PBTCA(2-磷酸基-1,2,4-三羧酸丁烷)是上世紀八十年代發(fā)明的新一代膦羧酸,為比較領先的一種低磷緩蝕阻垢劑,現(xiàn)已廣泛應用于工業(yè)生產(chǎn)。工業(yè)生產(chǎn)中以二烷基亞磷酸酯、順丁烯二酸二烷酯,以及丙烯酸烷酯等為原料,在強堿性催化條件下,經(jīng)一步連續(xù)反應合成的。其產(chǎn)率為87.7%;采用IR、31P-NMR、1H-NMR、13C-NMR等方法證實了合成產(chǎn)物的分子結構,并取得了理想的結果。
基本介紹
產(chǎn)品廣泛應用于循環(huán)冷卻水系統(tǒng)和油田注水系統(tǒng)。PBTCA具有良好的阻碳酸鈣、磷酸鈣垢的性能,對鋅離子等有獨特穩(wěn)定的作用,使鋅離子在PH為8.3的循環(huán)冷卻水中穩(wěn)定存在。在PH為9.5時還能穩(wěn)定,使含鋅堿性運行配方成為可能。PBTCA還具有良好的耐高溫、耐氧化、耐氯穩(wěn)定性能,對高濁度、高鐵的循環(huán)水有良好的分散性能。
別名:,2,4-三羧酸-2-膦酸基丁烷;PBTC;2-膦酰基-1,2,4-丁烷三羧酸;膦酰基丁烷三羧酸; CAS No. 37971-36-1 分子式 C7H11O9P 相對分子質量:270.13
結構式
產(chǎn)品性能
PBTCA含磷量低,由于它具有膦酸和羧酸的結構特性,使其具有良好的阻垢和緩蝕性能,優(yōu)于常用的有機膦酸,特別在高溫下阻垢性能遠優(yōu)于常用的有機膦酸,能提高鋅的溶解度,耐氯的氧化性能好,復配協(xié)同性好。
質量指標
項 目 | 指 標 |
外 觀 | 無色或淡黃色透明液體 |
活性組分(以PBTCA計)% ≥ | 50.0 |
亞磷酸(以PO3計)% ≤ | 0.40 |
正磷酸(以PO4計)% ≤ | 0.30 |
密度(20℃)g/cm3 ≥ | 1.28 |
PH值(1%水溶液)≤ | 2.0 |
質量指標 符合HG/T 3777-2005
項 目 | 指 標 |
外 觀 | 無色或淡黃色透明液體 |
活性組分(以PBTCA計)% ≥ | 50.0 |
亞磷酸(以PO33-計)% ≤ | 0.8 |
正磷酸(以PO43-計)% ≤ | 0.5 |
密度(20℃)g/cm3 ≥ | 1.270 |
PH值(1%水溶液) | 1.5 - 2.0 |
用途
PBTCA在高效阻垢緩蝕劑復配中應用最廣,是性能最好的產(chǎn)品之一,也是鋅鹽的優(yōu)良穩(wěn)定劑。廣泛應用于循環(huán)冷卻水系統(tǒng)和油田注水系統(tǒng)的緩蝕阻垢,特別適合與鋅鹽、共聚物復配使用,可用于高溫、高硬、高堿及需要高濃縮倍數(shù)下運行的場合,PBTCA在洗滌行業(yè)中可作螯合劑及金屬清洗劑。應用范圍與使用方法
PBTCA一般與鋅鹽、共聚物、有機磷、唑類等其它水處理劑復配使用。如單獨使用投加劑量為5~15mg/L。
安全防護
PBTCA為酸性,應避免與眼睛、皮膚接觸,一旦濺到身上,應立即用大量水沖洗。
英文介紹
2-Phosphonobutane -1,2,4-Tricarboxylic Acid(PBTCA)
CAS No. 37971-36-1 Dequest 7000
Molecular Formula:C7H11O9PMolecular weight: 270.13
Structural Formula:
Properties:
PBTCA has low content of phosphoric, has structural features of both phosphoric acid and carboxylic acid group, which enable its excellent scale and corrosion inhibition properties. Its antiscale property under high temperature is far better than that of organophosphines. It can improve zinc salt solubility, has good chlorine oxidation tolerance and good composite synergy.
Specification:
items | index |
Active acid % | 50.0 min |
Phosphorous acid% | 0.8 max |
Phosphorous acid% | 0.5 max |
Density (20℃) | 1.27 ming/cm |
pH(1% solution) | 1.5~2.0 |
Usage:
PBTCA is a high efficient agent as scale and corrosion inhibitor. It is the excellent stabilizer for zinc salt. It is widely used in circulating cool water system and oilfield refill water system as scale and corrosion inhibitor, suitable to composite with zinc salt and copolymer. It can be used in situations of high temperature, high hardness, high alkali and high concentration index. In lavation fields, it is used as chelating agent and metal detergent.
PBTCA is usually used together with zinc salt, copolymer, organophosphine, imidazole and other Water Treatment Chemicals. When used alone, the dosage of 5-15mg/L is preferred.
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.
Keywords:PBTCA China,2-Phosphonobutane -1,2,4-Tricarboxylic Acid(PBTCA)