申请人:ZENECA LIMITED
公开号:EP0513966A2
公开(公告)日:1992-11-19
A composition of bibenzimidazoles of the Formula (I) :
wherein
X&Y
which may be the same or different and, taken together, contain a total of from 12 to 52 saturated carbon atoms, are (a) each selected from -R, -COR, -CH2COOR, -CH(COOR)2 and -COOR; or (b) together form a group selected from
and
wherein
R
is an optionally substituted hydrocarbyl group,
A & B
taken together with the two carbon atoms to which they are linked form an optionally substituted benzene ring ; and
C & D
taken together with the two carbon atoms to which they are linked form an optionally substituted benzene ring ;
characterised in that at least 50% by weight of the bibenzimidazoles in the composition are of Formula (II)
wherein
X and Y
are as hereinbefore defined ;
T, U, V & W
which may be the same or different, are H, R1 or OR1 provided at least one of T, U, V & W is R1 or OR1 ; and R1
is C1-6-alkyl ;
which are suitable for use in the extraction of zinc from aqueous solutions of zinc in the presence of other metals.
式 (I) 的联苯并咪唑组合物:
其中
X&Y
(a) 各自选自-R、-COR、-CH2COOR、-CH(COOR)2 和-COOR;或 (b) 共同组成选自以下的基团
和
其中
R
是任选取代的烃基、
A 和 B
与相连的两个碳原子共同构成一个任选取代的苯环;以及
C 和 D
与相连的两个碳原子共同形成一个任选取代的苯环;
其特征在于,按重量计,组合物中至少 50%的联苯并咪唑为式 (II)
其中
X 和 Y
如前定义
T、U、V 和 W
可以是相同或不同的 H、R1 或 OR1,条件是 T、U、V 和 W 中至少有一个是 R1 或 OR1;以及 R1
是 C1-6 烷基;
适用于从含有其他金属的锌水溶液中萃取锌。