A method for preparing 11-aminoundecanoic acid from 10-undecenoic acid

A technology of undecanoic acid and enoic acid, which is applied in the field of preparing 11-aminoundecanoic acid from 10-undecenoic acid, can solve the problems such as non-crystallization, and achieves high quality, improved utilization rate, and improved reaction selectivity. Effect
CN103804209BActive Publication Date: 2016-01-27江苏东鼎化学科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
江苏东鼎化学科技有限公司
Publication Date
2016-01-27

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Abstract

The invention relates to a process for producing nylon 11 resin by utilizing castor oil, in particular to a method for preparing 11-aminoundecanoic acid by utilizing 10-undecenoic acid. The method comprises the following steps: proportioning 10-undecenoic acid, methylbenzene and benzene to prepare a raw material solution, and generating 11-bromoundecanoic acid by virtue of the additive reaction of the raw material solution with hydrogen bromide in a double-kettle reaction device in the presence of catalyst; ammonolyzing the 11-bromoundecanoic acid by virtue of three different processing ways without the crystallization; adding a phase-transfer catalyst in the ammonolysis reaction to accelerate the ammonolysis reaction; carrying out vacuum filtering after the ammonolysis reaction is completed, wherein a filter cake is a 11-aminoundecanoic acid crude product; adding the crude product into the deionized water, dissolving the crude product by heating the crude product, cooling and crystallizing the crude product, and filtering the crude product to obtain the refined 11-aminoundecanoic acid product.
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Description

technical field

[0001] The invention relates to a process for producing nylon 11 resin from castor oil, specifically a method for preparing 11-aminoundecanoic acid from 10-undecylenic acid in the process. Background technique

[0002] The chemical name of nylon 11 is polyundecylactam, the English name is Polyundecancylamide (abbreviated as PA11), and the chemical structure is H[NH(CH 2 ) 10 CO] n OH, a long carbon chain soft nylon synthesized from castor oil, is an important variety of polyamide engineering plastics. The production of nylon 11 mainly includes the production of 10-undecylenic acid, 11-aminoundecylic acid, monomer polymerization and resin modification.

[0003] 11-aminoundecanoic acid is used as a monomer for synthesizing nylon 11, and the synthesis route adopted at home and abroad is divided into two steps. The first step is the bromination reaction. The raw material 10-undecylenic acid is mixed with toluene first, and hydrogen bromide gas undergoes rever...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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