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Date: 9-5-2016
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Date: 18-9-2017
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Date: 11-8-2017
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ADIPONITRILE (NC(CH2)4CN)
Adiponitrile, a colorless liquid, is slightly soluble in water but soluble in alcohol. The main use of adiponitrile is to make nylon 6/6. The production of adiponitrile from butadiene starts by a free radical chlorination, which produces a mixture of 1,4-dichloro-2-butene and 3,4- dichloro-l-butene:
The vapor-phase chlorination reaction occurs at approximately 200–300°C. The dichlorobutene mixture is then treated with NaCN or HCN in presence of copper cyanide. The product 1,4-dicyano-2-butene is obtained in high yield because allylic rearrangement to the more thermodynamically stable isomer occurs during the cyanation reaction:
Adiponitrile may also be produced by the electrodimerization of acrylonitrile or by the reaction of ammonia with adipic acid followed by two-step dehydration reactions:
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تفوقت في الاختبار على الجميع.. فاكهة "خارقة" في عالم التغذية
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أمين عام أوبك: النفط الخام والغاز الطبيعي "هبة من الله"
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المجمع العلمي ينظّم ندوة حوارية حول مفهوم العولمة الرقمية في بابل
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