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Date: 9-5-2016
1519
Date: 10-9-2017
3439
Date: 3-9-2017
1185
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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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علامات بسيطة في جسدك قد تنذر بمرض "قاتل"
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أول صور ثلاثية الأبعاد للغدة الزعترية البشرية
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مدرسة دار العلم.. صرح علميّ متميز في كربلاء لنشر علوم أهل البيت (عليهم السلام)
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