Lignin quaternary ammonium salt cation asphalt emulsifier and preparation method thereof

A technology of asphalt emulsifier and lignin, which is applied in the direction of building components, building insulation materials, buildings, etc., can solve the problems of high cost, cumbersome preparation steps, high temperature reaction, etc., and achieve excellent performance, good storage stability, emulsification Fine and uniform asphalt

Inactive Publication Date: 2018-08-31
苏州太星新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the preparation steps are cumbersome, the cost is high, and high temperature reaction is required

Method used

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  • Lignin quaternary ammonium salt cation asphalt emulsifier and preparation method thereof
  • Lignin quaternary ammonium salt cation asphalt emulsifier and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Preparation of Example 1 Lignin Quaternary Ammonium Salt Cationic Asphalt Emulsifier

[0030] Follow the steps below:

[0031] (1) Add 1 mol of p-hydroxybenzaldehyde into the reaction flask, sequentially add 1 mol of thionyl chloride and 2 mol of triethylamine, react at room temperature for 2-3 hours, add 1 mol of lignin, stir and react at room temperature for 2 hours, and obtain intermediate I;

[0032] (2) Dissolve intermediate I in glacial acetic acid, add 1 mol of 30% hydrobromic acid dropwise, react at 40-45°C for 2 hours, continue to add 1 mol of 3-amino-1-propanol, react at room temperature for 3 hours, intermediate II;

[0033] (3) Dissolve the intermediate II in dichloromethane, slowly add 1 mol of sodium chloroacetate dropwise at 0°C, and react for 2 hours to obtain a lignin-based cationic asphalt emulsifier with a yield of 67%.

[0034] The prepared lignin-based quaternary ammonium salt cationic asphalt emulsifier was separated and purified for FTIR detectio...

Embodiment 2

[0037] The preparation of embodiment 2 lignin quaternary ammonium salt cationic asphalt emulsifier

[0038] Follow the steps below:

[0039] (1) Add 1 mol of p-hydroxybenzaldehyde into the reaction flask, add 2 mol of thionyl chloride and 8 mol of triethylamine in turn, react at room temperature for 2-3 hours, add 1.5 mol of lignin, stir and react at room temperature for 2 hours, and obtain intermediate I;

[0040] (2) Dissolve intermediate I in glacial acetic acid, add 2 mol of 30% hydrobromic acid dropwise, react at 40-45°C for 2 hours, continue to add 3 mol of 3-amino-1-propanol, react at room temperature for 3 hours, intermediate II;

[0041] (3) Dissolve the intermediate II in dichloromethane, slowly add 3 mol of sodium chloroacetate dropwise at 0°C, and react for 2 hours to obtain a lignin-based cationic asphalt emulsifier with a yield of 70%.

[0042] The prepared lignin-based quaternary ammonium salt cationic asphalt emulsifier was separated and purified for FTIR dete...

Embodiment 3

[0043] Preparation of Example 3 Lignin Quaternary Ammonium Salt Cationic Asphalt Emulsifier

[0044] Follow the steps below:

[0045] (1) Add 1 mol of p-hydroxybenzaldehyde into the reaction flask, add 1.5 mol of thionyl chloride and 5 mol of triethylamine in turn, react at room temperature for 2-3 hours, add 1.3 mol of lignin, stir and react at room temperature for 2 hours, and obtain intermediate I;

[0046](2) Dissolve intermediate I in glacial acetic acid, add 1.5mol 30% hydrobromic acid dropwise, react at 40-45°C for 2h, continue to add 2mol 3-amino-1-propanol, react at room temperature for 3h, intermediate II;

[0047] (3) Dissolve the intermediate II in dichloromethane, slowly add 2 mol of sodium chloroacetate dropwise at 0°C, and react for 2 hours to obtain a lignin-based cationic asphalt emulsifier with a yield of 82%.

[0048] The prepared lignin-based quaternary ammonium salt cationic asphalt emulsifier was separated and purified for FTIR detection, and the results...

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Abstract

The invention discloses a lignin quaternary ammonium salt cation asphalt emulsifier and a preparation method thereof. According to the preparation method of the lignin quaternary ammonium salt cationasphalt emulsifier, the molecular structural formula of the emulsifier is as shown in the specification, and in the formula, lignin represents a lignin molecular chain. The asphalt emulsifier is widein raw material source, low in production cost, simple in preparation process, excellent in property, fine and uniform in texture and good in stability, has the characteristics of rapid cracking and medium cracking asphalt emulsifiers, and has wide application prospects.

Description

technical field [0001] The invention belongs to the field of fine chemicals, and in particular relates to a lignin-based quaternary ammonium salt cationic asphalt emulsifier. Background technique [0002] With the continuous development of asphalt application level, the disadvantages of ordinary hot asphalt are also beginning to appear: the asphalt condenses too fast and needs to be heated repeatedly during use, which causes great energy waste and environmental pollution during use. Heat the cold asphalt to a melted viscous state, in the aqueous solution containing an appropriate amount of emulsifier, after stirring, the asphalt can be dispersed in the solution in a fine particle state to form an (O / W) emulsion, which is emulsified asphalt . This asphalt emulsion exists in liquid form at room temperature, and it is dark brown or black, and has good fluidity at high temperatures. The most critical factor affecting the road performance of emulsified asphalt is the asphalt em...

Claims

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Application Information

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IPC IPC(8): C08H7/00C08J3/03C08L95/00
CPCC08H6/00C08J3/03C08J2395/00
Inventor 邱暾哲徐自强周健
Owner 苏州太星新材料科技有限公司
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