Preparation method of glyceryl triacetate
A technology of glycerol acetate and glycerol, which is applied in the field of preparation of glycerol triacetate, can solve the problem that the quality standard of glycerol triacetate cannot be reached, the production of high quality glycerol triacetate, the yield of glycerol triacetate and the The problem of low purity, etc., achieves the effect of good catalytic effect, reduction of side reaction polymerization products, and shortening of esterification time.
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0036] Step (1): Stir 1.0ml of concentrated sulfuric acid (1.84g) and 1.84g of activated carbon with pH=1 and raise the temperature to 180°C, keep it warm for 20min, cool it naturally, and place it at room temperature for 17 days to prepare the catalyst.
[0037]Step (2): Mix the catalyst prepared in step (1) and stir with 50ml of glycerin, 150ml of acetic acid and 20ml of ethyl acetate and heat up to 100°C. After 20 hours of reaction, the water content is 0.019%, and the reaction is stopped. Add 1.5g of activated carbon for decolorization, pump acid for 3 hours at a steam pressure of 0.45MPa and a temperature of 120°C, add saturated aqueous soda ash for neutralization, dehydrate at a temperature of 60-70°C, dehydrate at a steam pressure of 0.3MPa, dehydrate for 4 hours, and filter with suction to obtain Glyceryl triacetate, the recovery rate is 96%, the purity of glyceryl triacetate detected by GC is 99.79%, the moisture content is 0.016%, the color is No. 10 (platinum-cobalt)...
Embodiment 2
[0039] Step (1): Stir 0.5ml of concentrated sulfuric acid (0.92g) and 1.0g of activated carbon with pH=1 and raise the temperature to 180°C, keep it warm for 20min, cool it naturally, and place it at room temperature for 15 days to prepare the catalyst.
[0040] Step (2) Heat the catalyst prepared in step (1) with 50ml of glycerin, 180ml of acetic acid and 30ml of ethyl acetate to 130°C. After 18 hours of reaction, the water content is 0.029%, and the reaction is stopped. Add 1.85g of activated carbon for decolorization, pump acid for 3 hours at a steam pressure of 0.35MPa and a temperature of 140°C, add a saturated aqueous solution of soda ash for neutralization, dehydrate at a temperature of 80~90°C, and a steam pressure of 0.25MPa, dehydrate for 4 hours, and filter to obtain Glyceryl triacetate, the recovery rate is 95%, the purity of glyceryl triacetate detected by GC is 99.71%, the moisture content is 0.018%, the color is No. 10 (platinum-cobalt), the acidity is 0.004%, an...
Embodiment 3
[0042] Step (1) Stir 1.0ml of concentrated sulfuric acid (1.84g) and 2.2g of activated carbon with a pH of 1 and raise the temperature to 180°C, keep it warm for 30 minutes, cool it naturally, and place it at room temperature for 20 days to prepare the catalyst.
[0043] Step (2): Heat the catalyst prepared in step (1) with 50ml of glycerin, 200ml of acetic acid and 50ml of cyclohexane to 120°C. After 19 hours of reaction, the water content is 0.018%, and the reaction is stopped. Add 1.25g of activated carbon for decolorization, pump acid for 4 hours at a steam pressure of 0.45MPa and a temperature of 130°C, add saturated aqueous soda ash for neutralization, dehydrate at a temperature of 70°C, dehydrate at a steam pressure of 0.20MPa, and dehydrate for 4 hours, and filter to obtain three Glyceryl acetate. The yield was 96%, the purity of triacetin detected by GC was 99.80%, the moisture content was 0.022%, the chromaticity was No. 10 (platinum-cobalt), the acidity was 0.0036%,...
PUM
Property | Measurement | Unit |
---|---|---|
refractive index | aaaaa | aaaaa |
refractive index | aaaaa | aaaaa |
refractive index | aaaaa | aaaaa |
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