Indole (CAS NO 120-72-9)
Source: From the wash oil fraction extracted in high temperature coal tar, containing about 0.10%-0.16% indole. General can be extracted from coal tar and oil distillate. Will wash oil fraction by alkali washing and acid washing, get methylnaphthalene, then distillation in high efficiency tower 60 theoretical plates, cut out the 225-256 C fraction, with potassium hydroxide melting. The reaction is 2-4h at 170-240 C and stirred until the bubble is stopped. Statically, the lower layer of indole potassium is released and cooled, and the oil is washed with benzene at low temperature. Then the crude indole oil was hydrolyzed at 50-70 C, and distilled in 20 distillation plates of theoretical plate. The flow rate was 8-10:1, and the top temperature was 170-256 C distillate, cooling, crystallizing and centrifugation, then refined indole oil was obtained. After squeezing, the oil content is below 3%, and the purified indole with the purity of 99% is recrystallized with ethanol.
Application:
(1) Indole can be used for verifying the gold, potassium and nitrite and manufacturing jasmine-type fragrance. It can also be used in pharmaceutical industry.
(2) Indole can be used in perfumes and in the synthesis of tryptophan.
(3) In highly dil solutions the odor is pleasant, hence indole has been used in perfumery.
About us
Xiaoyi Jinjing Chemical founded in 2006,which has produced coal chemical products more than 12 years.
The company uses the most advanced production technology, the newly developed fluorene series of deep processing technology, the production of fluorenylmethoxycarbonyl succinimide, brominated fluorenone, nitrofluorenone, bis ether fluorene, bisphenol fluorene, diafluorene and so on Fluorene series of new materials products. These products can be widely used in medicine, pesticides, veterinary drugs, LCD, photographic, information, dyes, polymer, photoelectric and engineering materials and other fields. To further improve the comprehensive utilization of coal tar resources, the level of coal chemical industry from the extensive development to the fine development of the change.
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