Method for producing liquid sodium cyanide by tailed-oil thermal-pyrolysis
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A production method, sodium cyanide technology, applied in the direction of metal cyanide, simple alkali metal cyanide, chemical industry, etc., can solve the problems of large amount of three wastes, large energy consumption, etc., to improve conversion rate, reduce heat loss, and produce The effect of process safety and easy control
Active Publication Date: 2007-11-21
兰州寰球工程有限公司
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This method can directly produce solid sodium cyanide, but due to the la...
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[0022] The production method of liquid sodium cyanide product comprises the following processing steps:
[0023] ① First, raffinate oil (generally with a density of 600-800kg / m 3 Raffinate oil) and liquid ammonia are vaporized and mixed at a weight ratio of 1:2 to 1:5, then put into a high-temperature cracking furnace, and use petroleum coke (the sulfur content of petroleum coke is 0.1% to 0.5%; petroleum coke The particle size is 10-50 mesh) as the heat carrier, thermal cracking is carried out at 1300-1500 ° C to generate cracked gas containing hydrocyanic acid; in order to effectively improve the conversion rate of raffinate oil, the temperature of the gas outlet of the high-temperature cracking furnace It can be controlled at 700-1000°C by adjusting the amount of cooling water in the cracking furnace.
[0024] ② The waste heat is recovered from the pyrolysis gas through the waste heat boiler, after decoking and cooling, the hydrocyanic acid is continuously absorbed by the ...
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Abstract
A method for producing liquefied sodium cyanide by waste oil thermal cracking is carried out by vaporizing while mixing waste oil with liquid ammonia in proportion of 1:2-1:5, putting them into cracking reactor, taking petrol coke as heat carrier, thermal cracking at 1300-1500 degree to obtain pyrolysis gas containing oxygen-hydrogen acid, recovering pyrolysis gas waste heat by waste hot boiler, removing coke, cooling, absorbing continuously by liquid sodium hydrate to obtain liquid sodium cyanide product, firing by waste gas combustion system, recovering waste heat and absorbing tail gas from liquid sodium cyanide. It's safe, convenient, cheap and controllable and has no environmental pollution.
Description
technical field [0001] The invention belongs to the technical field of chemical industry, and relates to a production process of chemical raw material-liquid sodium cyanide, in particular to a method for producing liquid sodium cyanide by thermal cracking of raffinate oil. Background technique [0002] Cyanide series products are basic chemical raw materials with special properties and uses. They are widely used in organic synthesis, precious metal refining, electroplating, metal heat treatment, medicine, dyes, pigments, and synthetic materials (such as organic glass, nitrile rubber, etc.) , photography, etc. In addition, it can also be used in metal abrasives, insecticides, fumigants, reducing agents, etc. At present, it is mainly used in the production of downstream fine chemical products such as melamine, methacrylic acid series, methionine, lactic acid, DMF, etc. The market prospect is very broad. [0003] The industrial production method of liquid sodium cyanide (molec...
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