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    • 107. 发明授权
    • Preparation of antiplasticizers for thermoplastic polyesters
    • 制备热塑性聚酯的抗增塑剂
    • US08692013B2
    • 2014-04-08
    • US13684541
    • 2012-11-25
    • Rick TaborBrian K. MirousTimothy L. LambertMichael E. O'BrienMatthew I. LevinsonDaniel J. Dershowitz
    • Rick TaborBrian K. MirousTimothy L. LambertMichael E. O'BrienMatthew I. LevinsonDaniel J. Dershowitz
    • C07C69/76
    • C08K5/1345C07C67/03C07C67/29C07C69/82C08K5/12Y02P20/582
    • A process for making bis(aryloxyalkyl)terephthalates useful as antiplasticizers for thermoplastic polyesters is disclosed. Dimethyl terephthalate is reacted with an excess of an aryloxyalkanol in the presence of a condensation catalyst to produce an intermediate mixture comprising a bis(aryloxyalkyl)terephthalate, a mono(aryloxyalkyl)terephthalate, and unreacted aryloxyalkanol. This mixture continues to react at reduced pressure while unreacted aryloxyalkanol is removed and the mono-ester content is reduced to less than 1 mole % based on the combined amounts of mono- and bis-esters. Both steps are performed substantially in the absence of oxygen. Additional unreacted aryloxyalkanol is then removed to provide a purified bis(aryloxyalkyl)terephthalate having an overall purity of at least 98 mole % and a yellowness index less than 10. Careful control over catalysis, exposure to air, and other process conditions enables the preparation of high yields of bis(aryloxyalkyl)terephthalates that have low color and other valuable attributes. A method of producing bis(aryloxyalkyl)terephthalate articles having improved compressive strength is also disclosed.
    • 公开了一种制备用作热塑性聚酯的抗增塑剂的双(芳氧基烷基)对苯二甲酸酯的方法。 在缩合催化剂的存在下,对苯二甲酸二甲酯与过量的芳氧基烷醇反应,以产生包含双(芳氧基烷基)对苯二甲酸酯,单(芳氧基烷基)对苯二甲酸酯和未反应的芳氧基烷醇的中间体混合物。 该混合物在减压下继续反应,同时除去未反应的芳氧基烷醇,并且基于单酯和双酯的组合量,单酯含量降低至小于1摩尔%。 两个步骤基本上在不存在氧的情况下进行。 然后除去另外的未反应的芳氧基烷醇,以提供纯度为至少98摩尔%,黄度指数小于10的纯化双(芳氧基烷基)对苯二甲酸酯。小心控制催化,暴露于空气和其它工艺条件使得能够制备 具有低颜色和其他有价值属性的双(芳氧基烷基)对苯二甲酸酯的高收率。 还公开了一种制备具有改善的抗压强度的双(芳氧基烷基)对苯二甲酸酯制品的方法。
    • 108. 发明申请
    • SURFACTANTS FOR ENHANCED OIL RECOVERY
    • 用于增强油回收的表面活性剂
    • US20140073541A1
    • 2014-03-13
    • US14115865
    • 2012-05-14
    • Ramakrishna RavikiranJieyuan Zhang
    • Ramakrishna RavikiranJieyuan Zhang
    • C09K8/584
    • C09K8/584
    • Surfactant compositions useful for oil recovery comprise from 10 to 80 wt. % of a prapoxylated C12-C20 alcohol sulfate, from 10 to 80 wt. % of a C12-C20 internal olefin sulfonate, and from 0.1 to 10 wt. % of an ethoxylated C4-C12 alcohol sulfate. A minor proportion of the ethoxylated alcohol sulfate reduces or eliminates the need to rely on costly cosolvents for achieving good performance in enhanced oil recovery processes. Low interfaoial tensions and low microemulsion viscosities can be achieved when the ethoxylated alcohol sulfate accompanies the propoxytated alcohol sulfate and internal olefin sulfonate. Aqueous concentrates comprising water and the surfactant compositions described above are also disclosed. Dilution of the surfactant composition or aqueous concentrate with water or brine to the desired anionic actives level provides an injectable composition useful for EOR applications. Stable, low-viscosity oil-in-water microemulsions comprising crude oil, water, and the surfactant compositions are also disclosed.
    • 用于油回收的表面活性剂组合物包含10至80wt。 %丙二酸化的C 12 -C 20醇硫酸盐,10至80重量% %的C 12 -C 20内烯烃磺酸盐,和0.1至10wt。 %的乙氧基化C4-C12醇硫酸盐。 少量的乙氧基化醇硫酸盐减少或消除了在增强的油回收方法中获得良好性能的需要,依赖于昂贵的助溶剂。 当乙氧基化醇硫酸盐伴随丙氧基醇硫酸盐和内部烯烃磺酸盐时,可以实现低内在张力和低微乳液粘度。 还公开了包含水和上述表面活性剂组合物的水性浓缩物。 将表面活性剂组合物或含水浓缩物用水或盐水稀释至所需的阴离子活性物质水平,提供了可用于EOR应用的可注射组合物。 还公开了包含原油,水和表面活性剂组合物的稳定的低粘度水包油微乳液。