Phosphate polyol is a chemical substance with a molecular formula of po4hr1r2.

Basic information

Chinese name

Polyol phosphate ester

Foreign name

Polyglycerol phosphate ester

Molecular formula

PO4HR1R2

exterior

Colorless or yellow transparent liquid

catalogue

1 Polyol phosphate ester

2 Physical and chemical properties

3 Synthesis methods

4 Quality standards

5 Testing methods

6 Purpose

7 Safety, Health, and Protection

8 Packaging, storage, and transportation

Fold and edit this section on polyol phosphates

Nickname: Polyether phosphate ester

Structural formula:

Polyol phosphate ester

Polyol phosphate ester

N1, N2, and N3 can be 0 or 1, respectively.

The physical and chemical properties of this paragraph are as follows:

Polyol phosphates can be divided into two types: type A is polyoxyethylene ether phosphates, which are brown paste like substances; Type B is a nitrogen-containing polyol phosphate ester, which is a mixed ester of polyhydroxy compounds and is a black viscous liquid. The solubility of ordinary organic phosphoric acid in water decreases with the increase of the number of alkyl carbon atoms in R. Both monoesters and diesters of phosphate esters are acidic and can decompose hydrogen ions in aqueous solutions. In alkaline media, this decomposition is accelerated. Although it is slower than polyphosphate, it is easily hydrolyzed at higher temperatures and alkaline conditions. The hydrolysis rate is 10 times that of neutral media. Once hydrolysis occurs, the corrosion and scale inhibition effects will be lost, and the generated phosphate can combine with calcium ions in water to form the least soluble calcium phosphate scale precipitate.

Folding composition method for editing this paragraph

Generally speaking, glycerol is oxidized by phosphate and then esterified with phosphonic acid. The oxidation reaction of glycerol is as follows: glycerol is mixed with powdered caustic soda, heated to 150 ℃ under inert gas protection, and then added to epoxyethane in a molar ratio of 2:1, maintaining a temperature of 150-160 ℃. After adding ethylene oxide and maintaining it for a period of time (such as 1.2 hours), it can be considered that the oxyethylation reaction of glycerol is complete. The amount of caustic soda added in this process accounts for approximately 0.1% of the total amount of glycerol and ethylene oxide. The process of phosphonate esterification of polyoxyethylene ether and glycerol involves adding phosphorus pentoxide to the reactor in a mass ratio of 4.5:1, preheating to 50 ℃, and then gradually adding phosphorus pentoxide to the reactor in a mass ratio of 1:1.1-1.2 for phosphorus pentoxide/polyoxyethylene ether glycerol, with a temperature not exceeding 125-135 ℃. After adding phosphorus pentoxide, the material inside the reactor becomes transparent after being kept warm for a period of time, indicating the completion of the esterification process. Add water to cool the phosphate to the required concentration for later use. The synthesis route is as follows:

Heating R-0h+H3PO4 to form R-h2po4+H20

(R-0) 2po2h+H2O was prepared by heating 2r-oh+H3PO4

R-o-pcl4+3H2O reaction generates R-h2po4+4hcl

Ethylene glycol, ethylene glycol monoethyl ether, polyoxyethylene ether, glycerol, and triethanolamine are stirred and mixed, heated to 75-85 ℃, and then slowly added with phosphorus pentoxide. After adding phosphorus pentoxide, the reaction temperature was controlled at 130-140 ℃ for 1-2 hours, and the resulting phosphoric acid mixture was cooled with water to achieve the expected experimental reserve. The ratio of reactants is triethanolamine, and the optimal reaction mixture is 60:40-40:60 (mass ratio). The optimal mass ratio of ethylene glycol, ethylene glycol monoether, and polyoxyethylene ether glycerol is 1:4:4. Ethylene glycol monoether can be added in two batches, one with ethylene glycol and polyethylene ether glycerol before the reaction, and the other during the 140 ℃ insulation period.

The quality standard for folding and editing this paragraph

Refer to the technical requirements specified in the industry standard hg2228-91

project

index

Solid content% ≥

fifty

Total phosphorus content (calculated as PO4)% ≥

thirty

Organic phosphorus content (calculated as PO4)% ≥

fifteen

PH (1% aqueous solution)

2.0-3.0

The detection method for folding and editing this section

Conduct the test according to the method specified in the HG2228-91 standard.

Class A products contain organic phosphonates (including organic monophosphates and bisphosphonates) and phosphorus pentoxide (forming inorganic phosphate with water), which can be continuously titrated by neutralization method.