Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Method for preparing water reducer from oxyanthraquinone byproduct
The invention discloses a method for preparing a water reducer from an oxyanthraquinone byproduct and relates to the technical field of oxyanthraquinone reclamation and concrete water reducer production. The method comprises the following steps: mixing a sodium hydroxide water solution and the oxyanthraquinone byproduct to perform neutralization reaction, and separating to obtain a sodium phthalate water solution; mixing the sodium phthalate water solution with a monomer used as a naphthalene, aliphatic series or sulfamic acid concrete water reducer, adding formaldehyde to perform condensation reaction to obtain the modified naphthalene, aliphatic series or sulfamic acid concrete water reducer. The sodium phthalate can be condensed in the molecule of the product under the effect of the formaldehyde to obtain the modified water reducer; because the sodium phthalate is a monomer of the condensation compound containing a carboxylic acid group, in the disperse system of the water solution, the carboxylic acid group and the dispersed substance can form a hydrogen binding adsorption, and the water reduction and the plastic retaining performance of the water reducer are increased.
Method for preparing water reducer from oxyanthraquinone byproduct
The invention discloses a method for preparing a water reducer from an oxyanthraquinone byproduct and relates to the technical field of oxyanthraquinone reclamation and concrete water reducer production. The method comprises the following steps: mixing a sodium hydroxide water solution and the oxyanthraquinone byproduct to perform neutralization reaction, and separating to obtain a sodium phthalate water solution; mixing the sodium phthalate water solution with a monomer used as a naphthalene, aliphatic series or sulfamic acid concrete water reducer, adding formaldehyde to perform condensation reaction to obtain the modified naphthalene, aliphatic series or sulfamic acid concrete water reducer. The sodium phthalate can be condensed in the molecule of the product under the effect of the formaldehyde to obtain the modified water reducer; because the sodium phthalate is a monomer of the condensation compound containing a carboxylic acid group, in the disperse system of the water solution, the carboxylic acid group and the dispersed substance can form a hydrogen binding adsorption, and the water reduction and the plastic retaining performance of the water reducer are increased.
Method for preparing water reducer from oxyanthraquinone byproduct
XU ZHAOTONG (Autor:in) / XU BIANRONG (Autor:in)
01.07.2015
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
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