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Catalyst, preparation method thereof and method for reducing aldehyde content in polyether polyol

A technology of polyether polyols and polyether polyols, applied in the direction of heterogeneous catalyst chemical elements, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as bad odor and poor removal effect, and achieve high Effects of molecular weight, low aldehyde content, and low odor

Pending Publication Date: 2022-05-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the problem that aldehydes and ketones are simultaneously generated during the synthesis of polyether polyols and have bad odors, the existing technology for reducing aldehydes has the problem of poor removal effect

Method used

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  • Catalyst, preparation method thereof and method for reducing aldehyde content in polyether polyol
  • Catalyst, preparation method thereof and method for reducing aldehyde content in polyether polyol
  • Catalyst, preparation method thereof and method for reducing aldehyde content in polyether polyol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042]Put 60 mL of 1.2M aqueous sodium bicarbonate solution into flask A as an aqueous solution. Add 241.6g of copper nitrate, 297.49g of zinc nitrate, 375.13g of aluminum nitrate and 89g of manganese nitrate into 240mL of ethylene glycol in flask B (the molar ratio of copper, zinc, aluminum, and manganese is 3:3:1:0.5 ). Stir flask B while heating at about 69°C, and slowly add the solution in flask A to flask B with a syringe pump at a rate of 8 mL / min for about 13 minutes. After the mixing is complete, the stirring is continued for 2 hours and the heating is about 70°C. Subsequently, the precipitate formed in bottle B was washed using a vacuum filter and washed 3 times with 300 ml of triple distilled water to dry the precipitate at 105 °C for 48 hr. The obtained powder was sintered in a muffle furnace at 350° C. for 3 hours, and the powder was chipped. The size of the catalyst chip was 3 mm×3 mm to obtain the final catalyst product.

[0043] The temperature-programmed red...

Embodiment 2

[0045] According to the method of Example 1, the difference is that the molar ratio of copper, zinc, aluminum and manganese is 3:3:1:0.2 to finally obtain the final catalyst product. And the temperature-programmed reduction temperature of the catalyst was measured to be 150°C.

Embodiment 3

[0047] According to the method of Example 1, the difference is that the molar ratio of copper, zinc and aluminum is 3:3:1, (does not contain manganese). Finally, the final catalyst product is obtained. The temperature-programmed reduction temperature of the catalyst is 144°C

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Abstract

The invention discloses a catalyst, a preparation method thereof and a method for reducing the content of aldehyde in polyether polyol. The catalyst comprises copper and an oxide thereof, zinc and an oxide thereof, and aluminum and an oxide thereof; the molar ratio of copper to zinc to aluminum is (2-5): (2-5): 1 based on the copper element, the zinc element and the aluminum element. The method for reducing the content of the aldehyde in the polyether polyol comprises the step of reacting the polyether polyol containing the aldehyde with hydrogen in the presence of the catalyst or the catalyst obtained by the preparation method. When the catalyst is used for hydrotreating aldehyde-containing polyether polyol, the content of aldehyde in the polyether polyol can be remarkably reduced.

Description

technical field [0001] The invention relates to a catalyst for reducing the aldehyde content in polyether polyol and a preparation method thereof, as well as a method for reducing the aldehyde content in polyether polyol. Background technique [0002] Polyether polyol is one of the main raw materials for the synthesis of polyurethane materials. There are many preparation methods of polyether polyols, mainly including anionic polymerization, cationic polymerization and coordination polymerization. [0003] CN104004177A relates to a method for preparing polyether polyol, which is a method for preparing polyether polyol with a block polyether chain structure in a solvent-free manner based on a polymer compound that is solid at room temperature. Specifically, it is an anionic polymerization, using an inorganic strong base (such as KOH) as a catalyst. The inorganic strong base has the advantages of being cheap and easy to remove in polyether polyols, and is widely used in the pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/80B01J35/02B01J23/889C08G65/30B01J35/00
CPCB01J23/80B01J23/002B01J23/8892C08G65/30B01J2523/00B01J35/40B01J2523/17B01J2523/27B01J2523/31B01J2523/72
Inventor 施晓秋刘仲能余强刘东东
Owner CHINA PETROLEUM & CHEM CORP
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