共查询到17条相似文献,搜索用时 187 毫秒
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阐述了两种精炼工艺(常规精炼工艺和混合油精炼工艺)的工艺流程及控制要点,并将两种工艺生产的成品棉籽油的各项指标进行对比分析。与常规精炼工艺相比,混合油精炼得到的成品棉籽油色泽R值低1.5~2.5,酸值(KOH)低0.08 mg/g,含皂量低0.015个百分点,皂脚含油低10~20个百分点,精炼得率提高2~6个百分点。混合油精炼工艺在新疆棉籽油生产加工中的应用具有精炼得率高、成品油色泽浅、动力消耗低、维护费用低等优势,解决了新疆棉籽高棉酚含量对棉籽油生产加工的不利影响,更适合于新疆棉籽油的加工。 相似文献
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为确保棉籽油的稳定生产,提高棉籽油的品质,以混合油浓度、超量碱添加量、碱液质量分数和反应时间为试验因素,以棉籽油的含皂量、色泽(R值)和精炼得率为考察指标,设计正交试验对棉籽混合油碱炼工艺条件进行优化。结果表明,棉籽混合油碱炼的最优工艺条件为混合油浓度85%,超量碱添加量0.8%,碱液质量分数12.69%(18°Bé),反应时间20 min。在最优工艺条件下,生产线上实际生产的棉籽油酸值(KOH)降到0.2 mg/g以下,过氧化值降到0.020 g/100 g,色泽(R值)可稳定控制在4.8以下,精炼得率为95.92%,优于小试试验效果。 相似文献
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阐明了棉籽混合油碱炼的优越性,着重介绍了目前我国棉籽混合油连续碱炼的工艺过程及主要操作,简要说明了该工艺采用主要设备的结构及应用特性。 相似文献
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介绍了棉籽中棉酚的存在与性质,以及棉酚在棉籽油生产过程中可能发生的变化及影响。在毛油制取过程中采用润湿蒸炒,加稀碱液蒸炒,湿式膨化等预处理工序都可有效降低毛油中棉酚含量并提高粕的品质。碱炼是公认的脱除棉酚最有效的方法,但炼耗较高。在脱除棉酚和磷脂后棉籽油也可以进行物理精炼,并可获得良好的工艺效果。提出了在棉籽油中加入适量的邻氨基苯甲酸,再结合其他工序脱除棉酚的方法。 相似文献
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A technologically feasible cottonseed oil-isopropyl alcohol (IPA) miscella refining process was developed to produce Prime Bleachable Summer Yellow (PBSY) quality cottonseed oil. Individual steps necessary to refine cottonseed oil-IPA miscella were determined and improved. The miscella was first neutralized with 20 Baume (Be') caustic solution (50% excess) using a homogenizer. After centrifugation to remove soapstock, the two remaining liquid layers were separated and desolventized. The refined oils from bottom and top layers were then water washed using 12.5 and 20% hot water (w/w), respectively. Water washing efficiently recovered the oil from the top miscella layer and reduced soap and phosphorus contents. The water washed and dried oil from the bottom and top layers were treated with 0.5 and 4% (w/w) acid-activated bleaching clay, respectively. Good quality bleached oil was then obtained. However, the quality of bleached oil produced from the bottom layer was better than that of the top layer. Comparative experiments with both IPA and hexane miscellas showed that quality of the refined oil from cottonseed oil-IPA miscella is as good as that produced from the cottonseed oil-hexane miscella using the process developed in this study. 相似文献
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在棉籽混合油精炼过程中,防爆碟片离心机是主要的设备。为了保障防爆碟片离心机稳定、安全运行,结合生产实践对防爆碟片离心机购置、安装和使用的注意事项进行了介绍,如:采购的防爆离心机要采用电机能耗制动,配置充氮、测氧、测振等保护设施,安装时要考虑管线密封、接地和安装防爆振动烈度仪,使用过程中采用PLC系统时时监控等。 相似文献
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M. Attia F. S. Taha H. M. Mustafa A. S. El-Nockrashy 《Molecular nutrition & food research》1988,32(3):281-284
Bench-scale refining of crude colour-fixed cottonseed oil was carried out using equipment and conditions similar to those at a local factory. Ethanolamine at 2–3% level resulted in 55–62% reduction in the oil colour, and 24–26% reduction in the refining loss over the factory treated oil. Sodium silicate at 0.14–0.47% level resulted in about 50% reduction in oil colour and 24–44% reduction in the refining loss. A two-step treatment, first with caustic soda lye then with either additives, and miscella refining using ethanolamine as an additive, resulted in superior oil colour, yet the refining losses were high. 相似文献