| abstract |
The invention discloses a kind of sodium lignin sulfonate dye dispersant and preparation method thereof, the preparation method has obtained the sodium lignin sulfonate dye dispersant product of low contamination using papermaking wastewater alkali lignin as raw material, through a series of chemical processes such as sulfomethylation, substitution reaction and oxidation reaction.Compared with current technology, the present invention not only greatly reduces the dosage of closed reagent such as epoxychloropropane and oxidant such as hydrogen peroxide, and reduces the temperature and pressure of reaction, reduces production cost and reaction time；In addition, the product colour that preparation method of the present invention is produced is partially shallow, it is even better that heat-resistant stability and the test effect of staining all reach colleague's level, professional test result shows that the sodium lignin sulfonate dye dispersant of the present invention reaches 45 grades of (cottons of staining, terylene, acrylic fibers), heat-resistant stability is equally also very high, reaches 45 grades (155 DEG C). |