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Solid base catalyst for synthesizing alkanolamide type compound and preparation method thereof

A solid base catalyst, alkanolamide technology, applied in catalyst activation/preparation, preparation of organic compounds, preparation of carboxylic acid amides, etc., can solve the problems of alkanolamide compounds, etc., and achieve the effect of good surface activity

Inactive Publication Date: 2009-08-19
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of hydrotalcites as solid base catalysts in the synthesis of alkanolamides has no relevant literature or application reports.

Method used

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  • Solid base catalyst for synthesizing alkanolamide type compound and preparation method thereof
  • Solid base catalyst for synthesizing alkanolamide type compound and preparation method thereof
  • Solid base catalyst for synthesizing alkanolamide type compound and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Prepare 250ml of mixed aqueous salt solution of magnesium nitrate and aluminum nitrate with deionized water, wherein the concentration of magnesium is 0.8mol / L, and the concentration of aluminum is 0.4mol / L; another 250ml of mixed sodium hydroxide and sodium carbonate Alkali solution, wherein, the concentration of sodium hydroxide is 1.9 mol / liter, and the concentration of sodium carbonate is 0.8 mol / liter. After supersonicating the mixed salt solution and alkali solution for 10 minutes, transfer the above two mixed solutions into a colloid mill for reaction, the voltage is 140V, 4500rpm, and the reaction time is 2-3min. Reflux and crystallize for 5 hours, then centrifugally wash the resulting slurry with deionized water to a pH range of 7-8, then dry at 100°C for 24 hours, grind, and then bake in an atmosphere furnace at 500°C for 15 hours, then put Hydrate in carbon dioxide water for 8 hours, and then vacuum dry at 40°C for 24 hours to prepare a magnesium-aluminum hyd...

Embodiment 2

[0040] In a 100ml Teflon container or glass container, Mg(NO 3 )2.6H 2 O and Al(NO 3 )3.9H 2 O was dissolved in 75ml of deionized water at a molar ratio of 2:1 to prepare a solution with a total concentration of 0.3M. Add urea according to the ratio of urea / NO3-=4.0 and dissolve it, seal the container, and react at a constant temperature at 90°C for 3 days, after the solution is cooled, filter and wash the white precipitate obtained, and dry at 100°C for 24h to obtain Magnesium aluminum carbonate hydrotalcite, ground, then placed in an atmosphere furnace and roasted at 500°C for 15 hours, then placed in decarbonated water for 8 hours, and then vacuum-dried at 40°C for 24 hours to obtain a solid magnesium-aluminum hydrotalcite Alkali catalyst, its chemical composition is [Mg 2 Al(OH) 6 ](OH - )·2H 2 O.

[0041] Get methyl stearate 14.925g, monoethanolamine 3.36g, catalyzer 0.915g, put into 100ml there-necked flask, react in 140 ℃ of oil baths after 4 hours, take a sampl...

Embodiment 3

[0043] Prepare 250ml of mixed aqueous salt solution of magnesium nitrate and aluminum nitrate with deionized water, wherein the concentration of magnesium is 1.2mol / L, and the concentration of aluminum is 0.4mol / L; another 250ml of mixed sodium hydroxide and sodium carbonate Alkali solution, wherein, the concentration I of sodium hydroxide is 2.56mol / L, and the concentration of sodium carbonate is 0.8mol / L. After supersonicating the mixed salt solution and alkali solution for 10 minutes, transfer the above two mixed solutions into a colloid mill for reaction, the voltage is 140V, 4500rpm, and the reaction time is 2-3min. Reflux and crystallize for 5 hours, then centrifugally wash the resulting slurry with deionized water to a pH range of 7-8, then dry at 100°C for 24 hours, grind, and then bake in an atmosphere furnace at 500°C for 15 hours, then put Hydrate in decarbonated water for 8 hours, and then vacuum-dry at 40° C. for 24 hours to prepare a magnesium-aluminum hydrotalci...

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Abstract

The invention relates to a solid base catalyst for synthesizing alkanolamide compounds and a preparation method thereof, and belongs to the technical field of solid base catalyst. Magnalium hydrotalcite is taken as a precursor of the catalyst and used to prepare the solid base catalyst through calcination and rehydration, and the formulation of the magnalium hydrotalcite solid base catalyst is Mg1-xAlx(OH)2(OH-)x.mH2O. The alkanolamide compounds are reaction products, have good surface activity, are one of the most important varieties of non-ionic surface active agents, are important active monomers of a modern synthetic detergent, and are widely applied to detergents, foam stabilizers, thickeners, softening agents, anti-rust agents, antistatic agents, and the like.

Description

technical field [0001] The invention belongs to the technical field of solid base catalysts, in particular to a solid base catalyst for catalytically synthesizing alkanolamide compounds and a preparation method thereof. Background technique [0002] Biodiesel, also known as fatty acid methyl ester, is a new type of biomass fuel and a high-quality substitute for fossil fuels. Its superior performance, environmental friendliness and renewability have attracted attention. However, its high cost hinders the industrialization process of biomass fuel. Increasing profits by producing high value-added chemical products is a hot topic in current research. Oil derivatives made from natural fatty acids to synthesize alkanolamides. Not only can waste be turned into treasure, but also the obtained product has excellent performance, good biodegradability, little pollution and good use safety. [0003] Alkanolamide is a new type of nonionic surfactant, light yellow solid, non-toxic and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/04B01J21/10B01J35/02C07C233/18C07C231/02C11D1/66B01J35/00
CPCB01J21/10B01J37/0036C07C231/02C07C233/18B01J23/007
Inventor 张法智李海艳卢伟徐赛龙雷晓东段雪
Owner BEIJING UNIV OF CHEM TECH
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