摘要:
A new copolymer composition comprising the soft segment of an aliphatic polyester and the hard segment of a highly halogenated polyurethane containing from 3 to 36 halogen atoms is disclosed. The new halogenated polyurethane copolymer membrane has high thermal stability, and good selectivity and permeability for separation of an aromatic/saturate mixture.
摘要:
A new copolymer composition comprising the soft segment of an aliphatic polyester and the hard segment of a highly halogenated polyurethane containing from 3 to 36 halogen atoms is disclosed. The new halogenated polyurethane copolymer membrane has high thermal stability, and good selectivity and permeability for separation of an aromatic/saturate mixture.
摘要:
A new copolymer composition comprising the hard segment of a polyimide and the soft segment of an oligomeric aliphatic polyester. The new polyimide copolymer membranes have exhibited high thermal stability for separation of an aromatic/saturate mixture. These new membranes have higher aromatic/saturate selectivity than polyurethanes.
摘要:
A new copolymer composition comprises the hard segment of a polyimide and the soft segment of an oligomeric aliphatic polycarbonate or a mixture of an oligomeric aliphatic polycarbonate and an oligomeric aliphatic polyester. The new polyimide copolymer membranes have exhibited high selectivity and flux for separation of an aromatic/saturate mixture.
摘要:
A new copolymer composition comprising the hard segment of a polyimide and the soft segment of an oligomeric aliphatic polyester. The new polyimide copolymer membranes have exhibited high thermal stability for separation of an aromatic/saturate mixture. These new membranes have higher aromatic/saturate selectivity than polyurethanes.
摘要:
The present invention is a method for separating aromatics from saturates using a non-porous polycarbonate membrane. In a preferred embodiment, the polycarbonate membrane may be crosslinked.
摘要:
The present invention describes a method for the synthesis of saturated aliphatic polyesters by reaction of saturated or aromatic diacid chlorides with oligomeric aliphatic polyester diols, a method to thermally crosslink membranes prepared from the above saturated aliphatic polyesters, and the use of the crosslinked membranes to separate aromatics from saturates.
摘要:
The present invention described a method for the synthesis of saturated aliphatic polyesters by reaction of saturated or aromatic diacid chlorides with oligomeric aliphatic polyester diols, a method to thermally crosslink membranes prepared from the above saturated aliphatic polyesters, and the use of the crosslinked membranes to separate aromatics from saturates.
摘要:
A gas treating composition prepared by reacting 2-amino-2-methyl-1-propanol with KOH, diluting with water and adding K.sub.2 CO.sub.3 and a vanadium corrosion inhibitor.
摘要翻译:将2-氨基-2-甲基-1-丙醇与KOH反应制备的气体处理组合物,用水稀释并加入K 2 CO 3和钒缓蚀剂。
摘要:
A crosslinked copolymer composition is derived from an aliphatic polyester, a dianhydride and a diicoyanate. The copolymer membrane has high thermal stability and good aromatic/saturate selectivity and permeability.