Solid Lignin Sulfonate Dispersing Agent for High-Temperature Cement
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Solution Overview
Problem
Lignin sulfonic acid-based dispersing agents exhibit poor heat resistance and are typically liquid, making them inconvenient for use as cement dispersants, particularly under high temperature conditions, and their performance is unsatisfactory in various industrial applications.
Innovation Solution
A solid lignin-containing composition comprising a lignin sulfonic acid-based compound and a water-soluble aromatic compound, with specific thermal weight reduction and decomposition point characteristics, is developed to enhance heat resistance and dispersibility, allowing for use as a dispersing agent in hydraulic compositions and oil field drilling mud.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If lignin sulfonic acid-based dispersing agents are used, then dispersing capability is provided, but heat resistance is poor and they cannot maintain performance under high temperature conditions
Solution Approach 1:
The patent uses composite materials by combining lignin sulfonic acid with water-soluble aromatic compounds to create a new dispersing agent that maintains the dispersing capabilities of lignin while gaining improved heat resistance from the aromatic compound component, thus resolving the contradiction between dispersing performance and thermal stability
Solution Approach 2:
The patent changes the chemical parameters of the dispersing agent by modifying the lignin sulfonic acid structure through reaction with water-soluble aromatic compounds, adjusting molecular weight, functional group composition, and structural configuration to achieve both maintained dispersing capability and enhanced heat resistance
2Ease of operation
If liquid lignin derivatives are used, then dispersing performance can be achieved, but handling convenience is poor and water content recalculation is required at work sites
Solution Approach 1:
The patent applies phase transition by converting the lignin derivative from liquid state to solid state through controlled drying and granulation processes, thereby improving handling convenience while maintaining dispersing performance and eliminating the need for water content recalculation at work sites
3Ease of operation
If solid lignin derivatives are used, then handling convenience is improved and individual packaging is possible, but dissolution in mortar, cement paste, or ready-mixed concrete is required to express intended effect
Solution Approach 1:
The patent applies preliminary action by pre-dissolving the solid lignin derivative in water to create a liquid solution before adding it to mortar, cement paste, or ready-mixed concrete, thereby maintaining handling convenience while ensuring proper dissolution and effectiveness in the final application
4Reliability
If conventional lignin-based dispersing agents are used, then basic dispersing function is provided, but performance in various industrial applications is unsatisfactory
Solution Approach 1:
The patent achieves universality by designing a lignin derivative with multiple functional groups and optimized molecular structure that can effectively disperse various materials including cement, drilling mud, and other industrial substances, thereby expanding application range while maintaining reliable dispersing performance across different industrial applications
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solid lignin derivative composition provides improved heat resistance and dispersibility, enabling effective use in high-temperature applications and improving the properties of dispersed substances, such as hydraulic compositions, dyes, and drilling muds.
Implementation Method 1
a lignin-containing composition, comprising a lignin sulfonic acid-based compound and a water-soluble compound
Implementation Method 2
a thermal weight reduction rate thereof is 50 to 80%, and a thermal decomposition point is 350° C. or higher and lower than 400° C.
Data Source
AI summary
A composition including: a lignin sulfonic acid-based compound and a water-soluble compound; a lignin derivative that is a reaction product of the lignin sulfonic acid-based compound with an aromatic water-soluble compound; or the lignin sulfonic acid-based compound, the water-soluble compound, and the lignin derivative. The composition is a granular product or a liquid product.