Furan skeleton-containing imine guanidine derivatives and preparation and application thereof

A technology of guanidine furobisimide tetrahydrate and guanidine furobisimine, which is applied in the field of iminoguanidine derivatives and their preparation and application, and can solve the problems of high energy consumption for absorbent regeneration, strong corrosion of equipment, and easy degradation. problems, and achieve the effects of low cost, high yield and simple preparation method

Active Publication Date: 2018-05-08
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among such techniques, CO 2 The chemical absorption method is an important and effective CO 2 Capture method, typical chemical absorbents are alkanolamine and hot potash solution, etc., it uses CO 2 Due to the nature of acidic gas, it is absorbed by alkaline substances, and then heated to desorb, so as to achieve concentrated enrichment of CO 2 However, the disadvantage of this method is that the regeneration energy of the absorbent is large, it is easy to degrade, easy to volatilize, and it is highly corrosive to the equipment, etc.

Method used

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  • Furan skeleton-containing imine guanidine derivatives and preparation and application thereof
  • Furan skeleton-containing imine guanidine derivatives and preparation and application thereof
  • Furan skeleton-containing imine guanidine derivatives and preparation and application thereof

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Effect test

Embodiment 1

[0048] Embodiment 1: Preparation of 2,5-furanobisiminoguanidine

[0049] Add 2,5-furandicarbaldehyde (12.4g, 0.1mol), aminoguanidine hydrochloride (22g, 0.2mol), and ethanol (100ml) into the reaction flask, stir, heat to 70°C, and react for 12 hours. After the reaction was completed, the reaction solution was left to stand at 4°C for 12 hours, filtered with suction, and the filter cake was washed three times with ethanol, collected and dried to obtain 34.7 g of a light yellow solid, which was 2,5-furanobisiminoguanidine hydrochloride Salt hydrate, the chemical formula is FuBIG·2HCl·2.5H 2 O, yield 98.0%; mp.184-190°C; elemental analysis, theoretical value: C: 27.13%; H: 5.41%; N: 31.64%; measured value: C: 26.62%; H: 5.08%; N: 31.74%. Put it into a reaction bottle, add 100ml of 2M sodium hydroxide aqueous solution, stir at room temperature for 0.5 hours, stand at 4°C for 12 hours, filter with suction, and dry to obtain 22.66g of guanidine 2,5-furanobisimino, yield : 96%, me...

Embodiment 2

[0050] Embodiment 2: Preparation of 2,5-furanobisiminoguanidine

[0051] Add 2,5-furandicarbaldehyde (12.4g, 0.1mol), aminoguanidine hydrochloride (22g, 0.2mol), and tetrahydrofuran (100ml) into the reaction flask, stir, heat to 66°C, and react for 12 hours. After the reaction was completed, the reaction solution was left to stand at 4°C for 12 hours, filtered with suction, and the filter cake was washed three times with THF, the filter cake was collected, and dried to obtain a light yellow solid, which was 2,5-furanobisiminoguanidine hydrochloride . Put it into a reaction flask, add 100ml of 2M sodium hydroxide aqueous solution, stir at room temperature for 0.5 hours, let stand at 4°C for 12 hours, filter with suction, and dry to obtain 21.72g of 2,5-furanobisiminoguanidine, yield 92%, melting point: 244-246°C.

Embodiment 3

[0052] Embodiment 3: Preparation of 2,5-furanobisiminoguanidine

[0053] Add 2,5-furandicarbaldehyde (12.4g, 0.1mol), aminoguanidine hydrochloride (22g, 0.2mol), and methanol (100ml) into the reaction flask, stir, heat to 65°C, and react for 12 hours. After the reaction is completed, The reaction solution was left to stand at 4°C for 6 hours, filtered with suction, and the filter cake was washed three times with methanol, collected and dried to obtain a light yellow solid, which was 2,5-furanobisiminoguanidine hydrochloride. Put it into a reaction bottle, add 100ml of 2M sodium hydroxide aqueous solution, stir at room temperature for 0.5 hours, stand at 0°C for 10 hours, filter with suction, and dry to obtain 21.24g of 2,5-furanobisiminoguanidine, yield 90%, melting point: 244-246°C.

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Abstract

The invention discloses furan skeleton-containing imine guanidine derivatives. The furan skeleton-containing imine guanidine derivatives include 2,5-furyldiimine guanidine, acceptable salts of 2,5-furyldiimine guanidine and solvate of the acceptable salts, and the invention also discloses a preparation method of 2,5-furyldiimine guanidine and application of 2,5-furyldiimine guanidine as acid-gas absorbent and anionic precipitant. 2,5-furyldiimine guanidine can be regenerated and recycled conveniently after absorption of acid gas, and energy consumption of regeneration is low, so that the costis reduced, and the efficiency is improved; the preparation method of 2,5-furyldiimine guanidine is simple, and has mild conditions, short reaction time, high yield and low cost, and large-scale preparation is easy to achieve.

Description

technical field [0001] The invention relates to the fields of chemical industry and environmental protection, in particular to an iminoguanidine derivative containing a furan skeleton and its preparation and application. Background technique [0002] With the development of economy and society, the greenhouse effect and air pollution caused by the use of fossil raw materials have seriously threatened the environment on which human beings live. Global warming, greenhouse effect and environmental pollution are common challenges for the sustainable development of all countries. Studies have shown that the content of carbon dioxide in the atmosphere has been increasing due to human activities, and the concentration of carbon dioxide has risen from 280ppm before the industrial revolution to more than 400ppm at present. The frequency and intensity of natural disasters have increased. This global climate change has seriously threatened the survival and development of human society...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D307/52B01D53/14
CPCB01D53/1475B01D53/1493B01D2252/2053C07B2200/13C07D307/52B01D53/1481B01D2252/20436B01D2257/304B01D2257/404B01D2258/06Y02P20/151Y02C20/40B01D2253/20
Inventor 邹永刘洁罗翔盛剑飞宋现恒位文涛李建恒
Owner SUN YAT SEN UNIV
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