Hydrolyzed Polymaleic Anhydride (HPMA)

【CAS】 26099-09-2 Dequest P9000

Properties:

HPMA is a low molecular weight polymeride, 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 (350℃) and high pH(8.3)level, 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. HPMA can also used as additives for cement.

Specification:

items　index

Appearance　Clear to umber transparent liquid

Solid content % 　48.0 min

Bromine value mg/g　80.0 max

Average molecular weight　450 min

pH（1％ solution）　2.0-3.0

Density （20℃）g/cm　1.18 min

Usage:

HPMA is usually used together with organic phosphonate at dosage of 1-15ppm for circulating cool water system, oilfield fill water, crude oil dewatering and low-pressure boilers. HPMA has good scale inhibition (98%) and scale stripping properties. When used together with zinc salts, it can effectively inhibit carbon steel corrosion.

Package and Storage:

Normally In 250kg net Plastic Drum, IBC drum can also be used as required.Storage for one year in room shady and dry place.

Package and Storage:

Acidity, Avoid contact with eye and skin, once contacted, flush with water.

-----------------------------------------------------------------------------------------------------------

HPMA 水解聚马来酸酐

Hydrolyzed Polymaleic Anhydride (HPMA)

别名：聚马来酸　　　　　 CAS No. 26099-09-02

一、产品性能

HPMA是一种低分子量聚电解质，一般相对分子量为400～800，无毒，易溶于水，化学稳定性及热稳定性高，分解温度在330℃以上。在高温（<350℃）和高pH下有明显的溶限效应。HPMA适用于碱性水质或同其它药物复配使用。HPMA在300℃以下对碳酸盐仍有良好的阻垢分散效果，阻垢时间可达100h。由于HPMA阻垢性能和耐高温性能优异，因此在海水淡化的闪蒸装置中和低压锅炉、蒸汽机车、原油脱水、输水输油管线及工业循环冷却水中得到广泛使用。另外HPMA有一定的缓蚀作用，与锌盐复配效果更好。

二、质量指标 符合GB /T 10535-1997

项　 目　指　 标

外 观　浅黄色至棕红色透明液体

固体含量 ％　　　　　　　　 ≥ 　48.0

溴值 mg/g　　　　　　　　　　 ≤　80.0

平均分子量　　　　　　　　　 ≥　450

pH（1％水溶液）　2.0-3.0

密度（20℃）g/cm3 ≥　1.18

三、使用方法

HPMA通常以1~15ppm与有机膦酸盐复合，用于循环冷却水、油田注水、原油脱水处理及低压锅炉的炉内处理，具有良好的抑制水垢生成和剥离老垢的作用，阻垢率可达98%。它与锌盐复配时，能有效地防止碳钢的腐蚀。

四、安全与防护：

HPMA为酸性，应避免与皮肤、眼睛等接触，接触后应用大量水冲洗。

五、包装与储存：

HPMA塑料桶包装，每桶25kg或由用户确定。贮存期为十个月。