Function of Lignosulfonate

Chemical Threats 1.3.3.0 Tab 1 of 1_0

Lignosulfonate Function

Function of Lignosulfonate

Ligno sulfonate ( sodium lignosulfonate ) pulping process of bamboo wood and straw extract, modification reaction was concentrated and spray- drying. Product is light yellow ( brown ) free flowing powder, soluble in water, chemically stable, long-term sealed storage without decomposition. Lignin series is a surfactant , can be modified , processing , and other methods produce more complex products, mainly for resin, rubber , dyes, pesticides , ceramics, concrete , asphalt , feed , water treatment, water coal slurry , concrete , refractories, oil drilling , compound fertilizer, smelting, casting, adhesives. Proved by experiments , lignin sulfonate to prevent the sand of the soil is very effective, you can also do the desert sand fixing agent.

Key Features include

1, concrete water reducer : low air-entraining powdered Department of retarding superplasticizer , belonging anionic surfactant , the adsorption of cement and dispersion can improve various physical properties of concrete . More than 13% less water and improve the workability of concrete , and can greatly reduce the initial heat of hydration of cement hydration can be re-dubbed early strength agent , retarder, antifreeze , pumping agent , and Naphthalene superplasticizer compound made ​​of liquid admixtures basically no precipitate .
2 , CWS : CWS in the preparation process of adding this product can improve the high mill output to maintain normal system conditions pulp , pulp and power consumption reduction , increased concentration of the CWS in the gasification process , oxygen consumption , coal down , cold gas efficiency, and can reduce the viscosity of the slurry and to achieve some stability and mobility.
3 , refractories and ceramic body enhancer: in large size tiles and bricks manufacturing process, raw material particles can make the body firmly bonded together , can dry green strength increased by 20 % -60 % or more.
4 , the dye industry and pesticide processing filler and dispersing agent: for vat dyes and disperse in the dispersing agent and the filler , can make the dye power increased, the color more uniform , reducing the dye grinding time ; in the pesticide processing can be used as fillers , dispersing agents and suspending agents, wettable powders greatly improved suspension rate and wetting properties.
5 , powdery and granular materials as binders : For iron ore , lead and zinc powder, coal , coke carbon powder pressure ball ; cast iron, cast sand repression ; mud brick tiles and other extrusion molding ; mineral aggregate balling obtain high strength, good stability, lubricating mold with good results.
6, in the drilling for diluting dispersant, viscosity reducer ; improve the flow of crude oil , reduce energy consumption. Of petroleum products , as the cleansing agent , a dispersant, overbased additives, rust inhibitors , antistatic agents , emulsifying lowering agent , paraffin wax elimination agent.

Preparation

Production methods one with a pulp mill waste as a raw material , generally three preparation methods .
Calcium hydrogen sulfite pulping of waste paper pulp contained in the sulfite or bisulfite directly with lignin hydroxyl molecules combine to generate lignin sulfonate. To waste 10% of the milk of lime is added in (95 ± 2) ℃ heated 30 min. The calcification was allowed to settle , the precipitate was filtered off , washed with water and sulfuric acid . Filtered to remove the calcium sulfate . Then to the filtrate was added Na2CO3, to turn into calcium sodium lignosulfonate . The reaction temperature is 90 ℃ appropriate, the reaction for 2 h , allowed to stand , filtered to remove impurities such as calcium sulfate . The filtrate was concentrated , cooling and crystallization of products.
Pulp and waste paper proceeds with lye as a raw material . First, waste to 50% concentrated sulfuric acid was added , stirring 4 ~ 6 h. Then lime by sedimentation , filtration, beating , acid , sodium carbonate conversion, enrichment , drying products
Production methods two different superplasticizer MY.
Calcium hydrogen sulfite pulping was contained in the pulp waste sulfite or bisulfite directly with lignin hydroxyl molecules combine to generate lignin sulfonate. To waste 10% of the milk of lime is added in (95 ± 2) ℃ heated 30 min. The solution was allowed to stand Xiao calcification , precipitate was filtered off , washed with water and sulfuric acid . Filtered to remove the calcium sulfate . Then to the filtrate was added Na2CO3, to turn into calcium sodium lignosulfonate . The reaction temperature is 90 ℃ appropriate, the reaction for 2 h , allowed to stand , filtered to remove impurities such as calcium sulfate . The filtrate was concentrated , cooling and crystallization of products.

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