新型无磷无氮阻垢剂的阻磷酸钙垢及分散Fe(Ⅲ)性能

摘要/Abstract

摘要：

以烯丙基聚乙二醇单醚、氯乙酸、氢氧化钠、马来酸酐等为原料制备了一种新型无磷无氮环保型阻垢剂马来酸酐/烯丙基聚乙二醇羧酸钠（MC_n_，n为聚乙二醇聚合度，n=5、9、13），用红外光谱（FT-IR）、核磁共振（1H-NMR）等对阻垢剂结构进行了表征，采取静态阻垢率和含Fe(Ⅲ）溶液透光率的方法考察了阻垢剂阻磷酸钙和分散Fe(Ⅲ）性能，用扫描电镜（SEM）观察了阻垢后形成的磷酸钙形貌。结果表明，随着MC_n结构中聚乙二醇聚合度n从5增加到13，其阻磷酸钙垢性能和分散Fe(Ⅲ）效果也逐步提高，其中MC₁₃在投加量为6 mg·L^-1时阻磷酸钙垢率达99%，在投加量为8 mg·L^-1时使含Fe(Ⅲ）溶液的透光率为22%。MC_n的高效阻磷酸钙垢和分散Fe(Ⅲ）能力是源于其侧链上含有聚乙二醇单醚结构及存在大量的—COO^-离子且易与循环水系统中存在的不同的无机金属离子发生作用。

关键词: 无磷阻垢剂；磷酸钙；分散FONT-FAMILY: Calibri,sans-serif, mso-bidi-font-size: 11.0pt, mso-bidi-font-family: 宋体, mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA, mso-fareast-font-family: 宋体, mso-hansi-font-family: 宋体">Fe(FONT-FAMILY: 宋体, mso-bidi-font-size: 11.0pt, mso-ascii-font-family: Calibri, mso-bidi-font-family: 宋体, mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA">ⅢFONT-FAMILY: Calibri,sans-serif, mso-bidi-font-size: 11.0pt, mso-bidi-font-family: 宋体, mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA, mso-fareast-font-family: 宋体, mso-hansi-font-family: 宋体">)

Abstract:

A novel phosphorus-free and nitrogen-free anti-scalant for calcium phosphate and Fe(Ⅲ), maleic anhydride/allyl polyethylene glycol carboxylate (MC_n, n is the degree of polymerization of polyethylene glycol,n=5, 9, 13), was synthesized from allyl polyethylene glycol monoether, chloracetic acid, maleic anhydride, and sodium hydroxide.The product was characterized by FT-IR and 1H-NMR.The performance of calcium phosphate inhibition and dispersancy towards Fe(Ⅲ）was evaluated by the static scale-inhibiting method and light transmittance, respectively.SEM analysis showed a disordered calcium phosphate crystal in the presence of MC_n.The studies indicated that both inhibition and dispersancy increased with increasing degree of polymerization of polyethylene glycol in the structure of MC_n from 5 to 13.MC₁₃ had superior ability to inhibit the precipitation of calcium phosphate, approximately 99% inhibition when the dosage was 6 mg·L^-1, and had excellent dispersancy towards Fe(Ⅲ), about 22% light transmittance when the dosage was 8 mg·L^-1.Inhibition mechanism was proposed that the interactions between all kinds of metallic ions in systems and carboxyl groups on side chains and/or oxygen atoms of ethers were the fundamental impetus to restrain the formation of calcium phosphate scale and disperse Fe(Ⅲ）in cooling water systems.

Key words: 无磷阻垢剂；磷酸钙；分散FONT-FAMILY: Calibri,sans-serif, mso-bidi-font-size: 11.0pt, mso-bidi-font-family: 宋体, mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA, mso-fareast-font-family: 宋体, mso-hansi-font-family: 宋体">Fe(FONT-FAMILY: 宋体, mso-bidi-font-size: 11.0pt, mso-ascii-font-family: Calibri, mso-bidi-font-family: 宋体, mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA">ⅢFONT-FAMILY: Calibri,sans-serif, mso-bidi-font-size: 11.0pt, mso-bidi-font-family: 宋体, mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA, mso-fareast-font-family: 宋体, mso-hansi-font-family: 宋体">)

符嫦娥, 周钰明, 薛蒙伟, 谢洪涛, 吴文导, 孙伟. 新型无磷无氮阻垢剂的阻磷酸钙垢及分散Fe(Ⅲ)性能 [J]. 化工学报, 2011, 62(2): 525-531.

FU Chang’e, ZHOU Yuming, XUE Mengwei, XIE Hongtao, WU Wendao, SUN Wei. Novel phosphorus-free and nitrogen-free anti-scalant for calcium phosphate and Fe(Ⅲ)[J]. CIESC Journal, 2011, 62(2): 525-531.

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新型无磷无氮阻垢剂的阻磷酸钙垢及分散Fe(Ⅲ)性能

Novel phosphorus-free and nitrogen-free anti-scalant for calcium phosphate and Fe(Ⅲ)

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