A modified lignosulfonate water reducer and its preparation method

A technology of lignosulfonate and water-reducing agent, applied in the field of water-reducing agent, can solve the problems of poor bubble quality, concrete slump, bleeding phenomenon, etc. The effect of retardation and air entrainment

Active Publication Date: 2021-08-06
贵州凯襄新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Due to the low water-reducing rate of lignosulfonate water-reducing agent, the poor quality of air bubbles, the phenomenon of concrete slump and bleeding is easy to occur, and the adaptability is poor. Therefore, it is very important to improve it

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A modified lignin sulfonate water water, including: 50g of sugarcane slag, 60g of formic acid solution, 60g of chloroacetic acid solution, tea polyphenol 8g, betaine 4g, methacrylate 0.6 g, sulfonating agent 7g;

[0030] The formic acid solution has a mass concentration of 45%;

[0031] The chloracetic acid solution has a mass concentration of 25%;

[0032] The sulfonation agent is sodium hydroxypropyl sulfonate;

[0033] The preparation method of the modified lignin sulfonic acid salt suction agent includes the steps of:

[0034] S1 once cooking: After mixing the sugarcane slag with the chloroacetic acid solution, the temperature is concentrated in a temperature of 95 ° C for 15 min, fell to normal temperature, filtration, and solid form A;

[0035] S2 2. After mixing the solid matter A and the formation of the formic acid, methyl methacrylate, the temperature is concentrated under temperature to concentrate 20 min, fell to normal temperature, filtration, and solid form B;...

Embodiment 2

[0043] A modified lignin sulfonic acid salt water repellent, including: 40g of a solid, 40g of formic acid solution, 40g of chloroacetic acid solution, 5 g of tea polyphenol, betaine 1g, methyl methacrylate 0.2 g, sulfonating agent 2g;

[0044] The formic acid solution has a mass concentration of 40%;

[0045] The chloracetic acid solution has a mass concentration of 20%;

[0046] The sulfonation agent is sodium hydroxymethylsulfonate, sodium hydroxyethylsulfonate, sodium hydroxypropyl sulfonate, sodium hydroxylasion, sodium hydroxybutylsulfonate;

[0047] The preparation method of the modified lignin sulfonic acid salt suction agent includes the steps of:

[0048] S1 once, after mixing the sugar canesets and chloroacetic acid solution, in the closed environment of 85 ° C for 10 min, fell to normal temperature, filtration, and solid form A;

[0049] S2 2 Cooking: After mixing the solid matter A with a formic acid solution, methyl methacrylate, the temperature is concentrated under...

Embodiment 3

[0057] A modified lignin sulfonic acid salt water-water, including: sugar caneseed 40g, formic acid solution 55g, chloroacetic acid solution 50g, tea polyphenol 7g, betaine 2g, methyl methacrylate 0.4 g, sulfonating agent 5g;

[0058] The formic acid solution has a mass concentration of 42%;

[0059] The chloracetic acid solution has a mass concentration of 24%;

[0060] The sulfonation agent is a mixture of sodium hydroxymethylsulfonate, sodium hydroxyethylsulfonate, sodium hydroxylane sulfonate, sodium hydroxybutylsulfonate;

[0061] The preparation method of the modified lignin sulfonic acid salt suction agent includes the steps of:

[0062] S1 once, after mixing the sugar canesets with chloroacetic acid solution, in a closed environment at a temperature of 90 ° C for 12min, fell to normal temperature, filtration, solid form A;

[0063] S2 2 Cooking: After mixing the solid matter A with the formate of the formic acid, methyl methacrylate, the temperature is concentrated under t...

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PUM

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Abstract

The invention relates to the technical field of water reducers, specifically a modified lignosulfonate water reducer and a preparation method thereof, comprising, in parts by weight: 30-50 parts of bagasse, 40-60 parts of formic acid solution, and chloroacetic acid solution 40-60 parts, 5-8 parts of tea polyphenols, 1-4 parts of betaine, 0.2-0.6 parts of methyl methacrylate, 2-7 parts of sulfonating agent, the water reducing agent of the present invention can Water reduction within a certain range, high fluidity of cement slurry, multiple reactive points, good water reduction effect, good air bubble performance, high slump retention, water reduction rate as high as 50%, and the dosage is generally 0.08‑0.13%. Good performance, stable storage effect, long-term storage will not cause the stability of the water reducing agent to decrease, the effective components of the water reducing agent will be lost or the water reducing agent will fail.

Description

Technical field [0001] The present invention relates to a water reducing agent technology, and a specific modified lignin sulfonate water water repellent and a preparation method thereof. Background technique [0002] Natural plant lignin and pulpous paper black fluid, its own reaction activity is not large, can be directly applied to industrial chances, but due to a large number of carbonyl groups, methoxy groups in lignin molecular structures, Phenolic hydroxyl groups, various ether bonds and aliphatic hydroxyl groups, etc., the lignin can not only chemically react with pro-nuclear reagents and phthalons, such as reduction reaction, oxidation, acylation, sulfonation, alkylation, halogenation Reaction, nitrification, diazotization reaction, polycondensation reaction, and graft copolymerization reaction, etc. [0003] Ligninosulfonate water reduction agent belongs to ordinary water-watering agents, generally derived from the lignin sulfonate recovered by the pulping paper black s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/18C08H7/00C04B103/30
CPCC04B24/18C04B2103/302C08H6/00
Inventor 张鑫
Owner 贵州凯襄新材料有限公司
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