Process for preparing undecylenic acid by scission of castor oil

Abstract

The invention relates to an engineering plastic process for producing nylon-11 by caster oil and particularly relates to a method for cracking the caster oil to produce undecylenic acid, which belongs to the process flow and solves the existing problems of lead pollution and easy coking in the technology that the caster oil is cracked by the technique of cauldron-typed lead melter. The method is as follows: the caster oil and a catalyst of benzoyl peroxide solution are mixed and preheated to 150-200 DEG C, the quality proportion of which is 1000:3-7:1100-1300 with over heated water vapor of 500-600 DEG C, which enters into a loading tube from the mouth of the loading tube, enters into the top of the cracking stove body from the outlet of the loading tube, and enters into a reacting space along a screw panel; the cracking stove body at the upper part of a tower-typed cracking stove is heated to 500-600 DEG C by an electric heater to crack to produce undecylenic acid and heptaldehyde products. The engineering plastic process for producing nylon-11 by caster oil has the advantages of permanent reaction, strongly continuous operability, ,which is suitable for the production of industrialized settings and can improve the operating environment, can overcome the hurt to body and spirit of the operator by the lead pollution, and has low possibilities of coking, high yield and simple setting producing technologies.

Description

Method for preparing undecylenic acid by cracking castor oil technical field The invention relates to a process for producing nylon-11 engineering plastics from castor oil, in particular to a method for producing undecylenic acid by cracking castor oil in the process flow. Background technique Polyundecamide plant engineering plastic (H[NH(CH2)10CO]nOH) is an important high-tech new material. It is an important variety of polyamide engineering plastics and an irreplaceable resin. It uses castor oil as raw material. Compared with other products, it has low density, high mechanical strength, stable performance, acid and alkali resistance, and excellent electrical insulation performance. Due to these excellent and unique properties, it is widely used in many fields such as automobile industry, electronic appliances, medical equipment, ordnance and civil industry. The existing castor oil route synthesis nylon-11 (polyundecamide) engineering plastics technology is a chemical ...

AI Technical Summary

Problems solved by technology

The present invention provides a method for producing undecylenic acid by cracking castor oil in order to solve the problems of lead pollution and easy coking in the technology of cracking castor oil in the existing kettle-type lead-melting furnace technology

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