Real Madrid Technology has obtained a new invention patent authorization. The patent is called "A method for preparing high molecular weight polyether polyols using waste oil". The patent application number is CN202210188515.3, and the authorization date is 2023. November 14th.
Patent abstract: The present invention provides a method for preparing high molecular weight polyether polyols using waste grease, which includes the following steps: S1. Conduct an esterification reaction of waste grease and polyol under a Lewis acid catalyst; S2. Cool down after the reaction. Suction filtration at 70-80°C to obtain the reaction precursor, recover the Lewis acid catalyst and reuse it; S3. Add the filtered reaction precursor in step S2 to the catalyst, and continuously feed EO/ The PO mixture undergoes a polymerization reaction, and is matured for 10 minutes after passing through the epoxy. Then, the temperature is lowered and moisture and small molecules are removed to obtain a high molecular weight polyether of waste oil. The polyether prepared by the method of the present invention has the advantages of high molecular weight, narrow distribution, and high effective composition content.
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