一种基于含氟离子液体制备硅铝型分子筛的方法
The preparation of silica-alumina molecular sieves using fluorine-containing ionic liquids solves the problems of high pressure and pollution associated with traditional methods, achieving simplified processes and environmentally friendly synthesis, and producing molecular sieves with high crystallinity.
CN119683647BActive Publication Date: 2026-07-17INSTITUTE OF PROCESS ENGINEERING CHINESE ACADEMY OF SCIENCES
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- INSTITUTE OF PROCESS ENGINEERING CHINESE ACADEMY OF SCIENCES
- Filing Date
- 2024-12-19
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
Existing methods for preparing silica-alumina molecular sieves require large amounts of water as a solvent, involve cumbersome synthesis steps, pose high-pressure safety hazards, and pollute the environment. Traditional fluorine-based routes use highly toxic HF.
Method used
Using fluorine-containing ionic liquids as solvents, templates, and mineralizers, silica-alumina molecular sieves are prepared through grinding and hydrothermal crystallization, eliminating the need for pre-crystallization, reducing pressure and waste liquid discharge, and allowing the ionic liquids to be recycled.
Benefits of technology
Simplify the synthesis process, reduce pressure, improve crystallinity, reduce environmental pollution, and achieve green synthesis of molecular sieves.
✦ Generated by Eureka AI based on patent content.
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Figure CN119683647B_ABST
Abstract
本发明公开了一种基于多功能含氟离子液体制备硅铝分子筛的方法，该方法使用含氟离子液体同时作为溶剂、模板剂和矿化剂制备硅铝分子筛，具体包括以下步骤：首先将固体原料硅源、铝源和含氟离子液体按照一定比例充分研磨混合，随后转移至水热釜中，于100～180℃条件下晶化6～120小时；随后将反应产物充分洗涤、干燥，得到结晶度高且硅铝比可控的硅铝型分子筛。传统氟基路线制备分子筛过程中需使用剧毒、高腐蚀性的HF，本发明提供的方法可避免HF的使用，且含氟离子液体同时作为溶剂、模板剂和矿化剂，省去了预晶化过程，缩短了合成时间，并大幅降低了制备过程压力，此外，离子液体可回收利用，减少了废液排放。
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