High-molecular weight allyl alcohol polyoxyethylene polyoxypropylene ether and preparation method

A preparation method for an allyl alcohol polyoxyethylene polyoxypropylene ether, comprising:

• S1, adding an allyl alcohol raw material and a supported catalyst Rb-supported nano-hydroxyapatite (Rb-NHPA) into a first reaction kettle, and heating after an interior of the first reaction kettle is replaced with nitrogen gas;
• S2, after an internal temperature of the first reaction kettle is raised to a reaction temperature, continuously feeding a mixture of ethylene oxide (EO) and propylene oxide (PO) for reaction, and after the mixture is added, performing reaction until an internal pressure of the first reaction kettle is no longer decreased, stopping the reaction, and removing unreacted EO and PO and aldehyde by-product in vacuum, to obtain a crude product of the allyl alcohol polyoxyethylene polyoxypropylene ether;
• and
• S3, after the internal temperature of the first reaction kettle is reduced, dropwise adding an acetic acid into the first reaction kettle so that the crude product of the allyl alcohol polyoxyethylene polyoxypropylene ether is neutralized to be neutral, stirring, and filtering, to obtain the allyl alcohol polyoxyethylene polyoxypropylene ether.