| 摘要 |
1,153,536. Oleaginous compositions. ESSO RESEARCH & ENG. CO. 16 May, 1967 [8 June, 1966], No. 22736/67. Heading C5F and C5G. 0À5 to 140 p.p.m. by weight of the amide condensation product of an organic monocarboxylic acid having a molecular weight of 600 to 5000 with an aliphatic polyamine is added to organic feed stocks such as light and middle distillates, lubricating oil fractions, cycle oils from cracking operations and virgin and topped crude oils, as an antifoulant to reduce oxidation and polymerization in heat exchange steps at 200 to 1300‹ F. Suitable condensates are made by condensing, at 200-400‹ F., a polyamine with amounts of acid ranging from equimolecular to that sufficient to react with every amino group in the polyamine. Suitable polyamines are those of the formula NH 2 (CH 2 ) n [NH(CH 2 ) n ] m NH 2 wherein n is 2 to 4 and m is 0 to 10; N-aminoalkyl piperazines; and those of the formula H 2 N-R 1 -NR 2 R 3 wherein R 1 is an alkylene radical and R 2 and R 3 are C 1 to C 5 alkenyl radicals: mixtures of polyamines may be used. Suitable acids are those made by oxidation of olefin polymers, of adducts formed between aldehydes and olefins, and of monohydric alcohols; by oxidatine hydroysis of dihalogen derivatives of olefins; by reaction of a halogenated olefin polymer with a ketene or with an unsaturated monocarboxylic acid; and by reaction of a halogenated high molecular weight hydrocarbon with the sodium derivative of an acetoacetic ester or a malonic ester of an alkanol. Antioxidants such as phenyl alpha-naphthylamine and aminoalkyl phenols may also be added to the feed stocks. In a test the condensate is added to an SAE 30 lubricating oil. |
