Applications of ethyl polyphosphate_Industrial additives

Overview^[1]

Ethyl polyphosphate is an ester compound and is mainly used as a dehydrating agent in organic synthesis. In recent years, phosphoric acid or polyethyl phosphate has been used as a phosphorylation reagent to synthesize phosphate esters, and this research has attracted people’s attention. Compared with the classic process of using phosphorus oxyhalide, phosphorus trichloride or phosphorus pentoxide as the phosphorylation reagent, this method has high raw material stability, low toxicity, uncomplicated process, and the products are ester and water, without waste gas and Industrial waste discharge has broad prospects.

Apply^[3]

Preparation of drawing lubricant

Each 1kg of drawing lubricating oil is prepared, consisting of the following components: 60g polyphosphoric acid, 10g ethyl polyphosphate, 10g alkyl acid phosphate, 2g sodium polyphosphate, 0.4g calcium phosphate, 11g Water, 0.1g tartaric acid, 0.1g methacrylic acid, 0.1g sodium molybdate, 4g sodium petroleum sulfonate, 4g sulfurized animal oil, 10g synthetic ester, 10 antioxidants, 1010g refined lard and the balance is hydrogenated naphthenic oil .

The water content of the drawing lubricating oil of the present invention is 1.1% (mass percentage), and the acid value is 100 mgKOH/g.

The acid value adjuster for drawing lubricating oil used in conjunction with the drawing lubricating oil of the present invention. Each 1kg acid value adjuster for drawing lubricating oil is composed of the following mass components: 100g polyphosphoric acid, 15g poly Ethyl phosphate, 15g alkyl acid phosphate, 5g sodium polyphosphate, 0.4g calcium phosphate, 12g water, 0.1g tartaric acid, 0.1g methacrylic acid, 0.1g sodium molybdate, 5g sodium petroleum sulfonate and the balance is Hydrogenated naphthenic oil.

The water content of the acid value adjuster for drawing lubricating oil is 1.2% (mass percentage), and the acid value is 200 mgKOH/g.

Before use, the water content and acid value of the drawing lubricating oil need to be tested. When the water content is lower than 1.0%, add water to the oil; when the acid value of the oil is lower than 90mgKOH/g, use the present invention Adjust the drawing lubricating oil acid value adjuster used in conjunction with the drawing lubricating oil until the acid value of the drawing lubricating oil reaches the preset value (100~110mgKOH/g).

A 6-ton steel pipe was used for a drawing test. The wall thickness of the steel pipe was 1.6 to 2.0 mm, and the drawing temperature was between 55 and 60°C. The 6-ton steel pipe was immersed in the drawing lubricating oil of Example 1 for 15 minutes; The wall thickness of each steel pipe after drawing was 1.2mm. Three steel pipes (about 30kg) were broken on site. The product qualification rate reached 99.5%, and no waste water was discharged during the drawing process. .

Preparation^[2]

According to the measurement requirements, add 85% phosphoric acid and phosphorus pentoxide quantitatively into the Erlenmeyer flask. Insert a thermometer and a condensation glass tube about 40cm long into the stopper of the Erlenmeyer flask. Raise the temperature in a magnetic heating stirrer to dissolve phosphorus pentoxide. After the solution is transparent, use an appropriate amount of hydrogen peroxide to decolorize the solution. Continue to raise the temperature to about 210°C, keep it warm for a certain period of time, and then cool. The concentration of phosphoric acid is measured by the quinoline phosphomolybdate volumetric method, and is uniformly expressed as the percentage of phosphorus pentoxide.

Use polyphosphoric acid and cetyl alcohol with a phosphorus pentoxide content of 79.98% as raw materials. When the molar ratio of alcohol to acid is 0.90, react at 75°C for 6 hours to produce white carbon black in the product polyethyl phosphate. The monoester yield was 93.4%, the total ester yield was 94.5%, and the monoester and double ester ratio was 99%. The characteristics of this method are high stability of raw materials, convenient and precise measurement of batching ratio, easy process control, and no waste gas or waste liquid emissions. This method has broad industrial application prospects.