HEDP是一種有機磷酸類阻垢緩蝕劑，能與鐵、銅、鋅等多種金屬離子形成穩定的絡合物，能溶解金屬表面的氧化物。
中文,基本資料,產品特性,質量指標,使用範圍與方法,包裝與貯存,安全防護,產品推薦,English,Properties,Specification,Application,Storage,Safety,correlation,
中文
基本資料
中文名稱：羥基乙叉二膦酸 HEDP
英文名稱：1-Hydroxy Ethylidene-1,1-Diphosphonic Acid
【CAS】 2809-21-4
別名：羥基亞乙基二膦酸 Dequest:2010
分子式：C2H8O7P2 相對分子質量：206.02
別名：羥基亞乙基二膦酸 Dequest:2010
分子式：C2H8O7P2 相對分子質量：206.02
產品特性
HEDP在250℃下仍能起到良好的緩蝕阻垢作用，在高pH值下仍很穩定，不易水解，一般光熱條件下不易分解。耐酸鹼性、耐氯氧化性能較其它有機磷酸（鹽）好。HEDP可與水中金屬離子，尤其是鈣離子形成六圓環螯合物，因而HEDP具較好的阻垢效果並具明顯的溶限效應，當和其它水處理劑複合使用時，表現出理想的協同效應。
HEDP固體屬於高純產品，適用於冬季嚴寒地區；特別適用於電子行業的清洗劑和日用化學品添加劑。
HEDP固體屬於高純產品，適用於冬季嚴寒地區；特別適用於電子行業的清洗劑和日用化學品添加劑。
質量指標
符合HG/T 3537-1999
項 目 | 指 標 | |
外 觀 | 無色或淡黃色透明液體 | 白色粉末狀固體 |
活性組分（以HEDP計）% ≥ | 50.0 60.0 | 89.0 |
亞磷酸（以PO3計）% ≤ | 2.0 2.0 | 0.80 |
磷酸（以PO4計）% ≤ | 0.8 0.8 | 0.50 |
氯化物 （以Cl計）% ≤ | 0.01 0.01 | 0.01 |
pH值（1% 水溶液） ≤ | 2.0 2.0 | 2.0 |
密度（20℃）g/cm ≥ | 1.34 1.40 | —— |
鈣螯合值mg/g ≥ | 450 500 | —— |
鐵(以Fe計)含量mg/L ≤ | 10 10 | 5.0 |
活性組份（以HEDP·H2O計） % ≥ | —— | 98.0 |
使用範圍與方法
HEDP廣泛套用於電力、化工、冶金、化肥等工業循環冷卻水系統及中、低壓鍋爐、油田注水及輸油管線的阻垢和緩蝕；HEDP在輕紡工業中，可以作金屬和非金屬的清洗劑，漂染工業的過氧化物穩定劑和固色劑，無氰電鍍工業的絡合劑。HEDP作阻垢劑一般使用濃度1~10mg/L，作緩蝕劑一般使用濃度10~50mg/L；作清洗劑一般使用濃度1000~2000mg/L；通常與聚羧酸型阻垢分散劑復配使用。
包裝與貯存
HEDP液體用塑膠桶包裝，每桶30Kg或250Kg；HEDP固體用內襯聚乙烯袋的塑膠編織袋包裝，每袋淨重25kg，也可根據用戶需要確定。貯於室內陰涼通風處，防潮，貯存期十個月。
安全防護
HEDP為酸性，應避免與眼睛、皮膚接觸，一旦濺到身上，應立即用大量清水沖洗。
產品推薦
有機膦液體系列阻垢緩蝕劑 | |
氨基三甲叉膦酸 ATMP | |
羥基乙叉二膦酸 HEDP | |
乙二胺四甲叉膦酸鈉 EDTMPS | 1429-50-1 |
二乙烯三胺五甲叉膦酸 DTPMPA | 15827-60-8 |
2-膦酸丁烷-1,2,4-三羧酸 PBTCA | 37971-36-1 |
多元醇磷酸酯 PAPE | |
2-羥基膦醯基乙酸 HPAA | 23783-26-8 |
雙1,6-亞己基三胺五甲叉膦酸 BHMTPMPA | 34690-00-1 |
膦醯基羧酸共聚物 POCA | |
English
1-Hydroxy Ethylidene-1,1-Diphosphonic Acid(HEDP)
CAS :2809-21-4
Molecular Formula:C2H8O7P2 Molecular weight: 206.02
Molecular Formula:C2H8O7P2 Molecular weight: 206.02
Properties
HEDP is an organophosphoric acid corrosion inhibitor. It can chelate with Fe, Cu, and Zn etc. metal ions and form stable complex compound. It can dissolve the oxidized materials on these metals'surfaces. Under250C HEDP shows excellent scale and corrosion inhibition ability. HEDP has good chemical stability under high pH value, hard to be hydrolyzed, and hard to be decomposed under ordinary light and heat conditions. Its acid/alkali and chlorine oxidation tolerance are better than that of other organophosphoric acids (salt). HEDP can react with metal ions in water system to form hexa-element chelating complex, with calcium ion in particular. Therefore, HEDP has good antiscale and visible threshold effects. When built together with other water treatment chemicals, it shows good synergistic effects.
The solid of HEDP is high purity product, suitable for using in winter and freezing districts. it is quite suitable for using as cleaning agent in electronic fields and as additives in daily chemicals.
Specification
ITEMS | Index | |
Appearance | Colorless or light yellow transparent liquid | White crystal powder |
Active content (as HEDP) % ≥ | 50.060.0 | 89.0 |
Phosphorous acid (as PO3)%≤ | 2.02.0 | 0.80 |
Phosphoric acid(asPO4 )% ≤ | 0.80.8 | 0.50 |
Chloride (as Cl)% ≤ | 1.01.0 | 0.10 |
pH (1% solution) ≤ | 22 | 2.0 |
Density(20C)g/cm≥ | 1.341.40 | —— |
Fe ion ppm ≤ | 10 10 | 5.0 |
Application
HEDP is widely used in the in circulating cool water system of electric power, chemical industry, metallurgy, fertilizer, etc. and widely used as a scale and corrosion inhibitor of low-pressure boilers, field waterflood, oil pipeline.
In light&textile industry, HEDP is used as detergent for metal and nonmetal. In dyeing industry, HEDP is used as peroxide stabilizer and dye-fixing agent; In non-cyanide electroplating, HEDP is used as chelating agent. The dosage of 1-10mg/L is preferred as scale inhibitor, 10-50mg/L as corrosion inhibitor, and 1000-2000mg/L as detergent. Usually, HEDP is used together with polycarboxylic acid.
In light&textile industry, HEDP is used as detergent for metal and nonmetal. In dyeing industry, HEDP is used as peroxide stabilizer and dye-fixing agent; In non-cyanide electroplating, HEDP is used as chelating agent. The dosage of 1-10mg/L is preferred as scale inhibitor, 10-50mg/L as corrosion inhibitor, and 1000-2000mg/L as detergent. Usually, HEDP is used together with polycarboxylic acid.
Storage
HEDP liquid: Normally In 30kg or 250kg net Plastic Drum;ATMP solid: 25kg inner liner polyethylene (PE) bag, outer plastic woven bag, or confirmed by clients request.Storage for ten months in room shady and dry place.
Safety
HEDP is Acidity, Avoid contact with eye and skin, once contacted, flush with water.
correlation
Organic phosphonate liquid series corrosion inhibition | |
Ethylene Diamine Tetra SodiumI(EDTMPS) | 1429-50-1 |
Diethylene Triamine Penta (DTPMPA) | 15827-60-8 |
2 - Phosphonobutane - 1,2,4 - tricarboxylic acid(PBTCA) | 37971-36-1 |
Polyhydric alcohol phosphate ester(PAPE) | |
2-Hydroxyphosphonocarboxylic Acid(HPAA) | 23783-26-8 |
Bis(Hexamethylene Triamine Penta)( BHMTPMPA) | 34690-00-1 |
Amino Trimethylene Phosphonic Acid(ATMP) | |
1-Hydroxy Ethylidene-1,1-Diphosphonic Acid(HEDP) | 2809-21-4 |
