A kind of reactor that can be used to prepare gas-phase hydrogen cyanide

Abstract

The invention discloses a reactor used for preparing gas-phase hydrogen cyanide. The reactor used for preparing gas-phase hydrogen cyanide comprises an upper sealing head, a lower sealing head, a shell side and reaction tubes, wherein the reaction tubes are arranged in the shell side; the upper sealing head and the lower sealing head are respectively and correspondingly mounted at the upper end and the lower end of the shell side; the reactor used for preparing gas-phase hydrogen cyanide also comprises a feed gas distribution device, a temperature monitoring device, a heat-transfer medium flow guide device and a hollow flow guide cylinder; the feed gas distribution device is mounted in the top end of a main body structure of the tubular reactor; the temperature monitoring device is inserted from the top end of the main body structure of the tubular reactor; the heat-transfer medium flow guide device is mounted on the outer part of the shell side; flow guide holes are formed in an inner wall surface, being in contact with the heat-transfer medium flow guide device, of the shell side; the hollow flow guide cylinder and the reaction tubes are mounted in the shell side in a mixing manner. The reactor used for preparing gas-phase hydrogen cyanide has the beneficial effects of being capable of generating easily-separated hydrogen cyanide gas and stably and effectively dissipating reaction heat, an accurate reaction temperature monitoring system is arranged, the feed gas distribution effect is good, the reaction conversion rate is high; a catalyst is low in loss during use and long in service life.

Description

technical field [0001] The invention belongs to the technical field of chemical production process equipment, and in particular relates to a reactor that can be used to prepare gas-phase hydrogen cyanide. Background technique [0002] The traditional process uses the methanol ammoxidation method to produce hydrogen cyanide. The production principle is that the mixed raw material gas composed of methanol, ammonia and air in a certain proportion is catalytically reacted at a certain temperature and pressure in a fixed-bed reactor equipped with a catalyst. A mixed gas composed of hydrogen cyanide, carbon monoxide, carbon dioxide, water vapor and unreacted methanol, ammonia, oxygen, nitrogen, etc. is obtained. [0003] The reaction is: CH3OH+NH3+O2→HCN+3H2O [0004] BASF announced in 2009 (CN101511734A): Formamide production process has the problems of high reaction temperature and low conversion rate. Aiming at the problem of easy formation of carbon black in the reaction, hi...

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Problems solved by technology

[0010] This invention is suitable for the above two methods, by adding at least one sulfur-containing compound in the reaction mixed feed, to improve the yield of the reaction, but this invisibly increases the cost of the reaction, and uncertain factors

And the addition time of sulfide is also an important influencing factor, which is more troublesome to operate and increases labor costs

[0011] Nippon Chemical Industry Co., Ltd. announced in 1998 (CN1202458A): use methanol ammonia as a raw material to react the method for producing prussic acid in the presence of oxygen; details not mentioned

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