申请人:CELANESE CORPORATION
公开号:EP0149552A2
公开(公告)日:1985-07-24
Novel microporous particles of polybenzimidazole (PBI) resin, characterized by a reduced bulk density, a surface area of at least 10m2/g, a porosity of at least about 10%, and an average pore diameter of from about 50 to 500 Angstroms are provided by emulsification-precipitation or atomizing-non-solvent quenching techniques. The disclosed microporous PBI particles are particularly suitable for use as substrates in chromatographic processes such as ion-exchange, separations, purifications, etc., as well as catalysts or chemical reagents in polymer supported reactions. Microporous PBI particles of varying acidity/basicity and/or anionic cationic exchange characteristics, and/or containing various functional groups for use in chemical conversions, may be obtained by treatment of the PBI resin with various organic and inorganic acids, either during particle formation or subsequent thereto.
通过乳化-沉淀或雾化-非溶剂淬火技术提供了聚苯并咪唑(PBI)树脂的新型微孔颗粒,其特征是体积密度降低,表面积至少为 10m2/g,孔隙率至少约为 10%,平均孔径约为 50 至 500 埃。所公开的微孔 PBI 颗粒特别适合用作离子交换、分离、纯化等色谱过程中的基质,以及聚合物支持反应中的催化剂或化学试剂。在颗粒形成过程中或之后,用各种有机酸和无机酸处理 PBI 树脂,可获得具有不同酸度/碱度和/或阴离子阳离子交换特性和/或含有各种官能团的微孔 PBI 颗粒,用于化学转换。