Alcohol ester cement grinding aid and method for producing the same
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A technology of cement grinding aid and alcohol ester, applied in the field of cement process admixture and its preparation, can solve the problems such as alcohol ester sulfate which have not been seen yet, and achieves the advantages of saving energy, reducing consumption, reducing sieve allowance and reducing use cost. Effect
Inactive Publication Date: 2009-05-13
山东华科节能科技有限公司 +2
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There is no report of using alcohol sulfate ester as cement grinding aid
Method used
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Embodiment 1
[0027] Embodiment 1, the preparation of alcohol ester type cement grinding aid, a. get propylene oxide 10mol, H 2 SO 4 20mol spare, in which H 2 SO 4 Use sulfuric acid with a concentration not lower than 97-98%,
[0028] b. Put it into the reactor and heat it up to 70°C, pressurize it to 0.3MPa,
[0029] c. Slowly press propylene oxide into the reactor,
[0030] d. Keep the temperature at 70°C and continue the reaction for 2 hours,
[0031] e. Reduce to normal pressure and drop to normal temperature to take out the product.
Embodiment 2
[0032] Embodiment 2, the preparation of alcohol ester type cement grinding aid, a. get propylene oxide 10mol, H 2 SO 4 25mol standby, in which H 2 SO 4 Use sulfuric acid with a concentration not lower than 97-98%,
[0033] b. Put it into the reactor and heat it to 50°C, pressurize it to 0.25MPa,
[0034] c. Slowly press propylene oxide into the reactor,
[0035] d. Keep the temperature at 80°C and continue the reaction for 2.5 hours,
[0036] e. Reduce to normal pressure and drop to normal temperature to take out the product.
Embodiment 3
[0037] Embodiment 3, the preparation of alcohol ester type cement grinding aid, a. get propylene oxide 10mol, H 2 SO 4 15mol spare, in which H 2 SO 4 Use sulfuric acid with a concentration not lower than 97-98%,
[0038] b. Put it into the reactor and heat it up to 50°C, pressurize it to 0.2MPa,
[0039] c. Slowly press propylene oxide into the reactor,
[0040] d. Keep the temperature at 70-80°C and continue the reaction for 2 hours,
[0041] e. Reduce to normal pressure and drop to normal temperature to take out the product.
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Abstract
The invention discloses an alcohol ester cement grinding aid and a preparation method thereof, which belongs to a cement process admixture and a preparation method thereof. The cement grinding aid is a reaction product of epoxy propane with the concentration of 1 mol and H2SO4 with the concentration of between 1.5 and 2.5 mol under appropriate pressure and temperature conditions. The alcohol ester cement grinding aid has steady performance, adapts to use under the state of higher temperature of a grinder, is favorable for improving grinding efficiency, reduces the weight of screen residue of cement after the use compared with the prior grinding aid, improves the specific surface area, obviously improves early and final set strengths, reduces use cost, contributes to energy conservation and consumption reduction, and is suitable to be promoted and used in large and middle cement production enterprises.
Description
technical field [0001] The invention belongs to a cement process admixture and a preparation method thereof. Background technique [0002] In the production of cement industry, in order to improve the grinding efficiency, reduce the power consumption of the mill, reduce the cement sieve residue, and improve the quality of cement, a small amount of substance-grinding aid must be added in the grinding process. The grinding aid is composed of one or more surface-active substances and other chemical additives. During the grinding process, it can reduce the surface energy of the grinding powder, overcome the attraction between the grinding powders, and reduce the grinding resistance. Prevent sticky balls from grinding, improve the fluidity of the milling powder, thereby reducing the power consumption of the mill and improving the grinding efficiency. Currently recognized grinding aids are classified into: 1.N series, with urea as the main body, compounded with triethanolamine, l...
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