Method for preparing ethylene from calcium carbide through wet process

Abstract

The invention discloses a technology for preparing ethylene from calcium carbide through a wet process. Quick lime and coke are taken as raw materials, an electrode paste is used for adhering and is sintered into electrodes, and the raw materials are fused at high temperature of between 2,000 and 2,500DEG C in an electric furnace to form CaC2. The method is carried out in a wet acetylene generator, and a great amount of reaction heat is moved by means of excessive water. Theoretically, when the calcium carbide forms the ethylene, 1kg of calcium carbide requires 0.562kg of water; and actually, 1kg of calcium carbide requires 10 to 20kg of water.

Description

Technical field [0001] The invention relates to a chemical product, in particular to a technique for preparing acetylene by a calcium carbide wet method, which is suitable for the production of acetylene. Background technique [0002] Acetylene can be used for lighting, welding and cutting metal (oxyacetylene flame), and it is also the basic raw material for the manufacture of acetaldehyde, acetic acid, benzene, synthetic rubber, and synthetic fibers. [0003] Pure acetylene is a colorless and odorless gas. The acetylene produced from calcium carbide contains phosphine, arsine, hydrogen sulfide and other impurities and has a special pungent garlic smell and toxicity; it cannot be liquefied under normal pressure, and its sublimation point is -83.8℃, under the pressure of 1.19×105Pa, the melting point is -81℃; flammable and explosive, the explosion limit in the air is very wide, 2.5% to 80%; insoluble in water, easily soluble in petroleum ether, ethanol, benzene Other organic solven...

AI Technical Summary

Problems solved by technology

[0009] The problem to be solved by the present invention is to overcome the deficiencies of the prior art, the reaction temperature of the prior art is high, and the energy consumption is high

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