Technique for producing sumitone fast violet RL
A production process and a technology for permanent violet, applied in the chemical industry, can solve the problems of large amount of ortho-dichlorobenzene, large labor consumption, serious environmental pollution, etc., and achieve the effects of short reaction time, small production process pollution and stable product quality.
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment Construction
[0042] Below in conjunction with accompanying drawing, the present invention will be further described:
[0043] 1. Alkylation process
[0044] 1. Put 46% liquid caustic soda into the reaction pot (if the content is insufficient, add caustic soda).
[0045] 2. Cool to below 35°C while stirring, then put in carbazole and catalyst benzyl ammonium chloride.
[0046] 3. After adding carbazole and catalyst, cover and seal, stir for 15 minutes, then slowly add pure benzene and ethyl bromide under stirring.
[0047] 4. After adding pure benzene and ethyl bromide, stir for 15 minutes and slowly raise the temperature to 40-45°C. If there is reflux, stop heating and keep reflux to maintain the temperature.
[0048] 5. After the reflux is completed, the temperature is raised to 100-120α / s, and pure benzene is recovered, and the recovery amount is about 80% of the feeding amount.
[0049] 6. After recovery of pure benzene, stand still for 20 minutes, then separate the lower layer of li...
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com