申请人:——
公开号:US20020063241A1
公开(公告)日:2002-05-30
Drag reducers having the formula:
1
where R
1
is a straight or branched saturated alkyl having at least 12 carbon atoms;
R
2
, R
3
and R
4
are independently lower alkyl of 1 to 4 carbon atoms, aryl, alkylaryl, or alkoxide where the alkoxide units constitute from 1 to 16 alkoxy moieties where the alkoxy moieties are independently from 2 to 4 carbon atoms, or any two of R
2
, R
3
and R
4
are joined together to form cycloalkyl of 5 to 6 carbon atoms, or all three of R
2
, R
3
and R
4
together with the N form a pyridinium ring, where R
2
, R
3
and R
4
may be independently substituted with O or S; and
X
−
is selected from the group of anions consisting of salicylate, thiosalicylate, sulfonate, and hydroxynaphthenate,
have been found to simultaneously function as corrosion inhibitors. Cetyltrimethylammonium salicylate (CTAS) and Cetylpyridinium salicylate (CPS) are particularly preferred drag reducers.
减阻剂的计算公式为
1
其中 R
1
是至少有 12 个碳原子的直链或支链饱和烷基;
R
2
, R
3
和 R
4
独立地为 1 至 4 个碳原子的低级烷基、芳基、烷芳基或烷氧基,其中烷氧基单元构成 1 至 16 个烷氧基,其中烷氧基独立地为 2 至 4 个碳原子,或任意两个 R
2
, R
3
和 R
4
连接在一起形成 5 至 6 个碳原子的环烷基,或所有三个 R
2
, R
3
和 R
4
与 N 一起形成一个吡啶鎓环,其中 R
2
, R
3
和 R
4
可独立地被 O 或 S 取代;以及
X
-
选自由水杨酸盐、硫代水杨酸盐、磺酸盐和羟基环烷酸盐组成的阴离子组、
已被发现同时具有缓蚀剂的功能。十六烷基三甲基水杨酸铵(CTAS)和十六烷基吡啶水杨酸铵(CPS)是特别理想的减阻剂。