Process for polyester-cotton fabric separation and microcrystalline cellulose preparation

The invention discloses a process for polyester-cotton fabric separation and microcrystalline cellulose preparation. With the process provided by the invention, polyester-cotton fabrics undergo the processes of pretreatment, acid hydrolysis, washing and drying of obtained polyester, standing of a re...

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Bibliographische Detailangaben
Hauptverfasser:	SUN HONGYU, LI CHUNGUANG, LU QINGBO, WANG JING, DENG HUI, GUO DONGMEI, JIA RONGXIA, SHENG CHUNYING, TIAN FENG, XIA YANMAO
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATERTREATMENT OR WASTE MANAGEMENT COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS DERIVATIVES THEREOF 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 POLYSACCHARIDES 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
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Beschreibung
Zusammenfassung:	The invention discloses a process for polyester-cotton fabric separation and microcrystalline cellulose preparation. With the process provided by the invention, polyester-cotton fabrics undergo the processes of pretreatment, acid hydrolysis, washing and drying of obtained polyester, standing of a residual solution, washing and centrifuging of precipitates, vacuum filtering, and drying, wherein theprocess of acid hydrolysis adopts a hydrolysis process with hydrochloric acid with a mass percentage concentration of 10% at 95 DEG C to prepare microcrystalline cellulose and recycle an unhydrolyzedpolyester component, so high-purity microcrystalline cellulose is obtained by high-value utilization of waste polyester-cotton fabrics in daily life; meanwhile, the high-purity microcrystalline cellulose is obtained, and polyester fabrics are completely recovered. 本发明公开了种涤棉织物分离并制备微晶纤维素工艺，其将涤棉织物经过预处理、酸水解、涤取出水洗干燥、剩余溶液静置、沉淀物水洗离心、抽滤和烘干工艺，在酸水解工艺中，采用质量分数为10%的盐酸在95℃水解工艺制备微晶纤维素并将未水解的涤组分进行回收，得到高纯度的微晶纤维素高值利用日常生活废弃涤棉织物的同时，既得到了高纯度的微晶