Dendrimer derivative as well as preparation and application thereof

The invention discloses a dendrimer derivative as well as preparation and an application thereof. The dendrimer derivative is used as a flocculating agent for treating waste water-based drilling fluid, can realize high-efficiency flocculation of harmful solid phases in the waste water-based drilling fluid under a small addition amount, and still has good flocculation efficiency in a hypersalinityenvironment. The dendrimer derivative is obtained by successive addition and condensation reactions in a solution, and the preparation method has the advantages of simple operation, mild conditions and high yield. The structural formula of the dendrimer derivative is shown as a formula 1, wherein R is independently shown as a formula 2 or a formula 3. 本发明公开了一种树状大分子衍生物及其制备与应用。该树状大分子衍生物作为处理废弃水基钻井液的絮凝剂，可在较小的加量下实现对废弃水基钻井液中有害固相的高效絮凝，且在高矿化度环境中依旧具备良好絮凝效能。该树状大分子衍生物通过在溶液中逐次进行加成与缩合反应而得，其制备方法操作简单，条件温和，收率较高。本发明的树状大分子衍生物的结构式为式1，其中的R单独的为式2或式3。