会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 7. 发明公开
    • 폐방향족 폴리카보네이트로부터 방향족 디히드록시화합물의 알칼리 금속염 수용액을 얻는 방법
    • 从废弃芳香族聚碳酸酯生产芳族二羟基化合物的碱金属盐的水溶液的方法
    • KR1020080008333A
    • 2008-01-23
    • KR1020077023995
    • 2005-04-20
    • 테이진 카세이 가부시키가이샤
    • 오가사와라가즈요시
    • C07C37/52C07C37/66C07C37/72C07C37/82
    • C07C37/64C08G64/04C08J11/16C08J2369/00Y02W30/705C07C39/235
    • A method for decomposing a waste aromatic polycarbonate by an aqueous solution of an alkali metal hydroxide and producing an aqueous solution of an alkali metal salt of an aromatic dihydroxy compound, which comprises (1) a dissolution step of dissolving the waste aromatic polycarbonate into a chlorinated hydrocarbon solvent, (2) a decomposition step of adding an aqueous solution of an alkali metal hydroxide to the resultant solution, to decompose the aromatic polycarbonate, (3) a re-dissolution step of adding water to the liquid decomposed product to dissolve solids, (4) a two-phase forming step of allowing the resultant liquid product from the previous step to stand, to thereby form an organic solvent phase (an organic phase) and an aqueous solution phase (water phase), and (5) a separation and recovery step of separating the water phase from the organic solvent phase and recovering the water phase. The above method allows an aqueous solution of a metal salt of an aromatic dihydroxy compound having high quality and thus being useful as a raw material for a polycarbonate to be produced from a waste aromatic polycarbonate, with a short decomposition time, at a low cost, and thus, advantageously from an industrial view point.
    • 一种通过碱金属氢氧化物的水溶液分解废芳族聚碳酸酯并制备芳族二羟基化合物的碱金属盐的水溶液的方法,其包括(1)将废芳族聚碳酸酯溶解在氯化物中的溶解步骤 烃溶剂,(2)向所得溶液中加入碱金属氢氧化物水溶液以分解芳族聚碳酸酯的分解步骤,(3)向液体分解产物中加入水以溶解固体的再溶解步骤, (4)使来自前一步骤的所得液体产物静置的两相形成步骤,从而形成有机溶剂相(有机相)和水溶液相(水相),和(5)分离 以及从有机溶剂相分离水相并回收水相的回收步骤。 上述方法允许具有高质量的芳族二羟基化合物的金属盐的水溶液,因此可以以较低的成本用于由废芳香族聚碳酸酯制造的聚碳酸酯的原料,其分解时间短, 因此有利地从工业观点出发。