Preparation method of modified molasses waste liquid and cement grinding aid

A technology for modifying molasses waste liquid, which is applied in the field of cement grinding aids added to cement, can solve the problems of functional group concentration, inability to fully play the role of grinding aid and hydration aid, and reduce the fineness and specific surface area , strength improvement, and the effect of increasing the setting time

Active Publication Date: 2015-05-13
华润水泥技术研发(广西)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of molasses waste liquid as a raw material for cement grinding aids still has disadvantages, because the molecular structure of functional groups in molasses waste liquid is too large, and the functional groups are too concentrated to fully exert its grinding and hydration-aiding effects. It is necessary to improve

Method used

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  • Preparation method of modified molasses waste liquid and cement grinding aid

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Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1, the preparation method of the modified molasses waste liquid of this embodiment, which comprises the following steps.

[0023] Step A, take an appropriate amount of molasses waste liquid, adjust the pH value of the molasses waste liquid with sodium hydroxide solution, to pH=9 of the molasses waste liquid, filter under normal pressure to obtain molasses alcohol filtrate A.

[0024] In step B, the acetic acid solution is added to the molasses alcohol filtrate A obtained in step A, and the pH=2 of the molasses alcohol filtrate A is adjusted to obtain molasses waste liquid B.

[0025] Step C, put into the autoclave after mixing the molasses waste liquid B obtained in step B with 35% hydrogen peroxide in a volume ratio of 1:0.1, the pressure in the autoclave is 20KPa, and the temperature is 90 ℃ under the condition, so The molasses waste liquid B is fully reacted with 35% industrial hydrogen peroxide to obtain the molasses waste liquid C.

[0026] In step D, t...

Embodiment 2

[0028] Embodiment 2, the preparation method of the modified molasses waste liquid of this embodiment, which comprises the following steps.

[0029] Step A, take an appropriate amount of molasses waste liquid, adjust the pH value of molasses waste liquid with sodium hydroxide solution, to pH=10 of molasses waste liquid, filter under normal pressure to obtain molasses alcohol filtrate A.

[0030] In step B, the acetic acid solution is added to the molasses alcohol filtrate A obtained in step A, and the pH=2 of the molasses alcohol filtrate A is adjusted to obtain molasses waste liquid B.

[0031] In step C, the molasses waste liquid B obtained in step B and 35% hydrogen peroxide are mixed in a volume ratio of 1:0.1 and put into the autoclave. The pressure in the autoclave is 30KPa and the temperature is 100 ℃. The molasses waste liquid B is fully reacted with 35% industrial hydrogen peroxide to obtain the molasses waste liquid C.

[0032] In step D, the pH value of the molasses...

Embodiment 3

[0034] Embodiment 3, the preparation method of the modified molasses waste liquid of this embodiment, which comprises the following steps.

[0035] Step A, take an appropriate amount of molasses waste liquid, adjust the pH value of molasses waste liquid with sodium hydroxide solution, to pH=11 of molasses waste liquid, filter under normal pressure to obtain molasses alcohol filtrate A.

[0036] In step B, the acetic acid solution is added to the molasses alcohol filtrate A obtained in step A, and the pH=3 of the molasses alcohol filtrate A is adjusted to obtain molasses waste liquid B.

[0037] In step C, the molasses waste liquid B obtained in step B and 35% hydrogen peroxide are mixed in a volume ratio of 1:0.2 and put into the autoclave. The pressure in the autoclave is 30KPa and the temperature is 100 ℃. The molasses waste liquid B is fully reacted with 35% industrial hydrogen peroxide to obtain the molasses waste liquid C.

[0038] In step D, the pH value of the molasses...

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Abstract

The invention provides a preparation method of a modified molasses waste liquid. The preparation method comprises the following steps: A, regulating the PH of the molasses waste liquid to the range of 9-11 by use of a sodium hydroxide solution, and filtering under a normal pressure to obtain a molasses filtrate A; B, adding an acetic acid solution to the molasses filtrate A until the PH is within the range of 2-3, thereby obtaining a molasses waste liquid B; C, thoroughly oxidizing the molasses waste liquid B by using 35% hydrogen peroxide, potassium permanganate or ozone, thereby obtaining a molasses waste liquid C; D, regulating the PH of the molasses waste liquid C to the range of 9-11 by use of the sodium hydroxide solution, thereby obtaining the modified molasses waste liquid. The invention also provides a cement grinding aid which is prepared by mixing the following raw materials in parts by weight with water: 2-5 parts of triethanolamine, 18-25 parts of diethanol monoisopropanolamine, 3-5 parts of industrial salt and 20-30 parts of modified molasses waste liquid. The modified molasses waste liquid has the characteristics of low production cost, and good grinding assisting and hydration assisting effects on the cement.

Description

technical field [0001] The invention relates to the technical field of cement admixtures, in particular to a cement grinding aid added to cement. Background technique [0002] Cement grinding aids can increase the hourly output of the cement grinding table, improve the strength of cement mortar, increase the amount of admixtures, and achieve energy conservation and efficiency in the cement industry. There are obvious economic benefits. [0003] At present, most of the grinding aid formulations used in industrial applications at home and abroad are mainly composed of one or more physical products such as alcohol amines, polyols, lignosulfonic acids, alkyl sulfonates, fatty acid salts and other purified chemical products. It can better meet the needs of cement grinding, but in recent years, due to the rising cost of chemical raw materials and transportation, the number of grinding aid companies has continued to increase, and the price of cement grinding aid products has been ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/38C04B24/12C04B103/52
Inventor 刘伟曾荣梁石文腾灼光纪友红钟克辉彭蓉岳琴吴丹
Owner 华润水泥技术研发(广西)有限公司
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