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Bio-based polyalkylene glycol and preparation method thereof

A polyalkylene glycol and bio-based technology, applied in the field of bio-based polyalkylene glycol and its preparation, can solve the problems of complex post-processing and high cost

Inactive Publication Date: 2014-04-30
俏东方生物燃料集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Acid-catalyzed polymerization is currently being phased out due to high cost and complicated post-treatment

Method used

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  • Bio-based polyalkylene glycol and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Configure 50g of sodium methoxide and methanol starter with a molar ratio of 1:4, and then add 10g of tetrahydrofuran to the reaction kettle under a nitrogen atmosphere, raise the temperature to 100°C, and the pressure is 0.4MPa. After reacting for 6 hours, cool the reaction kettle to room temperature Under normal pressure, 3g of 2-methyltetrahydrofuran was added, the molar ratio of 2-methyltetrahydrofuran to tetrahydrofuran was 1:4, the reaction temperature was 100°C, the pressure was 0.8MPa, and the bio-based PAG was prepared after 4 hours of reaction.

Embodiment 2

[0023] Configure 50g of sodium hydroxide and ethanol starter with a molar ratio of 1:4, and then add 10g of tetrahydrofuran to the reactor under a nitrogen atmosphere, heat up to 80°C, and pressure 0.4MPa. After 6 hours of reaction, the reactor is cooled to At normal temperature and pressure, 1.2 g of 2-methyltetrahydrofuran was added, the molar ratio of 2-methyltetrahydrofuran to tetrahydrofuran was 1:10, the reaction temperature was 120 ° C, the pressure was 0.4 MPa, and the bio-based PAG was prepared after 4 hours of reaction.

Embodiment 3

[0025] Configure 50g of potassium hydroxide and ethylene glycol starter with a molar ratio of 1:2, and then add 10g of tetrahydrofuran to the reaction kettle under nitrogen atmosphere, raise the temperature to 150°C, and the pressure is 0.2MPa. After 4 hours of reaction, the reaction kettle Cool down to normal temperature and pressure, then add 2.4g 2-methyltetrahydrofuran, the molar ratio of 2-methyltetrahydrofuran to tetrahydrofuran is 1:5, the reaction temperature is 100°C, the pressure is 0.8MPa, and the bio-based PAG is prepared after 4 hours of reaction .

[0026]

[0027] performance Example 1 Example 2 Example 3 relative molecular weight 970 1590 3380 Viscosity at 40°C (mm 2 / s) 53 130 700 viscosity index 212 230 269 Pour point / ℃ -40 -34 -29 Relative density (20 / 20°C) 1.036 1.046 1.058 Closed flash point / ℃ 194 202 172 Reverse melting point / ℃ 52 70 78

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Abstract

The invention relates to bio-based polyalkylene glycol and a preparation method thereof. The product is a segmented copolymer which is prepared by using furfural derivative tetrahydrofuran and 2-methyltetrahydrofuran produced from wood fiber biomass as raw materials by a polymerization process, and has the structure shown in the specification. The preparation method comprises the following steps: adding tetrahydrofuran and an initiator in a mass ratio of 1:(2-10) into a reaction kettle in an inert gas atmosphere, and reacting at a temperature of 80-150 DEG C and a pressure of 0.2-0.5MPa for 4-15 hours to prepare a polytetramethylene glycol homopolymer; cooling the reaction kettle to normal temperature and normal pressure, adding 2-methyltetrahydrofuran into the reaction kettle, reacting at a temperature of 100-120 DEG C and a pressure of 0.4-1MPa for 2-8 hours to prepare the bio-based polyalkylene glycol, wherein the molar ratio of 2-methyltetrahydrofuran to tetrahydrofuran is 1:(1-10). The bio-based polyalkylene glycol has the advantages that the product by a process flow for producing bio-based PAG (polyalkylene glycol) from wood fiber biomass can achieve the performance index of fossil based PAG, and can completely replace an existing fossil based product.

Description

technical field [0001] The invention belongs to the field of renewable energy utilization, in particular to a bio-based polyalkylene glycol and a preparation method thereof. Background technique [0002] Polyalkylene glycol (PAG) is a relatively unique synthetic lubricant. It is a high molecular polymer with ether bond structure in the main chain formed by copolymerization or homopolymerization of epoxy compounds and their derivatives. Its main structural unit Composed of ethylene oxide (EO), propylene oxide (PO), butylene oxide (BO) or tetrahydrofuran (THF). PAG copolymers can be divided into random polymers and block polymers according to the distribution of monomer sequences. Because of its high oxygen content, in addition to cleaning, it is also used in the occasions where petroleum products have carbon deposits and sludge. It can change the structure into water-soluble or water-insoluble products. It is the only water-soluble lubricant. [0003] The synthesis of polye...

Claims

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Application Information

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IPC IPC(8): C08G65/331C08G65/28
CPCC08G65/20
Inventor 颉二旺张维
Owner 俏东方生物燃料集团有限公司
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