Refining method of low-odor and high-activity polyether polyol

A high-activity polyether and polyether polyol technology, which is applied in the field of polyether polyol, can solve the problems of prolonging the reaction cycle, increasing the purchase cost, and prolonging the production cycle, so as to reduce the content of aldehydes, shorten the processing time, Effect of reducing product odor

Active Publication Date: 2017-06-13
SHANDONG INOV NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to remove the alkali metal catalyst in the refining process, phosphoric acid and water are used to neutralize the salt, and then the alkali metal ions are removed with an adsorbent, but side reactions are likely to occur in an acidic environment, resulting in aldehydes (formaldehyde, acetaldehyde, Acrolein, etc.), ketones, allyl alcohol and other substances, which will bring a strong odor to the final product during product use
Although some companies have tried some methods to remove polyether odor, the effect is not obvious: such as strict requirements on raw material indicato

Method used

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  • Refining method of low-odor and high-activity polyether polyol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Add 36.8g of glycerin and 3.76g of KOH into a 2.5L autoclave at room temperature, raise the temperature to 110°C, vacuum dehydrate for 4 hours, slowly add 1468g of propylene oxide, control the reaction temperature at 110-115°C, and the reaction pressure is less than 0.20MPa, and carry out polymerization Reaction, then fill nitrogen to 0.30MPa, internal pressure reaction for 3h, then slowly add 376g of ethylene oxide, control reaction temperature 110-115°C, reaction pressure less than 0.20MPa, carry out polymerization reaction, then fill nitrogen to 0.30MPa, internal pressure React for 1 h, then vacuum degassing for 1 h to obtain 1880 g of highly active crude polyether polyol.

[0021] Transfer the high-activity crude polyether polyol obtained above to a refining treatment tank, stir and control the temperature to 80°C, add 18.8g of water, keep stirring at 80°C for 0.5h, then add 18.8g of acid magnesium silicate, and use nitrogen to Pressurize to 0.1MPa, keep stirring at...

Embodiment 2

[0023] Add 36.8g of glycerin and 6.6g of KOH into a 2.5L autoclave at room temperature, raise the temperature to 110°C, vacuum dehydrate for 5 hours, slowly add 1767.2g of propylene oxide, control the reaction temperature at 110-115°C, and the reaction pressure is less than 0.20MPa. Polymerization reaction, then fill nitrogen to 0.30MPa, internal pressure reaction for 3h, then slowly add 396g of ethylene oxide, control reaction temperature 110-115°C, reaction pressure is less than 0.20MPa, carry out polymerization reaction, then fill nitrogen to 0.30MPa, internal Pressure reaction for 1 h, and then vacuum degassing for 1 h to obtain 2200 g of highly active crude polyether polyol.

[0024] Transfer the high-activity crude polyether polyol obtained above to a refining treatment tank, stir and control the temperature to 90°C, add 88g of water, keep stirring at 90°C for 1 hour, raise the temperature to 100°C, add 44g of acid magnesium silicate, and use Nitrogen press to 0.2MPa, ke...

Embodiment 3

[0026] Add 30.7g of glycerin and 4.69g of KOH into a 2.5L autoclave at room temperature, raise the temperature to 110°C, vacuum dehydrate for 6 hours, slowly add 1782.7g of propylene oxide, control the reaction temperature at 110-115°C, and the reaction pressure is less than 0.20MPa, and carry out Polymerization reaction, then fill nitrogen to 0.30MPa, internal pressure reaction for 3h, then slowly add 320g of ethylene oxide, control reaction temperature 110-115°C, reaction pressure is less than 0.20MPa, carry out polymerization reaction, then fill nitrogen to 0.30MPa, internal Pressure reaction for 1 h, followed by vacuum degassing for 1 h to obtain 2130 g of highly active crude polyether polyol.

[0027] Transfer the high-activity crude polyether polyol obtained above to a refining treatment tank, stir and control the temperature to 70°C, add 54g of water, keep stirring at 70°C for 1 hour, then raise the temperature to 110°C, add 32g of acid magnesium silicate, Stamp it with...

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Abstract

The invention relates to a refining method of low-odor and high-activity polyether polyol, and belongs to the technical field of polyether polyol. The refining method comprises the following steps of adding high-activity crude polyether polyol into a refining treatment kettle, and adding water to stir; under the condition of nitrogen pressure filling, adding a refining adsorbent A to stir, then adding a refining adsorbent B to stir, dewatering, drying and filtering, so as to obtain the low-odor and high-activity polyether polyol. Compared with the traditional refining technology of using phosphoric acid and water and adding one or two types of common adsorbent, the refining method has the advantages that the high-activity crude polyester is refined under the matching action of acid magnesium silicate, synthetic magnesium silicate and water, so that the alkaline metal ion can be removed like the conventional technology, and the polyester index and parameter meet the national standard; the two types of refining adsorbents are slightly weak acid, so that the new aldehyde and other impurities are not produced in the refining phase, the content of aldehyde matters is reduced, and the product odor is decreased.

Description

technical field [0001] The invention relates to a method for refining polyether polyols with low odor and high activity, and belongs to the technical field of polyether polyols. Background technique [0002] Polyether polyol (referred to as polyether) is one of the main raw materials for the synthesis of polyurethane resin, and highly reactive polyether polyol is one of the most widely used types of polyether polyol, it has the characteristics of high reactivity, and the prepared The product has excellent performance and comfortable body feeling, so it is more and more used in articles that come into contact with the human body, such as mattresses, neck pillows, etc. At present, in addition to the performance requirements of the product, the requirements for its smell are also getting higher and higher. Highly active polyether polyols generally use glycerin as the starting agent, under the action of an alkali metal catalyst, with epoxide (propylene oxide, ethylene oxide or ...

Claims

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Application Information

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IPC IPC(8): C08G65/30C08G18/48
CPCC08G18/48C08G65/30
Inventor 王玉孙兆任杨凯李剑锋周玉波
Owner SHANDONG INOV NEW MATERIALS CO LTD
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