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New Applications of Magnetic Ionic Liquids

A magnetic ionic liquid, anion and cation technology, applied in the direction of heat exchange materials, preparation of organic compounds, preparation of halogenated hydrocarbons, etc., can solve the problems of low power conversion efficiency, low energy conversion efficiency, poor heat transfer effect, etc., to achieve Fast heat generation rate, good thermal stable phase, and less heat loss

Active Publication Date: 2019-01-04
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The heating plate is mainly composed of a heating tube. The outer surface of the heating tube is provided with an insulating layer. There is a resistance wire inside the metal tube. The two ends of the resistance wire are connected with electrode terminals. The gap between the metal tube and the resistance wire is filled with magnesium oxide to form a heat conduction Due to the small size of the heating wire and being buried in the magnesium oxide powder with poor thermal conductivity, the heat generated by the resistance wire is accumulated on the resistance wire and is difficult to dissipate, resulting in low power conversion efficiency; Loss of energy consumption occurs, making this heating very inefficient
[0004] These traditional heating methods generally have problems such as low energy conversion efficiency, poor heat transfer effect, slow heating speed, and uneven heating, which have a great adverse effect on the chemical reaction process in the reaction system and easily cause some side reactions. Affect product purity, etc.

Method used

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  • New Applications of Magnetic Ionic Liquids
  • New Applications of Magnetic Ionic Liquids

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Example 1: Synthesis of poly-3,4-ethylenedioxythiophene nanospheres by heating using magnetic ionic liquid electric heat generation

[0023] (1) Preparation of magnetic ionic liquid, reference "Discovery of a magnetic ionic liquid[bmim]FeCl 4 》The method in preparation 1-butyl-3-methyl iron tetrachloride salt ([bmim]FeCl 4 )stand-by;

[0024] (2) Weigh the magnetic ionic liquid [bmim]FeCl according to the volume ratio of 2:1 4 and 3,4-ethylenedioxythiophene mixed in figure 1 In the shown reaction device, the voltage is set to 30V, and the reaction temperature is set to 45°C. At this time, an electric field is formed between the electrode plates 3, and the anions and cations of the magnetic ionic liquid move, migrate, and collide with each other under the action of the electric field force, and the electric energy is converted into heat energy. , to rapidly heat up and provide heat for the polymerization reaction. When the temperature detector 5 detects that the temp...

Embodiment 2

[0028] Example 2: Thermally cracking cellulose by using magnetic ionic liquid to generate heat

[0029] (1) Preparation of magnetic ionic liquid, refer to "Synthesis and characterization of theiron-containing magnetic ionic liquids" to prepare magnetic ionic liquid N-butylpyridine tetrachloride ([bPy]FeCl 4 ) and N-butylpyridine tetrachloride ([bmP]FeCl 4 )stand-by;

[0030] (2) Weigh the magnetic ionic liquid [bPy]FeCl according to the mass ratio of 5:5:1 4 , [bmP]FeCl 4 Mix with cellulose powder in the reaction device, respectively set DC voltage 80V, reaction temperature 140°C; AC voltage 150V, temperature 240°C; AC voltage 220V, temperature 340°C for vitreous pyrolysis reaction for 2 hours, the reaction is completed Then turn off the power supply; the distribution of the main pyrolysis products of cellulose is shown in Table 2.

[0031] Table 2 Distribution of cellulose pyrolysis products at different temperatures

[0032]

[0033] It can be seen from Table 2 that th...

Embodiment 3

[0034] Example 3: Using magnetic ionic liquid to generate heat for heating and catalytic dehalogenation reaction

[0035] (1) Preparation of magnetic ionic liquid, reference "1-Butyl-3-methylimidazolium cobalttetracarbonyl [bmim][Co(CO) 4 ]: a catalytically active organometallic ionicliquid" method to prepare 1-butyl-3-methyl tetracarbonyl cobalt salt ([bmim][Co(CO) 4 ])stand-by;

[0036] (2) Weigh the magnetic ionic liquid [bmim][Co(CO) at a mass ratio of 10:5:1 4 ], NaOH and 2-naphthyl bromomethyl ketone were mixed in the reaction device, set the DC voltage to 55V, and the temperature to 85°C, and heated the catalytic reaction for 1h, and turned off the power after the reaction was completed. The method can heat and catalyze 2-naphthyl bromomethyl ketone to remove bromine and convert it into 2-naphthylethanone (as shown in formula 1), and the conversion rate can reach 100%.

[0037] Formula 1 .

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Abstract

The invention discloses novel application of magnetic ionic liquid, namely application of the magnetic ionic liquid as a heating media; Controllable voltage is applied to generate an electric field so as to enable anion and cation of the magnetic ionic liquid to produce movement transfer and violent collision, current is formed inside, heat is produced accordingly, electric energy is converted into heat energy, the own temperature of the liquid is raised rapidly, the heat is transferred to a reaction system and taken as excellent heat generation, heat transfer and heat storage media for supplying heat to the reaction system, the inside of the reaction system is directly in contact with reaction substances for direct heating, and at the same time, certain reaction systems have excellent metal catalytic effects; according to the application, rapid heating and uniform heating of the reaction systems can be rapidly realized, the novel application is a heating method which is efficient, stable, safe, green and environment-friendly and easy and convenient to operate and is an innovation on the heating manner of the reaction systems, and the novel application can be applied to a plurality of reaction systems requiring heating.

Description

technical field [0001] The invention relates to a new application of a magnetic ionic liquid, specifically using the electric heat generated by the magnetic ionic liquid as a heating medium, and belongs to the technical field of reaction heating and development and utilization of new materials. Background technique [0002] Most of the existing chemical reaction system heating methods use electric heating devices to indirectly heat the reaction system, such as metal tube heating devices, which heat a certain liquid medium (water or silicone oil, etc.) to transfer heat to the reaction vessel and act on it. reaction system. The heating metal tube is mostly in direct contact with the liquid medium. During the heating process, the heat exchange area between the heating tube, the heating wall and the liquid is small, the heating speed is slow, and the energy conversion efficiency is low. In addition, in the process of indirectly transferring heat to the reaction system , It is e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K5/10B01J19/00B01J31/02C08G61/12C07C45/54C07C49/788C07C17/263C07C25/13
CPCB01J19/0013B01J31/0284B01J31/0288B01J2219/00132C07C17/2632C07C45/54C08G61/123C08G2261/11C08G2261/334C09K5/10C07C49/788C07C25/13
Inventor 瞿广飞何巍伟宁平
Owner KUNMING UNIV OF SCI & TECH
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