Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Process for producing 6-hydroxycaproic ester and process for producing trialkylamine

A technology of hydroxycaproate and trialkylamine, which is applied in the preparation of carboxylate, the preparation of amino compounds, chemical instruments and methods, etc., can solve the problems of high energy consumption and no other uses.

Inactive Publication Date: 2012-05-09
UBE IND LTD
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, ε-caprolactam obtained by depolymerization of nylon 6 has almost no other uses other than being used as a monomer of nylon 6.
From the viewpoint of chemical recycling, when reusing nylon 6 waste for various purposes, it needs to be decomposed into hydrogen, carbon monoxide, methane, etc., so there is a problem of consuming a lot of energy

Method used

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
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Next, examples of the method for producing methyl 6-hydroxyhexanoate of the present invention will be described. First, as Example 1, 0.3 g of nylon 6 (Nylon grain 1022B manufactured by Ube Industries, Ltd.) and 4 g of methanol (water content: 1600 ppm) were placed in a reaction tube made of SUS316 (stainless steel) with a volume of 10 mL, and the liquid in the reaction tube was replaced with argon. The air in the dead zone is then sealed. Put the sealed reaction tube in an electric furnace heated to 300°C for 1 hour (pressure 20.3 MPaG), then take the reaction tube out of the electric furnace and soak the reaction tube in water to cool it to the atmosphere temperature.

Embodiment 2

[0021] As Example 2, the manufacture of 6-hydroxyhexanoic acid methyl ester was performed similarly to Example 1 (pressure 20.3 MPaG) except having set reaction time to 2 hours.

Embodiment 3

[0023] As Example 3, the manufacture of 6-hydroxyhexanoic acid methyl ester was performed similarly to Example 1 (pressure 20.3 MPaG) except having set reaction time to 3 hours.

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
Login to View More

PUM

No PUM Login to View More

Abstract

A process for producing a 6-hydroxycarpoic ester and a process for producing a trialkylamine in both of which nylon-6, epsilon-caprolactam, which is a monomer therefor, etc. are used as a raw material. The processes are intended to make nylon-6 wastes reusable in various applications without consuming a large quantity of energy. The process for producing a 6-hydroxycarpoic ester and process for producing a trialkylamine are characterized by reacting amide compounds basically comprising epsilon-caprolactam with an alcohol in a supercritical state to obtain a 6-hydroxycaproic ester and a trialkylamine.

Description

technical field [0001] The present invention relates to a method for producing 6-hydroxyhexanoic acid ester which can be used as an intermediate material in organic synthesis, and a method for producing trialkylamine which can be used as an intermediate material for pharmaceuticals, surfactants, and chemical reagents in the field of the electronics industry, etc. . Background technique [0002] Nylon 6 is used in various applications such as films and engineering plastics. In recent years, recycling of nylon 6 has begun due to emphasis on waste reduction, effective use of resources, and environmental protection. [0003] As recycling of nylon 6, for example, Patent Document 1 describes the 2 ~500kg / cm 2 It is a method of depolymerizing ε-caprolactam oligomers into ε-caprolactam by contacting it with high-temperature and high-pressure water under certain conditions. [0004] Patent Document 1: Japanese Patent Laid-Open No. 2000-191638 [0005] However, ε-caprolactam obtai...

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
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C07C67/20C07C69/675C07C209/14C07C211/04
CPCC07C209/14C07C67/20Y02P20/54C07C69/675C07C211/04
Inventor 上村明男杉本常实海矶孝二
Owner UBE IND LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com