Direct crosslinking of epichlorohydrin

Direct crosslinking of epichlorohydrin

After adding dispersed phase liquid wax 300 ^# into a 500mL three-necked flask , add 40.

Use formaldehyde as crosslinking agent

Add calcium lignosulfonate, distilled water, acid catalyst, and formaldehyde into a three-necked flask equipped with a stirring and refluxing device .

Sulfhydryl lignin adsorbent

Add a certain amount of thioglycolic acid , acetic anhydride, 36% acetic acid and concentrated sulfuric acid to the ground jar in sequence , and mix them thoroughly; then add an appropriate amount of industrial sulfate lignin to dry the sample, stir to make it evenly saturated; cap Then, put it in a 40℃ oven at a constant temperature, take it out after 3 days, filter it with suction, wash thoroughly with distilled water, and dry under reduced pressure at room temperature to obtain the product sulfhydryl lignin adsorbent, which is brown-yellow solid particles, insoluble in water, but easy It absorbs moisture, so it needs to be sealed, protected from light, and stored at low temperature to avoid sulfhydryl oxidation

Synthesis of lignin-based 3-cyclodextrin ether

The mass ratio of alkali lignin to epichlorohydrin is 1:12.

Related Links: Graft Copolymerization of Lignin and Acrylonitrile