水解聚馬來酸酐 （HPMA）
Hydrolyzed Polymaleic Anhydride （HPMA）
CAS No. 26099-09-02
別名：聚馬來酸
分子式：C7H11O9P
分子量：270.13
結構式：
Structural formula:
1、 產品性能Product performance
本品是有機脂肪酸聚合物，為一種低分子量電解質，含有多個羧基官能團，一般相對分子量為400～800、無毒、易溶于水、化學穩定性及熱穩定性高，分解溫度在330。C以上。在高溫和高PH下有明顯的溶限效應。該劑具有與有機瞵酸、有機瞵磺酸、PBTC等更好的混溶性，適用于堿性水質或同其它藥物復配使用。在300。C下對碳酸鹽和磷酸鹽有良好的阻垢分散效果，阻垢時間可達100h。由于其阻垢性能和耐高溫性能優異，因此在海水淡化的閃蒸裝置中和低壓鍋爐、蒸汽機車、原油脫水、輸水輸油管線及工業循環冷卻水中得到廣泛使用。另外本劑有一定的緩蝕作用，與鋅鹽復配效果更好。
HPMA, polymer of organic aliphatic acid, is a low molecular-weight electrolyte, containing several carboxyl groups, with average molecular weight 400-800. No toxicity, soluble in water, high chemical and thermal stability, decomposed temperature above 330℃. HPMA has obvious threshold effect under high temperature and high pH level. I t has good compatibility with organic phosphoric acid , organic sulfonic acid and PBTC, suitable to be used in alkaline water system or built with agents. It has good scale inhibition against carbonate and phosphate scales under temperature 300℃ with effective time as long as 100 hours. Due to its good scale inhibition and high temperature tolerance properties, HPMA is widely used in desalination plant of flash vaporization equipment, low pressure boiler, steam locomotive, crude oil evaporation, petroleum pipeline, and industrial circulating cool water systems. In addition, HPMA has good corrosion inhibition effect when used together with zinc salt.
2、 用途 Usage
適應于電力、化工、冶金行業循環冷卻水、油田注水、原油污水、低鍋爐阻垢、防垢處理，適應于堿性水質或其它水穩劑復配使用。
Applicable to anti-scale and scale inhibitions in circulating cool water, oilfield feed water, crude oil wastewater, and low pressure boiler in power plant, chemical industry and metallurgy industry. It is adapt to alkaline water or built with other agents.
3、 質量指標 Quality index
外觀：淺黃色至深棕色透明液體
Appearance: light yellow to dark brown transparent fluid
| 指標名稱 Index name | 指標 Index |
| 優等品 Premium | 一等品 First rate | 合格品 Qualified |
| 固體含量% ≥ Solid content ≥ | 48.0 | 48.0 | 48.0 |
| 平均分子量 ≥ molecular weight ≥ | 700 | 450 | 300 |
| 溴值mg/g ≤ bromine value mg/g ≤ | 80.0 | 80.0 | 80.0 |
| PH值（1％水溶液） ≤ Ph value （1% water solution） ≤ | 2.0-3.0 | 2.0-3.0 | 2.0-3.0 |
| 密度：（20℃）g/cm3 ≥ Density: （20℃） g/cm3 ≥ | 1.18 | 1.18 | 1.18 |
4、 使用方法 Usage
單獨使用時（視水質不同），一般投加量為5～10ppm。作為復配作用，一般投加量為2～5ppm。
When used alone （depending on water quality）, the dosage 5~10ppm is preferred. When built with other agents, the dosage 2~5ppm is preferred.
5、 包裝與貯存 Packing and storage
本品采用聚乙烯塑料桶包裝，每桶凈重25kg，或采用內襯聚乙烯塑料薄膜的鐵桶包裝，每桶凈重200kg，運輸時防止曝曬，貯存在干燥通風的庫房內，貯存期10個月。
Pack in 25kg net polyethylene （PE） plastic drum, or in 200kg net iron bucket with polyethylene （PE） inner-lining. Avoid insolation during transportation. Be stored for ten months in room ventilated and dry place.
6、 安全防護 Safety Protection
本品為酸性液體，應避免與眼睛、皮膚接觸，一旦濺到身上，應立即用大量水沖洗。
Acidity. Avoid contact with eye and skin, once contacted, flush with water.
