Catalyst system and application thereof in reaction for preparing aliphatic polyester
A catalyst and system technology, applied in the field of catalyst systems, can solve the problems of difficult preparation of molecular weight, low catalyst activity, long time, etc., and achieve the effects of simple operation process, stable reaction process and easy control.
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Example Embodiment
[0034] Example 1
[0035] In a 500mL three-necked flask equipped with a mechanical stirrer, thermometer and condenser, 141.6g of 1,4-butanedioic acid (purchased from Anhui Sanxin Chemical Co., Ltd.) and 119.0g of 1,4-butanediol (purchased From Tianjin Guangfu Fine Chemical Research Institute), equivalent to tetra-n-butyl titanate (Ti(OBu) with 0.3% molar amount of 1,4-succinic acid) 4 , Purchased from Beijing Chemical Reagent Company), and equivalent to Ti(OBu) 4 0.5 times the molar amount of aluminum phosphate AlPO 4 (Purchased from Tianjin Guangfu Fine Chemical Research Institute), under normal pressure N 2 Under protection, heat with constant power until there are distillates. Collect the distillates. When the distillates are no longer distilled, switch to the vacuum distillation device when the top temperature of the condenser drops significantly, gradually reduce pressure and heat with constant power until 250℃ Keep the temperature, react for a certain period of time under th...
Example Embodiment
[0039] Example 2
[0040] In a 500mL three-necked flask equipped with a mechanical stirrer, thermometer and condenser, add 141.6g of 1,4-succinic acid and 119.0g of 1,4-butanediol, equivalent to 1,4-succinic acid mole 0.3% tetraisopropyl titanate Ti(OPr) 4 , And equivalent to Ti(OPr) 4 2 times the molar amount of aluminum phosphite Al 2 (HPO 3 ) 3 (Purchased from Tianjin Guangfu Fine Chemical Research Institute), under normal pressure N 2 Under protection, heat with constant power until there are distillates and collect the corresponding distillates. When the distillates are no longer distilled and the temperature drop at the top of the condenser tube decreases significantly, switch to the vacuum distillation device, gradually reduce pressure and heat with constant power until 250℃ Keep the temperature and react for a certain period of time under the vacuum condition of the system pressure of 200 Pa. When the viscosity of the product no longer rises significantly, set it to N 2 Re...
Example Embodiment
[0044] Example 3
[0045] In a 500mL three-necked flask equipped with a mechanical stirrer, thermometer and condenser, add 141.6g of 1,4-succinic acid and 119.0g of 1,4-butanediol, equivalent to 1,4-succinic acid mole 0.3% of tetra-n-propyl titanate, and 5 times the molar amount of tetra-n-propyl titanate, aluminum monohydrogen phosphate Al 2 (HPO 4 ) 3 , At atmospheric pressure N 2 Under protection, heat with constant power until there are distillates and collect the corresponding distillates. When the distillates are no longer distilled and the temperature drop at the top of the condenser tube decreases significantly, switch to the vacuum distillation device, gradually reduce pressure and heat with constant power until 250℃ Keep the temperature and react for a certain period of time under the vacuum condition of the system pressure of 200 Pa. When the viscosity of the product no longer rises significantly, set it to N 2 Restore normal pressure or pressurized discharge under prot...
PUM
Property | Measurement | Unit |
---|---|---|
Tensile strength | 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.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap