Indole Introduction： Indole is extracted from coal tar or washing oil, through acid washing, alkali washing, distillates, cooling, crystallization, centrifugal filtration, to get the fraction of indole. Source: From the wash oil fraction extracted in high temperature coal tar, containing about...Send Inquiry
Indole is extracted from coal tar or washing oil, through acid washing, alkali washing, distillates, cooling, crystallization, centrifugal filtration, to get the fraction of indole.
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.
The package of all our chemical products reaching up to the industry standard, we usually use kraft drums or woven bags for our powder state products.
It can evaporate with water vapor, place it in the air or see light and turn red, and resin. A highly diluted solution that can be used as a spice.
White or colorless crystals with stink of feces
Sealed at 4 C to dry and avoid light
Soluble in hot water and benzene, easy to dissolve in ethanol, ether and toluene
It is mainly used as the raw material of spices, dyes, amino acids and pesticides. Indole itself is also a spice, often used in jasmine, lilacs, lotus and orchids, such as the daily flavor formula, the amount is generally in a thousand.
In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
Wear suitable protective clothing, gloves and eye/face protection.