Self circulation heat exchange method for materials in production of chlorinating paraffin-52 and chlorination reaction device therefor

Abstract

The invention provides a self circulation heat exchange method for materials in production of chlorinating paraffin-52 and a chlorination reaction device therefor. The method comprises the steps that: a, liquid paraffin is added into an automatic circulation main and auxiliary chlorination reaction kettle provided with a catalytic light source and a heat exchanger outside the kettle, and a catalytic light source lamp is turned on; b, liquid chlorine is introduced into a gasification kettle, stabilized by an accumulator still, and is introduced into a main kettle of the chlorination reaction kettle at a chlorine flowrate of between 200 and 230Kg / h, the chlorination temperature is controlled to be between 100 and 110 DEG C, the reaction is stopped when the chlorine content analyzed in a taken sample is between 50 and 54 percent to obtain a crude product of the chlorinating paraffin-52, dissolved chlorine and chlorine hydride in the crude product of the chlorinating paraffin-52 are removed by a degasification kettle, and then a stabilizing agent is added to obtain a finished product of the chlorinating paraffin-52; and c, gas coming out of the main kettle of the chlorination reactionkettle enters an auxiliary kettle of the chlorination reaction kettle, gas coming out of the auxiliary kettle of the chlorination reaction kettle passes through a graphitic absorber, a water falling film is used for absorbing the chlorine hydride in the gas to prepare hydrochloric acid, micro chlorine and chlorine hydride contained in tail gas which is discharged by the graphic absorber pass through a waste gas processor and are absorbed by water solution of sodium hydroxide to generate sodium hypochlorite and sodium chloride.

Description

technical field [0001] The invention relates to a production process of chlorinated paraffin-52 (abbreviated as chlorinated paraffin-52), in particular to a material self-circulating heat exchange method in the production of chlorinated paraffin-52 and a chlorination reaction device thereof. Background technique [0002] Chlorinated paraffin-52 (referred to as chlorine wax-52) is C 12 ~C 18 Chlorinated derivatives of n-alkanes having the general formula C n h 2n+2-m Cl m , wherein the chlorine content is 50% to 54% by mass (calculated as 52% in this article). It is insoluble in water and lower alcohols, but soluble in mineral oil, aromatic hydrocarbons, ether, acetone, etc. It has the characteristics of non-combustibility, non-toxicity, anti-oxidation, etc., and is compatible with plasticizers. It can be used as auxiliary plasticizer and flame retardant in plastic and rubber products, and can be used as extreme pressure agent in lubricating oil. The theoretical chlorin...

AI Technical Summary

Problems solved by technology

While the technology removes excess heat, it also has drawbacks

One is to increase equipment investment and maintenance costs, the other is to consume electric energy, and the third is under the conditions of higher temperature and the presence of chlorine and hydrogen chloride, once the circulating pump fails, it will easily cause safety and environmental pollution accidents

[0015] To sum up, since the traditional production of Chlorine Wax-52 adopts thermal chlorination process, the reaction is exothermic, and the heat exchange area of ​​the reactor itself is too small. If the amount of chlorine fed is too large, the temperature of the reaction material will exceed 105°C , causing carbonization and decomposition, thereby affecting the quality of chlorowax-52, so the amount of chlorine passing is generally only 100Kg / h, which limits the reaction speed of chlorowax-52, reduces the utilization rate of equipment, and increases production costs

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