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    • 10. 发明授权
    • Tetrabromo bisphenol based polyestercarbonate membranes and method of
using
    • 四溴双酚基聚碳酸酯膜及其使用方法
    • US4840646A
    • 1989-06-20
    • US221483
    • 1988-07-19
    • Joginder N. AnandStephen E. BalesDarrell C. FeayThomas O. Jeanes
    • Joginder N. AnandStephen E. BalesDarrell C. FeayThomas O. Jeanes
    • B01D53/22B01D71/48B01D71/50C08G63/682
    • C08G63/682B01D53/22B01D71/48B01D71/50
    • The invention is a membrane comprising a dense skin of a polyestercarbonate, wherein the diphenolic residue in the backbone of the polyestercarbonate is a tetrabromo diphenolic residue, wherein the membrane has a separation factor for oxygen and nitrogen of 6.5 or greater at about 24.degree. C. In another aspect, the invention is a method of separating oxygen from a mixture of gases comprising nitrogen and oxygen, wherein the method comprises (a) contacting the gas mixture with a thin, non-porous membrane comprising a polyestercarbonate described hereinbefore under conditions such that the oxygen selectively permeates through the membrane to the other side of the membrane; and (b) removing the permeated oxygen from the other side of the membrane, wherein separation factor for the oxygen and nitrogen is 6.5 or greater at about 24.degree. C. The membranes of this invention demonstrate surprisingly high separation factors for oxygen and nitrogen separations. The membranes of this invention have good mechanical properties and therefore are useful under more extreme conditions, for example temperature and pressure, than many commercially used membranes.
    • 本发明是一种包含聚酯碳酸酯致密表皮的膜,其中聚酯碳酸酯主链中的二酚残基是四溴二酚残基,其中该膜在约24℃下具有6.5或更高的氧和氮分离因子。 在另一方面,本发明是从包含氮和氧的气体混合物中分离氧的方法,其中所述方法包括(a)使气体混合物与包含上述聚酯碳酸酯的薄的非多孔膜接触,条件是使得 氧选择性地渗透膜到膜的另一侧; 和(b)从膜的另一侧除去渗透的氧气,其中在约24℃下氧和氮的分离因子为6.5或更大。本发明的膜表现出惊人的高分离因子用于氧气和氮气的分离。 本发明的膜具有良好的机械性能,因此在许多商业使用的膜的更极端条件下,例如温度和压力下是有用的。