共查询到18条相似文献,搜索用时 640 毫秒
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对我国石油蜡的生产、应用现状进行了论述,在此基础上通过具体产品介绍,引出对石油蜡深加工问题的讨论。认为我国应加快发展石油蜡深加工产品 相似文献
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上光剂用蜡原料 总被引:1,自引:0,他引:1
王明娟 《精细与专用化学品》2000,8(20):7-9
蜡是上光剂中的主体原料,本文概括了上光剂对蜡原料的性能要求,基于天然蜡的产量与质量局限性,同时还重点描述了合成蜡和改性蜡的特性与作用。 相似文献
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对天然蜡和合成蜡酸值测定方法进行了探讨,填补了国内标准的空白。利用无毒的混合溶剂(95%乙醇与120号溶剂油体积比为1∶4)代替了二甲苯,不但降低了对人体的危害,而且该方法适用范围广,测定结果标准偏差低。考察了取样量、溶剂量及指示剂量对酸值测定的影响,实验结果表明,取样量对酸值较大的样品的结果影响较小,溶剂量对酸值测定影响不大,指示剂量对酸值较大的样品的分析结果影响较小,该方法重复性好,精密度高。 相似文献
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《中国石油和化工标准与质量》2014,(11)
油井结蜡现象在油田开发过程中,是经常会出现的问题。由于结蜡现象的存在,导致了油井产量的下降。油井在开发过程中,结蜡的原因通常与工况中的温度、压力以及介质的流速、原油的成分有关。在我国对结蜡的预防方法中,以对油井的清洗最为常用。其中包括了机械清洗技术、化学药物清洗技术、热力预防技术以及磁防技术等多种。笔者通过对结蜡技术的了解,提出了相关技术及建议,为提高对石蜡的清洗及预防效果,提升油田的产率,有一定积极意义。 相似文献
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深入分析了国内外石蜡、微晶蜡、特种蜡现状,针对我国石蜡生产,对特种蜡产品开发提出了一些建议,提高石蜡附加值的同时提升企业的竞争力和经济效益。 相似文献
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Jill K. Winkler-Moser Julie Anderson Jeffrey A. Byars Mukti Singh Hong-Sik Hwang 《Journal of the American Oil Chemists' Society》2019,96(11):1235-1248
Four natural waxes were evaluated as stabilizers in peanut butter. The potential advantage of using natural waxes would be the replacement of current stabilizers such as hydrogenated or tropical oils, thereby reducing saturated fats and satisfying clean label requirements. Beeswax (BW), candelilla wax (CLW), rice bran wax (RBW), sunflower wax (SFW), and a commercial peanut butter stabilizer, hydrogenated cottonseed oil (HCO), were added to three natural peanut butter brands at levels ranging from 0.5% to 2.0% (w/w) and tested for accelerated oil release, long-term stability, firmness, and rheology. At levels ≥0.5%, all waxes improved oil-binding capacity (OBC). SFW and HCO had the highest OBC, followed by RBW, CLW, and BW. All waxes reduced the amount of oil separation after 6 months at 22 ± 2 °C. HCO followed by SFW reduced oil separation the most, but there were no significant differences between stabilizers at 1–2%. Firmness and yield stress increased with increasing stabilizer level, with SFW increasing firmness the most, followed by HCO, RBW, and CLW, while BW had the lowest effect. The results indicate that the waxes may be feasible replacements for hydrogenated oils as peanut butter stabilizers, but levels would need to be optimized depending on the product characteristics and wax type. 相似文献
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石蜡细小乳状液的制备 总被引:1,自引:0,他引:1
以吐温60、司本60以及两种助表面活性剂作乳化剂,应用HLB理论制得0/W型稳定石蜡细小乳状液。其中石蜡20.0分、吐温60为1.6分、司本60为1.4分、两种助表面活性剂共2.0分、余量为水(质量水)。经激光粒度分析仪检测该乳状液平均粒径为0.682um。而仅用吐温60、司本60作乳化剂,只制得石蜡普通乳状液。 相似文献
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Wool wax and certain wool wax derivatives are investigated as regards their effect on the rheological behaviour of a hydrocarbon ointment base (vaseline). The rheological parameters considered are: flow pattern, structural viscosity, yield value, plastic viscosity, coefficients B and M of thixotropic breakdown and structural recovery. Evidence is provided for marked changes of the rheological characteristics of the system in presence of any of the investigated materials. A discussion of the different effects is presented. 相似文献