Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Preparation process of aliphatic water reducer
The invention relates to the field of water reducing agents, in particular to a preparation process of an aliphatic water reducer and the aliphatic water reducer. The preparation process comprises the following steps: S1, dissolving sodium sulfite in water, adding acetone, fully mixing, then adding formaldehyde accounting for 18-22% of the total amount, controlling the reaction temperature to be less than 45 DEG C, and carrying out heat preservation reaction for 0.5-1 hour to obtain a first reactant; s2, dropwise adding 38-41% of the total amount of formaldehyde into the first reactant, the dropwise adding time being 1-1.5 h, controlling the reaction temperature to be 45-70 DEG C, and performing heat preservation reaction for 0.5-1 h to obtain a second reactant; and S3, dropwise adding the rest formaldehyde into the second reactant for 1-1.5 hours, controlling the reaction temperature to be 70-97 DEG C, carrying out heat preservation reaction for 2-3 hours after dropwise adding, and cooling to 55-65 DEG C to obtain the aliphatic water reducer. The aliphatic water reducer prepared by the invention has excellent dispersing performance.
本申请涉及减水剂领域，更具体地说，它涉及一种脂肪族减水剂的制备工艺及脂肪族减水剂。制备工艺包括如下步骤：S1：将亚硫酸钠溶解于水中，加入丙酮并充分混合，然后加入甲醛总量的18～22%，反应温度控制在＜45℃，保温反应0.5～1h，得到第一反应物；S2：向第一反应物中滴加甲醛总量的38～41%，滴加时间为1～1.5h，反应温度控制在45～70℃，保温反应0.5～1h，得到第二反应物；S3：向第二反应物中滴加剩余的甲醛，滴加时间为1～1.5h，反应温度控制在70～97℃，滴加完毕后保温反应2～3h，然后降至55～65℃，得到脂肪族减水剂。本申请制备得到的脂肪族减水剂具有优异的分散性能。
Preparation process of aliphatic water reducer
The invention relates to the field of water reducing agents, in particular to a preparation process of an aliphatic water reducer and the aliphatic water reducer. The preparation process comprises the following steps: S1, dissolving sodium sulfite in water, adding acetone, fully mixing, then adding formaldehyde accounting for 18-22% of the total amount, controlling the reaction temperature to be less than 45 DEG C, and carrying out heat preservation reaction for 0.5-1 hour to obtain a first reactant; s2, dropwise adding 38-41% of the total amount of formaldehyde into the first reactant, the dropwise adding time being 1-1.5 h, controlling the reaction temperature to be 45-70 DEG C, and performing heat preservation reaction for 0.5-1 h to obtain a second reactant; and S3, dropwise adding the rest formaldehyde into the second reactant for 1-1.5 hours, controlling the reaction temperature to be 70-97 DEG C, carrying out heat preservation reaction for 2-3 hours after dropwise adding, and cooling to 55-65 DEG C to obtain the aliphatic water reducer. The aliphatic water reducer prepared by the invention has excellent dispersing performance.
本申请涉及减水剂领域，更具体地说，它涉及一种脂肪族减水剂的制备工艺及脂肪族减水剂。制备工艺包括如下步骤：S1：将亚硫酸钠溶解于水中，加入丙酮并充分混合，然后加入甲醛总量的18～22%，反应温度控制在＜45℃，保温反应0.5～1h，得到第一反应物；S2：向第一反应物中滴加甲醛总量的38～41%，滴加时间为1～1.5h，反应温度控制在45～70℃，保温反应0.5～1h，得到第二反应物；S3：向第二反应物中滴加剩余的甲醛，滴加时间为1～1.5h，反应温度控制在70～97℃，滴加完毕后保温反应2～3h，然后降至55～65℃，得到脂肪族减水剂。本申请制备得到的脂肪族减水剂具有优异的分散性能。
Preparation process of aliphatic water reducer
一种脂肪族减水剂的制备工艺
CHENG ZHIYU (Autor:in) / XU LIXIANG (Autor:in) / XU BIHUA (Autor:in) / XU CHAOFENG (Autor:in) / LAI GUANSHOU (Autor:in)
13.07.2021
Patent
Elektronische Ressource
Chinesisch
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