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Method for synthesizing water reducing agent by utilizing sulfur trioxide waste gas
The invention discloses a method for synthesizing a water reducing agent by using sulfur trioxide waste gas. The method comprises the following steps: step 1, sulfonation: weighing a naphthalene compound, adding into a four-neck flask, slowly dropwise adding concentrated sulfuric acid, controlling the temperature of the liquid during dropwise adding, slowly introducing sulfur trioxide waste gas, and carrying out a heat preservation reaction; step 2, hydrolysis: adding a certain amount of water, and carrying out a hydrolysis reaction under stirring; and step 3, polymerization: respectively dropwise adding a formaldehyde aqueous solution, methyl ricinoleate ethoxylate and a small amount of an acrylic acid/methacrylic acid mixed aqueous solution, carrying out a polymerization reaction, diluting, and carrying out spray drying. According to the invention, resource reutilization of sulfur trioxide waste gas is realized; the formaldehyde aqueous solution and methyl ricinoleate ethoxylate areslowly dropwise added in a double dropwise adding manner, and a small amount of acrylic acid/methacrylic acid aqueous solution participates in the polymerization reaction to modify the naphthalene water reducing agent, so that the molecular structure is changed, various hydrophilic functional groups are increased, and the water reducing effect of the product is well improved.
本发明公开了一种利用三氧化硫废气合成减水剂的方法，包括如下步骤：第一步、磺化：称取萘类化合物加入到四口烧瓶中，然后缓慢滴加浓硫酸，控制滴加时液体的温度，然后再缓慢通入三氧化硫废气，保温反应；第二步、水解：加入一定量的水进行搅拌水解反应；第三步、聚合：分别滴加甲醛水溶液、蓖麻油酸甲酯乙氧基化物与少量丙烯酸/甲基丙烯酸混合水溶液进行聚合反应，最后稀释、喷雾干燥。本发明不仅实现三氧化硫废气的资源化再利用；且通过双滴加的方式缓慢滴加甲醛水溶液和蓖麻油酸甲酯乙氧基化物、少量丙烯酸/甲基丙烯酸水溶液参与聚合反应，对萘系减水剂进行改性，改变了分子结构，增加了多种亲水官能团，较好地改善了产品的减水效果。
Method for synthesizing water reducing agent by utilizing sulfur trioxide waste gas
The invention discloses a method for synthesizing a water reducing agent by using sulfur trioxide waste gas. The method comprises the following steps: step 1, sulfonation: weighing a naphthalene compound, adding into a four-neck flask, slowly dropwise adding concentrated sulfuric acid, controlling the temperature of the liquid during dropwise adding, slowly introducing sulfur trioxide waste gas, and carrying out a heat preservation reaction; step 2, hydrolysis: adding a certain amount of water, and carrying out a hydrolysis reaction under stirring; and step 3, polymerization: respectively dropwise adding a formaldehyde aqueous solution, methyl ricinoleate ethoxylate and a small amount of an acrylic acid/methacrylic acid mixed aqueous solution, carrying out a polymerization reaction, diluting, and carrying out spray drying. According to the invention, resource reutilization of sulfur trioxide waste gas is realized; the formaldehyde aqueous solution and methyl ricinoleate ethoxylate areslowly dropwise added in a double dropwise adding manner, and a small amount of acrylic acid/methacrylic acid aqueous solution participates in the polymerization reaction to modify the naphthalene water reducing agent, so that the molecular structure is changed, various hydrophilic functional groups are increased, and the water reducing effect of the product is well improved.
本发明公开了一种利用三氧化硫废气合成减水剂的方法，包括如下步骤：第一步、磺化：称取萘类化合物加入到四口烧瓶中，然后缓慢滴加浓硫酸，控制滴加时液体的温度，然后再缓慢通入三氧化硫废气，保温反应；第二步、水解：加入一定量的水进行搅拌水解反应；第三步、聚合：分别滴加甲醛水溶液、蓖麻油酸甲酯乙氧基化物与少量丙烯酸/甲基丙烯酸混合水溶液进行聚合反应，最后稀释、喷雾干燥。本发明不仅实现三氧化硫废气的资源化再利用；且通过双滴加的方式缓慢滴加甲醛水溶液和蓖麻油酸甲酯乙氧基化物、少量丙烯酸/甲基丙烯酸水溶液参与聚合反应，对萘系减水剂进行改性，改变了分子结构，增加了多种亲水官能团，较好地改善了产品的减水效果。
Method for synthesizing water reducing agent by utilizing sulfur trioxide waste gas
利用三氧化硫废气合成减水剂的方法
MA LITAO (author) / DONG CUIPING (author) / SONG BAO (author) / LIU ZIHENG (author) / CUI YAN (author) / PENG CHENG (author)
2020-11-20
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
/
B01J
Chemische oder physikalische Verfahren, z.B. Katalyse oder Kolloidchemie
,
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY
/
C08F
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
,
Makromolekulare Verbindungen, erhalten durch Reaktionen, an denen nur ungesättigte Kohlenstoff-Kohlenstoff-Bindungen beteiligt sind
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