Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Carboxylic acid water reducer mother liquor and preparation method thereof
The invention discloses a preparation method of a carboxylic acid water reducer mother liquor, which comprises the following steps: adding 210-320 parts of by-product acrylic acid mixed liquor with the acrylic acid mass content of 7%-12% into a reaction kettle at the temperature of 10-25 DEG C, and stirring; dropwise adding 25-40 parts of waste liquid alkali with the mass concentration of 30%-35% into the reaction kettle until the pH value in the reaction kettle is 4.5-5.5; adding 15-25 parts of sodium gluconate waste liquid with the mass concentration of 35%-45%, 3-4 parts of sodium hypophosphite, 0.03-0.1 part of a defoaming component, 410-440 parts of a polyether monomer and the balance of water into the reaction kettle, and uniformly stirring; adding 1-2 parts of an initiating component into the reaction kettle, and dropwise adding 30-40 parts of a reducing component with the mass concentration of 5%-10% into the reaction kettle; 2 parts of hydrogen peroxide with the mass concentration of 25%-30% is put into the reaction kettle in the process of dropwise adding the reducing component, the stirring speed is increased, and then 100-125 parts of a by-product acrylic acid mixed solution continues to be dropwise added into the reaction kettle; after dropwise adding, preserving heat and curing; compared with the prior art, the preparation temperature is low, and the concentration of the prepared carboxylic acid water reducer mother liquor is high.
本发明公开了一种羧酸减水剂母液的制备方法，包括以下步骤：在10‑25℃温度下，将210‑320份且丙烯酸质量含量为7％‑12％的副产物丙烯酸混合液加入反应釜中搅拌；后将25‑40份且质量浓度为30％‑35％的废液碱滴入反应釜中，直至反应釜中的pH至为4.5‑5.5；再向反应釜中加入15‑25份且质量浓度为35％‑45％的葡萄糖酸钠废液、3‑4份的次亚磷酸钠、0.03‑0.1份的消泡组分、410‑440份的聚醚单体和余量的水搅拌均匀；接着向反应釜中投入1‑2份引发组分并滴入30‑40份且质量浓度为5％‑10％的还原组分；在滴加还原组分过程中向反应釜中投入2份且质量浓度为25％‑30％的双氧水并提高搅拌速度，后再继续向反应釜中滴加100‑125份副产物丙烯酸混合液；滴加结束后保温熟化；本发明与现有技术相比，制备温度低且制备的羧酸减水剂母液浓度较高。
Carboxylic acid water reducer mother liquor and preparation method thereof
The invention discloses a preparation method of a carboxylic acid water reducer mother liquor, which comprises the following steps: adding 210-320 parts of by-product acrylic acid mixed liquor with the acrylic acid mass content of 7%-12% into a reaction kettle at the temperature of 10-25 DEG C, and stirring; dropwise adding 25-40 parts of waste liquid alkali with the mass concentration of 30%-35% into the reaction kettle until the pH value in the reaction kettle is 4.5-5.5; adding 15-25 parts of sodium gluconate waste liquid with the mass concentration of 35%-45%, 3-4 parts of sodium hypophosphite, 0.03-0.1 part of a defoaming component, 410-440 parts of a polyether monomer and the balance of water into the reaction kettle, and uniformly stirring; adding 1-2 parts of an initiating component into the reaction kettle, and dropwise adding 30-40 parts of a reducing component with the mass concentration of 5%-10% into the reaction kettle; 2 parts of hydrogen peroxide with the mass concentration of 25%-30% is put into the reaction kettle in the process of dropwise adding the reducing component, the stirring speed is increased, and then 100-125 parts of a by-product acrylic acid mixed solution continues to be dropwise added into the reaction kettle; after dropwise adding, preserving heat and curing; compared with the prior art, the preparation temperature is low, and the concentration of the prepared carboxylic acid water reducer mother liquor is high.
本发明公开了一种羧酸减水剂母液的制备方法，包括以下步骤：在10‑25℃温度下，将210‑320份且丙烯酸质量含量为7％‑12％的副产物丙烯酸混合液加入反应釜中搅拌；后将25‑40份且质量浓度为30％‑35％的废液碱滴入反应釜中，直至反应釜中的pH至为4.5‑5.5；再向反应釜中加入15‑25份且质量浓度为35％‑45％的葡萄糖酸钠废液、3‑4份的次亚磷酸钠、0.03‑0.1份的消泡组分、410‑440份的聚醚单体和余量的水搅拌均匀；接着向反应釜中投入1‑2份引发组分并滴入30‑40份且质量浓度为5％‑10％的还原组分；在滴加还原组分过程中向反应釜中投入2份且质量浓度为25％‑30％的双氧水并提高搅拌速度，后再继续向反应釜中滴加100‑125份副产物丙烯酸混合液；滴加结束后保温熟化；本发明与现有技术相比，制备温度低且制备的羧酸减水剂母液浓度较高。
Carboxylic acid water reducer mother liquor and preparation method thereof
一种羧酸减水剂母液及其制备方法
PANG JIANJUN (Autor:in) / LI WENKE (Autor:in) / HE JIA (Autor:in) / ZHANG YI (Autor:in) / ZHANG JIN (Autor:in)
13.09.2024
Patent
Elektronische Ressource
Chinesisch
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