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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 amphoteric lignin emulsifiers. There are few amphoteric lignin emulsifiers on the market, and their performance is not outstanding.

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

preparation example 1

[0038] This preparation example is the phenolized lignin prepared by the preparation method provided in this application.

[0039] Add 50g of deionized water and 50g of lignin into the four-necked bottle, start stirring, raise the temperature to 60°C, adjust the pH to 10 with 30% sodium hydroxide solution, then add 5g of phenol and 1.5g of aluminum chloride, After reacting at 60°C for 1 hour, an aqueous solution of phenolated lignin was obtained, and dried to obtain phenolated lignin-1.

Embodiment 1

[0046] Weigh 52g of sodium bisulfite, add deionized water to 80g, heat up to 60°C, slowly add 55g of epichlorohydrin dropwise at a rate of 60 drops / min, and react for 2 hours to generate intermediate 1.

[0047] Weigh 140g of the phenolated lignin-1 prepared in Preparation Example 1, add deionized water to 280g, heat up to 60°C, slowly add 30% sodium hydroxide solution to adjust its pH to 10.5±0.2, add 45g of dimethyl Amine, stirred for 15 minutes, then added 40 g of formaldehyde solution with a mass fraction of 37%, raised the temperature to 70° C., and reacted for 4 hours to generate intermediate 2.

[0048] The intermediate 1 and the intermediate 2 were uniformly mixed and reacted at 60° C. for 2 hours to prepare an amphoteric lignin emulsifier.

Embodiment 2

[0050]Weigh 52g of sodium bisulfite, add deionized water to 104g, heat up to 80°C, slowly add 70g of epichlorohydrin dropwise at a rate of 60 drops / min, and react for 1.5 hours to generate intermediate 1.

[0051] Weigh 200g of phenolated lignin-1 prepared in Preparation Example 1, add deionized water to 700g, heat up to 70°C, slowly add 30% sodium hydroxide solution to adjust its pH to 11.0±0.2, add 34g of dimethyl Amine, stirred for 20 minutes, then added 60 g of formaldehyde solution with a mass fraction of 37%, raised the temperature to 80° C., and reacted for 3 hours to generate intermediate 2.

[0052] The intermediate 1 and the intermediate 2 were evenly mixed and reacted at 50° C. for 3 hours to prepare an amphoteric lignin 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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