A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Production process of water-reducing slump-retaining polycarboxylic acid
The invention discloses a production process of water-reducing slump-retaining polycarboxylic acid. The production process comprises the following steps: S1, providing water and polyether; S2, providing raw materials, wherein the raw materials comprise a mixture of A, B and C, liquid caustic soda and a catalyst; S3, starting a stirring paddle, and controlling the temperature in the reaction kettleto be between 20 DEG C and 30 DEG C in the whole process; S4, sequentially adding part of the mixture A and a certain amount of liquid caustic soda to enable the pH value of the mixed solution to beweakly acidic; S5, adding the catalyst, and dropwise adding the remaining mixture A, all the mixture C and part of the mixture B at the same time; S6, after the mixture A and the mixture C are drippedback, the remaining mixture B is dripped off; and S7, after the mixture B is dropwise added, adding the residual liquid caustic soda to neutralize to a specified pH value. The production process canimprove the conversion rate so that the production cost can be reduced.
一种减水保坍型聚羧酸的生产工艺，其包括如下步骤：S1：提供水与聚醚；S2：提供原料，所述原料包括A、B、C三种混合物，液碱，催化剂；S3：开启搅拌桨，并在整个制程中将所述反应釜内的温度控制在20度至30度之间；S4：依次加入部分所述A混合物与一定量的液碱以使混合溶液的PH值呈弱酸性；S5：加入所述催化剂，同时滴加剩余的A混合物，全部的C混合物，以及部分的B混合物；S6：在A、C混合物滴回完成后，将剩余的B混合物滴完；S7：在B混合物滴加完成后，加入剩余的液碱进行中和至指定的PH值。本生产工艺可以提高转化率，从而可以降低生产成本。
Production process of water-reducing slump-retaining polycarboxylic acid
The invention discloses a production process of water-reducing slump-retaining polycarboxylic acid. The production process comprises the following steps: S1, providing water and polyether; S2, providing raw materials, wherein the raw materials comprise a mixture of A, B and C, liquid caustic soda and a catalyst; S3, starting a stirring paddle, and controlling the temperature in the reaction kettleto be between 20 DEG C and 30 DEG C in the whole process; S4, sequentially adding part of the mixture A and a certain amount of liquid caustic soda to enable the pH value of the mixed solution to beweakly acidic; S5, adding the catalyst, and dropwise adding the remaining mixture A, all the mixture C and part of the mixture B at the same time; S6, after the mixture A and the mixture C are drippedback, the remaining mixture B is dripped off; and S7, after the mixture B is dropwise added, adding the residual liquid caustic soda to neutralize to a specified pH value. The production process canimprove the conversion rate so that the production cost can be reduced.
一种减水保坍型聚羧酸的生产工艺，其包括如下步骤：S1：提供水与聚醚；S2：提供原料，所述原料包括A、B、C三种混合物，液碱，催化剂；S3：开启搅拌桨，并在整个制程中将所述反应釜内的温度控制在20度至30度之间；S4：依次加入部分所述A混合物与一定量的液碱以使混合溶液的PH值呈弱酸性；S5：加入所述催化剂，同时滴加剩余的A混合物，全部的C混合物，以及部分的B混合物；S6：在A、C混合物滴回完成后，将剩余的B混合物滴完；S7：在B混合物滴加完成后，加入剩余的液碱进行中和至指定的PH值。本生产工艺可以提高转化率，从而可以降低生产成本。
Production process of water-reducing slump-retaining polycarboxylic acid
一种减水保坍型聚羧酸的生产工艺
JIN JUNWEI (author) / WANG MAOLIN (author) / FAN YINGANG (author) / ZHOU YAO (author) / XIA HAIYAN (author) / JIN ZHEN (author) / ZHU HAIFENG (author)
2020-11-13
Patent
Electronic Resource
Chinese
PROCESS FOR PRODUCING WATER-REDUCING AND SLUMP-RETAINING TYPE POLYCARBOXYLIC ACID
| European Patent Office | 2022
Slump-retaining polycarboxylic acid water reducing agent and preparation method thereof
| European Patent Office | 2022