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Date: 11-9-2017
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Date: 18-8-2017
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Date: 11-9-2017
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1,3-Propanediol
1,3-Propanediol is a colorless liquid that boils at 210–211°C. It is soluble in water, alcohol, and ether. It is an intermediate for polyester production. It could be produced via the hydroformylation of ethylene oxide which yields 3-hydroxypropionaldehyde. Hydrogenation of the product produces 1,3-propanediol.
The catalyst is a cobalt carbonyl that is prepared in situ from cobaltous hydroxide, and nonylpyridine is the promotor. Oxidation of the aldehyde produces 3-hydroxypropionic acid. 1,3-Propanediol and 3 hydroxypropionic acid could also be produced from acrolein.
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دراسة: حفنة من الجوز يوميا تحميك من سرطان القولون
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تنشيط أول مفاعل ملح منصهر يستعمل الثوريوم في العالم.. سباق "الأرنب والسلحفاة"
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الطلبة المشاركون: مسابقة فنِّ الخطابة تمثل فرصة للتنافس الإبداعي وتنمية المهارات
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