A kind of production method and production equipment of phosphorus trichloride automatic gas supplement
A phosphorus trichloride and production method technology, applied in the direction of phosphorus halide/oxyhalide, etc., can solve problems such as blockage of phosphate esters, reduction of phosphorus trichloride yield, explosion of tail gas pipeline, etc., to reduce waste gas and reduce The effect of producing side reactions and saving production costs
Active Publication Date: 2015-11-25
HUBEI TAISHENG CHEM
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Problems solved by technology
For phosphorus trichloride manufacturers, most of them adopt the method of natural air supplementation, that is, the air in the atmosphere is used to balance the pressure in the reaction system, but the air contains a lot of water, which enters the production system with the air Reacting with phosphorus trichloride in the medium will not only reduce the yield of phosphorus trichloride, but also produce phosphate substances to block the exhaust pipe and cause explosion accidents
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Embodiment 1
[0017] The production method of phosphorus trichloride automatic gas supply, the yellow phosphorus is input into the chlorination kettle by the phosphorus pump method or the hydraulic phosphorus method to react with chlorine gas, and the temperature of the chlorination reaction is controlled at 60°C-100°C, wherein the reaction The liquid temperature in the kettle is 80°C-95°C, and the steam temperature on the outer wall of the reactor is 75°C-90°C. After the generated phosphorus trichloride gas is rectified, part of the phosphorus trichloride gas is condensed by the condenser and then returned to the reactor, and part of it enters the phosphorus trichloride metering tank and is put into the finished product tank after passing the test. Nitrogen gas supply system and gas check valve are added to the tail gas pipeline of the chlorination reaction system and the finished product tank system in production. A pneumatic regulating valve is installed between the nitrogen gas supply s...
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The invention provides a phosphorus trichloride production method and device capable of automatically supplementing gas. A nitrogen gas supplementing system and a gas regulating valve are adopted to control system pressure to 0-1 MPa, and the generation of such side reactions as phosphorus trichloride and water vapor react to generate phosphate is effectively reduced on the production basis of optimizing the process. Specifically, the nitrogen gas supplementing system and a gas check valve are additionally arranged on a tail gas pipeline of a chlorination reaction system and a finished product slot system in phosphorus trichloride production. The method and the device have the advantages that water vapor in air is prevented from entering a production system and reacting with the phosphorus trichloride, so that the yield of the phosphorus trichloride is improved, and a safety accident generated when a pipeline is blocked by phosphate substances is also avoided. Moreover, the production cost is reduced, the generation of side reactions is reduced, and the yield of the phosphorus trichloride is increased by0.5%, and therefore, the production method and the production device can be used for large-scale industrial production.
Description
technical field [0001] The invention relates to a production method and equipment for automatic gas supplementation of phosphorus trichloride. Specifically, a pneumatic regulating valve and a tail gas check valve are used in the production system to control the pressure of the system. Background technique [0002] In recent years, production accidents in domestic phosphorus trichloride enterprises are not uncommon. Personnel burns and explosion accidents occur frequently in many enterprises. An accident brings not only economic losses to the enterprise, but even disability, Death, for enterprises, is facing social responsibility and survival. Therefore, only by controlling production costs, independent innovation, improving production efficiency and safe production can enterprises become more competitive. Phosphorus trichloride is a colorless and clear fuming liquid. It decomposes into phosphorous acid and hydrogen chloride when it meets water and air, and white irritating ...
Claims
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IPC IPC(8): C01B25/10
Inventor 冀小雄胡波
Owner HUBEI TAISHENG CHEM