Process for preparing undecylenic acid by scission of castor oil

A technology of castor oil and enoic acid, which is applied in chemical instruments and methods, preparation of carboxylate, preparation of organic compounds, etc., can solve problems such as easy coking and lead pollution, achieve less coking, simple manufacturing process, and high yield Effect

Inactive Publication Date: 2011-06-15
山西宏远科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 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 process

Method used

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  • Process for preparing undecylenic acid by scission of castor oil
  • Process for preparing undecylenic acid by scission of castor oil

Examples

Experimental program
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Effect test

Embodiment 1

[0010] Embodiment 1, as attached figure 1 Shown schematically, a kind of tower type cracking furnace is made up of the cracking furnace body 1 of the upper part and the condenser 7 that is communicated with the cracking furnace body 1 bottom, and the lower end of the condenser 7 is provided with a cracking material outlet 10, and the cracking furnace body is 1 week The side is an electric heating device 5, and the inside of the cracking furnace body 1 is vertically provided with a feeding pipe 2, and the feeding pipe inlet 6 at the bottom of the feeding pipe 2 is located at the outside of the cracking furnace body 1, and the surrounding side of the feeding pipe 2 is provided with a spiral slice 3. The upper part of the cracking furnace body 1 is provided with a temperature measuring port 4 .

[0011] A method for producing undecylenic acid by cracking castor oil, dissolving castor oil and catalyzer benzoyl peroxide and preheating superheated steam at 150°C and 500°C in a mass...

Embodiment 2

[0013] A method for producing undecylenic acid by cracking castor oil, dissolving castor oil and catalyst benzoyl peroxide and preheating superheated steam at 200°C and 600°C in a mass ratio of 1000:7:1300, by The feeding pipe inlet 6 enters the feeding pipe 2, enters the top of the cracking furnace body 1 from the feeding pipe outlet 11, enters the reaction space along the spiral piece 3, and heats the cracking furnace body 1 on the tower cracking furnace top with the electric heater 5 to Cracking at 600°C produces a mixed gas of undecylenic acid, heptanal and other by-products. The gas flows to the lower end of the cracking tower body 1 and enters the condenser 7 to condense. Undecylenic acid and heptanal products are produced. The yield of undecylenic acid is about 36.5%.

Embodiment 3

[0015] A kind of castor oil cracking method that undecylenic acid is prepared, castor oil and catalyzer benzoyl peroxide are dissolved and matched and the superheated steam that is preheated to 180 ℃ and 550 ℃ is by the mass ratio of 1000:35:1200, by The feeding pipe inlet 6 enters the feeding pipe 2, enters the top of the cracking furnace body 1 from the feeding pipe outlet 11, enters the reaction space along the spiral piece 3, and heats the cracking furnace body 1 on the tower cracking furnace top with the electric heater 5 to Cracking at 550°C produces a mixed gas of undecylenic acid, heptanal and other by-products. The gas flows to the lower end of the cracking tower body 1 and enters the condenser 7 to condense. Undecylenic acid and heptanal products are produced. The yield of undecylenic acid is about 35.3%.

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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

technical field [0001] 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 [0002] Polyundecamide plant engineering plastics (H[NH(CH 2 ) 10 CO] n OH) 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. [0003] The existing castor oil route synthesis nylon-11 (polyundecamide) engineering plastics technology is a chemical synthesis technology composed...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C57/12C07C51/285C07C47/02C07C45/27
Inventor 张建明
Owner 山西宏远科技股份有限公司
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