聚马来酸 HPMA简介

聚马来酸 HPMA

Hydrolyzed Polymaleic Anhydride (HPMA)

　

【CAS】 26099-09-02

结构式

聚马来酸 HPMA 产品性能与用途

HPMA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。HPMA适用于碱性环境。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，与锌盐复配缓蚀效果更好。

HPMA还可用于水泥外加剂，盐碱土壤改良剂。

聚马来酸 HPMA 质量指标

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
密度(20℃)g/cm3 ≥ 1.18
pH(1%水溶液) 2.0～3.0

聚马来酸 HPMA 的使用方法

HPMA通常以1～15mg/L与有机膦酸盐复合，常与有机膦酸盐复合，用于循环冷却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%，EDTMPS与HPMA按1:3比例复配后，可用于低压锅炉炉内水处理；HPMA与锌盐复配时，能有效地防止碳钢的腐蚀。

聚马来酸 HPMA 包装与贮存

HPMA为塑料桶包装，每桶25kg或由用户确定。贮存期为十个月。

聚马来酸 HPMA 安全与防护

HPMA为酸性，操作时注意劳动保护，应避免与皮肤、眼睛等接触，接触后用大量清水冲洗。

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 Pale yellow 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/cm3 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.

Safety Protection:

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