in water, ethanol, ether and chloroform, and hydrated to form chloral hydrate (or chlorine oil). Chloral can be widely used in the production of pesticides, medicines and organic synthesis industries. Its production methods include ethanol chlorination and acetaldehyde chlorination. Now the industry mainly adopts ethanol tower chlorination. The raw material reacts with chlorine and water at 80-90°C to form chlorine oil, which is then reacted with concentrated sulfuric acid and obtained by distillation. [0003] The reaction mechanism of the ethanol c...
Claims
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IPC IPC(8): B01J10/00C07C45/63C07C47/16
Inventor 孟长春韩曙东陆沈华徐勇张海滨
Owner NANTONG JIANGSHAN AGROCHEM & CHEM LIMITED LIABILITY