Preparation method for diethylene glycol mono-methyl ether composition of beta-cyclodextrin based naphthenic acid ester

A technology based on naphthenate and diethylene glycol, which is applied in the field of preparation of diethylene glycol monomethyl ether compositions, can solve the problems of corrosion of metal materials of fuel tanks, peeling of coatings of fuel tanks, blockage of fuel system pipelines, etc. The effect of increasing solubility and lowering freezing point

Inactive Publication Date: 2015-07-22
JILIN INST OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Jet fuel is inevitably mixed with a small amount of water during production and use. When the aircraft is flying at high altitude, the surrounding low temperature will cause the small amount of water contained in the fuel to condense into ice, causing blockage of the fuel system pipeline and eventually causing flight accidents
Diethylene glycol monomethyl ether is currently the only anti-icing agent approved for use in aircraft fuel systems by countries all over the world. However, it is easy to cause peeling off of the internal coating of the fuel tank and corrosion of the metal material of the fuel tank.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Weigh 17.9g of naphthenic acid and 28.4g of β-cyclodextrin into a 500mL three-neck flask, add 100g of dried N,N-dimethylformamide at the same time, stir until the reactants are completely dissolved, and then raise the temperature to 80 within 10min. ℃, reacted for 10 h, cooled the reactant to room temperature, washed fully with deionized water, separated layers, took the upper oil phase, put it in a drying oven at 60 °C for 1 h, and took it out to obtain β-cyclodextrin-based ring Alkanoate 15.3g.

Embodiment 2

[0013] Take 15.3g of β-cyclodextrinyl naphthenate and diethylene glycol monomethyl ether in a 50mL Erlenmeyer flask, stir at 60°C, and react with ultrasonic vibration for 4h to obtain β-cyclodextrinyl naphthenate Diethylene glycol monomethyl ether composition 28.6g.

[0014] The jet fuel freezing point test method (automatic phase inversion method) was used to test the oil samples provided by Chengdu Shuangliu Airport, and the amount of anti-icing agent added was 0.036% (volume percentage) of the tested oil samples. The test results show that the freezing point temperature of the diethylene glycol monomethyl ether composition of the β-cyclodextrinyl naphthenate is -58°C, and the freezing point temperature of the diethylene glycol monomethyl ether is -48°C.

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PUM

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Abstract

The invention relates to a diethylene glycol mono-methyl ether composition of beta-cyclodextrin based naphthenic acid ester. The composition is obtained by firstly reacting beta-cyclodextrin with naphthenic acid to obtain beta-cyclodextrin based naphthenic acid ester, then reacting the beta-cyclodextrin based naphthenic acid ester with diethylene glycol mono-methyl ether to obtain the diethylene glycol mono-methyl ether composition of beta-cyclodextrin based naphthenic acid ester. The technical scheme includes: weighing 17.9g of naphthenic acid and 28.4g of beta-cyclodextrin to carry out reaction in the N, N-dimethylformamide solvent at 80DEG C for 10h, then conducting washing, stratification and drying to obtain the beta-cyclodextrin based naphthenic acid ester, subjecting the beta-cyclodextrin based naphthenic acid ester and diethylene glycol mono-methyl ether of the same mass to ultrasonic oscillation reaction for 4h at 60DEG C, thus obtaining the diethylene glycol mono-methyl ether composition of beta-cyclodextrin based naphthenic acid ester. The preparation method of the diethylene glycol mono-methyl ether composition anti-icing agent of beta-cyclodextrin based naphthenic acid ester is simple, and has excellent anti-icing effect.

Description

Technical field [0001] The present invention involves a method for preparing a dilateyl monoethyl ether combinations for β-cyclopenidate. Background technique [0002] In the process of production and use, jet fuel is inevitably mixed with a small amount of water. When the aircraft is flying at high altitude, the surrounding low temperature will cause the trace hydraulic in the fuel to condense into ice, causing the fuel system pipeline to block, and eventually causes a flight accident.Timetal monocular ether is currently the only aircraft fuel system anti -fuel system that is approved by countries around the world. Invention content [0003] The purpose of the present invention is: In response to adverse effects such as the corrosion of fuel tanks caused by diol monotonetal, the β-cycloid alkanolate is provided to prepare the dietary alkyl alkate. [0004] In order to achieve the above goals, the present invention uses the following technical solutions: first prepare the β-cycl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L1/185C10L1/192C10L10/04C08B37/16
Inventor 谭乃迪陈哲金玉子邹长军张延林
Owner JILIN INST OF CHEM TECH
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