Method for chemically preparing BHET powder from polyester bottle chips

The invention belongs to the technical field of waste recycling, and particularly relates to a method for chemically preparing BHET powder from polyester bottle flakes, which comprises the following steps: A, washing waste polyester bottle flakes, and embrittling at high temperature under the action of an embrittling agent to obtain embrittled bottle flakes; b, crushing, sieving and drying the embrittled bottle flakes to obtain bottle flake powder; c, adding ethylene glycol and an initiator into the bottle flake powder, and carrying out high-temperature reaction to obtain a reaction product; and D, filtering the reaction product to remove impurities, and performing spray drying to obtain BHET powder. The invention solves the problem that the existing PET polyester bottle recycling technology is difficult to depolymerize completely without generating side reaction. 本发明属于废料循环再利用技术领域，具体涉及一种聚酯瓶片化学制备BHET粉料的方法，包括如下步骤：A、将废旧聚酯瓶片洗净，在脆化剂的作用下，高温脆化，获得脆化瓶片；B、所述脆化瓶片粉碎，过筛、干燥后，获得瓶片粉末；C、在所述瓶片粉末中加入乙二醇、引发剂，高温反应，获得反应产物；D、将所述反应产物