会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 5. 发明授权
    • Deoiling of aqueous solutions of sodium lauryl sulfate
    • 十二烷基硫酸钠水溶液的脱胶
    • US4322367A
    • 1982-03-30
    • US97520
    • 1979-11-26
    • Salvatore J. Silvis
    • Salvatore J. Silvis
    • B01D3/08B01D3/16B01D3/20B01D3/40C07C303/44C07C305/06C07C141/04
    • B01D3/08B01D3/16B01D3/20B01D3/40C07C303/44Y02P20/582
    • Free oil, often an objectionable impurity in synthetic organic detergents, such as sodium lauryl sulfate, is removed from aqueous solutions by extraction thereof with hexane in the presence of lower alkanol, with the proportion of the alkanol present being in a relatively narrow range with respect to the sodium lauryl sulfate, in which range it helps to promote efficient extraction of the free oil by the hexane without solubilizing the hexane in the aqueous medium to such an extent as to result in an extracted detergent containing an unacceptably high proportion of hexane. Separation of the free oil from the aqueous detergent solution is effected in an extractor, to which the hexane is added, in mixture with a minor proportion of lower alkanol, normally isopropanol, and extraction of the free oil takes place after a preliminary mixing of isopropanol with detergent acid or neutralized base in a neutralization vessel and/or in a mixer upstream of the extractor. In a preferred embodiment of the invention the hexane extractant feed to the extractor is that resulting from distillation separation from the free oil of the hexane with some isopropanol. Also, extracted product is evaporated and the evaporator overhead, including isopropanol, hexane and water, is fed to the mixer. The evaporator product is steam stripped, very preferably in a novel stripper described herein, and the stripper overhead, including isopropanol and water, is conveniently fed to a neutralization vessel in which detergent acid, comprising the product of sulfation of lauryl alcohol with sulfur trioxide (and containing objectionable free oil), is neutralized with aqueous sodium hydroxide. Preferably the deoiling process is a continuous one, with only free oil being removed from the extractor feed, and the hexane and isopropanol are continuously recycled.
    • 在低级链烷醇存在下,通过用己烷萃取,从水溶液中除去合成有机洗涤剂(如十二烷基硫酸钠)中常见的有害杂质,其中存在的链烷醇的比例在相对较窄的范围内,相对于 对于十二烷基硫酸钠,其范围有助于促进己烷在游离油中的有效萃取,而不会将己烷溶解在水性介质中,达到导致含有不可接受的高比例己烷的萃取洗涤剂。 游离油与水性洗涤剂溶液的分离在与少量的低级链烷醇(通常是异丙醇)的混合物的萃取器中进行,其中加入己烷,与丙酮的预混合进行游离油的萃取 在中和容器中和/或在萃取器上游的混合器中用洗涤剂酸或中和的碱。 在本发明的一个优选实施方案中,向提取器提供的己烷萃取剂进料是由与己烷的游离油与一些异丙醇进行蒸馏分离产生的。 此外,蒸发萃取的产物,并将蒸发器塔顶馏出物(包括异丙醇,己烷和水)进料到混合器中。 蒸发器产品被蒸汽汽提,非常优选在本文所述的新型汽提器中,并且包括异丙醇和水的汽提器顶部物质方便地进料到中和容器中,其中包含月桂醇与三氧化硫的硫酸化产物的洗涤剂酸 并含有令人反感的游离油)用氢氧化钠水溶液中和。 优选地,脱油方法是连续的,只有游离油从萃取器进料中除去,并且己烷和异丙醇被连续再循环。