Biologic polycarbonate and preparation method thereof

A polycarbonate, bio-based technology, applied in the direction of fatty acid preparation/refinement, fatty acid esterification, fatty acid production, etc., can solve the problems of environmental protection, increase specific gravity, reduce steric hindrance, good flexibility and bioavailability degradability effect

Inactive Publication Date: 2012-07-18
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
View PDF1 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In order to solve the problem that most of the polycarbonates in the prior art are petroleum-based and not environmentally friendly, the present invention provides a bio-based polycarbonate and a preparation method thereof. The raw material is naturall

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Biologic polycarbonate and preparation method thereof
  • Biologic polycarbonate and preparation method thereof
  • Biologic polycarbonate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0042] A preparation method of bio-based epoxy fatty acid ester. The following are the specific synthesis steps of first hydrolyzing, freezing and separating, then epoxidizing, and then polymerizing with carbon dioxide:

[0043] The first step is the hydrolysis and separation of natural vegetable oils: the molar ratio of natural vegetable oils to sodium hydroxide is 1:1~1:5, and the ratio of lower alcohol is slightly excessive. Dissolve NaOH in distilled water and add it together with lower alcohol In a three-necked flask, the grease is dripped from the separatory funnel to the three-necked flask at a constant rate, and the mechanical stirring is even. The reflux temperature is generally at 60℃~80℃ for 0.5h~3h, keep for 1h~2h, cool to room temperature and then drip Adjust the pH value to 3~4 with hydrochloric acid, stand at room temperature for layering, the lower layer is the crude glycerin phase, and the glycerin can be recovered and extracted. The separated crude fatty acid and...

Example Embodiment

[0051] Example 1:

[0052] The first step is the hydrolysis and separation of natural vegetable fats: the molar ratio of tung oil to sodium hydroxide is 1:3, and methanol is slightly excessive. Dissolve NaOH in distilled water and add methanol together with the three-necked flask. The fat is added dropwise from the separatory funnel at a constant rate In the three-necked flask, mechanically stir uniformly. The reflux temperature is generally at 60°C for 3h and keep for 2h. After cooling to room temperature, hydrochloric acid is added dropwise to adjust the pH to 3~4. The lower layer is the crude glycerin phase. , Glycerol can be recovered and extracted, the separated upper crude fatty acid and low-carbon alcohol are mixed and sealed in a mass ratio of 1:3, pre-cooled at 0°C and frozen at -20°C for 2 hours, filtered at low temperature to obtain a clear filtrate, and the filter cake is dissolved Distill under reduced pressure to obtain saturated fatty acids. The filtrate is disti...

Example Embodiment

[0055] Example 2 :

[0056] The first step is the hydrolysis and separation of natural vegetable oils: the molar ratio of Pistacia chinensis oil to sodium hydroxide is 1:1, and the methanol is slightly excessive. Dissolve NaOH in distilled water and add methanol together with the three-necked flask. The grease flows from the separatory funnel at a constant rate. Add dropwise to a three-necked flask, mechanically stir evenly, the reflux temperature is generally at 70℃ for 2h, keep for 5h, after cooling to room temperature, add hydrochloric acid dropwise to adjust the pH value to 3-4, stand still at room temperature and layer, the lower layer is coarse The glycerol phase can be recovered and extracted. The separated upper crude fatty acid and methanol are mixed and sealed at a mass ratio of 1:5, pre-cooled at 1°C and frozen at -15°C for 2h each, filtered at low temperature to obtain a clear filtrate, and the filter cake is dissolved Distill under reduced pressure to obtain saturat...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a biologic polycarbonate and a preparation method thereof. The biologic polycarbonate is obtained by polymerizing biologic epoxy fatty acid ester serving as a raw material and CO2 gas, the yield is more than or equal to 70 percent, the number-average molecular weight is 11,000 to 30,000, and the molecular weight distribution is 1.10 to 1.74; and the biologic epoxy fatty acid ester is obtained by hydrolyzing, freezing and separating unsaturated fatty acid ester from natural vegetable fat and then performing epoxidation, or obtained by direct epoxidation of the natural vegetable fat. The renewable natural vegetable fat and the greenhouse gas CO2 are used as raw materials, so the method is environment-friendly, low in cost and simple and feasible in process operation, the solvent and the catalyst can be efficiently recycled, and the method is environment-friendly and suitable for industrialized production.

Description

technical field [0001] The invention belongs to the technique of synthesizing polycarbonate, in particular to a bio-based polycarbonate prepared from natural vegetable oil and a preparation method thereof. Background technique [0002] carbon dioxide (CO 2 ) is not only the main gas that causes the global warming effect, but also a kind of abundant, non-toxic, non-combustible, cheap and renewable resource. to CO 2 The rational development and utilization of resources is in line with the country's long-term development plan and has important environmental significance and social value. [0003] CO 2 The utilization of resources mainly includes physical utilization - such as inert gas, coolant, beverage gas, gas fertilizer, and chemical utilization - organic solvents and carbon sources in chemical reactions. with CO 2 As a carbon source, chemicals such as urea, alcohols, acids, polyesters, etc. are synthesized by chemical methods to become CO 2 Hotspots and trends in re...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C08G64/34C11C1/04C11C3/04
CPCY02P20/584C08G64/34
Inventor 蒋剑春王奎陈洁李静应浩
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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