37971-36-1 Usage
Description
2-Phosphonobutane-1,2,4-tricarboxylic acid(PBTC) is the latest generation of internationally popular phosphine carboxylic acid, and it is one of the most widely used and best-performing products in the compounding of high-efficiency scale and corrosion inhibitors. It is especially suitable for water quality conditions of high temperature, high hardness, high alkalinity, high pH, and high concentration ratio, and has good scale inhibition performance for calcium carbonate scale and calcium phosphate scale.
Uses
PBTC is the most widely used in the compounding of high-efficiency scale and corrosion inhibitors, is one of the products with the best performance, and is also an excellent stabilizer for zinc salts. It is widely used in the corrosion and scale inhibition of circulating cooling water system and oilfield water injection system, especially suitable for compounding with zinc salt and copolymer. It can be used as a chelating agent and metal cleaning agent in the washing industry.
Chemical Properties
2-Phosphonobutane-1,2,4-tricarboxylic acid (PBTC)is colorless or light yellow transparent liquid. Relative density (20°C) 1.275. Freezing point -15°C. Has excellent scale and corrosion inhibition properties. Acid resistance, alkali resistance, oxidant resistance. When pH>14, it still does not hydrolyze, and the thermal stability is good.
Check Digit Verification of cas no
The CAS Registry Mumber 37971-36-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,7,9,7 and 1 respectively; the second part has 2 digits, 3 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 37971-36:
(7*3)+(6*7)+(5*9)+(4*7)+(3*1)+(2*3)+(1*6)=151
151 % 10 = 1
So 37971-36-1 is a valid CAS Registry Number.
InChI:InChI=1/C7H11O9P/c1-2-3(17(14,15)16)7(4(8)9,5(10)11)6(12)13/h3H,2H2,1H3,(H,8,9)(H,10,11)(H,12,13)(H2,14,15,16)
37971-36-1Relevant articles and documents
Preparation method of low-phosphorous corrosion and scale inhibitor PBTCA (2-phosphonobutane-1,2,4-tricarboxylic acid)
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Paragraph 0006; 0007; 0021; 0022, (2016/11/14)
The invention discloses a preparation method of low-phosphorous corrosion and scale inhibitor PBTCA (2-phosphonobutane-1,2,4-tricarboxylic acid). Certain amounts of diethyl phosphite and diethyl maleate are added to a reaction kettle, a condensation reflux device and a stirrer are started, a certain amount of a catalyst A is slowly dropwise added under the stirring condition that the revolving speed of the stirrer is 200 r/min, and the mixture reacts for 1 h after the temperature is increased to 100 DEG C; then the temperature is decreased to 50 DEG C, a certain amount of ethyl acrylate is added, and the mixture reacts for 8 h in the stirred state; then a certain amount of a catalyst B is added to the reaction kettle, the mixture is heated to 80 DEG C for hydrolysis for 0.5 h, and a finally obtained product, namely, PBTCA, is a yellowish-brown viscous liquid. The preparation method of PBTCA has the advantages of simple process route, convenience in operation, low three-waste emission and the like, and can be widely applied to corrosion and scale inhibition of industrial recirculating cooling water systems.
