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Process for preparing bromoundecanoic acid by tower type addition of undecylenic acid

A technology of undecanoic acid and enoic acid tower, which is applied in the preparation of carboxylate, chemical instruments and methods, and the preparation of organic compounds, and can solve the problems of large project investment, poor economic benefits, intermittent operation, etc., and achieve good investment returns , easy processing and simple structure

Inactive Publication Date: 2011-05-04
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] In order to solve the problems of discontinuous operation, huge equipment, large project investment (high cost) and poor economic benefits in the existing bromine addition technology of undecylenic acid, the present invention provides a tower-type addition bromine production method of undecylenic acid Method for Substituting Undecanoic Acid

Method used

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  • Process for preparing bromoundecanoic acid by tower type addition of undecylenic acid
  • Process for preparing bromoundecanoic acid by tower type addition of undecylenic acid

Examples

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Embodiment 1

[0013] A method for preparing bromoundecanoic acid by tower bromine addition of undecylenic acid, using a reaction tower with a raw material upper inlet and a raw material lower inlet, the ceramic structured packing with a porosity of 60% is housed in the reaction tower, and the ten Undecylenic acid and toluene liquid are formulated into undecylenic acid toluene solution at a mass ratio of 1:3.5, and then sprayed into the tower from the top of the tower, and hydrogen bromide gas is continuously fed from the bottom of the tower at the same time. The two materials are ten The molar ratio of monoenoic acid to hydrogen bromide is 1:1.1. Under the condition of controlling the reaction temperature at 20-30°C, continuous reverse contact occurs to generate bromoundecanoic acid solution, which is then fed into bromoundecanoic acid solution from the bottom of the reaction tower. Acid and toluene separation process, that is, bromoundecanoic acid product.

Embodiment 2

[0015] A method for preparing bromoundecanoic acid by tower bromine addition of undecylenic acid, using a reaction tower with a raw material upper inlet and a raw material lower inlet, the ceramic structured packing with a porosity of 60% is housed in the reaction tower, and the ten Undecylenic acid and toluene liquid are made into undecylenic acid toluene solution in a mass ratio of 1:3, and then sprayed into the tower from the top of the tower, and hydrogen bromide gas is continuously fed from the bottom of the tower at the same time. The two materials are ten The molar ratio of monoenoic acid to hydrogen bromide is 1:1.0. Under the condition of controlling the reaction temperature at 20-30°C, continuous reverse contact occurs to generate bromoundecanoic acid solution, which is then fed into bromoundecanoic acid solution from the bottom of the reaction tower. Acid and toluene separation process, that is, bromoundecanoic acid product.

Embodiment 3

[0017] A method for preparing bromoundecanoic acid by tower bromine addition of undecylenic acid, using a reaction tower with a raw material upper inlet and a raw material lower inlet, the ceramic structured packing with a porosity of 60% is housed in the reaction tower, and the ten Undecylenic acid and toluene liquid are made into undecylenic acid toluene solution at a mass ratio of 1:4, and then sprayed into the tower from the top of the tower, and hydrogen bromide gas is continuously fed from the bottom of the tower at the same time. The two materials are ten The molar ratio of monoenoic acid to hydrogen bromide is 1:1.5. Under the condition of controlling the reaction temperature at 20-30°C, continuous reverse contact occurs to generate bromoundecanoic acid solution, which is then fed into bromoundecanoic acid solution from the bottom of the reaction tower. Acid and toluene separation process, that is, bromoundecanoic acid product.

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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 of a tower-typed addition production of 11-bromoundecanoic acid by an undecylenic acid, which belongs to the process flow and solves the problems of interval operations, enormous settings, large engineering investment and bad economical benefits in the addition technology for processing an undecylenic acid bromine in the prior art. The undecylenic acid and toluene liquid are mixed into undecylenic acid toluene liquid according to the quality proportion of 1:3-4, which is sprayed into the tower from the tower top; meanwhile, hydrobromic gas is sent from the tower bottom continuously; the mol proportion of the undecylenic acid and the bromide hydrogen is 1:1-1.5, and the 11-bromoundecanoic acid is produced in the condition that the reaction temperature is controlled between 20 to 30 DEG C by the continuous reverse touching. The engineering plastic process has the advantages of constant reaction temperature, small side effect, steady quality of products, continuous operability, large potential of engineering enlargement, relatively and evidently small volume of a device, good investment benefits, simple structure and easy processing and manufacturing.

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 preparing bromoundecanoic acid through tower addition of undecylenic acid 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 synth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C51/363C07C53/19
Inventor 赵学严
Owner 山西宏远科技股份有限公司
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