Device and technology for recovery of tetrachloroethylene
A tetrachloroethylene and process technology, applied in the field of devices for recycling tetrachloroethylene, can solve problems such as hindering chlorination reaction, and achieve the effects of improving conversion rate, improving efficiency and reducing energy consumption
Active Publication Date: 2014-12-10
LIAOCHENG LUXI CHEM ENG DESIGN
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Problems solved by technology
The condensate in the condenser of the quench tower contains tetrachlorethylene. If the condensate is returned to the reactor, it will not only hinder the chlorination reaction, but also easily generate by-products under high temperature conditions.
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[0015] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0016] like figure 1 Shown, a kind of device that reclaims tetrachlorethylene comprises reactor 1, quick cooling tower 2, carbon tetrachloride rectifying tower 10, flash tower 9, primary condenser 3, secondary condenser 4, tertiary condensation Device 5, pre-flash dryer 6, flash feed pump 7, flash preheater 8 and thick tetrachlorethylene storage tank 11, wherein, the discharge port of reactor 1 is connected with quenching tower 2 by pipeline, quenching Tower 2 is connected to the feed port of reactor 1 through a pipeline, and the side of the quick cooling tower 2 is connected to the tetrachlorethylene refining tower 13, and the upper port of the quick cooling tower 2 is connected to the inlet port of the primary condenser 3, and the primary condenser 3 The outlet end of the outlet port of the quench tower 2 is connected to the quenching tower 2 through...
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The invention discloses a device and a technology for recovery of tetrachloroethylene. The device comprises a reactor, a quench tower, a condenser, a carbon tetrachloride rectifying tower, and a flash tower, etc. The device and the technology have the advantages of simple process and low energy consumption. After flash-rectification of a three-level condensate solution, a light component, carbon tetrachloride and tetrachloroethylene can be separated, the light component returns to a second-level condenser, the carbon tetrachloride returns to the reactor, and the tetrachloroethylene can be directly extracted as a product after refining. Therefore, the conversion rate of chlorination reaction can be improved, and also the recovery rate of tetrachloroethylene can be enhanced, the reactant purity can be improved, the reaction conversion rate can be increased, and efficiency of the whole technology is enhanced. In the long run, the production cost of tetrachloroethylene is reduced, and the enterprise income is increased.
Description
technical field [0001] The invention relates to the field of tetrachlorethylene production, in particular to a device and process for recovering tetrachlorethylene. Background technique [0002] The chlorination reaction is: CH 3 Cl+Cl 2 +CCl 4 →C 2 Cl 4 +3HCl, the reaction is a reversible reaction, reducing the concentration of tetrachlorethylene in the reactor can promote the reaction to move to the right and increase the conversion rate of the reaction. [0003] In the existing tetrachlorethylene production process, the chlorination reaction product enters the quenching tower, and the light components of the quenching tower return to the chlorination reactor and the quenching tower after being mixed with the secondary condensate and the tertiary condensate. The condensate in the condenser of the quench tower contains tetrachlorethylene. If the condensate is returned to the reactor, it will not only hinder the chlorination reaction, but also easily generate by-product...
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IPC IPC(8): C07C21/12C07C17/269C07C17/38
Inventor 张明慧段兆铎范云珠吉红新田松于百胜
Owner LIAOCHENG LUXI CHEM ENG DESIGN