Method and device for preparing electronic-grade xylene by low-temperature composite adsorption-normal-pressure high-efficiency rectification

By employing a low-temperature composite adsorption-atmospheric pressure high-efficiency distillation method, using a mixed adsorbent of aluminum salt modified bentonite and aminophosphonic acid chelating resin and ethylene glycol dimethyl ether as an auxiliary agent, combined with γ-Al2O3/ZrO2 composite ceramic membrane filtration, the problems of complex equipment and high energy consumption in existing technologies have been solved, achieving efficient and low-cost xylene purification.

CN122404091APending Publication Date: 2026-07-17FTSCI HUBEI BIOTECH CO LTD +3
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
FTSCI HUBEI BIOTECH CO LTD
Filing Date
2026-04-15
Publication Date
2026-07-17

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Abstract

本发明提出了低温复合吸附‑常压高效精馏制备电子级二甲苯的方法及装置，通过“复合吸附预处理→助剂精馏→超声陶瓷膜过滤”的三段式耦合工艺，可实现低温下吸附以及常压下精馏，降低能耗，各步骤协同实现杂质深度脱除，实现工业级二甲苯的高效纯化，制备得到符合SEMI C51‑G1及以上标准的电子级二甲苯产品。
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