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Emulsified bitumen and preparation method thereof

A technology for emulsified asphalt and emulsifier, which is used in building components, building insulation materials, buildings, etc., can solve the problem of high cost of emulsifier, and achieve the effects of low cost, good emulsification effect and environmental protection.

Active Publication Date: 2013-07-10
程贤甦
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The emulsifiers used to prepare cationic asphalt emulsions are commonly used amine salt emulsifiers (such as tallow propylene diamine, coconut oil propylene diamine, alkylpropylene diamine) or long-chain alkyl quaternary ammonium salts (such as molecules with twelve carbon to eicosyl trimethylammonium chloride) emulsifiers, the cost of these emulsifiers is relatively high, and many raw materials rely on petrochemical industry products

Method used

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  • Emulsified bitumen and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Example 1. Preparation of lignin cyanamide and amine derivative emulsified pitch from high boiling alcohol lignin

[0026] Weigh 15g of high-boiling alcohol lignin and 2g of melamine into a three-necked flask with stirring, add 90ml of 1% sodium hydroxide solution to dissolve it, add 15ml of formaldehyde with a content of 37%, and heat up to 80°C, stir , react for 1.0 h; then use 2.5mol / L NaOH solution to adjust the pH to about 10, add 20g of diethylenetriamine, maintain 80°C, constant temperature, slowly add 20ml of formaldehyde solution with a content of 37%, stir and reflux for 2.0 h; after the reaction is completed, pour out while hot to obtain a solution of derivatives of lignin cyanamide and amine. Prepare lignin cyanamide and amine derivative emulsifier solution according to the requirement of concentration of 1.1% by weight, and then adjust the pH of the solution to about 2.0 with concentrated hydrochloric acid. Then put 80ml of the prepared emulsifier soluti...

Embodiment 2

[0027] Example 2. Preparation of lignin cyanamide and amine derivative emulsified asphalt by enzymatic hydrolysis of lignin

[0028]Weigh 20g of enzymatic lignin, 1g of melamine into a three-necked flask with stirring, add 80ml of sodium hydroxide with a percentage concentration of 1% to dissolve it, add 20ml of formaldehyde with a content of 37%, and heat up to 75°C, stir, React for 1.5 h; then use 2.5 mol / L NaOH solution to adjust the pH to about 10, add 30 g of diethylene triamine, maintain 75 ° C, constant temperature, slowly add 20 ml of 37% formaldehyde solution dropwise, stir and reflux for 1.5 h; after the reaction is completed, pour out while hot to obtain a solution of derivatives of lignin cyanamide and amine. Prepare lignin cyanamide and amine derivative emulsifier solution according to the requirement of concentration of 1.2% by weight, and then adjust the pH of the solution to about 2.5 with concentrated hydrochloric acid. Then put 80ml of the prepared emulsi...

Embodiment 3

[0029] Example 3. Preparation of lignin cyanamide and amine derivative emulsified pitch from high boiling alcohol lignin

[0030] Weigh 15g of high-boiling alcohol lignin, add 3g of dicyandiamide to a stirred three-necked flask, add 20 ml of ammonia with a percentage concentration of 25% to dissolve it, add 15 ml of formaldehyde with a content of 37% and 20 ml of deionized water, Raise the temperature to 80°C, stir, and react for 1.0 h; then adjust the pH to about 10 with 2.5mol / L NaOH solution, add 20g of trienetetramine, maintain 80°C, keep the temperature constant, and slowly add 25 ml of 37% The formaldehyde solution was stirred and refluxed for 2.5 hours; after the reaction was completed, it was poured out while hot to obtain a solution of lignin cyanamide and amine derivatives. 0。 According to the requirements of the weight percent concentration of 1.1% deployment lignin cyanamide and amine derivative emulsifier solution, and then adjust the pH of the solution to 3.0 ...

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Abstract

The invention discloses an emulsified bitumen and a preparation method thereof. Solvent-type lignin, aldehyde, cyanamide and amine carry out condensation reaction to prepare cyanamide and amine derivative of solvent-type lignin; and the cyanamide and amine derivative of solvent-type lignin are used as emulsifier and treated with emulsification to prepare emulsified bitumen. The method has low cost; and the prepared emulsified bitumen has excellent performance and can be used in road paving or as building material, so as to fully utilize reproducible resource, reduce consumption of petroleum chemicals and gain substantial economic and social benefits.

Description

technical field [0001] The invention belongs to the field of new material development and preparation, and more specifically relates to an emulsified asphalt and a preparation method thereof. Background technique [0002] Asphalt is a commonly used road material, and it is also a necessary raw material for waterproofing of buildings, antiseptic treatment of wood, and preparation of moisture-proof linoleum. Since asphalt is solid or semi-solid at room temperature and has no fluidity without heating, it must be pretreated before use to make it into asphalt liquid. It is usually processed by heating and melting, solvent dissolution and emulsification. Emulsifying asphalt by heating consumes a lot of heat energy. On average, melting one ton of asphalt consumes 435 kilograms of standard coal. Moreover, during the melting process, asphalt will release toxic and harmful odors to the human body, which is very harmful to the health of workers; and Solvent treatment consumes a lot o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08J3/03C08H7/00C08G12/40
Inventor 程贤甦
Owner 程贤甦
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