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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
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  • 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 naturally renewable, the cost is low, the process is operable, and the solvent And the method for preparing bio-based polycarbonate from natural vegetable oil with simple and convenient catalyst recovery, excellent product performance and high industrial feasibility

Method used

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  • Biologic polycarbonate and preparation method thereof
  • Biologic polycarbonate and preparation method thereof
  • Biologic polycarbonate and preparation method thereof

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preparation example Construction

[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 separation of natural vegetable oils: the molar ratio of natural vegetable oils to sodium hydroxide is 1: 1 to 1: 5, and the proportion of low-carbon alcohol is slightly excessive. Dissolve NaOH in distilled water and add it together with low-carbon alcohol In a three-necked flask, oil is added dropwise from the separatory funnel to the three-necked flask at a constant speed, mechanically stirred evenly, the reflux temperature is generally 60°C-80°C and the reaction is added dropwise for 0.5h-3h, kept for 1h-2h, cooled to room temperature and added dropwise Adjust the pH value to 3-4 with hydrochloric acid, stand at room temperature and separate layers, the lower layer is the crude glycerin phase, which can be recovered t...

Embodiment 1

[0052] The first step is the hydrolysis separation of natural vegetable oils: the molar ratio of tung oil to sodium hydroxide is 1: 3, methanol is slightly excessive, NaOH is dissolved in distilled water and added to a three-necked flask together with methanol, and the oil is added dropwise from the separatory funnel at a constant speed Transfer to a three-necked flask, mechanically stir evenly, reflux temperature is generally at 60°C dropwise reaction for 3h, keep warm for 2h, after cooling to room temperature, dropwise add hydrochloric acid to adjust the pH value to 3-4, stand at room temperature and separate layers, the lower layer is the crude glycerin phase Glycerin can be recovered and extracted, the separated upper crude fatty acid and low-carbon alcohol are mixed and sealed at a mass ratio of 1: 3, pre-cooled at 0°C and low-temperature frozen at -20°C for 2 hours each, filtered at low temperature to obtain a clear filtrate, after the filter cake is dissolved Distilled u...

Embodiment 2

[0056] The first step, the hydrolysis separation of natural vegetable oils: the molar ratio of Pistacia chinensis oil to sodium hydroxide is 1: 1, methanol is slightly excessive, NaOH is dissolved in distilled water and added to a three-necked flask together with methanol, and the oil is discharged from the separatory funnel at a constant rate. Add dropwise to a three-necked flask, mechanically stir evenly, reflux temperature is generally at 70°C for 2 hours, keep warm for 5 hours, after cooling to room temperature, add hydrochloric acid dropwise to adjust the pH value to 3-4, stand at room temperature to separate layers, the lower layer is coarse Glycerin phase, glycerin 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 low-temperature frozen at -15°C for 2 hours each, filtered at low temperature to obtain a clear filtrate, after the filter cake dissolves Distilled under reduced...

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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

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Application Information

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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
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