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Method for preparing vegetable oil polyalcohol by continuous process

A vegetable oil polyol, continuous process technology, applied in the field of continuous process preparation of vegetable oil polyol, can solve the problems of low product quality, inability to continuous production, long reaction time, etc., and achieve short reaction time, easy operation and control, and abundant sources Effect

Active Publication Date: 2015-04-01
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to overcome the long reaction time, high energy consumption, low product quality and non-continuous production of vegetable oil polyols existing in the production of vegetable oil polyols by the batch method based on the epoxy group ring-opening principle. A kind of method utilizing continuous method to prepare vegetable oil polyol

Method used

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  • Method for preparing vegetable oil polyalcohol by continuous process
  • Method for preparing vegetable oil polyalcohol by continuous process
  • Method for preparing vegetable oil polyalcohol by continuous process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Dissolve 200mL epoxy olive oil in 600mL tetrahydrofuran to make component A, and dissolve 13mL sulfuric acid in 240mL water to make component B, and pump them into the microchannel modular reaction device at the same time. The reaction was carried out in , the injection rates of A and B components were 2.8mL / min and 0.9mL / min respectively, and the reaction residence time was kept for 10min. 2 CO 3 The aqueous solution was washed until neutral, and then liquid separation and rotary evaporation were performed to obtain olive oil polyol with a hydroxyl value of 222 mgKOH / g.

Embodiment 2

[0032] Dissolve 200mL epoxy peanut oil in 1000mL tetrahydrofuran to make component A, and dissolve 20mL fluoboric acid in 440mL water to make component B, and pump them into the microchannel modular reaction device at the same time, in the sandwich reactor HC at normal pressure and 80°C The reaction was carried out in , the injection rates of A and B components were 5.3mL / min and 2.1mL / min respectively, and the reaction residence time was kept for 5min. 2 CO 3 The aqueous solution was washed to neutrality, and then the peanut oil polyol was obtained through liquid separation and rotary evaporation, and its hydroxyl value was 265 mgKOH / g.

Embodiment 3

[0034] Dissolve 200mL epoxy rapeseed oil in 700mL tetrahydrofuran to make component A, and dissolve 20mL sulfuric acid in 600mL water to make component B, and pump them into the microchannel modular reaction device at the same time. The reaction was carried out in an alloy microchannel reactor. The injection rates of A and B components were 3.4mL / min and 2.3mL / min respectively, and the reaction residence time was kept at 3.5min. Phase with 5%Na 2 CO 3 The aqueous solution was washed until neutral, and then liquid separation and rotary steaming were performed to obtain rapeseed oil polyol with a hydroxyl value of 222 mgKOH / g.

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Abstract

The invention discloses a method for preparing vegetable oil polyalcohol by a continuous process, which comprises the following steps: dissolving epoxy vegetable oil in an organic solvent, simultaneously pumping the epoxy vegetable oil dissolved in organic solvent and a catalyst water solution into a microchannel modular reactor, reacting at 30-100 DEG C under normal pressure for 2-12 minutes, standing the reaction product, skimming, recovering the water phase, washing the oil phase with an Na2CO3 water solution to a neutral state, skimming, and carrying out rotary evaporation to obtain the vegetable oil polyalcohol. The preparation method disclosed by the invention is operated continuously, and has the advantages of controllable preparation technique, short reaction time, green and environment-friendly raw materials, abundant sources, small pollution due to recyclable wastewater and organic solvent, low energy consumption, weakened side reaction, and wide controllable hydroxyl value of the product. The production plant is simple and easy to disassemble and assemble and convenient to carry and move, can be adjusted by simply increasing or decreasing the quantity of microchannels, and does not have the scale-up effect similar to industrial production.

Description

technical field [0001] The invention relates to a method for preparing vegetable oil polyols, in particular to a method for preparing vegetable oil polyols by using a continuous method with epoxy vegetable oil as a raw material. Background technique [0002] With the increase of petroleum consumption, the decrease of petrochemical resource reserves and the continuous rise of petrochemical product prices, people pay more and more attention to the use of renewable resources to produce materials and fuels, and the use of renewable resources as raw materials for chemical products has attracted people's attention. Vegetable oil polyols are substitutes for petroleum-based polyols with outstanding environmental protection value. According to biosphere analysis data, compared with petroleum-based polyols, the overall energy consumption of vegetable oil polyols is reduced by 23%, the consumption of non-renewable resources is reduced by 61%, and the emission of greenhouse gases into t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C69/675C07C67/31
Inventor 郭凯方正季栋欧阳平凯
Owner NANJING TECH UNIV