Method and device for extracting caprolactam crude oil

Abstract

The invention relates to a method and a device for extracting caprolactam crude oil, and provides the method for extracting the crude caprolactam oil. The method comprises the following steps: (a), filtering the crude caprolactam oil to filter out large particles in the crude oil so as to prevent a blockage phenomenon during subsequent extraction; (b), mixing the filtered crude caprolactam oil with benzene, and extracting the crude caprolactam oil by using the benzene; (c), after completion of the extraction, separating a benzene-caprolactam solution from residual liquid. The invention furtherprovides the device for extracting the crude caprolactam oil.

Description

technical field [0001] The present disclosure relates to a method and a device for extracting caprolactam crude oil, more specifically, to a method and a device for filtering the caprolactam crude oil with a filter and extracting and separating the caprolactam crude oil with an extraction tower. Background technique [0002] In the petrochemical industry, caprolactam, as one of the important organic chemical raw materials, is mainly used to produce polyamide chips through polymerization. It is also a raw material for the production of polyester fibers, engineering plastics, plastic films and other products. There are many industrial preparation methods of caprolactam, such as: hexane-hydroxylamine method, toluene method, benzene method. [0003] At present, what is widely used by chemical companies is the extraction of rotating disk tower benzene. However, this method is limited by the rotary tower. First of all, the turntable tower needs to be driven by a motor, so the an...

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Problems solved by technology

[0007] This disclosure provides a novel method and device for extracting caprolactam crude oil, using fiber mass transfer-coalescence separation technology, first using fiber filler with mass transfer function to mix benzene and filtered caprolactam crude oil, Extract caprolactam into benzene; then use the coalescing and separating fiber packing to separate the benzene liquid from the raffinate, which solves the problems of high power consumption, low extraction and separation efficiency, severe motor shaft wear and harsh sealing requirements in traditional turntable towers and other problems, the extraction and separation effect of the original rotary table tower can be achieved with a 1 / 2 volume extraction tower

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