Characteristic Comparison between Paraffine-Base and Naphthene-Base Transformer Oils;
石蜡基和环烷基变压器油的性能比较
The improvmecnt of the measurment about the quantity of grease aid in naphthenic acid;
环烷酸中脂肪酸含量测定方法的改进
Synthetic and application of naphthenic acid derivatives;
环烷酸衍生物的合成与应用
The obtained CNC was further esterified with naphthenic acid at 140 ℃ and octadecyl alcohol at 180 ℃ in turn to form citric acid-neopentylene glycol-citric acid-naphthenic acid-octadecyl alcohol(CNC-NO) claw large molecule.
以新戊二醇、柠檬酸为原料,以对甲苯磺酸为催化剂,甲苯为溶剂,在120℃油浴中反应,合成了以新戊二醇为核的多羟基多酸爪状物小分子柠檬酸-新戊二醇-柠檬酸(CNC);再利用酯化反应依次与带有功能化基团的环烷酸、十八醇分别在140℃和180℃油浴中接枝,合成了新型的多元酯类爪形大分子柠檬酸-新戊二醇-柠檬酸-环烷酸-十八醇(CNC-NO)。
Nynas Petroleum is the world largest naphthenic oil company and has done a lot of research and testing work in this field.
环烷基油的技术和环保优势从而得以体现。
The number of carbon atoms in naphthenic acids from crude oil are in the range of 9~14 with molecular weights of 156~450.
结果表明,孤岛原油中石油羧酸平均相对分子质量在490左右,脂肪酸中C14~16成分占50%以上;原油中环烷酸的碳数在9~30之间,相对分子质量范围为156~450。
Influences of pH values, flotation time,gas velocity,concentration of naphthenic acids on the removal efficiency are discussed.
在内循环浮选柱中,采用泡沫浮选萃取法对模拟废水中的铜锌离子进行了分离回收实验,研究了废水pH值、浮选时间、气速、环烷酸浓度等对分离效果的影响。