Preparation method and application of lignosulfonate cold-recycled asphalt emulsifier

A technology of lignosulfonate and asphalt emulsifiers, which is applied in building components, building insulation materials, buildings, etc., can solve the problems of short working time of lignosulfonate-type cold regenerated emulsifiers, and improve the working time , prolong the transport distance, easy emulsification effect

Inactive Publication Date: 2016-08-24
JIANGSU ZHONGLU NEW MATERIAL SCI & TECH DEV CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The main purpose of the present invention is to overcome the defects of existing emulsified asphalt, and provide a new type of lignin sulfonate type cold regeneration asphalt emulsifier preparation method and its application, to solve the problem of lignosulfonate type cold regeneration emulsification The problem of short working time and quick loss of the agent, so it is more suitable for practical use and has industrial utilization value

Method used

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  • Preparation method and application of lignosulfonate cold-recycled asphalt emulsifier
  • Preparation method and application of lignosulfonate cold-recycled asphalt emulsifier
  • Preparation method and application of lignosulfonate cold-recycled asphalt emulsifier

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Experimental program
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Effect test

Embodiment 1

[0033] Add 0.1mol (10.4g) aminoethylethanolamine and 40g of broad-leaved forest sodium lignosulfonate into the three-necked flask, add water to 183g, stir for 30min; then raise the temperature to 40°C, add dropwise 0.13mol (10.56g) formaldehyde, the rate of addition of 60 drops / min, after the dropwise addition is complete, the temperature is raised to 80°C, and the insulation reaction is carried out for 3.5h to obtain the lignosulfonate type intermediate, the intermediate is cooled to room temperature, and 173g of lignosulfonic acid solution ( Contain 133g water and the sodium lignosulfonate of broad-leaved forest of 40g), be warming up to 40 ℃ afterward, drop the formaldehyde of 0.16mol (13.0g), the rate of addition of 55 drops / min, be warming up to 83 ℃, heat-retaining reaction for 3.5 hours, and double lignosulfonate polyethylene polyamine type cold regenerated emulsifier was obtained. The conversion rate of sodium lignosulfonate of the product was measured by liquid chromat...

Embodiment 2

[0049] Add 0.05mol (5.2g) diethylenetriamine and 40g sodium lignosulfonate of coniferous forest into the three-necked flask, add water to 138g, stir for 30min; then raise the temperature to 45°C, add dropwise 0.11mol (8.9g) Formaldehyde, the rate of addition of 55 drops / min, after the dropwise addition is complete, the temperature is raised to 85°C, and the heat preservation reaction is carried out for 4h to obtain the lignosulfonate type intermediate. The intermediate is cooled to room temperature, and 133g of lignosulfonic acid solution (containing 93g water and the sodium lignosulfonate of coniferous forest of 40g), be warmed up to 50 ℃ afterward, the formaldehyde of 0.14mol (11.4g) is added dropwise, the dropping speed of 55 drops / min, be warmed up to 86 ℃ after dropping completely , heat preservation reaction for 5 hours to obtain double lignosulfonate polyethylene polyamine type cold regenerated emulsifier, the conversion rate of sodium lignosulfonate of the product measu...

Embodiment 3

[0065] Add 0.15mol (9.0g) of ethylenediamine and 40g of straw pulp calcium lignosulfonate to the three-necked flask, add water to 109g, and stir for 30min; then raise the temperature to 40°C, and dropwise add 0.15mol (12.2g) of formaldehyde , the rate of addition of 50 drops / min, after the addition is complete, the temperature is raised to 87°C, and the heat preservation reaction is carried out for 5h to obtain the lignosulfonate type intermediate. The intermediate is cooled to room temperature, and 100g of lignosulfonic acid solution (containing 60g of water and 40g of straw pulp sodium lignosulfonate), then heated up to 50°C, added dropwise 0.16mol (13.0g) of formaldehyde, at a rate of 50 drops / min, after the addition was complete, raised the temperature to 85°C, and kept the temperature for 7 hours , to obtain double lignosulfonate polyethylene polyamine type cold regenerated emulsifier, the conversion rate of sodium lignosulfonate of the product measured by liquid chromatog...

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Abstract

The invention discloses a preparation method and application of a lignosulfonate cold-recycled asphalt emulsifier. The method comprises the following steps: (1) adding amine to a lignosulfonate solution, wherein the molar mass of the added amine accounts for 0.125%-0.5% of mass of lignosulfonate; (2) heating and dropwise adding aldehyde; then, heating again and reacting to obtain an intermediate lignosulfonate polyethylene polyamine, wherein the molar ratio of the added aldehyde to the added amine in step (1) is (1:1)to (4:1); (3) cooling, adding a lignosulfonate solution which is identical to the solution in the step (1) in concentration and mass, and stirring evenly; and (4) heating, dropwise adding aldehyde to the mixed solution obtained in the step (3), and then carrying out heating reaction to obtain a target product. The fluidity loss caused by a sulfonate radical is compensated by increasing the steric hindrance of the lipophilic group of the lignosulfonate emulsifier; the operable time of the cold-recycled asphalt mixture can be greatly prolonged; and the haul distance of the cold-recycled mixture is prolonged. By adjusting proper preparation conditions, the emulsification effect of the product is ensured while the yield is improved.

Description

technical field [0001] The invention relates to a preparation method of an emulsifier, in particular to a preparation method of a lignin sulfonate type cold recycled asphalt emulsifier and its application. Background technique [0002] The alkali papermaking method in our country produces a large amount of lignin sulfonate every year, and the annual lignin produced by papermaking is as high as 4.5 million tons. So far, only about 6% of industrial lignin in my country has been effectively utilized (including about 3 million tons of lignosulfonate and 100,000 tons of alkali lignin). Therefore, the use of lignin sulfonate produced in the paper industry to prepare special asphalt emulsifiers for cold recycling can save resources and protect the environment, and is of great significance to promote the implementation of my country's energy-saving and emission-reduction strategies. [0003] Patent No. 201410526313.0 specifically discloses the use of lignin sulfonate to prepare col...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08H7/00C08J3/03C08L95/00
CPCC08H6/00C08J3/03C08J2395/00
Inventor 潘友强陈李峰耿磊李芳芳
Owner JIANGSU ZHONGLU NEW MATERIAL SCI & TECH DEV CO LTD
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