I. A. Pochitalkina, Yu. A. Bessolova, A. V. Artamonov, D. F. Kondakov
{"title":"Ca(OH)2-H3PO4-H2O 系统中的化学沉积分析","authors":"I. A. Pochitalkina, Yu. A. Bessolova, A. V. Artamonov, D. F. Kondakov","doi":"10.1134/S0040579523050275","DOIUrl":null,"url":null,"abstract":"<p>The possibility of regulating the structure and morphology of precipitates forming in the CaO–P<sub>2</sub>O<sub>5</sub>–H<sub>2</sub>O system in the low concentration region during neutralization of acidic solutions with lime milk is studied. The effect of the main technological parameters (temperature and pH) on the crystallization of calcium phosphates from dilute CaO–P<sub>2</sub>O<sub>5</sub>–H<sub>2</sub>O solutions, other conditions being equal, is determined. The formation of dicalcium phosphate under neutralization of the model acidic solutions in the range of pH 4.5–6.5 is reported; at higher pH values, the formation of tricalcium phosphate crystalline hydrate is observed. The formation of hydroxyapatite crystals is not established. It is demonstrated by the physicochemical analysis of the forming precipitates that an increase in the neutralization temperature facilitates an increase in the tricalcium phosphate crystallization rate at lower pH values.</p>","PeriodicalId":798,"journal":{"name":"Theoretical Foundations of Chemical Engineering","volume":"57 5","pages":"1053 - 1057"},"PeriodicalIF":0.7000,"publicationDate":"2024-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Analysis of Chemical Deposition in the Ca(OH)2–H3PO4–H2O System\",\"authors\":\"I. A. Pochitalkina, Yu. A. Bessolova, A. V. Artamonov, D. F. Kondakov\",\"doi\":\"10.1134/S0040579523050275\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>The possibility of regulating the structure and morphology of precipitates forming in the CaO–P<sub>2</sub>O<sub>5</sub>–H<sub>2</sub>O system in the low concentration region during neutralization of acidic solutions with lime milk is studied. The effect of the main technological parameters (temperature and pH) on the crystallization of calcium phosphates from dilute CaO–P<sub>2</sub>O<sub>5</sub>–H<sub>2</sub>O solutions, other conditions being equal, is determined. The formation of dicalcium phosphate under neutralization of the model acidic solutions in the range of pH 4.5–6.5 is reported; at higher pH values, the formation of tricalcium phosphate crystalline hydrate is observed. The formation of hydroxyapatite crystals is not established. It is demonstrated by the physicochemical analysis of the forming precipitates that an increase in the neutralization temperature facilitates an increase in the tricalcium phosphate crystallization rate at lower pH values.</p>\",\"PeriodicalId\":798,\"journal\":{\"name\":\"Theoretical Foundations of Chemical Engineering\",\"volume\":\"57 5\",\"pages\":\"1053 - 1057\"},\"PeriodicalIF\":0.7000,\"publicationDate\":\"2024-01-17\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Theoretical Foundations of Chemical Engineering\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://link.springer.com/article/10.1134/S0040579523050275\",\"RegionNum\":4,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"ENGINEERING, CHEMICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Theoretical Foundations of Chemical Engineering","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1134/S0040579523050275","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
Analysis of Chemical Deposition in the Ca(OH)2–H3PO4–H2O System
The possibility of regulating the structure and morphology of precipitates forming in the CaO–P2O5–H2O system in the low concentration region during neutralization of acidic solutions with lime milk is studied. The effect of the main technological parameters (temperature and pH) on the crystallization of calcium phosphates from dilute CaO–P2O5–H2O solutions, other conditions being equal, is determined. The formation of dicalcium phosphate under neutralization of the model acidic solutions in the range of pH 4.5–6.5 is reported; at higher pH values, the formation of tricalcium phosphate crystalline hydrate is observed. The formation of hydroxyapatite crystals is not established. It is demonstrated by the physicochemical analysis of the forming precipitates that an increase in the neutralization temperature facilitates an increase in the tricalcium phosphate crystallization rate at lower pH values.
期刊介绍：
Theoretical Foundations of Chemical Engineering is a comprehensive journal covering all aspects of theoretical and applied research in chemical engineering, including transport phenomena; surface phenomena; processes of mixture separation; theory and methods of chemical reactor design; combined processes and multifunctional reactors; hydromechanic, thermal, diffusion, and chemical processes and apparatus, membrane processes and reactors; biotechnology; dispersed systems; nanotechnologies; process intensification; information modeling and analysis; energy- and resource-saving processes; environmentally clean processes and technologies.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
