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    • 1. 发明申请
    • A PROCESS FOR CONVERSION OF GREY ACRYLIC FIBER WASTE TO ACRYLIC POWDER
    • 将丙烯酸纤维废物转化成丙烯酸粉末的方法
    • WO2013118132A1
    • 2013-08-15
    • PCT/IN2012/000197
    • 2012-03-26
    • ADAB, OmidADAB, Abbas
    • ADAB, OmidADAB, Abbas
    • D01F13/04C08J11/06C08J3/16
    • D01F13/04C08J11/06C08J2333/18Y02P70/629Y02W30/701
    • The invention discloses a process for conversion of grey acrylic fiber waste to acrylic powder comprising of the steps of (a) dissolving the acrylic wastes in a solvent in the concentration of 1-25% and temperature of not more than 90°C; (b) filtration through any coarse filter media to remove any un-dissolved and other impurities before precipitation; (c) precipitation of acrylic polymer from the solution using any commercially available primary-, secondary- and tertiary alcohols in the ratio of 1:1 to 1:10 volume by volume of polymer solution and alcohols; (d) vacuum filtration to remove the solvents mixture; (e) dispersing the polymer in hot/cold DM water in the ratio of 1:5 to 1:20 weight by volume to remove residual solvents; (e) pelletizing the wet precipitate before drying or directly drying the polymer at elevated temperature to remove moisture; (f) pulverizing the dried polymer and sieving to obtain fine acrylic powder; (g) recovering the used solvents by distillation process.
    • 本发明公开了一种将灰色丙烯酸纤维废物转化为丙烯酸粉末的方法,其特征在于包括以下步骤:(a)将丙烯酸废物溶解在溶剂中,浓度为1-25%,温度不超过90℃; (b)通过任何粗过滤介质过滤,以在沉淀前除去任何未溶解的和其他杂质; (c)使用任何市售的伯,仲和叔醇以1:1至1:10体积比的聚合物溶液和醇,从溶液中沉淀丙烯酸聚合物; (d)真空过滤除去溶剂混合物; (e)以1:5至1:20重量比的比例将聚合物分散在热/冷DM水中以除去残余溶剂; (e)在干燥之前造粒湿沉淀物,或在高温下直接干燥聚合物以除去水分; (f)粉碎干燥的聚合物并进行筛分,得到精细的丙烯酸粉末; (g)通过蒸馏处理回收使用过的溶剂。