Recycling method of polyethylene in superfine fiber preparation

• Main Author: LIN HAIBIN
• Format: Patent
• Language: Chinese; English
• Published: 15.02.2017
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATERTREATMENT OR WASTE MANAGEMENT; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; GENERAL PROCESSES OF COMPOUNDING; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; THEIR PREPARATION OR CHEMICAL WORKING-UP; WORKING-UP

The invention discloses a recycling method of polyethylene in superfine fiber preparation. The recycling method includes: taking part of solid waste from superfine fiber production to be crushed and soaked in hydrochloric acid; extracting pretreated solid bodies with composite organic solvent, and meanwhile performing extraction by adding part of assistant; adding remaining solid bodies after extracted in a toluene solution and then heating till the solid bodies are fully dissolved by controlling the temperature; placing an adsorption column loaded with XDA (m-xylenediamine)-1 macroreticular resin in a constant-temperature oven, and cooling through the adsorption column to separate out high-purity polyethylene. 本发明公开了种超细纤维制备中聚乙烯的回收再利用方法，取部分超细纤维生产中的固体废弃物进行粉碎，用的盐酸进行浸泡；将预处理后的固体用复合有机溶剂进行提取，同时加入部分助剂，提取；提取后的剩余固体加入甲苯溶液中，然后控制温度加热至固体全部溶解；将装有XDA-1大孔吸附树脂的吸附柱置于恒温箱中，通过该吸附柱，冷却，即有高纯度聚乙烯析出。