一种润滑改性剂及其应用,该润滑改性剂包含具有式(I)所示结构的化合物,其中基团R1和R2各自独立地为单键或取代或未取代的C1-C20亚烃基,基团R3和R4 各自独立地为氢或取代或未取代的C1-C10烃基,基团X和Y各自独立地为氢或取代或未取代的C1-C50烃基,且X和Y中的至少一个为氢。 本发明的润滑改性剂产品在油品中低用量即可显着提高油品的润滑性,稳定性好,不易氧化和/或变质,能长期保持良好的润滑性改善效果。
本公开提供了用于识别烃燃料的方法，诸如识别具有荧光强度的标记化合物的存在和/或量，以及通过相关性识别该烃燃料内添加剂包的存在和/或量。
本发明涉及汽油清净剂领域，公开了一种具有汽油清净功能的组合物及其制备方法。该组合物含有芳香族酰胺基聚合物、曼尼希碱清净剂、载体油和任选的添加剂，其中，以组合物的总重量为基准，所述曼尼希碱清净剂的含量为10‑30重量％，所述芳香族酰胺基聚合物的含量为5‑20重量％。本发明还公开了上述组合物的制备方法，该方法包括：将芳香族酰胺基聚合物、曼尼希碱清净剂、载体油和任选的添加剂混合。本发明将曼尼希碱和芳香族酰胺基聚合物结合使用，二者产生协同作用，清净效果显著。
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Novel esters of dithiophosphoric acid and secondary alcohols having two beta quaternary carbon atoms, and salts of such esters suitable as additives in oil compositions are disclosed.
A telomeric acid, a tertiary amine, and an epoxide are reacted in the absence of added water. The product recovered is effective in improving the filterability and reducing the pour point of diesel fuel. Alternatively the product can be prepared by reacting a quaternary ammonium hydroxide and a telomeric acid.
The invention provides the use of a poly(hydroxy-carboxylic acid)amide or -ester derivative of general formula I:wherein R is the residue of an amine, an aminoalcohol or a polyol linked to the or each poly(hydroxycarboxylic acid) via an amide or ester linkage; R1 is hydrogen or optionally substituted hydrocarbyl group containing up to 50 carbon atoms; A is an optionally substituted hydrocarbyl group; n is from 1-100, preferably 1-10 and p is from 1-5, as a fuel additive acting as a detergent and as a lubricity additive in fuel compositions.Moreover, the invention provides a fuel oil composition comprising of a major amount of a fuel oil, and a minor amount of an the additive as well as a additive concentration for use in a fuel oil composition.
An antifoam additive for hydrocarbon oils and in particular fuel oils comprises the combination of an antifoam agent and an ashless dispersant.
Long chain alkyl derivs. of difunctional sulphonic gp.-contg. cpds. of formula (I) are new, where -Y-R2=SO3(-) (+)D-R2, -SO2NR3R2 or -SO3R2; -X-R1=-Y-R2, -CONR3R1, -CO2(-)(+)D-R1, -R4COOR'-R4COOR1 -NR3COR1, -R4OR1, -R4OCOR1, -R4R1 or -N(COR3)R1; D=NR3.3, HNR3.2, H2NR3 or H3N; R1, R2=alkyl, alkoxyalkyl or polyalkoxyalkyl contg. at least 10C atoms in the main chain; R3=hydrocabryl (same or different); R4=nothing or 1-5C alkylene. In the group (i) the C-C bond is either (a) ethylenically unsatd., when A and B are alkyl, alkenyl or substd. hydrocarbyl groups, or (b) part of a cyclic structure which may be aromatic, polynuclear aromatic or cycloaliphatic.
