Method of preparing hydroxyl acetonitrile in industrial scale from acrylonitrile apparatus by-product formonitrile
A hydroxyacetonitrile, industrial-scale technology, applied in the field of comprehensive utilization of by-product hydrocyanic acid in acrylonitrile plant, can solve problems such as the speed of dropping hydrocyanic acid, the limit of reaction speed, and the absence of hydroxyacetonitrile, so as to achieve no three wastes discharge , The effect of low production cost and simplified post-processing
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0023] Proportion: hydrogen cyanide: formaldehyde: sodium sulfite = 1: 1.0: 0.015
[0024] Raw materials: formaldehyde (GB9009-1998) produced in Shandong, content ≥ 37.0%, acidity (calculated as formic acid) ≤ 0.04%;
[0025] Hydrocyanic acid is a by-product of the acrylonitrile plant, and the content used this time is 99.5%;
[0026] Catalyst, local production, industrial specification.
[0027] Dosage:
[0028] Formaldehyde 1783.06kg (content 37.2%, converted to pure 663.30kg, equivalent to 22.11kmol)
[0029] Hydrocyanic acid 600kg (content 99.5%, pure 597kg, equivalent to 22.11kmol)
[0030] Sodium sulfite 42.21kg, (content 99%, pure 41.79kg, equivalent to 0.33kmol)
[0031] Operation: Add formaldehyde to the reaction tank first, add the catalyst sodium sulfite under stirring, control the temperature in the tank with interlayer freezing and cooling water to 10°C, start adding hydrocyanic acid dropwise, and control the temperature at 10-15°C. After the addition, keep t...
Embodiment 2
[0035] Proportion: hydrogen cyanide: formaldehyde: sodium bisulfite = 1: 1.5: 0.001
[0036] Dosage: 2425.88kg of formaldehyde (content 37.1%, equivalent to 900kg pure, equivalent to 30.00kmol)
[0037] Hydrocyanic acid 542.71kg (content 99.5%, pure 540kg, equivalent to 20.00kmol)
[0038] Sodium bisulfite 2.10kg, (content 99%, pure 2.08kg, equivalent to 0.02kmol)
[0039] Operation: Stir formaldehyde and sodium bisulfite, add hydrocyanic acid at 10-20°C, and react for 4 hours at 30-40°C. After the reaction is complete, adjust the pH to 3 with industrial hydrochloric acid to obtain a total of 2845.5kg of product solution. The content of hydroxyacetonitrile measured by the complexation cyanide method is 40.0% or pure 1138.2kg, which is equivalent to 19.97kmol, the yield is 99.85%, and the pH is 3. All the other are with embodiment 1.
Embodiment 3
[0041] Proportion: hydrogen cyanide: formaldehyde: ammonium bisulfite = 1: 1.2: 0.005
[0042] Dosage: Formaldehyde 1920kg (content 37.5%, equivalent to 720kg pure, equivalent to 24.00kmol)
[0043] Hydrocyanic acid 542.71kg (content 99.5%, pure 540kg, equivalent to 20.00kmol)
[0044] Ammonium bisulfite 10.05kg, (content 98.5%, pure 9.9kg, equivalent to 0.1kmol)
[0045] Operation: Stir formaldehyde and sodium bisulfite, add hydrocyanic acid at 0-10°C, and react for 6 hours at 0-15°C. After the reaction is complete, adjust the pH to 4.5 with industrial nitric acid, and obtain a total of 2444.75kg of product solution. The content of hydroxyacetonitrile was 46.57% or 1138.52kg pure by complexation cyanide method, equivalent to 19.974kmol, the yield was 99.87%, and the pH was 4.5. All the other are with embodiment 1.
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