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Preparation method of 4-tert-Butylbenzenesulfonamide-type concrete foaming agent

A technology of p-tert-butylbenzenesulfonamide type and tert-butylbenzenesulfonamide type is applied in the field of foam concrete manufacturing, which can solve the problems of small foaming ratio and weak stability, and achieve easy operation, simple process, The effect of simple preparation process

Active Publication Date: 2018-05-08
舒浪平 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem actually solved by the present invention is: to solve the problem that the foaming ratio of the existing synthetic concrete foaming agent is small and the stability is not strong. Preparation of a p-tert-butylbenzenesulfonamide-type concrete foaming agent from ethylenediamine

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Preparation of intermediates: put p-tert-butylbenzenesulfonyl chloride, stearoyl chloride and hydroxyethylethylenediamine in a molar ratio of 1.0:0.15:1.1 into the reaction vessel, and then add moles of p-tert-butylbenzene 9.0 times the amount of sulfonyl chloride as a solvent toluene, stirred and refluxed at 120°C for 2 hours, cooled, and removed the solvent by rotary evaporation. The obtained solid was washed twice with absolute ethanol and dried to obtain a light yellow powdery solid, which is the intermediate body;

[0023] (2) prepare p-tert-butylbenzenesulfonamide type concrete foaming agent: according to intermediate: chloroacetic acid: the mol ratio of sodium hydroxide is that the proportioning of 1:1.1:2.2 gets intermediate, chloroacetic acid, sodium hydroxide, Dissolve chloroacetic acid and sodium hydroxide in water and prepare an aqueous solution of sodium chloroacetate with a concentration of 18% by mass; put the intermediate into a reaction vessel and r...

Embodiment 2

[0025] (1) Preparation of intermediates: put p-tert-butylbenzenesulfonyl chloride, stearoyl chloride and hydroxyethylethylenediamine in a molar ratio of 1.0:0.1:1.5 into the reaction vessel, and then add moles of p-tert-butylbenzene 5.0 times the amount of sulfonyl chloride as a solvent toluene, stirred and refluxed at 100°C for 5 hours, cooled, and removed the solvent by rotary evaporation. The obtained solid was washed 4 times with absolute ethanol and dried to obtain a light yellow powdery solid, which is the intermediate body;

[0026] (2) prepare p-tert-butylbenzenesulfonamide type concrete foaming agent: according to intermediate: chloroacetic acid: the mol ratio of sodium hydroxide is that the proportioning of 1:1.3:2.6 gets intermediate, chloroacetic acid, sodium hydroxide, Dissolve chloroacetic acid and sodium hydroxide in water and prepare an aqueous solution of sodium chloroacetate with a concentration of 10% by mass; put the intermediate into a reaction vessel and ...

Embodiment 3

[0028] (1) Preparation of intermediates: put p-tert-butylbenzenesulfonyl chloride, stearoyl chloride and hydroxyethylethylenediamine in a molar ratio of 1.0:0.1:1.4 into the reaction vessel, and then add moles of p-tert-butylbenzene 7.0 times the amount of sulfonyl chloride as a solvent toluene, stirred and refluxed at 105°C for 4 hours, cooled, and removed the solvent by rotary evaporation. The obtained solid was washed 3 times with absolute ethanol and dried to obtain a light yellow powdery solid, which is the intermediate body;

[0029] (2) prepare p-tert-butylbenzenesulfonamide type concrete foaming agent: according to intermediate: chloroacetic acid: the mol ratio of sodium hydroxide is 1:1.2:2.4 proportioning to get intermediate, chloroacetic acid, sodium hydroxide, will Dissolve chloroacetic acid and sodium hydroxide in water and prepare an aqueous solution of sodium chloroacetate with a concentration of 20% by mass; put the intermediate into a reaction vessel and raise...

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Abstract

The invention discloses a preparation method of a 4-tert-Butylbenzenesulfonamide-type concrete foaming agent. The method comprises the steps that 4-tert-Butylbenzenesulfonyl chloride, stearoyl chloride and hydroxyethyl ethylenediamine are put into a methylbenzene solvent, stirred, subjected to reflux reaction, cooled and subjected to rotary evaporation to remove the solvent, and after washing anddrying, a faint yellow powdery intermediate is obtained; then the intermediate is added to a sodium monochloroacetate aqueous solution for heating reaction, cooled and filtered, insoluble substances are removed, and the filtrate is an end product, namely the 4-tert-Butylbenzenesulfonamide-type concrete foaming agent. The prepared 4-tert-Butylbenzenesulfonamide-type concrete foaming agent can be used as the concrete foaming agent without separation and purification, and the preparation technology is simple, simple in process, easy to operate and high in practicability.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a preparation method of p-tert-butylbenzenesulfonamide concrete foaming agent, which is mainly applicable to the manufacture of foamed concrete. Background technique [0002] At present, the country is vigorously advocating the reform of building energy saving and wall energy saving. In recent years, foam concrete has attracted widespread attention from the whole society due to its environmental protection, energy saving, good thermal insulation performance, and beneficial to the recycling of solid waste. In the prior art, commonly used concrete foaming agents mainly include: rosin resins, synthetics, proteins, composites, etc., the main components of which are one or more surfactants. Rosin resin concrete foaming agent can only be used for density greater than 600kg / m2 because of its unsatisfactory foam stability and expansion ratio. 3 The above medium an...

Claims

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Application Information

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IPC IPC(8): C04B24/20C07C311/18C07C303/38C07C303/40C04B103/42
CPCC04B24/20C04B2103/42C07C303/38C07C303/40C07C311/18
Inventor 陈良培
Owner 舒浪平
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