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Preparation method of hydroxyalkyl amide type hard water softening agent

A hydroxyalkyl amide type, hard water softener technology, applied in the field of organic chemical synthesis, can solve the problems of limited addition of metalworking fluids, insufficient solubility, etc.

Inactive Publication Date: 2012-08-15
烟台开发区黎明化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Sodium tripolyphosphate and sodium organic phosphate contain phosphorus, which are obviously insufficient due to the limitation of environmental water pollution; organic sodium salts such as EDTA sodium salt are widely used water-based metalworking fluid hard water softeners, but their solubility is insufficient. Its addition in metalworking fluids is limited

Method used

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  • Preparation method of hydroxyalkyl amide type hard water softening agent
  • Preparation method of hydroxyalkyl amide type hard water softening agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] In a three-necked flask equipped with a stirring device, a reflux condenser and a thermometer, add 192 grams of citric acid and 105 grams of dihydroxyethylamine, add 1.5 grams of sodium hydroxide, heat to 120 ° C for 5 hours under reduced pressure, and then further distill out the reaction Generated water, cooling the product in the there-necked bottle to prepare hydroxyalkylamide hard water softener of citric acid.

Embodiment 2

[0017] In a three-neck flask equipped with a stirring device, a reflux condenser and a thermometer, add 225 grams of ethylenediaminetetraacetic acid and 170 grams of trihydroxyethylethylenediamine, add 2.5 grams of sodium hydroxide, heat to 130 ° C and react under reduced pressure for 6 hours , further distill off the water generated by the reaction, and cool the product in the there-necked flask to obtain the ethylenediaminetetraacetic acid hydroxyalkylamide hard water softener.

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PUM

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Abstract

The invention relates to the technical field of organic chemical synthesis, and particularly relates to a preparation method of hydroxyl alkylamine type hard water softening agent for water-based metalworking fluid. In the preparation method, decompression reaction is carried out under a high-temperature condition by utilizing the characteristic that the reaction activity of amino contained in hydroxyl alkylamine and carboxyl of short molecular chain organic polybasic carboxylic acid is greater than that of amino contained in hydroxyalkyl amide and hydroxyl of short molecular chain organic polybasic carboxylic acid so as to timely evaporate water generated by reaction; and reverse reaction is less, so that hydroxyl alkylamine and carboxyl of carboxyl organic polybasic carboxylic acid react to mainly generate amide, and the hydroxyalkyl amide water softening agent, which is integrated with a chelating function and a water-soluble emulsifying function, for the water-based metalworking fluid is synthetized by partial condensation reaction.

Description

technical field [0001] The invention relates to the technical field of organic chemical synthesis, in particular to a preparation method of a hydroxyalkylamide type hard water softener for water-based metal working fluids. Background technique [0002] Water-based metalworking fluids have been rapidly developed due to their excellent cooling, cleaning, rust resistance, economy and safety, and are widely used in metal processing fields such as cutting, grinding, calendering, stamping and tapping. , water-soluble antirust additives have outstanding advantages, but most of them have poor resistance to hard water, which requires adding a certain amount of hard water softener to improve. [0003] Traditional water-based metalworking fluid hard water softeners are mostly alkali metal salt compounds, such as EDTA sodium salt, sodium tripolyphosphate, sodium organic phosphate, etc. Sodium tripolyphosphate and sodium organic phosphate contain phosphorus, which is obviously insuffici...

Claims

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Application Information

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IPC IPC(8): C07C231/02C07C235/74C02F5/12
Inventor 修建东
Owner 烟台开发区黎明化工有限公司
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