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5-氯-2-氨基三氟甲苯工艺方案 1、侧链氯化：甲苯在催化剂存在下，通入氯气得三氯甲苯。 2、氟化：三氯甲苯在氟化氢和催化剂存在下，升温反应得三氟甲苯粗产品，常压精馏得三氟甲苯。 3、环氯化：三氟甲苯在催化剂的存在下，通入氯气得间氯三氟甲苯粗产品，减压精馏得间氯三氟甲苯。 4、硝化：间氯三氟甲苯在硫酸与硝酸的存在下，常温反应得5-氯-2-硝基三氟甲苯粗产品，减压精馏得成品。 5、还原：5-氯-2-硝基三氟甲苯在甲醇和催化剂的存在下，通入氢气的粗产品，回收甲醇后，减压精馏得产品。 |
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hitoli
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Assisson: 金币+10, ★★★很有帮助 2015-07-28 10:15:51
Assisson: 金币+10, ★★★很有帮助 2015-07-28 10:15:51
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Technology program for 5-chloro-2-aminotrifluorotoluene 1. chlorizatoin of side-chain: trichlorotoluene is obtained through toluene reacting with chlorine in the presence of catalyst. 2. fluorization: trichlorotoluenen, in the presence of hydrogen fluoride and catalysts, was heated to obtain rude trifluorotoluene, which was distilled to trifluorotoluene under atomosphere. 3. ring chlorination: trifluorotoluene reacted with chlorine in the presence of catalysts to obtain crude meso-chlorotrifluorotoluene, which was distilled to meso-chlorotrifluorotoluene under reduced pressure. 4. nitration: meso-chlorotrifluorotoluene reacted in the presence of sulfuric acid and nitric acid under room temperature to get raw 5-chloro-2-nitrotrifluorotoluene, which was distilled to product under reduced pressure. 5. reduction: 5-chloro-2-nitrotrifluorotoluene reacted with hydrogen in the presence of methanol and catalysts to get raw product, which was distilled to product under reduced pressure after recycle of methanol. |
3楼2015-07-26 21:07:42
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Assisson: 金币+20, 翻译EPI+1, ★★★很有帮助 2015-07-28 10:15:32
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5-氯-2-氨基三氟甲苯工艺方案 Technological Process for 2-Amino-5-chlorobenzotrifluoride 1、侧链氯化：甲苯在催化剂存在下，通入氯气得三氯甲苯。 1,side chain chlorination: With the presence of methylbenzene as catalyst, the trichlorotoluene can be obtained by ventilating chlorine gas 2、氟化：三氯甲苯在 氟化氢和催化剂存在下，升温反应得三氟甲苯粗产品，常压精馏得三氟甲苯。 2, Fluorinatio: Under the effect of hydrogen fluoride and catalyst, trichlorotoluene can be reacted into crude trifluorotoluene by increasing reaction temperaturem and then become the refined trifluorotoluene through normal pressure rectification. 3、环氯化：三氟甲苯在 催化剂的存在下，通入氯气 得 间氯三氟甲苯粗产品，减压精馏 得间氯三氟甲苯。 3, Cyclizing chlorination: With the presence of catalyst, the trifluorotoluene can be firstly reacted into crude chlorobenzotrifluoride and then become the refined the product by vacuum distillation 4、硝化：间氯三氟甲苯 在硫酸与硝酸的存在下，常温反应得 5-氯-2-硝基三氟甲苯 粗产品，减压精馏得成品。 4, nitration: With the presence of sulfuric acid and nitric acid, the chlorobenzotrifluoride will be first reacted into crude 5-chloro-2-nitrobenzotrifluoride under normal temperature, and then become the refined product through vacuum distillation. 5、还原：5-氯-2-硝基三氟甲苯 在 甲醇和催化剂的存在下，通入氢气的粗产品，回收甲醇后，减压精馏得产品。 5, Reduction reaction: With the presence of methyl alcohol and catalyst, by ventilating hydrogen, firstly the crude 5-chloro-2-nitrobenzotrifluoride can be prepared, then the refined product can be obtained by recycling the waste methyl alcohol within and vacuum distillation. |
2楼2015-07-26 20:57:15
