COMPOSITE HOLLOW FIBER MEMBRANE MODULE AND ITS MANUFACTURING METHOD

• Main Authors: TAKADA RYOICHI, SUZUMURA KEITARO, OSAKI TAKEHIRO, KUBOTA NOBORU
• Format: Patent
• Language: English; Japanese
• Published: 19.04.2024
• Subjects: PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; TRANSPORTING

To provide a forward osmosis composite hollow membrane module where a practically sufficient durability (reverse pressure durability) against a pressure from a support membrane side and a high percolation amount are compatible in a forward osmosis technology for a liquid mixture containing an organic solvent.SOLUTION: This invention pertains to a forward osmosis composite hollow fiber membrane module having a hollow fiber bundle where the hollow fiber is provided with a separation active layer of a high molecular weight polymer membrane on the inner surface of a microporous hollow fiber support membrane consisting of a high molecular weight polymer containing polyketone with a hollow fiber bundle membrane area of 100 cm2 or more, and with an average thickness variation coefficient of 0 - 60% of a separation active layer, in the radial direction and lengthwise direction of the hollow fiber bundle, calculated by means of a method for measuring the mass of the separation active layer part in a scan type electronic microscope image photographed from a cross section in the thickness direction of the separation active layer.SELECTED DRAWING: Figure 1 【課題】有機溶媒を含む液状混合物に対する正浸透技術において、支持膜側からの圧力に対する実用上十分な耐久性（逆圧耐久性）と、高い透水量とが両立された正浸透複合中空糸膜モジュールを提供すること。【解決手段】中空糸糸束を有する正浸透複合中空糸膜モジュールであって、中空糸が、ポリケトンを含む高分子重合体から成る微細孔性中空糸支持膜の内表面に、高分子重合体薄膜の分離活性層を設けた中空糸であり、 中空糸糸束の膜面積が１００ｃｍ２以上であり、分離活性層の厚さ方向の断面を撮影した走査型電子顕微鏡画像における分離活性層部分の質量を測定する方法により算出された、中空糸糸束の半径方向および長さ方向における分離活性層の平均厚さの変動係数が０～６０％である、モジュール。【選択図】図１