The invention discloses a preparation method for a modified
disperse dye dispersing agent. The preparation method comprises the following steps of heating a
naphthalene compound to 130-170 DEG C, adding
sulfuric acid to perform sulfonation reaction, cooling to 100-130 DEG C after the sulfonation reaction is finished, adding water, cooling to 80-100 DEG C after the reaction is finished, adding an
aldehyde compound to perform primary
condensation reaction under a temperature condition until the reaction is finished, adding an isomer mixture of CLT (
cross laminated timber) acid, heating to 80-100 DEG C, adding the
aldehyde compound again to perform secondary
condensation reaction, and obtaining the modified
disperse dye dispersing agent after the reaction is finished. The invention also provides a dispersing agent product obtained by the method.
Wastewater produced by the CLT acid produced in an organic
pigment production process is used as a part of production raw materials for producing the modified
disperse dye dispersing agent, so that the production cost of the modified disperse dye dispersing agent is reduced, and the
pollution caused by the production of the
wastewater through the CLT acid on the environment is alleviated; the modified disperse dye dispersing agent is suitable for industrial production.