Modified alkali lignin ceramic grind-aid dispersing agent and preparation method thereof

Abstract

The invention discloses a modified alkali lignin ceramic grind-aid dispersing agent and a preparation method thereof. The preparation method comprises the following steps of: firstly heating an alkali lignin alkaline solution to 75-85 DEG C and adding sulfonating agents; regulating a system PH (Potential of Hydrogen) value to 3-4 by using dilute sulfuric acid, and adding carboxyl-containing materials dropwise; and then regulating the system PH value to 11-12 by using sodium hydroxide; adding initiating agents, sodium hypophosphite and sodium allyl sulfonate to perform a reaction for 1-5 hours at a temperature of 80-90 DEG C; and obtaining the modified alkali lignin ceramic grind-aid dispersing agent after the reaction is completed. A formulation comprises the following reaction materialsin parts by weight: 100 parts of alkali lignin, 15-25 parts of sulfonating agent, 10-20 parts of carboxyl-containing material, 2-5 parts of initiating agent, 5-10 parts of sodium hypophosphite, and 5-10 parts of sodium allyl sulfonate. The molecules of the ceramic grind-aid dispersing agent have sulfonic groups, carboxyl and phosphonic acid groups and good water solubility so that a raw-material ball-grinding efficiency can be greatly increased; a raw-material ball-grinding time is shortened; a liquidity and stability of ceramic slurry are improved; and an obvious reinforcing effect on an embryonic plant is realized.

Description

technical field [0001] The invention relates to a ceramic grinding aid dispersant, in particular to a modified alkali lignin ceramic grinding aid dispersant and a preparation method thereof. Background technique [0002] At present, my country's ceramic production mainly adopts wet process, that is, the ceramic raw materials are ball-milled into mud first, then dried and formed, and finally fired. The energy consumption of the ball milling process and spray drying reaches 40% of the total energy consumption and accounts for 70% of the installed capacity. Improving the efficiency of ball milling of raw materials, shortening the time of ball milling and reducing the water content in the mud have important practical significance for energy saving, consumption reduction and production cost reduction of ceramic enterprises. Many studies and productions have shown that adding an appropriate amount of grinding aid and dispersant to ceramic slurry can effectively improve the surfac...

AI Technical Summary

Problems solved by technology

Alkali lignin is only soluble in strong alkaline solution, poor water solubility severely limits the application of alkali lignin, resulting in secondary pollution of solid waste

The price of alkali lignin is extremely low, and it has the advantages of rich sources, non-toxicity, and biodegradability. At present, there is no application research on the use of alkali lignin to research and develop ceramic slurry grinding aids and dispersants. Therefore, alkali lignin is improved. The introduction of hydrophilic groups into its molecules improves the dispersion performance, and the development of high-efficiency ceramic grinding aids and dispersants has great social and economic significance for both the ceramic industry and the paper industry.