File:01. Синтеза на β-нафтолоранж.ogv
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[edit]Description01. Синтеза на β-нафтолоранж.ogv |
English: Synthesis of β-naphthol orange
1.35 g of Na2CO3 are dissolved with 50 ml of H2O in a 250 cm3 Erlenmeyer flask. Afterwards, 5.35 g of sulfanilic acid was added to the solution. If necessary, the solution should be heated on a stove until a clear solution is obtained. In doing so, sulfanilic acid is converted into Na-sulfonate, which is soluble in water. The solution is cooled to 10-15 °C. To this, 1.85 g of NaNO2 dissolved in 5 ml of H2O (dissolved in the cold) was added slowly with stirring. 5 ml of HCl and 10 ml of H2O (T = 10-15 °C) were placed in a 200 ml beaker. The previously prepared solution in the erlenmeyer flask was added to this mixture for 15 min with constant stirring. Mixing is continued until crystals of diazobenzenesulfonic acid (diazo salt) are formed. In a 200 ml beaker, 3.6 g of β-naphthol were dissolved in 20 ml of 10% NaOH. The solution was cooled to approximately 5 °C. The solution thus prepared was added to the previously obtained diazo salt. During this coupling reaction, a solid product is formed. After 10 min, the mixture was heated to dissolve the solid product. 10 g of NaCl was added to this solution and heated again (5 min). The solution was allowed to cool and crystals form which are filtered through a vacuum filtration system, rinsed with water and dried. Demonstrated by Asst. MSc Marija Proševa. Planned and prepared by Prof. PhD Vesna Dimova and laboratory technician Maja Senčeva Petrevska, Institute of Organic Technology, Faculty of Technology and Metallurgy, SCMU, Skopje, Macedonia.Македонски: Синтеза на β-нафтолоранж
Во ерленмаерка од 250 cm 3 се става 1,35 g Na2CO3 и се додаваат 50 ml H2O, се меша се додека не се раствори. Кон растворот се додава 5,35 g сулфанилна киселина и доколку е потребно се загрева на решо се додека не се добие бистар раствор. При тоа сулфанилната киселина се преведува во Na-сулфонат, кој е растворлив во вода. Растворот се лади до 10-15 °C. Кон него, полека со мешање се додава 1,85 g NaNO2 растворени во 5 ml H2O (растворени на ладно). Во чаша од 200 ml се ставаат 5 ml HCl и 10 ml H2O (Т = 10-15 °C). Кон оваа смеса во тек на 15 минути со постојано мешање се додава претходно приготвениот раствор во ерленмаерката. Мешањето продолжува се до образување на кристали од диазобензенсулфонска киселина (диазо сол). Во чаша од 200 ml се раствораат 3,6 g β-нафтол во 20 ml 10 % NaOH. Растворот се лади до приближно 5 °C. Вака подготвениот раствор се додава кон претходно добиената диазо сол. При оваа реакција на куплирање се образува цврст продукт. По 10 минути смесата се загрева за да се раствори цврстиот производ. Кон овој раствор се додаваат 10 g NaCl и повторно се загрева (5 минути). Растворот се остава да се олади при што се образуваат кристали кои се филтрираат преку систем за вакуумско филтрирање, се плакнат со вода и се сушат. Изведено од ас. м-р Марија Прошева. Планирано и подготвено од проф. д-р Весна Димона и лаборант Маја Сенчева Петревска, Институт за органска технологија, Технолошко-металуршки факултет, УКИМ, Скопје, Македонија. |
Date | |
Source | Own work |
Author | Дени Ингилизовски |
This organic technology experiment video was made within the Wikiexperiments 2022 set up by Shared Knowledge.
You can see all the videos in the category Organic technology Wikiexperiments. English | македонски | +/− |
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