Diazotization continuous tubular reactor

Abstract

The invention discloses a diazotization continuous tubular reactor which comprises liquid storage tanks, a tubular reactor, a diazotization salt separation storage tank and a circular cooling system, wherein all liquid storage tanks are connected with the tubular reactor through a mixer which can be used for sufficiently mixing all reaction materials and feeding the mixture into the tubular reactor; a flow controller is arranged between each liquid storage tank and the mixer; the mixer and the tubular reactor are in sealed connection; the circular cooling system comprises a quencher, a mediumstorage tank, a quencher nozzle and a recycling mechanism, wherein the quencher is used for connecting the outlet of the tubular reactor with the liquid inlet tube of the diazotization salt separation storage tank; the medium storage tank is used for storing a cooling medium; the quencher nozzle is used for quickly spraying the cooling medium into the quencher; the recycling mechanism is connected with the diazotization salt separation storage tank and used for recycling the cooling medium and cooling the recycled cooling medium; the recycling mechanism and the medium storage tank are connected; the cooling medium is low-temperature high-pressure CO2; and the top of the diazotization salt separation storage tank is provided with an exhaust port. The diazotization continuous tubular reactor disclosed by the invention has the advantages of high reaction yield, low energy consumption and strong generality.

Description

technical field [0001] The invention relates to a diazotization continuous tubular reactor. technical background [0002] The diazotization reaction is a process in which an aromatic amino compound reacts with nitrous acid in an acidic environment to form a diazotized salt. The diazotized salt has a strong chemical activity and can undergo substitution, reduction, coupling, hydrolysis and other reactions to form various types of diazotization salts. Compounds are widely used in industries such as dyes, photosensitive materials, medicine and pesticides. [0003] The diazotization reaction is a demanding reaction. The reaction temperature, the amount of sodium nitrite and inorganic acid must be controlled to ensure that the materials are well mixed, and the reaction medium is highly corrosive, so the diazotization reaction has a great impact on the reactor. high expectation. At present, most of the diazotization reactions in the industry adopt a stirred tank batch production...

AI Technical Summary

Problems solved by technology

At present, most of the diazotization reaction in industry adopts the batch production process of stirred tank, and the reaction is carried out at low temperature, the reaction time is long and the efficiency is low

Some patents for continuous diazotization reaction devices have appeared abroad, but most of them are based on the stirred tank method, which does not improve the reaction yield much, but increases energy consumption instead; patents for diazotization reaction devices based on tubular reactor technology There are also reports, but the reactor is highly targeted and not universal

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