Unlock instant, AI-driven research and patent intelligence for your innovation.

Ionic liquid

A technology of ionic liquid and carbon number, which is applied in the direction of silicon organic compounds, compounds of group 4/14 elements of the periodic table, chemical instruments and methods, etc., can solve the problems that ionic liquids are not yet known, and achieve easy separation and small environmental load , the effect of good heat resistance

Active Publication Date: 2014-03-12
NISSHINBO IND INC
View PDF9 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] As a result, ionic liquids that are halogen-free, excellent in heat resistance, and hydrophobic have not been known so far

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Ionic liquid
  • Ionic liquid
  • Ionic liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] [Example 1] Synthesis of compound (1)

[0068]

[0069] 1.00 g of a sodium salt of 3-(trimethylsilyl)-1-propanesulfonic acid (manufactured by Sigma-Aldrich) was dissolved in 120 ml of ion-exchanged water. A solution obtained by dissolving 2.03 g of tributyldodecylphosphonium bromide (manufactured by Tokyo Chemical Industry Co., Ltd.) in 80 ml of ion-exchanged water was added to this solution, and stirred overnight at room temperature. At this time, the reaction solution was initially white and turbid, but separated into two layers after overnight reaction. 50 ml of ethyl acetate (manufactured by Wako Pure Chemical Industries, Ltd.) was added to the reaction liquid, and the organic layer was extracted. This operation was further repeated twice, and the combined organic layers were washed twice with 50 ml of ion-exchanged water. About 20 g of potassium carbonate (manufactured by Wako Pure Chemical Industries, Ltd.) was added to the organic layer, and after drying and...

Embodiment 2

[0072] [Example 2] Synthesis of compound (2)

[0073]

[0074] Except that 2.03g of tributyldodecylphosphonium bromide was changed to 2.28g of tributylhexadecylphosphonium bromide (manufactured by Tokyo Chemical Industry Co., Ltd.), 2.12 g Compound (2) as a colorless transparent liquid (yield 77%). Compound (2) 1 H-NMR spectrum is shown in image 3 .

[0075] In addition, this compound has a melting point of -41°C. Such as Figure 4 Shown, the decomposition temperature is 322°C (10%).

[0076] Furthermore, when this compound (2) was mixed with an equal volume of water, it was completely separated into two layers, and it was confirmed that it was hydrophobic.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
glass transition temperatureaaaaaaaaaa
melting pointaaaaaaaaaa
Login to View More

Abstract

An ionic liquid characterized by comprising a phosphonium salt represented by formula (1), which has such characteristic properties that no halogen atom is contained, thermal stability is excellent and hydrophobicity is exerted. (In the formula, R1 represents an alkyl group having 1 to 10 carbon atoms; R2 represents an alkyl group having 8 to 20 carbon atoms; R3 represents an alkyl group having 1 to 8 carbon atoms; and n represents an integer of 1 to 12; wherein the number of carbon atoms in R2 is greater than that in R1.)

Description

technical field [0001] The present invention relates to ionic liquids. More specifically, the present invention relates to ionic liquids composed of tetraalkylphosphonium cations and trialkylsilyl-containing alkylsulfonate anions. Background technique [0002] Since the anions of most conventionally known ionic liquids contain halogen atoms such as fluorine atoms, there is a problem not only in terms of environmental load but also in high production costs. These problems are expected to be improved. [0003] In view of this point, halogen-atom-free type ionic liquids have been developed (for example, see Patent Documents 1 and 2). However, these ionic liquids have problems such as high viscosity and low heat resistance (low decomposition temperature) compared with ionic liquids containing fluorine atoms. [0004] In addition, generally, there are many ionic liquids showing hydrophilicity. This hydrophilicity often becomes a problem when it is required to lower the water ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C07F9/54C07F7/08
CPCC07F9/5407C07F7/081Y02E60/10
Inventor 增田现
Owner NISSHINBO IND INC