Production process of chlorinated paraffin

Abstract

The invention discloses a production process of chlorinated paraffin. The production process comprises a reaction kettle group and an absorption kettle, wherein the reaction kettle group comprises a first reaction kettle, a second reaction kettle, a third reaction kettle, a fourth reaction kettle and a fifth reaction kettle which are sequentially communicated with one another; paraffin oil sequentially flows through the interiors of the reaction kettle group and is then subjected to a light-catalyzed reaction with chlorine; reaction tail gas of each reaction kettle is introduced into the nextreaction kettle; the reaction tail gas of the fifth reaction kettle is introduced into an absorption kettle and mixed with pure paraffin oil. The high-purity paraffin oil is used for absorbing the chlorine from the tail gas, the paraffin oil with the chlorine is used as a raw material of the first reaction kettle, and the tail gas of the absorption kettle is discharged into a tail gas main pipe and is then sent to a tail gas treatment system. Compared with the prior art, the production process obviously reduces the content of the chlorine in the tail gas discharged into the tail gas main pipe,thus increasing raw material resource utilization rate.

Description

technical field [0001] The invention relates to a paraffin processing technology, in particular to a chlorinated paraffin production technology. Background technique [0002] Chlorinated paraffin is a chlorinated derivative of paraffin. It has the advantages of low volatility, flame retardancy, good electrical insulation, and low price. It can be used as a flame retardant and an auxiliary plasticizer for PVC, and is widely used in the production of cables Materials, floor materials, hoses, artificial leather, rubber and other products as well as additives used in coatings, plastic track, lubricating oil, etc. [0003] For example, the Chinese patent whose publication number is CN105112100B discloses a continuous production process of chlorinated paraffin. The production process changes the recovery and utilization mode of tail gas, including the reactor group of the first reactor to the sixth reactor, and the chlorine gas is separated from the chlorine supply main pipe. Ent...

AI Technical Summary

Problems solved by technology

Its shortcoming is that in the first reactor to the sixth reactor, the content of chlorinated paraffin in the liquid phase is constantly increasing, and the substitution reaction tends to be balanced, and the tail gas of the fifth reactor passing into the sixth reactor has A large amount of hydrogen chloride makes the reaction progress limited, the actual reaction amount is small, and the remaining chlorine gas enters the tail gas main pipe and its utilization rate is not high

[0004] Another example is that the Chinese patent with the notification number CN105925312B discloses a method for preparing chlorinated paraffin, in which the tail gas of the fourth reactor and the fifth reactor is treated with saturated brine and anhydrous calcium chloride to remove hydrogen chloride therein , to promote the substitution reaction in the fifth reactor and the sixth reactor, which adds new auxiliary materials, which increases the production cost and the recovery of hydrogen chloride in saturated brine is difficult, which needs to be improved

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