Lepidine CAS 491-35-0
9,9′-(1,3-Phenylene)bis-9H-carbazole CAS 550378-78-4
18 6 月, 20202-Chlorotoluene CAS 95-49-8
18 6 月, 2020
Lepidine Typical Properties
| Purity | 98.0% min (GC) |
| Water | ≤ 0. 2% （K.F） |
| Brand name | Fousi chemical |
Lepidine Usage
Used as intermediates of dyes, medicines and photosensitive materials
Lepidine Packaging and Shipping
Packing: iron drums with PVF coated of 200kg or 50kg net
Delivery: by air, by sea
Lepidine Storage
Stored in a cool dry place away from direct sunlight
Lepidine production method
The product can be recovered from kerosene. The 260-267°C fraction intercepted from the heavy pyridine residue oil contains 35%-56% 4-methylquinoline. This fraction is reacted with 98% concentrated sulfuric acid in alcohol, and the temperature is controlled at 35°C to generate sulfonate. After cooling, crystallization, and filtration, the obtained crystal is recrystallized with 3 times the weight of alcohol to obtain a melting point greater than 220 Crystallization at ℃, then use 20% deep ammonia water to decompose to pH=8 at room temperature to obtain crude 4-methylquinoline. Then it is distilled in a distillation tower with 20 theoretical plates, and the distillate at 262.3-266.8°C is cut to obtain 4-methylquinoline with a purity of greater than 95%.