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大本蟲木蟲 (著名寫手)
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yifeng1206
鐵桿木蟲 (著名寫手)
- 翻譯EPI: 21
- 應助: 75 (初中生)
- 金幣: 6164.4
- 散金: 1350
- 紅花: 22
- 帖子: 1510
- 在線: 861.7小時
- 蟲號: 734148
- 注冊: 2009-03-29
- 性別: MM
- 專業(yè): 生物材料
2樓2015-12-06 16:18:42
yifeng1206
鐵桿木蟲 (著名寫手)
- 翻譯EPI: 21
- 應助: 75 (初中生)
- 金幣: 6164.4
- 散金: 1350
- 紅花: 22
- 帖子: 1510
- 在線: 861.7小時
- 蟲號: 734148
- 注冊: 2009-03-29
- 性別: MM
- 專業(yè): 生物材料
【答案】應助回帖
★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★
大本蟲: 金幣+35, 翻譯EPI+1, ★★★很有幫助 2015-12-06 16:58:47
大本蟲: 金幣+35, 翻譯EPI+1, ★★★很有幫助 2015-12-06 16:58:47
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The solid materials, who will soon be deposited, was separated by filtering. It weighed 5 gr., and contained, furthermore a little of symmetric trichloroaniline, the colorful accessory products. We poured the mother-liquor into a grand quantity of water, who provide a flocculent precipitate, slightly colored, weighted 19 gr. This product was a mixture of symmetric trichloroaniline (18 gr.), melting point at 78 °, and dichlorineobenzoic acid (1 gr.). By heating with caustic lye, the acid was dissolved, while melt trichloroaniline was driven in part by the water vapor. After cooling and filtration, we get dichloraminobenzoique acid by acidification of the filtrate. It is not totally colorless. Here is the analyses of the product. |
3樓2015-12-06 16:50:22
大本蟲
木蟲 (著名寫手)
- 應助: 0 (幼兒園)
- 金幣: 884.8
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- 蟲號: 898981
- 注冊: 2009-11-10
- 性別: GG
- 專業(yè): 有機化工
4樓2015-12-06 16:58:32
yifeng1206
鐵桿木蟲 (著名寫手)
- 翻譯EPI: 21
- 應助: 75 (初中生)
- 金幣: 6164.4
- 散金: 1350
- 紅花: 22
- 帖子: 1510
- 在線: 861.7小時
- 蟲號: 734148
- 注冊: 2009-03-29
- 性別: MM
- 專業(yè): 生物材料
【答案】應助回帖
★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★
大本蟲: 金幣+35, ★★★★★最佳答案 2015-12-07 07:49:07
大本蟲: 金幣+35, ★★★★★最佳答案 2015-12-07 07:49:07
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好吧，友情翻譯一段。 不過你這個是跟誰的對話嗎？還是博士論文中的一段討論？ I have prepared the 3-5-dichloro-4-aminobenzoique acid, that I was not able to find in the references, by chlorination of p-aminobenzoique acid. This preparation gave more difficulty than similar bromination, because the carboxyl group was abandoned so easily, that most part of the material is transformed into symmetric trichloraniline. Moreover it formed, maybe because of the oxidation, the colored products, however, which we can remove easily. It is not impossible that we can improve the yield of dichoraminobenzoque acid by a change of procedure. I did not study this because I have had enough materials for the experiement, that I want to do. For the preperation of produit, 20 g p-aminobenzoique acid were dissolved into 600 ml glacial acetic acid and mixed to 400 ml contrated chlorhydride acid. So we get a fine suspension. Then 12 g potassium chlorate was introduced by small amount, all in stirring and cooled in the help of a mixture of ice-salt. During the chlorination, the suspension took a darker color. At the end of the reaction, we add again a little of sodium sulfite solution, to be sure that there was not excess chlorine anymore. |
5樓2015-12-06 18:09:16
大本蟲
木蟲 (著名寫手)
- 應助: 0 (幼兒園)
- 金幣: 884.8
- 散金: 106
- 沙發(fā): 6
- 帖子: 2464
- 在線: 84.4小時
- 蟲號: 898981
- 注冊: 2009-11-10
- 性別: GG
- 專業(yè): 有機化工
6樓2015-12-07 07:49:26
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