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    • 5. 发明公开
    • 메틸벤젠류 부분산화용 촉매의 제조방법
    • 制备用于部分氧化甲基苯的催化剂的方法
    • KR1020080058099A
    • 2008-06-25
    • KR1020060132215
    • 2006-12-21
    • 주식회사 엘지화학
    • 이원호이동일박인규채종현윤현경손지향이원재
    • B01J23/30B01J37/02
    • B01J23/30B01J21/04B01J37/0036B01J37/0221B01J37/036
    • A method of preparing a catalyst for partial oxidation of methylbenzenes is provided to lower the reaction temperature based on the equal yield in the production of corresponding aromatic aldehydes from methylbenzenes. A method of preparing a catalyst for partial oxidation of methylbenzenes comprises the steps of: (a) producing tungsten oxide by a sol-gel process; (b) preparing a tungsten oxide slurry by a wet milling process; (c) doping the prepared slurry on an inorganic carrier to obtain a catalyst; (d) drying the obtained catalyst; and (e) firing the dried catalyst, wherein the step(a) comprises treating tungsten acid with hydrogen peroxide, and wherein the catalyst for partial oxidation of methylbenzenes is represented by the formula, WOx, where W denotes a tungsten atom, O denotes an oxygen atom, and x is a value determined by the oxidation state of W. The step(a) comprises: a first step of treating tungsten acid with hydrogen peroxide; a second step of dispersing a resulting material of the first step into a dispersion medium to produce a sol; and a third step of gelling the sol obtained in the second step. The first step comprises the steps of dissolving tungsten acid into hydrogen peroxide to prepare a solution, and decomposing a non-reacted hydrogen peroxide contained in the solution using a platinum mesh. Further, the dispersion medium is water, alcohol or a mixture thereof.
    • 提供一种制备用于甲基苯部分氧化的催化剂的方法,以便在从甲基苯生产相应的芳族醛的同等产率下降低反应温度。 制备甲基苯部分氧化催化剂的方法包括以下步骤:(a)通过溶胶 - 凝胶法生产氧化钨; (b)通过湿磨法制备氧化钨浆料; (c)将制备的浆料掺杂在无机载体上以获得催化剂; (d)干燥得到的催化剂; 和(e)焙烧干燥的催化剂,其中步骤(a)包括用过氧化氢处理钨酸,并且其中用于部分氧化甲基苯的催化剂由式WO x表示,其中W表示钨原子,O表示 氧原子,x是通过W的氧化态确定的值。步骤(a)包括:用过氧化氢处理钨酸的第一步骤; 将所得第一步的材料分散到分散介质中以产生溶胶的第二步骤; 以及在第二步骤中获得的胶体凝胶化的第三步骤。 第一步包括将钨酸溶解到过氧化氢中以制备溶液并使用铂网分解溶液中所含的未反应的过氧化氢的步骤。 此外,分散介质是水,醇或其混合物。
    • 8. 发明公开
    • 테레프탈알데히드의 정제방법
    • 净化对苯二甲醛的方法
    • KR1020060086196A
    • 2006-07-31
    • KR1020050007156
    • 2005-01-26
    • 주식회사 엘지화학
    • 윤현경이원호채종현이동일
    • C07C67/52
    • C07C45/81C07C47/544
    • 본 발명은 불순물을 포함하는 테레프탈알데히드 결정을 안티솔벤트(anti-solvent)를 사용하여 재결정하여 고순도의 테레프탈알데히드를 제조하는 방법에 관한 것이다. 본 발명은 통상의 제조공정을 통해 얻어진 테레프탈알데히드 및 소량의 불순물들을 함유한 저순도 테레프탈알데히드를 용매에 용해시킨 후, 안티솔벤트로 물을 사용하여 재결정화하여 고순도의 테레프탈알데히드를 제조하는 방법에 관한 것으로, 안티솔벤트로 물만을 사용한다는 점에서 상당한 이점이 있으며, 또한 단시간 내에 간단하게 정제할 수 있다는 장점을 가지는 경제적이며 친환경적인 기술이다.
      테레프탈알데히드, 안티솔벤트(anti-solvent), 재결정
    • 含有杂质,使用抗溶剂(反溶剂)本发明中重结晶对苯晶体涉及一种用于制备高纯度对苯二甲醛的方法。 本发明是对苯二甲醛溶解和含有杂质的低纯度少量对苯二甲醛由以往的制造方法在溶剂中获得的,一种用于使用水作为反溶剂重结晶制备高纯度对苯二 即,有一个显著优点在于,它使用水作为唯一的抗溶剂,而且经济和环保的技术具有的优点是它可以在很短的时间周期被容易地纯化。