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化工四 B95504052 林文翔 B95504050 劉邦彥 B95504048 彭子軒 Picture is modified and form ref.2.

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Presentation on theme: "化工四 B95504052 林文翔 B95504050 劉邦彥 B95504048 彭子軒 Picture is modified and form ref.2."— Presentation transcript:

1 化工四 B95504052 林文翔 B95504050 劉邦彥 B95504048 彭子軒 Picture is modified and form ref.2

2 Synthesis of DMDCS Method1. Grinard method CH 3 MgCl+SiCl 4 → (CH 3 )SiCl 3 +MgCl 2 CH 3 MgCl+CH 3 SiCl 3 → (CH 3 ) 2 SiCl 2 +MgCl 2 Drawbacks: 1. Process isn’t selective. 2. Getting pure products by distillation of 120 plate columns. 3. Grignard reagent is expensive. Picture is form ref.2

3 Synthesis of DMDCS Method2. Direct method(1940-1945 Rochow @ G.E.) 2CH 3 Cl + Si/Cu 2 O → (CH 3 ) 2 SiCl 2 Advantages: 1. Simple 2. High purity and less cost. Furnace 370 ˚C M=CH 3 Cl Condenser

4 Flow chart Picture is modified and form ref.2 Discharge &preheat Recycle Mixed product

5 Cyclone separator Feed Si Output Feed Si Output Picture is modified and form ref.5

6 Fluid Energy Jet Mill Feed Crushing Classifying Picture is modified and form ref.3

7 Products Recycle material: Methyl chloride 1. CH 3 Cl -24.2 ˚C [4] Main product: Methylchlorosilanes 1. (CH 3 ) 2 SiCl 2 70˚C 2. CH 3 SiCl 3 65.7˚C 3. (CH 3 ) 3 SiCl57.3˚C Many other byproducts (only 1%): 1. Disilanes (CH 3 ) 3 Si 2 (CH 3 ) 3 113˚C [4] 2. Silaalkanes Cl 3 SiCH 2 SiCl 3 179.5˚C [4] 3. Siloxanes C 6 H 18 OSi 2 101˚C [4] 4. Hydrocarbons C 2 H 6 -88.6˚C [4]

8 Separation by fractional distillation Picture is modified and form ref.2

9 Future work Reactor of Rochow synthesis

10 References 1.ROCHOW, E., The Direct Synthesis of Organosilicon Compounds. 1945. 2.Seyferth, D., Dimethyldichlorosilane and the Direct Synthesis of Methylchlorosilanes. The Key to the Silicones Industry. 2001,p 8-14 Massachusetts Institute of Technology. 3. http://www.nisshineng.com/eng/index.html Fluid energy jet mill. 4. http://www.wolframalpha.comhttp://www.wolframalpha.com 5. Coulson,Richardson’s Chemical Engineering p.50


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