Phenolated lignin, amphoteric lignin emulsifier, emulsified asphalt and preparation method

A technology of lignin emulsifier and phenolic lignin, applied in chemical instruments and methods, chemical/physical processes, building components, etc., can solve problems such as poor performance and achieve the effect of excellent emulsification performance

Active Publication Date: 2021-03-19
JINAN SHENGQUAN GROUP SHARE HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the use of lignin to prepare asphalt emulsifiers mainly focuses on cations, and there are few studies on amph

Method used

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  • Phenolated lignin, amphoteric lignin emulsifier, emulsified asphalt and preparation method
  • Phenolated lignin, amphoteric lignin emulsifier, emulsified asphalt and preparation method
  • Phenolated lignin, amphoteric lignin emulsifier, emulsified asphalt and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0037]Preparation 1

[0038]This system preparation is phenolic lignin obtained by the preparation method provided herein.

[0039]50 g of deionized water, 50 g of lignin, stirring in a four-mouth bottle, stirring, warmed to 60 ° C, transferred to 10 with a 30% sodium hydroxide solution, then add 5 g of phenol and 1.5 g of aluminum chloride, After 1 h at 60 ° C for 1 h, aqueous solution of phenolic lignin was obtained, and the phenolic lignin-1 was dried.

Example Embodiment

[0045]Example 1

[0046]52 g of sodium bisulfite was weighed, and deionized water was added to 80 g, warmed to 60 ° C, slowly added 55 g of epoxypropylene chloropropane, and the dropping rate of 60 drops / min, the reaction was 2 hours, and the intermediate 1 was formed.

[0047]The phenolic lignin-1 obtained by 140 g of Preparation Example 1 was weighed, and deionized water was added to 280 g, warmed to 60 ° C, slowly add 30% sodium hydroxide solution to 10.5 ± 0.2, add 45 g of dimethyl. Amine was stirred for 15 minutes, then the mass fraction was 37% of the formaldehyde solution 40g, and the temperature was tapered to 70 ° C, and the intermediate 2 was generated for 4 hours.

[0048]The intermediate 1 and the intermediate 2 were mixed uniform, 2 hours at 60 ° C for 2 hours, prepared to obtain a zwitric lignin emulsifier.

Example Embodiment

[0049]Example 2

[0050]It is weighed 52 g of sodium bisulfite, and deionized water is added to 104 g, warmed to 80 ° C, slowly drop 70 g of epoxy chloropropane, and the dropping rate of 60 drops / min, the reaction is 1.5 hours, and the intermediate body 1 is generated.

[0051]Weigh 200 g of prepared phenolicin-1 obtained, add deionized water to 700 g, temperature rise to 70 ° C, slowly add 30% sodium hydroxide solution to adjust its pH to 11.0 ± 0.2, add 34G Dimethyl The amine was stirred for 20 minutes, then the addition of 37% of the formaldehyde solution was 60 g of a formaldehyde solution, warmed to 80 ° C, and the intermediate 2 was formed for 3 hours.

[0052]The intermediate 1 and the intermediate 2 were mixed uniform, and the reaction was reacted at 50 ° C for 3 hours to prepare a zwitrin emulsifier.

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Abstract

The invention discloses phenolated lignin, an amphoteric lignin emulsifier, emulsified asphalt and a preparation method of the phenolated lignin. The preparation method of the phenolated lignin comprises the following steps: adding deionized water into lignin, heating to 40-60 DEG C, adding alkali to adjust the pH value to 9-12, adding a catalyst, adding phenol, and reacting at 60-100 DEG C for 0.5-4 hours to generate the phenolated lignin; the preparation method of the amphoteric lignin emulsifier comprises the following steps: mixing a sodium hydrogen sulfite solution with epoxy chloropropane, and reacting to generate a first intermediate; adding the phenolated lignin prepared by the method into deionized water, heating to 60-80 DEG C, adding a sodium hydroxide solution to adjust and stabilize the pH value of the phenolated lignin solution, cooling to 40-60 DEG C, adding dimethylamine, stirring for 10-30 minutes, adding a formaldehyde solution, heating to 70-80 DEG C, and reacting for 3-8 hours to generate a second intermediate; and mixing the two intermediates to generate the amphoteric lignin emulsifier. The phenolated lignin with high reaction activity is adopted and has hydrophilic groups such as amido, sulfo and hydroxyl, and the prepared emulsifier has excellent emulsifying performance.

Description

technical field [0001] The invention belongs to the field of asphalt, and in particular relates to phenolized lignin, an amphoteric lignin emulsifier, emulsified asphalt and a preparation method. Background technique [0002] Lignin is a natural renewable biomass resource, which mainly exists in the waste liquid produced by the paper industry. Lignin is a high polymer with phenylpropane as the basic unit and linked together by carbon-carbon bonds and ether bonds. Lignin contains active functional groups such as phenolic hydroxyl group, alcoholic hydroxyl group, carbonyl group and methoxyl group, which can undergo sulfonation, oxidation, reduction, copolymerization, grafting and other reactions. Due to the special structure of lignin, lignin can be used to prepare cations, anions, Nonionic and amphoteric emulsifier. [0003] In the prior art, there is a method of phenolizing and modifying alkali lignin to improve the reactivity of lignin, and the lignin emulsifier prepared ...

Claims

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Application Information

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IPC IPC(8): C08H7/00B01F17/50C08J3/03C08L95/00C09K23/50
CPCC08H6/00C08J3/03C08J2395/00C09K23/00
Inventor 唐地源江成真韩文彬张燕高绍丰
Owner JINAN SHENGQUAN GROUP SHARE HLDG
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