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Antioxidative efficiency of novel β-naphthol derivatives in storage assays of cracked naphtha

机译:新型β-萘酚衍生物在裂化石脑油储存分析中的抗氧化效率

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摘要

The types of hydrocarbons found in gasoline have great influence on the formation of gum (nonvolatile, insoluble, adhesive resin that forms sediments within fuel systems of an engine). In this study, the synthetic compound β-naphthol has been used in order to generate novel antioxidative substances: AO1 [6-N-ethyl,N-ethylamino)β-naphthol], AO2 [6-N-ethyl,N-diethylamino)-β-naphthol] and AO3 [mixture of amino-β-naphthol and 1,6-di-amino-β-naphthol]. The derived compounds were subjected to accelerated oxidative stability assays [potential gum (PG) and induction period (IP)] and to storage assays [washed gum (WG) and ASTM color] during six months with cracked naphtha provided by the petroleum refinery RPBC (Presidente Bernardes Refinery, in Cubatao, Brazil). During the PG and IP assays, the experimental amine mixture AO3 and the commercial product known as PDE were highlighted as good oxidation inhibitors, yielding average values of 39.15 mg/100 ml and 637 min, respectively. After the storage period, a better antioxidant behavior was observed for the experimental compound AO2, which provided an average WG value of 6.1 mg/100 ml.
机译:汽油中发现的碳氢化合物类型对口香糖(不挥发的,不溶性的,粘合性树脂,会在发动机的燃料系统内形成沉淀物)的形成产生很大影响。在这项研究中,已使用合成化合物β-萘酚来生成新型抗氧化物质:AO1 [6-N-乙基,N-乙基氨基)β-萘酚,AO2 [6-N-乙基,N-二乙基氨基] -β-萘酚]和AO3 [氨基-β-萘酚和1,6-二氨基-β-萘酚的混合物]。使用石油精炼厂RPBC提供的裂化石脑油在六个月内对衍生化合物进行加速的氧化稳定性测定[潜在的胶(PG)和诱导期(IP)],并进行储存测定[洗涤的胶(WG)和ASTM颜色](总统Bernardes炼油厂,位于巴西Cubatao)。在PG和IP分析过程中,突出显示了实验性胺混合物AO3和称为PDE的商业产品是良好的抗氧化剂,其平均值分别为39.15 mg / 100 ml和637 min。储存期后,观察到实验化合物AO2的抗氧化性能更好,其平均WG值为6.1 mg / 100 ml。

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