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Polyol as well as preparation method and application thereof

A polyol and ring-opening reaction technology, which is applied in the preparation of carboxylic acid esters, chemical instruments and methods, and the preparation of organic compounds, and can solve the problems of cumbersome preparation process, complex content of side reaction products, and high viscosity

Active Publication Date: 2022-05-24
NANTONG HAIERMA TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] But at present, most vegetable oil polyols are produced by epoxidation or transesterification of oil, and then ring-opening reaction with petroleum-based products such as alcohol and glycerin. The process is cumbersome, the side reaction products are complex and high in content, and the prepared vegetable oil polyol has a relatively high viscosity. The viscosity at 25°C is usually as high as several thousand or even tens of thousands, which is not conducive to the subsequent processing and application of polyols.

Method used

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  • Polyol as well as preparation method and application thereof
  • Polyol as well as preparation method and application thereof
  • Polyol as well as preparation method and application thereof

Examples

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preparation example Construction

[0023] The invention provides a preparation method of polyol, comprising the following steps:

[0024] Under catalyst conditions, the epoxidized vegetable oil and hydrogen are subjected to a ring-opening reaction to obtain the polyol;

[0025] The catalyst comprises a nickel-based catalyst and an epoxidized vegetable oil on the surface of the nickel-based catalyst, and the epoxidized vegetable oil in the catalyst is the same as the epoxidized vegetable oil for ring-opening reaction;

[0026] The temperature of the ring-opening reaction is 140-180° C., and the reaction pressure is 0.4-0.8 Mpa.

[0027] In the present invention, unless otherwise specified, the components in the preparation method are all commercially available products well known to those skilled in the art.

[0028] In the present invention, under catalyst conditions, the epoxidized vegetable oil and hydrogen are subjected to a ring-opening reaction to obtain the polyol.

[0029] In the present invention, the...

Embodiment 1

[0049] The catalyst used includes a nickel-based catalyst and epoxidized soybean oil on the surface of the nickel-based catalyst, wherein the nickel-based catalyst is a spherical shape with a particle size of 4 mm, and includes a carrier natural diatomite and a nickel element supported on the carrier. The mass fraction of nickel element in the catalyst is 22%, and the mass ratio of the nickel-based catalyst to the epoxidized soybean oil on the surface of the nickel-based catalyst is 1:0.5;

[0050] Add 500g epoxidized soybean oil (epoxy value 6.20%) and 1g catalyst to the autoclave successively, and seal the autoclave; after leak detection to ensure that the autoclave is sealed, replace the gas in the autoclave three times with hydrogen, then Set the reaction temperature to 160 °C, feed hydrogen to 0.6 MPa under stirring conditions, and gradually start the reaction as the temperature rises. When the pressure drops to 0.4 MPa, replenish hydrogen to 0.6 MPa in time; when the pres...

Embodiment 2

[0056] The catalyst used includes a nickel-based catalyst and epoxy rapeseed oil on the surface of the nickel-based catalyst, wherein the nickel-based catalyst is an ellipsoid with a particle size of 4 mm, and includes a carrier clay and a nickel element supported on the carrier. The nickel-based catalyst The mass fraction of the nickel element in the medium is 20%, and the mass ratio of the nickel-based catalyst and the epoxy rapeseed oil on the surface of the nickel-based catalyst is 1:0.3;

[0057] Add 500g epoxy rapeseed oil (epoxy value 5.85%) and 1.5g catalyst to the autoclave successively, and seal the autoclave; after checking for leaks to ensure that the autoclave is sealed, replace the gas in the autoclave three times with hydrogen , and then set the reaction temperature to 140 °C, feed hydrogen to 0.6 MPa under stirring conditions, and gradually start the reaction as the temperature rises. When the pressure drops to 0.4 MPa, add hydrogen to 0.6 MPa in time; when the ...

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Abstract

The invention belongs to the technical field of organic synthesis, and particularly relates to polyol as well as a preparation method and application thereof. The preparation method of the polyol provided by the invention comprises the following step: under the condition of a catalyst, carrying out ring-opening reaction on epoxidized vegetable oil and hydrogen to obtain the polyol, the catalyst comprises a nickel-based catalyst and epoxidized vegetable oil on the surface of the nickel-based catalyst, and the epoxidized vegetable oil in the catalyst is the same as the epoxidized vegetable oil subjected to ring-opening reaction; the temperature of the ring-opening reaction is 140 to 180 DEG C, and the reaction pressure is 0.4 to 0.8 Mpa. In the invention, in the presence of proper reaction pressure, reaction temperature and catalyst, the epoxy bond of the epoxidized vegetable oil and hydrogen are subjected to ring-opening reaction, the ring-opening reaction is performed on the epoxy bond through hydrogenation reaction, and one epoxy bond only generates one hydroxyl group, so that the probability that the opened hydroxyl group and other molecules are subjected to ring-opening, polymerization and other side reactions is reduced; and the obtained polyol has low viscosity.

Description

technical field [0001] The invention belongs to the technical field of organic synthesis, and particularly relates to a polyol and a preparation method and application thereof. Background technique [0002] Polyurethane is prepared by the ring-opening reaction of polyether or polyester polyol and polyisocyanate, followed by chain extension reaction with chain extender. For a long time, most of the raw materials for preparing polyols are petroleum-derived products, which are too dependent on non-renewable and non-biodegradable petroleum resources, and cause irreversible damage to the environment. Natural oils and fats are currently recognized and the only renewable petroleum substitutes, among which the comprehensive properties of vegetable oils are the most ideal. The reaction between vegetable oil polyols prepared from vegetable oil and isocyanates can introduce natural macromolecules that can be decomposed by microorganisms into polyurethane, which can not only solve the ...

Claims

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Application Information

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IPC IPC(8): C07C67/31C07C69/675C07C69/732C07D303/42C07D301/00C11C3/12C08G18/36C09J175/04
CPCC07C67/31C07C69/675C07C69/732C07D303/42C07D301/00C11C3/123C08G18/36C09J175/04C08G2101/00Y02P20/584
Inventor 曹志亮毋亭亭张莉春蔡启宏邓健能
Owner NANTONG HAIERMA TECH CO LTD
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