Preparation method for polyol and application of polyol in making polyurethane

Patent metadata

Field	Value
Publication number	US-11535708-B2
Application number	US-202016999932-A
Country	US
Kind code	B2
Filing date	Aug 21, 2020
Priority date	Apr 23, 2020
Publication date	Dec 27, 2022
Grant date	Dec 27, 2022

Abstract

A method for preparing a polyol comprises the following steps of: (1) dissolving 2,3 -epoxybutane and an acid catalyst in an inert solvent to obtain a solution A; dissolving triethylene glycol in an inert solvent to obtain a solution B; and dissolving epoxy vegetable oil in an inert solvent to obtain a solution C; (2) respectively and simultaneously pumping the solutions A and B into a first micromixer for mixing; (3) pumping the solution C and an effluent of the first microreactor into a second micromixer for mixing while carrying out step (2); and (4) dissolving the vegetable oil polyol in an inert solvent to obtain a solution D; dissolving epoxypropane and an alkaline catalyst in an inert solvent to obtain a solution E; and pumping the solution D and the solution E into a tank reactor for reaction, thereby obtaining the polyol.

First claim

What is claimed is:

1. A preparation method of a polyol, comprising the following steps of:
(1) dissolving 2,3-epoxybutane and an acid catalyst in an inert solvent to obtain a solution A; dissolving triethylene glycol in an inert solvent to obtain a solution B; and dissolving epoxy vegetable oil in an inert solvent to obtain a solution C;
(2) respectively and simultaneously pumping the solution A and the solution B into a first micromixer in a microchannel reaction device for mixing, and then introducing the mixture into a first microreactor for reaction to obtain a reaction solution containing a hydroxyl compound;
(3) respectively and simultaneously pumping the solution C and an effluent of the first microreactor into a second micromixer in the microchannel reaction device for mixing while carrying out step (2), and then introducing the mixture into a second microreactor for reaction to obtain a reaction solution containing a vegetable oil polyol, and then separating the solution to obtain the vegetable oil polyol; and
(4) dissolving the vegetable oil polyol obtained in step (3) in an inert solvent to obtain a solution D; dissolving epoxypropane and an alkaline catalyst in an inert solvent to obtain a solution E; and respectively and simultaneously pumping the solution D and the solution E into a tank reactor for reaction, thereby obtaining the polyol;
wherein the polyol is capable of being used for preparing a polyurethane.

2. The preparation method of the polyol according to claim 1 , wherein in step (1), a molar ratio of the 2,3-epoxybutane to the acid catalyst in the solution A is (1.0 to 1.25): (0.1 to 0.2), and a concentration of the 2,3-epoxybutane is 2.20 mmol/mL to 4.50 mmol/mL.

3. The preparation method of the polyol according to claim 1 , wherein in step (1), a concentration of the triethylene glycol in the solution B is 1.20 mmol/mL to 3.0 mmol/mL.

4. The preparation method of the polyol according to claim 1 , wherein in step (1), a concentration of the epoxy vegetable oil in the solution C is 0.15 mmol/mL to 0.40 mmol/mL.

5. A polyol prepared by the method according to claims 1 .

Assignees

• Nanjing University Of Technology

Inventors

• Guo Kai
• Fang Zheng
• Yang Man
• Tao Junjie
• Zhu Ning
• He Wei
• Chen Kequan
• Ouyang Pingkai

Classifications

• B01J19/0093

  Microreactors, e.g. miniaturised or microfabricated reactors (laboratory containers with capillary fluid transport in microfabricated channels or chambers B01L3/5027) · CPC title

• B01J2219/00889

  Mixing · CPC title

• C08G18/3203

  Polyhydroxy compounds · CPC title

• C08G18/246

  containing also tin-carbon bonds · CPC title

• C08G18/3206

  aliphatic · CPC title