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The invention discloses a preparation method of modified nano calcium carbonate. The preparation method comprises the following steps of: proportionally stirring and mixing quick lime and water, adding EDTA, performing continuous stirring, enabling an obtained mixture to pass through a 150-200-mesh sieve, and performing filtering, and removing slag to obtain lime slurry for later use; mixing tannic acid with deionized water to obtain a solution A, adding polyvinyl alcohol into the solution A under a stirring condition, heating an obtained mixture solution to 85-90 DEG C, keeping the temperature constant for 3-5 hours, and naturally cooling a product to 20-25 DEG C to obtain hydrogel; mixing the lime slurry with the hydrogel to obtain a mixed solution B, adding carbon dioxide into the mixedsolution B for carbonization reaction, heating the mixed solution B to 50-60 DEG C, keeping the temperature constant, adding stearic acid, urea and starch into the mixed solution B, stirring and mixing an obtained solution for 2-5 hours, and performing filtering and drying to obtain the modified nano calcium carbonate. By adopting the method, the crystal form of the nano calcium carbonate productcan be improved and controlled, and the loose and porous nano calcium carbonate product with large specific surface area is obtained.
本发明公开了一种改性纳米碳酸钙的制备方法，其先将生石灰和水按比例搅拌混合，然后加入EDTA后继续搅拌过150～200目筛后过滤除渣，得到石灰浆备用；然后将单宁酸与去离子水混合后得到溶液A，接着在搅拌条件下向溶液A中加入聚乙烯醇后加热至85～90℃，恒温3～5h后自然冷却至20～25℃，得到水凝胶；再将石灰浆和水凝胶混合得到混合液B，接着向混合液B中加入二氧化碳进行碳化反应，然后加热混合液B至50～60℃恒温，再向混合液B中加入硬脂酸、尿素和淀粉搅拌混合2～5h，过滤干燥后得到改性纳米碳酸钙。采用本方法可以改善和控制纳米碳酸钙产品的晶型，获得比表面积大，呈现疏松多孔的纳米碳酸钙产品。
The invention discloses a preparation method of modified nano calcium carbonate. The preparation method comprises the following steps of: proportionally stirring and mixing quick lime and water, adding EDTA, performing continuous stirring, enabling an obtained mixture to pass through a 150-200-mesh sieve, and performing filtering, and removing slag to obtain lime slurry for later use; mixing tannic acid with deionized water to obtain a solution A, adding polyvinyl alcohol into the solution A under a stirring condition, heating an obtained mixture solution to 85-90 DEG C, keeping the temperature constant for 3-5 hours, and naturally cooling a product to 20-25 DEG C to obtain hydrogel; mixing the lime slurry with the hydrogel to obtain a mixed solution B, adding carbon dioxide into the mixedsolution B for carbonization reaction, heating the mixed solution B to 50-60 DEG C, keeping the temperature constant, adding stearic acid, urea and starch into the mixed solution B, stirring and mixing an obtained solution for 2-5 hours, and performing filtering and drying to obtain the modified nano calcium carbonate. By adopting the method, the crystal form of the nano calcium carbonate productcan be improved and controlled, and the loose and porous nano calcium carbonate product with large specific surface area is obtained.
本发明公开了一种改性纳米碳酸钙的制备方法，其先将生石灰和水按比例搅拌混合，然后加入EDTA后继续搅拌过150～200目筛后过滤除渣，得到石灰浆备用；然后将单宁酸与去离子水混合后得到溶液A，接着在搅拌条件下向溶液A中加入聚乙烯醇后加热至85～90℃，恒温3～5h后自然冷却至20～25℃，得到水凝胶；再将石灰浆和水凝胶混合得到混合液B，接着向混合液B中加入二氧化碳进行碳化反应，然后加热混合液B至50～60℃恒温，再向混合液B中加入硬脂酸、尿素和淀粉搅拌混合2～5h，过滤干燥后得到改性纳米碳酸钙。采用本方法可以改善和控制纳米碳酸钙产品的晶型，获得比表面积大，呈现疏松多孔的纳米碳酸钙产品。
Preparation method of modified nano calcium carbonate
一种改性纳米碳酸钙的制备方法
WEI MING (author)
2020-09-01
Patent
Electronic Resource
Chinese
IPC:
C01F
COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
,
Verbindungen der Metalle Beryllium, Magnesium, Aluminium, Calcium, Strontium, Barium, Radium, Thorium oder der Seltenen Erden
/
B82Y
Bestimmter Gebrauch oder bestimmte Anwendung von Nanostrukturen
,
SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES
/
C04B
Kalk
,
LIME
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