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Method for producing alkyl diglycol

A technology of alkyl diethylene glycol and alkylene oxide, which is applied to the preparation of ether from alkylene oxide, ether preparation, chemical instruments and methods, etc., can solve the problems of slow reaction speed and unsuitability for continuous production process, and improve the reaction speed Effect

Inactive Publication Date: 2020-05-26
LOTTE CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since this catalyst is a heterogeneous catalyst in the form of complex oxides, it is not suitable for continuous production processes
In addition, aluminum alkoxide catalysts, which are homogeneous catalysts, exhibit NRE effects, but have the problem of significantly slow reaction rates

Method used

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  • Method for producing alkyl diglycol
  • Method for producing alkyl diglycol

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preparation example Construction

[0019] The invention relates to a preparation method of alkyl diethylene glycol, which comprises the following reaction: in the presence of an aluminum-based catalyst selected from aluminum-based compounds or hydrates thereof, the alcohol is reacted with alkylene oxide.

[0020] According to an implementation example, the present invention provides a method for preparing diethylene glycol butyl ether (butyl diglycol), comprising the following reaction: in the presence of a catalyst selected from aluminum potassium sulfate or its hydrate, butanol and epoxy ethane reaction.

[0021] The aluminum-based catalyst is an aluminum-based catalyst containing an alkali metal (group 1 metal of the chemical periodic table) or an alkaline earth metal (group 2 metal of the chemical periodic table). According to an implementation example, the aluminum-based catalyst is potassium aluminum sulfate or a hydrate thereof.

[0022] The alcohol may be selected from alkyl alcohols having 1 to 6 carb...

Embodiment

[0031] Embodiment (using potassium aluminum sulfate catalyst alone)

[0032] The butanol of 500g, the aluminum potassium sulfate of 0.1g and the oxirane of 50g join in the autoclave reactor, and at 5kg / cm 2 The mixture was stirred for 24 hours at a pressure of G and a temperature of 170° C. to react. The obtained product was analyzed by GC (50°C→10°C / min→300°C, Hold), and the amount of each component in the product produced over the reaction time is shown in Table 1 below.

[0033] [Table 1]

[0034] [weight%]

[0035] 3 hours 6 hours 9 hours 12 hours 24 hours BG 93.1 92.3 92.2 91.9 91.7 BDG 6.63 7.30 7.37 7.74 7.82 BTG 0.32 0.37 0.40 0.37 0.41 B4G 0 0.04 0 0.02 0.02

[0036] *BG: Ethylene glycol butyl ether

[0037] *BDG: Diethylene glycol butyl ether

[0038] *BTG: Triethylene glycol butyl ether

[0039] *B4G: Tetraethylene glycol butyl ether

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Abstract

Disclosed is a method for producing alkyl diglycol in the presence of a novel aluminum catalyst containing alkali metals or alkaline earth metals that has NRE effect (Narrow distribution of ethoxylates) and increased reaction speed.

Description

technical field [0001] The invention relates to a method for preparing alkyl diethylene glycol (ALKYL DIGLYCOL) in the presence of a novel aluminum-based catalyst. In more detail, the present invention relates to a method for preparing alkyldiethylene glycol in the presence of a novel aluminum-based catalyst, which has the effect of NRE (narrow range ethoxylate, narrow molar distribution) while increasing the reaction speed . Background technique [0002] The invention relates to a method for preparing alkyl diethylene glycol from alcohol and alkylene oxide. [0003] As an example, the reaction for producing diethylene glycol butyl ether from butanol and ethylene oxide (EO) is as follows. [0004] [0005] As an aluminum catalyst widely used in the above reaction, there is known a Mg-Al catalyst exhibiting selectivity (NRE effect) to the addition of 2 moles of alkylene oxide. However, since this catalyst is a heterogeneous catalyst in the form of a composite oxide, it ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C41/03C07C43/13B01J27/055
CPCB01J27/055C07C41/03C07C43/13
Inventor 黄素罗郑浚教李中源崔诚桓
Owner LOTTE CHEM CORP