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A method for improving monoester content in nonylphenol polyoxyethylene ether phosphate

A technology of nonylphenol polyoxyethylene ether phosphate and nonylphenol polyoxyethylene ether, which is applied in the direction of phosphorus organic compounds, can solve the problems of product purity and application impact, and achieve short reaction time and increase the proportion , suitable for large-scale industrial production

Active Publication Date: 2017-09-29
TAIXING LINGFEI CHEM TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the traditional method of industrial production of nonylphenol polyether phosphate is to obtain nonylphenol polyether, phosphorus pentoxide and distilled water through esterification and hydrolysis. Ether phosphoric acid diester, the diester content in products produced by traditional technology is too high, the product purity is impure, and the monoester content is up to 70%-80%, which has a certain impact on the application of nonylphenol polyether phosphate products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] In a 2000-liter enamel stirred tank, add 1700mol nonylphenol polyoxyethylene ether (about 1.12t) and 850mol distilled water (about 15.3kg), start stirring at a stirring rate of 250rpm, and then increase the temperature at a rate of 1°C / min to 40°C, and then add the same amount of phosphorus pentoxide in 6 batches, with an interval of 20min between each batch, add 850mol (about 120.6kg) of phosphorus pentoxide in total, after feeding, heat up to 65°C at a rate of 1°C / min. Heat preservation reaction at a stirring rate of 250rpm for 5h; after the reaction, add 1700mol distilled water (about 30.6kg), raise the temperature to 90°C at a rate of 1°C / min, and perform a hydrolysis reaction at a stirring rate of 250rpm for 3h. After the reaction, the obtained The product is nonylphenol polyoxyethylene ether phosphate, and the whole reaction process is about 10h. With potentiometric titration (in this embodiment, according to "Potentiometric Titration Determination of Nonylphenol P...

Embodiment 2

[0017] In a 2,000-liter enamel stirred tank, add 1,700 mol tons of nonylphenol polyoxyethylene ether (about 1.12t) and 850 mol of distilled water (about 15.3kg), and start stirring at a rate of 250rpm at a rate of 2°C / min Raise the temperature to 45°C, then add the same amount of phosphorus pentoxide in 6 batches, with an interval of 20 minutes between each batch, and add a total of 850mol (about 120.6kg). Stir and insulate for 5 hours; then add 1700mol distilled water (about 30.6kg) to the reactant, heat up to 85°C at a rate of 0.75°C / min, and hydrolyze for 3 hours at a speed of 250rpm. After the reaction, the resulting product is nonyl The whole reaction takes 10 hours, and the content of monoester in the product can reach 91% by potentiometric titration.

Embodiment 3

[0019] In a 2000-liter enamel stirred tank, add 1700mol nonylphenol polyoxyethylene ether (about 1.12t) and 850mol distilled water (about 15.3kg), start stirring at 250 rpm, at a rate of 1.5°C / min Raise the temperature to 50°C, then add the same amount of phosphorus pentoxide in 6 batches, with an interval of 20 minutes between each batch, and add a total of 850mol (about 120.6kg). Under heat preservation reaction for 5 hours; then add 1700mol distilled water (about 30.6kg) to the reactant, raise the temperature to 95°C at a rate of 1°C / min, and perform a hydrolysis reaction for 3 hours at a speed of 250rpm. After the reaction, the resulting product is nonyl Based on phenol polyoxyethylene ether phosphate, the content of monoester in the product can reach 90% by potentiometric titration.

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Abstract

The invention discloses a method for increasing the content of monoester in nonylphenol polyoxyethylene ether phosphate. The specific steps are as follows: (a) adding nonylphenol polyoxyethylene ether and distilled water into a reaction kettle, stirring and raising the temperature to 40- 50°C, add phosphorus pentoxide in batches, then raise the temperature to 65‑75°C, and keep it warm for 5 hours; (b) Add distilled water to the reactant in step a, raise the temperature to 85‑95°C, and hydrolyze for 3 hours, and the obtained product is The nonylphenol polyoxyethylene ether phosphate; the inventive method can reduce the content of the by-product diester in the nonylphenol polyether phosphate in the production process, improve the ratio of monoester in the product, and finally nonylphenol polyether The monoester content in the phosphoric acid ester product is at least 90%, and the reaction process of the invention is mild, pollution-free and environmentally friendly.

Description

technical field [0001] The invention belongs to the field of chemical industry, in particular to a method for increasing the content of monoester in nonylphenol polyoxyethylene ether phosphate. Background technique [0002] Nonylphenol polyoxyethylene ether phosphate is an anionic surfactant commonly used in the chemical industry. It is a colorless or light yellow transparent liquid at room temperature, soluble in most organic solvents, and hydrolyzed in water. Nonylphenol polyether phosphate has good detergency, wettability, emulsification and foaming properties, can reduce surface tension, rust removal and lubrication, antistatic, low toxicity and irritation, and has high Stability and heat stability and good compounding, widely used in textile, cosmetics, plastics, detergents, leather, machinery and other industries. [0003] At present, the traditional method of industrial production of nonylphenol polyether phosphate is to obtain nonylphenol polyether, phosphorus pento...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G65/00C07F9/09
Inventor 钱飞张仁吴海成
Owner TAIXING LINGFEI CHEM TECH CO LTD