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Cement grinding aid composition by taking glycerinum distillation residues as main raw material as well as preparation method and application thereof

A technology of cement grinding aid and distillation residue, applied in the field of cement grinding aid composition, can solve the problems of poor grinding aid effect and the like, and achieve the effects of more full utilization, high utilization, good grinding aid and enhancement effect

Inactive Publication Date: 2015-08-05
LINYI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in this type of mixed alcohol products currently on the market, polymerized glycerin only accounts for 10%-20%, glycerin accounts for 20%-40%, and the rest is an aqueous solution containing a small amount of sodium chloride. Pure glycerin is used as a grinding aid for cement grinding aids. The effect is poor. How to convert the glycerol in the glycerin distillation residue into polymerized glycerol to achieve higher and more full utilization is the main technical problem to be solved

Method used

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  • Cement grinding aid composition by taking glycerinum distillation residues as main raw material as well as preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0031] During the production process of chemically synthesizing glycerin in a factory, the mass composition of the glycerin distillation residue discharged is 35% sodium chloride, 18% glycerin, 8% polymerized glycerin, and the balance is water.

[0032] Step a): Get 1000g of glycerin distillation residue, centrifuge to remove most of the sodium chloride, take 500g of the separated liquid phase I, add 1500g of absolute ethanol, after fully stirring, filter off the inorganic salts to obtain the liquid phase II, and use Ethanol is distilled off under normal pressure in the distiller until the mixture has a constant weight to obtain a mixture A whose main component is glycerol and polyglycerol;

[0033] Step b): Take 100 g of the mixture A obtained in step a) and add it to the reaction kettle, insert a copper wire with a diameter of 2 mm in the kettle, and insert the copper wire into the reaction medium, then add 1 g of sodium carbonate as a catalyst, turn on the nitrogen protectio...

Embodiment 2

[0040] During the production process of chemically synthesizing glycerin in a certain factory, the mass composition of the glycerin distillation residue excluded is 20% sodium chloride, 20% glycerin, 10% polymerized glycerin, and the balance is water.

[0041] Step a): Get 1000g of glycerin distillation residue, centrifuge to remove most of the sodium chloride, take 500g of the separated liquid phase I, add 2000g of absolute ethanol, after fully stirring, filter off the inorganic salts to obtain the liquid phase II, and use Ethanol is distilled off under normal pressure in the distiller until the mixture has a constant weight to obtain a mixture A whose main component is glycerol and polyglycerol;

[0042] Step b): Take 100g of the mixture A obtained in step a) and add it to the reaction kettle, insert a copper wire with a diameter of 2mm in the kettle, insert the copper wire into the reaction medium, add 3g of sodium carbonate as a catalyst, turn on the nitrogen protection, an...

Embodiment 3

[0046] During the production process of chemically synthesizing glycerin in a factory, the mass composition of the glycerin distillation residue discharged is 50% sodium chloride, 10% glycerin, 5% polymerized glycerin, and the balance is water.

[0047] Step a): Take 1000g of glycerin distillation residue, centrifuge to remove most of the sodium chloride, take 400g of the separated liquid phase I, add 3000g of absolute ethanol, stir well, filter off the inorganic salts, obtain the liquid phase II, and use Ethanol is distilled off under normal pressure in the distiller until the mixture has a constant weight to obtain a mixture A whose main component is glycerol and polyglycerol;

[0048] Step b): Take 100g of the mixture A obtained in step a) and add it to the reaction kettle, insert a copper wire with a diameter of 2mm in the kettle, insert the copper wire into the reaction medium, then add 2g of sodium carbonate as a catalyst, turn on the nitrogen protection, and heat React ...

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Abstract

The invention relates to cement grinding aid composition by taking glycerinum distillation residues as a main raw material as well as a preparation method and an application thereof. The preparation method of the cement grinding aid composition by taking the glycerinum distillation residue as the main raw material comprises the following steps: step a): carrying out solid-liquid separation to the glycerinum distillation residues, taking a liquid phase I, and adding an organic solvent to obtain a liquid phase II by carrying out the secondary solid-liquid separation to sodium chloride precipitate, removing the organic solvent to obtain a mixture A of which the main ingredient comprises glycerinum and polyglycerol; step b): adding the mixture A obtained in the steps a) into a reaction kettle, polymerizing the glycerinum in the presence of a metal catalyst and a copper and alkaline catalyst so as to obtain a mixture B, wherein the main ingredients of the mixture B comprise polyglycerol of which the degree of polymerization is 2.5-3.0 and glycerinum of which the degree of polymerization is 2-5%; step c): adding water into the mixture B obtained in the step b), adjusting the pH value of a solution to between 5 and 7, so as to obtain a solution C of which the sum of the mass percent concentrations of the glycerinum and the polyglycerol is 40-75%.

Description

technical field [0001] The invention relates to a cement grinding aid composition, in particular to a cement grinding aid composition using glycerin distillation residue as a main raw material, its preparation method and application. Background technique [0002] In the production process of chemically synthesized glycerin, glycerin distillation residue will be discharged, and its appearance is dark brown or brown-black semi-solid state, which contains 20%-50% of sodium chloride, 5%-20% of glycerin, and 5%-10% of polymerized glycerin %, the balance being water. Some glycerin manufacturers adopt the method of pouring rainwater into the open air, and the soil method of naturally separating inorganic salts is used to deal with it, which seriously pollutes the environment. How to realize the separation of inorganic salts, glycerol and polymerized glycerol with low energy consumption, so as to further realize industrial utilization is of great practical significance. There are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/02C04B103/52
Inventor 张伟
Owner LINYI UNIVERSITY
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