Preparation method of polymerization type environment-friendly plasticizer diethylene glycol dicyclohexyl-1,3-diisobutyl dicarboxylate
A technology of diisooctyl dicarboxylate and diethylene glycol reduction, which is applied in the field of chemical engineering and can solve problems such as high prices, increased production costs of plasticizers, and large consumption
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
preparation example Construction
[0009] The steps of the preparation method of polymeric environment-friendly plasticizer diethylene glycol dicyclohexane-1,3-dicarboxylic acid diisooctyl are as follows:
[0010] 1) Mix 1 mole of diethylene glycol, 4.25 moles of cyclohexane-1,3-dicarboxylic acid anhydride and catalyst, stir and heat for cross-linking reaction, control the reaction temperature at 150°C, and keep the reaction at 150°C After 2-3 hours, add 1.7-2.1 moles of 2-ethylhexanol and catalyst to the reaction system, continue to stir and heat up to 220°C, react for 3-4 hours, remove excess 2-ethylhexanol, and obtain a The crude product of diethylene glycol bicyclohexane-1,3-dicarboxylate diisooctyl;
[0011] 2) Cool the crude diethylene glycol dicyclohexane-1,3-dicarboxylic acid diisooctyl to 85°C and add 1% Na 2 CO 3 The aqueous solution neutralizes the trace monoester in the material system, the catalyst in the hydrolysis system, washes with deionized water at 90°C to remove the lye entrained in the cr...
Embodiment 1
[0015] Add diethylene glycol and cyclohexane-1,3-dicarboxylic anhydride with a molar ratio of 1 / 4.25 and a total mass of 1180kg of diethylene glycol and cyclohexane-1,3-dicarboxylic anhydride to react In the container, add relative cyclohexane-1, the zinc acetate catalyst of 0.5% of the quality of 3-dicarboxylic acid anhydride, stir and heat to 150 ℃, and add 1.7 mol total mass of 1490kg after the reaction at 150 ℃ for 2 hours 2-Ethylhexanol and 0.3% tetraisopropyl titanate catalyst relative to the mass of cyclohexane-1,3-dicarboxylic acid anhydride, continue to stir and heat up to 220°C for 3 hours, then dealcoholize, cool to 85°C and add 100kg1.0wt %Na 2 CO 3 Neutralize with aqueous solution, wash with ion-free water at 90°C, refine with direct steam stripping under reduced pressure for 3 hours, add 0.1% of the total amount of the kettle material to absorb and decolorize for 30 minutes, and obtain diethylene glycol bicyclohexane- 1,3-Diisooctyl dicarboxylate, its yield is ...
Embodiment 2
[0017] Add diethylene glycol and cyclohexane-1,3-dicarboxylic anhydride with a molar ratio of 1 / 4.25 and a total mass of 1180kg of diethylene glycol and cyclohexane-1,3-dicarboxylic anhydride to react In the container, add 0.5% zinc acetate catalyst relative to the mass of cyclohexane-1,3-dicarboxylic acid anhydride, stir and heat to 150°C, and keep warm at 150°C for 2.5 hours before adding 1.8 moles of 1580kg 2-Ethylhexanol and 0.3% tetraisopropyl titanate catalyst relative to the mass of cyclohexane-1,3-dicarboxylic acid anhydride, continue to stir and heat up to 220°C for 3 hours, then dealcoholize, cool to 85°C and add 100kg1.0wt %Na 2 CO 3 Neutralize with aqueous solution, wash with ion-free water at 90°C, refine with direct steam stripping under reduced pressure for 3 hours, add 0.1% of the total amount of the kettle material to absorb and decolorize for 30 minutes, and obtain diethylene glycol bicyclohexane- 1,3-Diisooctyl dicarboxylate has a yield of 99.13%, a purity...
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