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Zinc-based imidazole type ion liquid for liquid sealing and preparation method thereof

An ionic liquid, zinc-based imidazole technology, applied in the field of zinc-based imidazole ionic liquids and their preparation, can solve the problems of low density, affect product quality, and are not suitable for high-density occasions, and achieve a wide range of applications and liquid ranges. wide effect

Pending Publication Date: 2017-03-08
LINZHOU KENENG MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 2. In the case of normal production or accidents and when the materials in the system are not exhausted and the system is shut down for inspection and fire, if air enters the system, it can form an explosive gas mixture with the materials, or if humid air enters the system, it will affect the product quality system equipment
[0013] The common problem of engine oil, white oil and silicone oil is that the density is low, so it is not suitable for some occasions that require high density

Method used

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  • Zinc-based imidazole type ion liquid for liquid sealing and preparation method thereof
  • Zinc-based imidazole type ion liquid for liquid sealing and preparation method thereof
  • Zinc-based imidazole type ion liquid for liquid sealing and preparation method thereof

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Embodiment 1

[0045] A zinc-based imidazole ionic liquid for liquid sealing, which is obtained by compounding an ionic liquid intermediate and a zinc salt;

[0046] The structural formula of the ionic liquid intermediate is shown in formula (1):

[0047] Formula 1)

[0048] Among them, R 1 One of C2~C8 alkyl, allyl, aminopropyl, R 2 One of the C1-C4 alkyl groups, R 3 for H or CH 3 The anion X is one of the anions of ethyl sulfate, diethyl phosphate, bromide, and chloride; the zinc salt is zinc acetate, zinc bromide, zinc phosphate, zinc sulfate, zinc chloride, zinc fluoroborate, and iodine One of zinc chloride; the density of the ionic liquid intermediate is 1.05-1.20 g / mL, and the density of the ionic liquid is greater than 1.2 g / mL.

[0049] As mentioned above, the zinc-based imidazole ionic liquid used for liquid sealing is prepared through the following steps:

[0050] (1) Preparation of intermediate: mix the raw material containing the target cation with the raw material conta...

Embodiment 2

[0062] The device requiring a liquid seal is a U-shaped glass tube. The material requirements for the liquid seal are: no reaction with glass, stable to water and air below 200°C, non-volatile, and a density of 1.5g / mL or more. Choose 1-ethyl-3-methylimidazole ethyl sulfate salt as an intermediate, choose zinc chloride as a compound salt, and the structural formula of the ionic liquid is:

[0063]

[0064] Its preparation method is:

[0065] (1) Take 82.1g of N-methylimidazole, add 169.6g of diethyl sulfate, stir and react at 50°C for 24 hours, wash with ethyl acetate, and rotary steam at 80°C to obtain 220g of 1-ethyl-3-methylimidazole Ethyl sulfate salt, a light yellow liquid;

[0066] (2) Add 660g of zinc chloride to it, stir and react at 120°C for 12 hours, vacuum rotary evaporate at 100°C, and vacuum dry at 100°C for 24 hours to obtain 850g of light yellow product, [BMIM][EtSO 4 ]·xZnCl 2 , yield 96.6%. After inspection, the ionic liquid has a purity of 97.0% and a...

Embodiment 3

[0068] The device requiring a liquid seal is a vacuum pump, which is made of stainless steel. The material requirements for the liquid seal are: it does not react with 304 stainless steel, and is stable to water, air, and stainless steel below 200 ° C. It is not volatile, and the density requirement is 1.5 g / mL above. Choose 1-aminopropyl-3-butylimidazolium bromide as the intermediate, choose zinc bromide as the complex salt, and the structural formula of the ionic liquid is:

[0069]

[0070] Its preparation method is:

[0071] (1) Take 124.1g of N-butylimidazole, add 262.7g of 3-bromopropylamine hydrobromide, stir and react at 120°C for 24 hours, dry in vacuum at 120°C for 24 hours, wash with ethyl acetate, and rotary evaporate at 80°C to obtain 280g of 1-Aminopropyl--3-butylimidazolium bromide, a light yellow solid;

[0072] (2) Add 560g of zinc bromide to it, stir and react at 200°C for 12 hours, vacuum rotary evaporate at 100°C, and vacuum dry at 100°C for 24 hours t...

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Abstract

The invention relates to zinc-based imidazole type ion liquid for liquid sealing. The proper intermediates and zinc salts can be selected according to the concrete density requirements or materials requirements of required liquid sealing; then, the proportion of the required intermediates and the zinc salts is calculated according to the concrete density, the intermediates and the zinc salt density of the required liquid sealing media; the preparation is performed to obtain ion liquid used for liquid sealing. The zinc-based imidazole type ion liquid has the following beneficial effects of non-volatile performance, non-combustibility, no combustion and explosion risk, high safety performance, wide liquid path range, applicability at 0 to 250 DEG C, physical and chemical stability and intermiscibility with various materials; through the design and the synthesis of novel ion liquid, the wider application range can be realized. The ion liquid density is higher than or equal to 1.2g / ml; the density is higher than that of ordinary media; the ion liquid can be applicable various special occasions; through the design synthesis, the ion liquid density can be changed; the density is adjustable in a 1.2 to 2.0 g / ml; homogeneous materials are used, and the particle suspension problem does not exist.

Description

technical field [0001] The invention belongs to the technical field of ionic liquids, and in particular relates to a zinc-based imidazole ionic liquid used for liquid sealing and a preparation method thereof. Background technique [0002] Ionic liquids are a class of environment-friendly substances with great application prospects that have emerged in recent years. They are molten salts composed of anions and cations that are liquid at room temperature or near room temperature. It has both the physical fluidity of liquids and the chemical reactions of salts. Compared with traditional organic solvents, it has many unique properties, such as designable structure, wide liquid range, close to zero vapor pressure, non-flammable, high thermal and chemical stability, and reusable etc. The above properties determine that ionic liquids have very high safety performance in a wide temperature range. [0003] Liquid seals are suitable for places with relatively high sealing requirement...

Claims

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Application Information

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IPC IPC(8): C07D233/58C07D233/61
CPCC07D233/58C07D233/61
Inventor 李凯明方文娟张军师王兵李海生李喜翠
Owner LINZHOU KENENG MATERIAL TECH