PBTC; Dequest 7000; Mayoquest 2100; Bayhibit AM; Belclene 650; Codex 551; Briquest PBTC, PBTC tricarboxylic acid, 2-phosphonobutane-1 2 4-tricarboxylic acid
37971-36-1, from ChemIDplus, EPA Chemicals under the TSCA, EPA DSStox, European Chemicals Agency (ECHA).
40372-66-5, from ChemIDplus, European Chemicals Agency (ECHA).
253-733-5, from European Chemicals Agency (ECHA).
254-894-4, from European Chemicals Agency (ECHA).
Phosphonobutane tricarboxylic acid is excellent as both antiscalants and corrosion inhibitors, because of its structural feature of carboxylic acid and phosphoric acid. The PBTC chemical is stable and high efficiency in the condition of high hardness, temperature, pH value, and indexed matter concentration.
While usually building with other organophosphates, PBTC acid also widely works together with zinc salts whose solubility it will increase. Phosphonobutane tricarboxylic acid can improve zinc salt solubility. PBTC also have the higher tolerance to oxidation agents like chlorine or bromine in the system.
The first reaction for PBTC 50 production is between dialkyl phosphite (usually dimethyl phosphite in China) and maleic acid dimethyl ester under basic catalyst. Tetraalkyl ester of phosphonosuccinic acid forms and immediately reacted with methyl acrylate. The following thereupon saponification yields PBTCA.
|Appearance||Colorless or light yellow transparent liquid|
|Active acid %||49.0 – 51.0|
|Phosphorous acid (as PO33-)%||0.8 max|
|Phosphoric acid (as PO43-)%||0.5 max|
|pH (1% water solution)||1.5 – 2.0|
|Fe ppm||20.0 max|
|Chloride ppm||10.0 max|
|Density (20℃) g/cm3||1.27 min|
As an excellent inhibitor to both scale and corrosion, PBTC 50 is the excellent stabilizer for zinc salt. It is widely applied in the refilling system and circulated cooling system for oil fields, steel mills, and mines. PBTC 50 can be used in situations of high temperature, high hardness, high alkali, and high concentration index. Besides, PBTC is used to chelate metal ions in lavation and detergent industries as metal detergent. In pH 7-10, 5-15 mg/L is recommended if only PBTC.
PBTC 50 is usually used together with the zinc salt, copolymer, organophosphine, imidazole, and other water treatment agents. When used alone, the dosage of 5-15 mg/l is preferred.
Package and Storage
200L plastic drum, IBC (1000L), customers’ requirement.
Storage for one year in a shady room and dry place.
Acidity, Avoid contact with eye and skin, once contacted, flush with water.
Corrosive. IMO class 8, UN 3265.