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Polyetheramine and its preparation method

A technology of polyether amine and polyether, which is applied in the field of polyether amine and its preparation, can solve the problems such as the decrease of the average molecular weight of polyether chain polyether amine, affecting the application of polyether amine, and the widening of molecular weight distribution, so as to reduce fracture , Improve ammoniation conversion rate and narrow molecular weight distribution

Active Publication Date: 2020-02-07
SHANGHAI DONGDA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] At present, the production conditions of polyetheramine prepared by ammonolysis are harsh, not only high temperature and high pressure are required, but also the preparation of its catalyst is relatively complicated.
In the existing production process of polyetheramine, there is still a phenomenon that the average molecular weight of polyetheramine is reduced and the molecular weight distribution is broadened due to the breakage of polyether chain segment, which affects the application of polyetheramine in gasoline detergent.

Method used

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  • Polyetheramine and its preparation method
  • Polyetheramine and its preparation method
  • Polyetheramine and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] A) Preparation of polyether

[0057] In a pressure reactor, add 100 parts of nonylphenol and 0.2% KOH by weight of nonylphenol, replace the air in the kettle with nitrogen for 3 times, raise the temperature to 110°C, dehydrate for 30min in a vacuum environment below -0.09MPa, and then raise the temperature To 120°C, slowly feed propylene oxide, the molar ratio of propylene oxide to nonylphenol is 17:1, and the polymerization reaction is carried out at a pressure of 0.25MPa and a temperature of 130°C. After the feeding is completed, when the pressure in the reactor is When it does not decrease within 30min, the reaction ends and a crude polyether is produced; when the reactant is cooled to 90°C, add 85wt% phosphoric acid to neutralize to a pH value of 4.0, add an adsorbent magnesium silicate for adsorption, and then depressurize After distillation and dehydration, refined polyether is obtained after filtration. After chemical analysis, the molecular weight of the refine...

Embodiment 2

[0065] A) Preparation of polyether

[0066] In the pressure reactor, add 100 parts of dodecylphenol and 0.3% NaOH by weight of dodecylphenol, replace the air in the kettle with nitrogen for 3 times, raise the temperature to 110°C, and dehydrate in a vacuum environment below -0.09MPa 40min, then raise the temperature to 120°C, slowly feed in propylene oxide, the molar ratio of propylene oxide to dodecylphenol is 20:1, carry out the polymerization reaction at a pressure of 0.35MPa and a temperature of 140°C, and the feeding is over Finally, when the pressure in the reactor no longer drops within 30 minutes, the reaction ends and the crude polyether is generated; when the reactant is cooled to 90°C, 85wt% phosphoric acid is added to neutralize the pH to 5.0, and the adsorbent magnesium silicate is added Adsorption is carried out, and then dehydration is carried out by vacuum distillation, and refined polyether is obtained after filtration. After chemical analysis, the molecular ...

Embodiment 3

[0074] A) Preparation of polyether

[0075] In the pressure reactor, add 100 parts of isomerized tridecyl alcohol and isomeric tridecanol weight 0.25% NaOCH 3 , Replace the air in the kettle with nitrogen for 3 times, raise the temperature to 110°C, dehydrate for 50min in a vacuum environment below -0.09MPa, then raise the temperature to 120°C, slowly pass in propylene oxide, propylene oxide and isomeric tridecyl alcohol The molar ratio is 24:1, and the polymerization reaction is carried out at a pressure of 0.25MPa and a temperature of 145°C. After the feeding is completed, when the pressure in the reactor does not drop within 30 minutes, the reaction ends and a crude polyether is produced; the reactant When cooling to 80°C, add 85wt% phosphoric acid to neutralize to a pH value of 4.5, add an adsorbent magnesium silicate for adsorption, then distill and dehydrate under reduced pressure, and obtain refined polyether after filtration. After chemical analysis, the molecular wei...

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Abstract

The invention discloses polyether amine and a preparation method thereof. The preparation method comprises the steps as follows: (1) a framework nickel catalyst and a magnesium-aluminum composite oxide are used as a composite catalyst; (2) polyether, an amine compound and hydrogen are added for an ammoniation reaction; (3) a reaction product is subjected to gas-liquid separation, and a liquid material is mixed with the amine compound and hydrogen again for an ammoniation reaction after being subjected to dehydration and deamination; (4) a reaction product is cooled and subjected to gas-liquidseparation, a liquid material is subjected to dehydration and deamination, and polyether amine is obtained. The preparation method adopts relatively mild reaction conditions and has high conversion rate, chain segment breakage can be greatly reduced, and the prepared polyether amine has narrow molecular weight distribution. The polyether amine is particularly suitable to be used as a main component of a gasoline detergent and can effectively control production of fuel system and gas inlet system sediments and significantly reduce production of CCD (combustion chamber deposit).

Description

technical field [0001] The invention relates to a polyether amine and a preparation method thereof. Background technique [0002] Some unstable components such as olefins and aromatics contained in gasoline are easy to generate deposits in the fuel nozzles, intake valves and combustion chambers of the engine: carbon deposits in fuel nozzles (PFIDA), carbon deposits in intake valves and carbon deposits in combustion chambers, affecting The performance of the engine leads to the deterioration of the gasoline combustion process, the increase of fuel consumption, and the increase of exhaust pollutant emissions. This is an important reason for the current domestic smog. [0003] Adding effective detergents to gasoline is an effective way to improve the performance of automobile engines and control pollutant emissions. The fourth-generation gasoline detergent represented by polyisobutylene amine compounds can effectively remove the deposits formed on the engine injectors, intake ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G65/325C10L10/04
CPCC08G65/3255C08G2650/04C08G2650/10C10L10/04
Inventor 董建国何志强方洇冯刚
Owner SHANGHAI DONGDA CHEM