Sulfated dicarboxylic acids, amine salts thereof, or inorganic salts
thereof may be used in various applications, including use as
corrosion-inhibiting additives (e.g., in oil-field drilling applications
and in metalworking applications), as emulsifiers (e.g., in metalworking
applications), and as lubricity-enhancing additives (e.g., in metalworking
applications). Suitable sulfated dicarboxylic acids include sulfated
cyclic dicarboxylic acids, as well as their amine salts or inorganic
salts, according to the formula:
##STR1##
wherein:
(a) x and y each independently represents an integer from 3 to 9, wherein x
and y together equal 12; (b) Z represents a moiety selected from the group
consisting of hydrogen and COOM, wherein at least one Z is hydrogen and
one Z is COOM; (c) W represents a moiety selected from the group
consisting of hydrogen and --O--SO.sub.3 M, wherein at least one W
represents --O--SO.sub.3 M; and (d) M represents a member selected from
the group consisting of hydrogen, an inorganic ion, or an amine radical,
wherein each M may be the same or different. In some examples, at least
one M may constitute an alkanolamine radical, such as a triethanolamine
radical, a diglycolamine radical, a monoethanolamine radical, and an
isopropanolamine radical, or an alkali metal ion, such as sodium ions
and/or potassium ions.
