Process for production of pentamethylenediamine, and process for production of polyamide resin

A kind of technology of pentamethylene diamine and pentamethylene diamine crude product, which is applied in the manufacturing field of pentamethylene diamine

Active Publication Date: 2011-05-11
MITSUBISHI RAYON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition to the case of recycling, when discarding plastics, waste such as bu

Method used

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  • Process for production of pentamethylenediamine, and process for production of polyamide resin
  • Process for production of pentamethylenediamine, and process for production of polyamide resin
  • Process for production of pentamethylenediamine, and process for production of polyamide resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0244]

[0245] (Thermal decomposition process)

[0246] Add 5600 g of the above pentamethylene diamine carbonate aqueous solution (ii) (total pentamethylene diamine concentration 18.7% by weight) into the flask at an internal temperature of 102°C (oil bath temperature of 139°C) and normal pressure conditions When the water is recovered, it begins to decompose into crude pentamethylene diamine and carbon dioxide. After the decomposition started, the temperature was gradually increased while maintaining the normal pressure, and the decomposition was terminated when the final internal temperature reached 180°C (oil bath temperature 191°C) to obtain crude pentamethylene diamine. It should be noted that the maximum temperature of the thermal decomposition step is 180°C. The total pentamethylene diamine concentration, pentamethylene diamine concentration and pentamethylene diamine carbonate concentration in the obtained crude pentamethylene diamine were determined based on the above-...

Embodiment 2

[0262] (Thermal decomposition process and distillation process)

[0263] In the thermal decomposition step, while blowing nitrogen into the gas phase, the decomposition of the pentamethylene diamine carbonate aqueous solution (ii) was carried out, except that the same operations as in Example 1 were performed to obtain purified pentamethylene diamine 959 g (purity: 99.4% by weight). The yield was 91.0%. In addition, the maximum temperature of the internal temperature in the thermal decomposition step is 180°C. The total pentamethylene diamine concentration, pentamethylene diamine concentration and pentamethylene diamine carbonate concentration in the obtained crude pentamethylene diamine were determined based on the above-mentioned measurement method, and the concentrations were respectively 96.8 Weight%, 96.8% by weight, 0.0% by weight. According to the measurement result, in the crude pentamethylene diamine, the concentration of pentamethylene diamine relative to pentamethyl...

Embodiment 3

[0267] (Thermal decomposition process)

[0268] Add 5600 g of the above pentamethylene diamine carbonate aqueous solution (ii) (total pentamethylene diamine concentration 18.7% by weight) into the flask, at an internal temperature of 102°C (oil bath temperature of 137°C), and under normal pressure After heating and refluxing, it is decomposed into crude pentamethylene diamine and carbon dioxide. The total pentamethylene diamine concentration, pentamethylene diamine concentration and pentamethylene diamine carbonate concentration in the above crude pentamethylene diamine were determined based on the above-mentioned measurement method, and the concentrations were 21.1% by weight respectively , 14.9% by weight, 10.0% by weight. According to this measurement result, in the crude pentamethylene diamine, the concentration of pentamethylene diamine relative to pentamethylene diamine and pentamethylene diamine carbonate is 70.5 mol%.

[0269] Next, the temperature was slowly raised while...

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Abstract

Disclosed are: a process for producing purified pentamethylenediamine by simple production steps and in high yield; and others. The process for producing purified pentamethylenediamine comprises: a thermal decomposition step of heating pentamethylenediamine carbonate to yield crude pentamethylenediamine and carbon dioxide; and a distillation step of distilling the crude pentamethylenediamine produced in the thermal decomposition step to yield pentamethylenediamine, wherein the concentration of pentamethylenediamine in the crude pentamethylenediamine is 30 mol% or more relative to the total concentration of pentamethylenediamine and pentamethylenediamine carbonate.

Description

Technical field [0001] The present invention relates to a method for producing pentamethylene diamine and the like. More specifically, it relates to a method for producing pentamethylene diamine including decomposing pentamethylene diamine carbonate. Background technique [0002] As plastic raw materials, so-called fossil raw materials are often used. Except in the case of recycling, when plastics are discarded, carbon dioxide emissions are caused by waste such as combustion, which has become a problem in recent years. Therefore, for the prevention of global warming and the formation of a recycling-oriented society, people are looking forward to replacing plastic manufacturing raw materials with raw materials derived from biomass. Such demand covers many aspects such as injection molded products, fibers, monofilaments, etc., such as films, automotive parts, electrical and electronic parts, and mechanical parts. [0003] In this context, 56 nylon and 56 / 66 nylon using pentamethyle...

Claims

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Application Information

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IPC IPC(8): C07C209/84C07C211/09C08G69/28C12P13/00
CPCC08G69/26C07C209/68C07C209/84C08G69/28
Inventor 人见达也草野一直横木正志山本正规浦嶋英俊宫奥康平
Owner MITSUBISHI RAYON CO LTD
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