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The invention discloses a naphthalene type efficient water reducing agent and a preparation method thereof, relates to the field of concrete additives and solves the problem that the naphthalene type efficient water reducing agent raw materials are short in source. The method comprises the steps of a sulfonation reaction, a hydrolysis reaction, a condensation reaction and a neutralization reaction, and the mass percentages of naphthalene in sulfonation range from 80% to 85%; a second sulfuric acid is added to a sulfonation reaction product to conduct hydrolysis; 40-45 min is needed for adding paraformaldehyde to a hydrolysis reaction product, the temperature is adjusted to range from 110 DEG C to 120 DEG C, and reactions are finished after the temperature is kept for 1-2 h; the mass ratio of the naphthalene in the raw materials to the sulfuric acid in the sulfonation reaction to the second sulfuric acid to water added in the hydrolysis reaction to the paraformaldehyde to alkali liquor is 2750-2850 to 3050-3150 to 500-550 to 1350-1450 to 550-575 to 4400-4600. By means of the naphthalene type efficient water reducing agent and the preparation method thereof, the naphthalene type efficient water reducing agent raw materials are expanded, and the obtained product is good in performance.
The invention discloses a naphthalene type efficient water reducing agent and a preparation method thereof, relates to the field of concrete additives and solves the problem that the naphthalene type efficient water reducing agent raw materials are short in source. The method comprises the steps of a sulfonation reaction, a hydrolysis reaction, a condensation reaction and a neutralization reaction, and the mass percentages of naphthalene in sulfonation range from 80% to 85%; a second sulfuric acid is added to a sulfonation reaction product to conduct hydrolysis; 40-45 min is needed for adding paraformaldehyde to a hydrolysis reaction product, the temperature is adjusted to range from 110 DEG C to 120 DEG C, and reactions are finished after the temperature is kept for 1-2 h; the mass ratio of the naphthalene in the raw materials to the sulfuric acid in the sulfonation reaction to the second sulfuric acid to water added in the hydrolysis reaction to the paraformaldehyde to alkali liquor is 2750-2850 to 3050-3150 to 500-550 to 1350-1450 to 550-575 to 4400-4600. By means of the naphthalene type efficient water reducing agent and the preparation method thereof, the naphthalene type efficient water reducing agent raw materials are expanded, and the obtained product is good in performance.
Naphthalene type efficient water reducing agent and preparation method thereof
2016-02-03
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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