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    Process for improving the cold-flow properties of fuel oils
    41.
    发明授权
    Process for improving the cold-flow properties of fuel oils 失效
    改进燃油的冷流特性的方法

    公开(公告)号：US6090169A

    公开(公告)日：2000-07-18

    申请号：US235724

    申请日：1999-01-22

    申请人： Matthias Krull ,  Werner Reimann

    发明人： Matthias Krull ,  Werner Reimann

    IPC分类号： C10L1/192 ,  C10L1/14 ,  C10L1/195 ,  C10L1/196 ,  C10L1/197 ,  C10L10/18 ,  C10L1/18

    CPC分类号： C10L1/195 ,  C10L1/143 ,  C10L1/1973

    摘要： The invention relates to a process for improving the cold-flow properties of oils having a sulfur content of less than 500 ppm and a content of n-paraffins having a chain length of C.sub.18 or longer of at least 8% by weight, comprising adding an additive comprising a mixture of A) from 15 to 50% by weight of a copolymer comprising, besides from 87 to 92 mol % of structural units derived from ethylene;a) from 6.5 to 12 mol % of structural units derived from vinyl acetate andb) from 0.5 to 6 mol % of structural units derived from 4-methyl-1-pentene, with the proviso that the sum of the molar proportions of structural units a) and b) is from 8 to 14 mol %, and B) from 85 to 50% by weight of at least one further copolymer or terpolymer of ethylene and vinyl esters or acrylates which is per se a cold-flow improver.The invention furthermore relates to an additive for improving the cold-flow behavior of mineral oils and mineral-oil distillates, and to fuel oil compositions containing these additives.

    摘要翻译： 本发明涉及一种改善硫含量小于500ppm的油的冷流特性和链长为C18或更长的正链烷烃含量至少为8重量％的方法，包括加入 添加剂，其包含A）15至50重量％的共聚物的混合物，除了87至92摩尔％的衍生自乙烯的结构单元外， a）6.5-12mol％的衍生自乙酸乙烯酯的结构单元和b）0.5-6mol％的衍生自4-甲基-1-戊烯的结构单元，条件是结构单元的摩尔比例之和 a）和b）为8至14摩尔％，B）为85至50重量％的至少一种乙烯和乙烯酯或丙烯酸酯的另外的共聚物或三元共聚物，本身为冷流改进剂。 本发明还涉及一种用于改善矿物油和矿物油馏出物的冷流行为的添加剂以及含有这些添加剂的燃料油组合物。