申请人:THE PROCTER & GAMBLE COMPANY
公开号:EP1172352A1
公开(公告)日:2002-01-16
According to the present invention there is provided a process for retarding the discolouration of dicarboxylic acids, said process comprising heating said dicarboxylic acid to a temperature above its melting point and adding at least one metal ion sequesterant to said dicarboxylic acid.
A further aspect of the present invention provides a composition comprising at least one dicarboxylic acid and at least one metal ion sequesterant. A further aspect of the present invention provides for the use of metal ion sequesterants to retard the discolouration of dicarboxylic acids, particularly molten dicarboxylic acids.
根据本发明,提供了一种延缓二羧酸变色的方法,该方法包括将所述二羧酸加热至其熔点以上,并向所述二羧酸中添加至少一种金属离子螯合剂。本发明的另一个方面提供了一种组合物,包括至少一种二羧酸和至少一种金属离子螯合剂。本发明的另一个方面提供了使用金属离子螯合剂来延缓二羧酸的变色,特别是熔融二羧酸的用途。