Process and apparatus for producing alkane hydramine

An alkanolamine, regeneration process technology, applied in the directions of organic chemistry methods, chemical instruments and methods, preparation of organic compounds, etc., can solve problems such as insufficient production of dialkanolamines, and achieve the effect of high yield

Inactive Publication Date: 2001-06-06
NIPPON SHOKUBAI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the purpose of these catalysts is to produce monoalkanolamines with high selectivity, and it is still insufficient for the production of dialkanolamines whose demand has increased in recent years

Method used

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  • Process and apparatus for producing alkane hydramine
  • Process and apparatus for producing alkane hydramine
  • Process and apparatus for producing alkane hydramine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0120] The present invention will be described in detail through the following examples, which should not be considered as a limitation to the present invention.

[0121] The invention is illustrated by the production of ethanolamine primarily using ethylene oxide as the alkylene oxide.

Embodiment 1-1

[0125] This example refers to a case where the regeneration process and the reaction process are repeatedly performed by using a single reactor. use Figure 4 The apparatus shown in was used to carry out the reaction. A stainless steel pipe having an inner diameter of 15 mm and a length of 400 mm, on which a heater for compensating heat radiation was wound and having a thermal insulation layer was used as the reactor 401 . Inside the reactor, there is installed a protective tube into which a thermocouple for measuring the temperature profile of the fixed catalytic layer can be inserted. Charge the catalyst A of 50ml in the reactor, and with 5 hours -1 (LHSV) The raw material (ammonia / ethylene oxide molar ratio: 14 / 1) heated to 60° C. by the preheater 402 was added thereto to carry out the reaction.

[0126] Although the temperature was increased to 150°C by the heat of reaction initially over a length of about 100 mm from the inlet, the temperature rose only to nearly 150°C...

Embodiment 1-2

[0130] This example is the case of using a single reactor in which the regeneration process and the reaction process are repeated. use Figure 4 The apparatus shown in was used to carry out the reaction. A stainless steel pipe having an inner diameter of 15 mm and a length of 400 mm, on which a heater for compensating for heat radiation was wound and having a thermal insulation layer was used as the reactor 401 . Inside the reactor, there is installed a protective tube into which a thermocouple for measuring the temperature profile of the fixed catalytic layer can be inserted. Charge the catalyst A of 50ml in the reactor, and with 5 hours -1 (LHSV) The raw material (ammonia / ethylene oxide molar ratio: 14 / 1) heated to 60° C. by the preheater 402 was added thereto to carry out the reaction.

[0131]Although the temperature was increased to 150°C initially by the heat of reaction over a length of about 100 mm from the inlet, the temperature rose only to nearly 150°C after 500 ...

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PUM

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Abstract

In producing alkanolamines by use of a microporous material as a catalyst, the difficulty in industrially performing the production because of the short lifetime of the catalyst is resolved. A process of regenerating the catalyst by removing an organic substance deposited on the catalyst by means of decomposing and/or extracting the substance is introduced, and thereby steady production is carried out substantially over the long term by switching the reaction and the regenerating processes.

Description

Background of the invention [0001] The present invention relates to a method for producing alkanolamine through the reaction of ammonia and alkylene oxide using a microporous material as a catalyst, and a production device thereof. In particular, the present invention relates to a method and apparatus for the selective production of dialkanolamines. More particularly, it relates to a method for producing alkanolamines by combining a method of regenerating a deactivated catalyst with a method of reacting ammonia with alkylene oxide and a production device thereof. [0002] Description of related prior art: [0003] A method of producing ethanolamine by reacting ethylene oxide with aqueous ammonia (ammonia concentration: 20-40 wt%) is industrially adopted as a method of producing alkanolamine by amination of alkylene oxide with ammonia. In the process, three types of alkanolamines such as monoethanolamine, diethanolamine, and triethanolamine are produced. However, because of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/90B01J38/02C07B61/00C07C213/04C07C215/08C07C215/12
CPCC07C213/04Y02P20/584
Inventor 常木英昭桐敷贤有田佳生桥本元秀奥智治进藤久和浦野好明森下史朗
Owner NIPPON SHOKUBAI CO LTD
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