Zeolite/binder (beta/Al₂O₃) was treated with different concentrations of phosphoric acid, and the samples pre- and post-treatment were characterized by several methods. It was found that the content of tetrahedral framework Al species in the beta zeolite increased after the sample was impregnated with phosphoric acid, and the generated aluminophosphate reduced the external surface area of the catalyst but had no effects on the catalytic ability of the beta zeolite. The realumination behavior of beta zeolite is proposed in this work. Polyphosphate reacted with hexa-coordinated aluminum, resulting in the formation of amorphous aluminophosphate species, which were then transferred to the silicon hydroxyl structure cavity on the zeolite to complete realumination. The influence of the sample before and after phosphoric acid modification on the activity of synthesized polyoxymethylene dimethyl ethers was discussed. When the phosphoric acid concentration was 0.5 M, the time to reach the same conversion of trioxane (about 94%) was shortened by 60 min compared to the parent sample.

沸石/粘合剂（β/ Al ₂ O ₃用不同浓度的磷酸处理），然后通过几种方法对样品进行预处理和表征。发现在用磷酸浸渍样品后，β沸石中四面体骨架Al的含量增加，并且生成的铝磷酸盐降低了催化剂的外表面积，但是对β沸石的催化能力没有影响。在这项工作中提出了β沸石的再金属化行为。聚磷酸盐与六配位的铝反应，形成无定形的铝磷酸盐物质，然后将其转移到沸石上的硅羟基结构腔中以完成复分解。讨论了磷酸改性前后样品对合成的聚甲醛二甲基醚活性的影响。当磷酸浓度为0.5 M时，与母体样品相比，达到相同的三恶烷转化率（约94％）的时间缩短了60分钟。