共查询到19条相似文献,搜索用时 218 毫秒
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高含蜡石蜡乳状液的研制及影响因素探讨 总被引:2,自引:0,他引:2
以石蜡为主要原料,采用剂在油中法制备了石蜡乳状液.考察了乳化剂类型和用量、乳化水用量、乳化温度、乳化时间、搅拌速度对石蜡乳化效果的影响.结果表明,复配乳化剂优于单一乳化剂,且复配-Ⅱ型乳化剂效果最好.并确定了最佳乳化工艺条件:复配-Ⅱ型乳化剂用量10%,乳化水用量65%~70%,乳化温度90℃,乳化时间30min,搅拌速度1000r/min.在此条件下,石蜡乳状液蜡含量为30%~35%,具有较好的稳定性和分散性. 相似文献
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尿素包合法制取低熔点石蜡的研究 总被引:8,自引:2,他引:6
以市售石蜡为原料用尿素包合法制得了具有合适相变温度 (熔程在 2 6~ 2 6 .6℃ )的石蜡。实验证明影响反应的主次因素依次为包合温度、尿素与石蜡的质量比、反应时间、乙醇与尿素的质量比 ;在反应温度为 70℃、尿素与石蜡的质量比为 3∶1、反应时间为 2 .5h、乙醇与尿素的质量比为 0 .2时 ,得到初熔点为 2 6℃ ,终熔点为 2 6 .6℃的石蜡 ,该石蜡可进一步微胶囊化制成相变材料用于建材中 相似文献
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采用机械搅拌与均质机联用的方法,以58#全精炼切片石蜡为原料进行制备石蜡乳液的实验,考察乳化剂、乳化剂用量、乳化温度、乳化水用量和乳化时间等因素对石蜡乳化效果的影响。实验结果表明,复配乳化剂比单一乳化剂的乳化效果好;对石蜡乳化效果影响大小的顺序是乳化剂用量>乳化温度>乳化水用量>乳化时间;制备石蜡乳液的最佳条件为:m(Span-80)∶m(Tween-80)=2∶3、乳化剂用量9%(w),乳化温度80℃,乳化时间40 min,乳化水用量74%(w),搅拌转速1 000 r/min,在此条件下所得石蜡乳液的平均粒径为1.36μm。 相似文献
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乳化降粘剂SB-2乳化稠油机理研究 总被引:1,自引:1,他引:0
实验研究了用表面活性剂SB 2乳化稠油降低粘度的几个机理性问题。SB 2是胜利油田开发的稠油乳化降粘剂 ,为脂肪酸改性的具有多官能团的钠盐型阴离子表面活性剂。根据用duNo櫣y法测定的表面张力曲线 ,SB 2在蒸馏水中的临界胶束浓度为 0 .16 g/L ,在模拟地层水 (TSD =15 .8g/L ,含Ca2 0 .6 g/L ,含镁 0 .2g/L)中的为0 .0 2 4 g/L。产自胜利油田不同区块 7口井、5 0℃粘度为 3.0× 10 3 ~ 3.3× 10 5mPa·s的稠油 ,与浓度 3~ 8g/L的SB 2地层水溶液在油水体积比 7∶3及一定温度 (5 0~ 70℃ ,视井温而定 )时形成粘度 <30 0mPa·s的O/W乳状液 ,稠油粘度较高时所需的SB 2浓度较高。用ESI MS方法测定了在 5 0℃形成的O/W稠油乳状液水相和油相中SB 2浓度 ,得到下述结果 :在相同稠油和油水比条件下 ,SB 2初始浓度较高时 ,乳状液水相和油相中SB 2浓度也较高 ,粘度不同的 2种稠油与同一浓度SB 2地层水溶液形成的乳状液 ,油水比越大 ,油相中SB 2浓度越小 ,水相中SB 2浓度则相同 ,油水比也相同时SB 2在油相中的浓度也相同。用微量热法测定了一种稠油与SB 2地层水溶液乳化时的热效应 ,乳化过程为放热过程 ,乳化热随水相SB 2浓度、油水比和乳化温度增高而增大。图 6表 1参 6。 相似文献
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为提高非离子型石蜡乳液的覆盖性,先采用非离子型乳化剂吐温-60、司潘-60为主乳化剂乳化58#石蜡制备非离子型石蜡乳液,然后添加助乳化剂十六烷基三甲基溴化铵制备阳-非离子型石蜡乳液。利用单因素法考察了配方组成、乳化时间、乳化温度和搅拌速度对乳液的粒径大小及分布、分散性和稳定性等的影响,确定了水、58#石蜡、吐温-60、司潘-60、十六烷基三甲基溴化铵的最佳用量分别为乳液质量的69.8%,20.9%,6.3%,2.7%,0.3%,得到了最佳制备条件:乳化时间为20 min,乳化温度为95℃,搅拌速度为1300 r/min。该条件下制得的阳-非离子型石蜡乳液的平均粒径0.199μm、固含量31.86%等满足造纸用石蜡乳液的基本要求,可用于造纸工业。 相似文献
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B. Hou 《Petroleum Science and Technology》2007,25(12):1549-1555
With the use of petroleum wax and oxidized petroleum wax as raw material and by appraising and screening emulsifier, the effects on stability of emulsifying wax such as emulsifier type, quantity, stirring speed, emulsifying time, and emulsifying temperature are discussed. The experiment results show that the mass ratio of petroleum wax and oxidized petroleum wax is 15-25%; the mass ratio of mixed emulsifier CC is 7-8%; and the best emulsifying process conditions are an emulsifying temperature of 90°C, an emulsifying time of 40 min, and a stirring speed of 700-1000 r/min. The emulsified wax obtained subsequently has better stability, dispersivity, and property. 相似文献
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Abstract With the use of petroleum wax and oxidized petroleum wax as raw material and by appraising and screening emulsifier, the effects on stability of emulsifying wax such as emulsifier type, quantity, stirring speed, emulsifying time, and emulsifying temperature are discussed. The experiment results show that the mass ratio of petroleum wax and oxidized petroleum wax is 15–25%; the mass ratio of mixed emulsifier CC is 7–8%; and the best emulsifying process conditions are an emulsifying temperature of 90°C, an emulsifying time of 40 min, and a stirring speed of 700–1000 r/min. The emulsified wax obtained subsequently has better stability, dispersivity, and property. 相似文献
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The mesoporous molecular sieve catalyst Co/SBA-15 was synthesized by two steps synthesis method, based on which oxidized wax was prepared. The emulsification of oxidized wax was carried out by employing Span-80, Tween-80, and stearic acid as compound emulsifier. The results showed that when the mass ratio of Span-80, Tween-80, and stearic acid was 5.5:3.6:0.9, emulsifying temperature was 75°C, emulsifying time was 55 min, emulsifier amount was 7.3%, and water consumption was 69.96%. The emulsion performance of oxidized wax was improved greatly compared with ordinary paraffins. 相似文献
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以尿素、甲醛、低熔点蜡为原料,采用原位聚合法制备微胶囊相变材料。采用SEM,DSC,FT-IR测试仪器分别测定微胶囊表面形态、热性能、化学成分;采用激光粒径分布仪测定微胶囊的平均粒径及粒径分布,讨论了微胶囊粒径的影响因素。实验结果表明,当尿素-甲醛预聚体与低熔点蜡质量比为2:1时,采用Span60和Tween60质量比为6∶4的复合乳化剂,在乳化搅拌速度13000r/min下乳化8min,缓慢分批加入NH4Cl催化剂,控制终点pH值为1.5~2.0,在60℃下反应4h,升温到90℃并恒温1h可以得到平均粒径20μm左右、粒径分布在10~30μm的球形微胶囊。DSC显示微胶囊熔点为35.14℃,潜热为104.19J/g。 相似文献
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国内乳化蜡的研究及应用进展 总被引:10,自引:1,他引:9
介绍了乳化石蜡的类型及制备方法,讨论了乳化剂、乳化温度、乳化时间及搅拌速率对乳化蜡稳定性的影响;评述了乳化蜡在国内纺织工业、人造板工业、造纸工业、上光剂、农业及乳化炸药等行业的研究及应用进展;分析了国内乳化蜡的市场前景,指出中国发展乳化蜡的方向是实现产品的系列化和规模化。 相似文献
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通过对石蜡乳化过程的分析,提出节能乳化和剂相乳化概念,并综合为一种用于制备石蜡微小乳化液的新型乳化过程“节能型剂相乳化法”,与传统的乳化方法相比,该法一般能节约乳华石蜡能量的44%以上。 相似文献
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Wax emulsions were prepared by using paraffin wax and oxidized wax as raw materials, compound Wb-L as emulsifier, and C5 petroleum resin as stabilizer. Its performance was studied. The results showed that when M C5 petroleum resin r/M wax and oxidized wax = 0.20, M emulsifier/M wax and oxidized wax = 0.50, M water/M wax and oxidized wax = 2.50, emulsifying time was 30 min, emulsifying temperature was 90–95°C, and stirring speed was 1,100 r/min, wax emulsions with good stability, dispersibility, and monodisperse particle size were obtained, giving a preservative solution in pencil board production. 相似文献