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    • 1. 发明授权
    • Catalyst composition and method for selective dehydrogenation
    • 催化剂组合物和选择性脱氢方法
    • US4798911A
    • 1989-01-17
    • US75375
    • 1987-07-20
    • Carl M. LentzBruce L. GustafsonPaul S. Wehner
    • Carl M. LentzBruce L. GustafsonPaul S. Wehner
    • B01J23/89C07B35/04C07B61/00C07C5/00C07C5/32C07C5/333C07C11/02C07C37/06C07C39/15C07C41/18C07C43/215C07C45/65C07C47/548C07C49/794C07C51/347C07C63/64C07C69/76C07C69/94C07C317/14C07C5/367C07C39/12
    • C07C41/18B01J23/8926C07C37/001C07C37/06C07C5/325C07C5/3337C07C67/297C07C67/317C07C2101/14C07C2521/18C07C2523/44C07C2523/72C07C2523/89
    • A method for selective dehydrogenation of a compound, comprising contacting a compound of the formula ##STR1## wherein each R.sup.1, R.sup.2, R.sup.3 and R.sup.4 is independently selected from the group consisting of H, (C.sub.1 -C.sub.20) alkyl, (C.sub.3 -C.sub.20) cycloalkyl, (C.sub.6 -C.sub.20) aryl, (C.sub.7 -C.sub.20) alkylaryl, (C.sub.7 -C.sub.20) aralkyl groups, as well as substituted (C.sub.1 -C.sub.20) alkyl, (C.sub.3 -C.sub.20) cycloalkyl, (C.sub.6 -C.sub.20) aryl, (C.sub.7 -C.sub.20) aralkyl and (C.sub.7 -C.sub.20) arylalkyl moieties, optionally further substituted with --OR, wherein R is R.sup.1, R.sup.2, R.sup.3 or R.sup.4 ; and wherein R.sup.1 and R.sup.2 or R.sup.3 and R.sup.4 may be joined as part of a ring structure, at a dehydrogenation temperature in the presence of a catalyst comprising about 0.01 wt %-19.9 wt % Pd and about 0.01 wt %-19.9 wt % Cu on a carbon support, wherein the total amount of (Pd+Cu) on the support is about 0.02 wt % to 20 wt %, the weight ratio of Pd:Cu is about 1:1 to 10:1, and the carbon support has a surface area of at least about 100 m.sup.2 /g and is essentially free of reactive sulfur.A selective dehydrogenation catalyst having the composition described supra is disclosed as is a method of preparing the same. This catalyst is highly selective for dehydrogenating a variety of substrates while minimizing the formation of unwanted hydrogenolysis by-products.
    • 一种化合物的选择性脱氢的方法,包括使下式化合物与其中每个R 1,R 2,R 3和R 4独立地选自H,(C 1 -C 20)烷基,(C 3 -C 20) 环烷基,(C 6 -C 20)芳基,(C 7 -C 20)烷基芳基,(C 7 -C 20)芳烷基以及取代的(C 1 -C 20)烷基,(C 3 -C 20)环烷基,(C 6 -C 20) C7-C20)芳烷基和(C7-C20)芳烷基部分,任选进一步被-OR取代,其中R是R 1,R 2,R 3或R 4; 并且其中R 1和R 2或R 3和R 4可以作为环结构的一部分在脱氢温度下在催化剂存在下接合,所述催化剂包含约0.01重量%-19.9重量%的Pd和约0.01重量%-19.9重量%的Cu 碳载体,其中载体上的(Pd + Cu)的总量为约0.02重量%至20重量%,Pd:Cu的重量比为约1:1至10:1,并且碳载体具有 表面积至少约100m 2 / g,基本上不含活性硫。 作为其制备方法,公开了具有上述组成的选择性脱氢催化剂。 该催化剂对于使各种底物脱氢而具有高选择性,同时最小化不想要的氢解副产物的形成。
    • 5. 发明申请
    • COLOR-CHANGING EMULSIONS FOR FREEZE INDICATORS
    • 冷冻指示剂的颜色变化乳液
    • US20120079980A1
    • 2012-04-05
    • US13246392
    • 2011-09-27
    • Dene H. TAYLORCarl M. LentzDawn E. Smith
    • Dene H. TAYLORCarl M. LentzDawn E. Smith
    • G01D21/00G01N21/75
    • G01K11/12G01K3/04G01K11/06
    • A color-changing emulsion for use in a freeze indicator can employ a dispersion medium, for example, an aqueous liquid, a first reactant phase and a second reactant phase, which two reactant phases can both be dispersed in the dispersion medium. The first reactant phase includes a hydrophobic liquid and a first reactant, for example, a color precursor such as a leuco dye. The second reactant phase can include a hydrophobic liquid, and includes, or can be, a second reactant, for example, a color developer such as a leuco dye developer. The first and second reactant phases can be essentially unmixed, and can be co-reactable to provide a color change. In response to a freezing temperature, the color-changing emulsion can coagulate and change color irreversibly. An intense color change can be obtained by using, for example, a suitable leuco dye precursor and developer.
    • 用于冷冻指示剂的变色乳液可以使用分散介质,例如水性液体,第一反应物相和第二反应物相,其中两个反应物相都可以分散在分散介质中。 第一反应物相包括疏水性液体和第一反应物,例如着色前体如无色染料。 第二反应物相可以包括疏水性液体,并且包括或可以是第二反应物,例如彩色显影剂,例如无色染料显影剂。 第一和第二反应物相可以基本上不混合,并且可以共同反应以提供颜色变化。 响应于冷冻温度,变色乳液可以不可逆地凝结和变色。 通过使用例如合适的无色染料前体和显影剂可以获得强烈的颜色变化。