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METHOD OF DETERMINING PRESENCE OF DEPRESSOR ADDITIVE IN DIESEL FUELS
METHOD OF DETERMINING PRESENCE OF DEPRESSOR ADDITIVE IN DIESEL FUELS
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机译：柴油中降压添加剂的含量测定方法
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摘要
FIELD: qualification test and identification of hydrocarbon fuels.;SUBSTANCE: invention relates to testing of fuels, particularly, to methods of revealing depressor additives. According to proposed method, initial fuel congelation temperature tc in is determined after which sample is heated in flask with outlet tube, current temperature of vapors in flask neck is measured and heating is stopped when white vapors appear in flash neck at simultaneous drop of vapor temperature and no drops getting from flask outlet tube. Then temperature of flask with remaining fuel is reduced to room temperature, distilled part of fuel is mixed with fuel left in flask and mixture congelation temperature tc mix is determined, and presence of depressor additive in sample is indicated by rise of mixture congelation temperature as compared with initial sample congelation temperature. Physical sense of mixture congelation temperature rise (mixture of distilled part of sample and fuel remaining in flask) is that depressor additive, being polymeric compound, remains in flask in process of distilling where is it decomposes (cracks) at temperatures specific foe end of distilling process (320-365oC according to thermometer in flask neck)and, consequently, its influence stops. Invention makes it possible to detect depressor additives in diesel fuels without decreasing requirements to reliability of process.;EFFECT: reduced cost of tests.;1 ex, 1 dwg
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机译：技术领域本发明涉及燃料的测试，尤其涉及显示降压剂添加剂的方法。根据提出的方法，确定初始燃料胶凝温度t c in ，然后在带有出口管的烧瓶中加热样品，测量烧瓶颈中当前的蒸汽温度，并在出现白色蒸汽时停止加热。蒸气温度同时下降时闪颈，烧瓶出口管无液滴。然后将剩余燃料的烧瓶温度降至室温，将燃料的蒸馏部分与烧瓶中剩余的燃料混合，确定混合物的凝结温度t c mix ，并指示样品中存在降压添加剂与初始样品的凝结温度相比，混合物的凝结温度升高。混合物凝结温度升高的物理感觉（样品的蒸馏部分和烧瓶中残留的燃料的混合物）是作为聚合化合物的降压添加剂在蒸馏过程中保留在烧瓶中，在蒸馏的特定温度下会分解（破裂）。过程（根据烧瓶颈部的温度计确定温度为320-365 o C），因此其影响停止了。本发明使得在不降低对工艺可靠性的要求的情况下检测柴油中的降压添加剂成为可能。效果：降低了测试成本; 1 ex，1 dwg
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