A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
The invention relates to a preparation method of starch sulfate and application of the starch sulfate as a cement additive. The invention relates to the technical field of fine chemical engineering and concrete admixtures. For the first time, the starch sulfate is prepared by taking sodium hydrogen sulfate or sulfuric acid or a composition aqueous solution of sodium hydrogen sulfate and sulfuric acid as a sulfonating agent by a semi-dry method, and synthesis raw materials comprise starch, the sulfonating agent and an inorganic alkali. The synthesis process comprises the following steps: preparing the sulfonating agent; mixing the sulfonating agent with the starch; heating and esterifying the mixture; and performing esterification product base neutralization. The method disclosed by the invention is different from a method for preparing the starch sulfate by taking concentrated sulfuric acid, chlorosulfonic acid, sulfur trioxide and the like as sulfonating agents in the prior art; the method has the advantages of simple preparation process, no emission of three wastes, low raw material cost, low equipment requirements and the like. The product prepared by the invention can be directly used as a super-retarding superplasticizer or retarder, and has the advantages of high water reducing rate, good retarding effect, strong cohesiveness, bleeding resistance, segregation resistance and the like; and if the starch sulfate is compounded with polycarboxylate superplasticizers and the like, an obvious synergistic effect can be generated.
本发明是一种淀粉硫酸酯的制备方法及其用作水泥外加剂的用途，涉及精细化工及混凝土外加剂技术领域，首创以硫酸氢钠或硫酸、或硫酸氢钠与硫酸的组合物水溶液为磺化剂半干法制备淀粉硫酸酯，其合成原料包括淀粉、磺化剂和无机碱。合成工艺包括：磺化剂的配制；磺化剂与淀粉混合；混合料加热酯化；酯化产物碱中和。本发明方法不同于现有技术以浓硫酸、氯磺酸及三氧化硫等为磺化剂制备淀粉硫酸酯的方法；具有制备工艺简单，无三废排放，以及原料成本和设备要求低等优点。本发明制得的产品可直接用作超缓凝高效减水剂或缓凝剂，具有减水率高，缓凝效果好，粘聚性及抗泌水、抗离析性强等优点；若与聚羧系等减水剂复配使用可产生明显的协同增效效果。
The invention relates to a preparation method of starch sulfate and application of the starch sulfate as a cement additive. The invention relates to the technical field of fine chemical engineering and concrete admixtures. For the first time, the starch sulfate is prepared by taking sodium hydrogen sulfate or sulfuric acid or a composition aqueous solution of sodium hydrogen sulfate and sulfuric acid as a sulfonating agent by a semi-dry method, and synthesis raw materials comprise starch, the sulfonating agent and an inorganic alkali. The synthesis process comprises the following steps: preparing the sulfonating agent; mixing the sulfonating agent with the starch; heating and esterifying the mixture; and performing esterification product base neutralization. The method disclosed by the invention is different from a method for preparing the starch sulfate by taking concentrated sulfuric acid, chlorosulfonic acid, sulfur trioxide and the like as sulfonating agents in the prior art; the method has the advantages of simple preparation process, no emission of three wastes, low raw material cost, low equipment requirements and the like. The product prepared by the invention can be directly used as a super-retarding superplasticizer or retarder, and has the advantages of high water reducing rate, good retarding effect, strong cohesiveness, bleeding resistance, segregation resistance and the like; and if the starch sulfate is compounded with polycarboxylate superplasticizers and the like, an obvious synergistic effect can be generated.
本发明是一种淀粉硫酸酯的制备方法及其用作水泥外加剂的用途，涉及精细化工及混凝土外加剂技术领域，首创以硫酸氢钠或硫酸、或硫酸氢钠与硫酸的组合物水溶液为磺化剂半干法制备淀粉硫酸酯，其合成原料包括淀粉、磺化剂和无机碱。合成工艺包括：磺化剂的配制；磺化剂与淀粉混合；混合料加热酯化；酯化产物碱中和。本发明方法不同于现有技术以浓硫酸、氯磺酸及三氧化硫等为磺化剂制备淀粉硫酸酯的方法；具有制备工艺简单，无三废排放，以及原料成本和设备要求低等优点。本发明制得的产品可直接用作超缓凝高效减水剂或缓凝剂，具有减水率高，缓凝效果好，粘聚性及抗泌水、抗离析性强等优点；若与聚羧系等减水剂复配使用可产生明显的协同增效效果。
Preparation method of starch sulfate and application of starch sulfate as cement additive
一种淀粉硫酸酯的制备方法及其用作水泥外加剂的用途
YIN GE (author)
2020-04-28
Patent
Electronic Resource
Chinese
Facile synthesis of potato starch sulfate magnesium salts
| Tema Archive | 2005
Basic magnesium sulfate cement and preparation method thereof
| European Patent Office | 2024
Sulfate-resistant portland cement and preparation method thereof
| European Patent Office | 2015
Super sulfate cement mortar and preparation method thereof
| European Patent Office | 2024
Basic magnesium sulfate cement and preparation method thereof
| European Patent Office | 2021