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Ionic liquid of solvated organic lithium borate, preparation method and application of ionic liquid, and lubricating oil

A technology of organic lithium borate and lithium borate salt, applied in the field of lubricating oil, can solve problems such as equipment corrosion

Active Publication Date: 2022-04-26
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The existing solvated ionic liquids have good oil solubility, but the anions in the existing solvated ionic liquids contain halogens, such as BF 4- 、PF 6- 、CF3COO - and CF3SO 3- etc.; due to the strong hydrophilicity of halogen, the halogen in the anion is easily hydrolyzed to produce acid, which will cause corrosion to the equipment

Method used

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  • Ionic liquid of solvated organic lithium borate, preparation method and application of ionic liquid, and lubricating oil
  • Ionic liquid of solvated organic lithium borate, preparation method and application of ionic liquid, and lubricating oil
  • Ionic liquid of solvated organic lithium borate, preparation method and application of ionic liquid, and lubricating oil

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[0039] The present invention also provides the preparation method of organic borate lithium salt described in above-mentioned technical scheme, comprises the following steps:

[0040] The organic borate lithium salt is obtained by mixing alkyl dicarboxylic acid, boric acid, lithium hydroxide and an organic solvent and performing condensation reaction.

[0041] In the present invention, the alkyl group in the alkyl dicarboxylic acid is a linear alkyl group with 2 to 8 carbon atoms, more preferably 2 or 3; the alkyl dicarboxylic acid may specifically include ethylene dicarboxylic acid acid or malonic acid, more preferably malonic acid.

[0042] In the present invention, the organic solvent preferably includes tetrahydrofuran, toluene or xylene, more preferably tetrahydrofuran or toluene, still more preferably toluene. In the present invention, the toluene is preferably anhydrous toluene.

[0043] In the present invention, the molar ratio of the alkyl dicarboxylic acid, boric a...

Embodiment 1

[0072] Dissolve 0.04 mol of acetic acid, 0.02 mol of boric acid and 0.02 mol of lithium hydroxide in anhydrous toluene, condense in an oil bath at 110°C (with reflux and stirring at a speed of 450r / min) for 12 hours, and air-cool the solution after the condensation reaction to Rotary evaporation at 25°C for 30min at 65°C to obtain a solid; wash the obtained solid with n-hexane and dry at 60°C for 12h to obtain white powder lithium bis(oxalate)borate.

[0073] Carry out nuclear magnetic resonance detection to the two (oxalic acid) lithium borate that prepares, obtain carbon spectrogram such as figure 1 shown. The detection result of the carbon spectrogram is 13 C NMR (101MHz, DMSO-d 6 ) δ158.61.

[0074] The prepared bis(oxalate) lithium borate is detected by nuclear magnetic resonance, and the boron spectrogram is obtained as figure 2 shown. The detection result of the boron spectrum is 11 B NMR (128MHz, DMSO-d 6 )δ7.37. 7 Li NMR (155MHz, DMSO-d 6 )δ-1.05.

[0075] ...

Embodiment 2

[0077] Lithium organoborate was prepared according to the method in Example 1, except that oxalic acid was replaced by malonic acid to prepare lithium bis(malonate)borate.

[0078] The prepared double (malonate) lithium borate is detected by nuclear magnetic resonance, and the hydrogen spectrum is obtained as image 3 shown. The detection result of the hydrogen spectrogram is 1 H NMR (400MHz, DMSO-d 6 )δ3.25(s,4H).

[0079] The prepared bis(malonate) lithium borate is detected by nuclear magnetic resonance, and the carbon spectrum is obtained as Figure 4 shown. The detection result of the carbon spectrogram is 13 C NMR (101MHz, DMSO-d 6 ) δ168.86, 42.40.

[0080] The prepared bis(malonate) lithium borate is detected by nuclear magnetic resonance, and the boron spectrogram is obtained as Figure 5 shown. The detection result of the boron spectrum is 11 B NMR (128MHz, DMSO-d 6 )δ3.43,-87.88. 7 Li NMR (155MHz, DMSO-d 6 )δ-1.05.

[0081] It can be known from the NMR...

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Abstract

The invention belongs to the technical field of lubricating oil additives, and particularly relates to ionic liquid of solvated organic lithium borate, a preparation method and application of the ionic liquid and lubricating oil. The organic lithium borate provided by the invention has a structural formula as shown in a formula 1, wherein n is an integer from 0 to 8. The lubricating oil provided by the invention comprises base oil, organic lithium borate and a coordination compound formed by the base oil and the organic lithium borate, the main chain of the base oil comprises nitrogen atoms or oxygen atoms; the organic lithium borate salt is the organic lithium borate salt in the technical scheme or the organic lithium borate salt prepared by the preparation method in the technical scheme. Lithium in the organic lithium borate salt provided by the invention can be coordinated with carbon or nitrogen on the main chain of the oil-based base oil in situ to form solvated ionic liquid, so that the organic lithium borate salt has good oil-phase solubility; and meanwhile, the formed solvated ionic liquid does not contain halogen, so that the corrosion effect in the use process is reduced.

Description

technical field [0001] The invention belongs to the technical field of lubricating oil additives, and in particular relates to an ionic liquid of a solvated organic borate lithium salt, a preparation method and application thereof, and a lubricating oil. Background technique [0002] Ionic liquids have excellent tribological properties, so ionic liquids have great potential value in the field of lubricating oil additives. However, traditional ionic liquids are not easily soluble in the oil phase and are mostly used in water-based lubricating oil additives. [0003] Solvated ionic liquids are prepared from equimolar oligoether mixtures (glymes) and lithium salts (LiX, where X is an anion containing halogen) to generate low melting point complexes, abbreviated as [Li(glyme) 1 ] X. Such as ethylene dimethyl ether-lithium salt molten complex including [Li(glyme)1] + Ions and their counter-anions together constitute a solvated ionic liquid; in which the low-ether organic ligan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F5/02C07F1/06C10M169/04C10M139/00C10N30/06C10N30/12C10N30/02C10N30/08
CPCC07F5/022C07F1/005C10M169/04C10M139/00C10N2030/06C10N2030/12C10N2030/02C10N2030/08C10M2227/06C10M2209/1045C10N2020/077Y02E60/10
Inventor 蔡美荣周峰危得全于强亮刘维民
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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