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A kind of preparation method of hydroxyalkylamide type hard water softener

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

Inactive Publication Date: 2016-08-24
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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  • A kind of preparation method of hydroxyalkylamide type hard water softener
  • A kind of preparation method of hydroxyalkylamide type hard water softener
  • A kind of preparation method of hydroxyalkylamide type hard water softener

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-necked flask equipped with a stirring device, a reflux condenser and a thermometer, add 225 grams of ethylenediamine tetraacetic acid and 170 grams of trihydroxyethylethylenediamine, add 2.5 grams of sodium hydroxide, and heat to 130 ° C for 6 hours under reduced pressure. , 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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Abstract

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 metalworking fluids, which utilizes the reaction of the amino group contained in the hydroxyalkylamine with the carboxyl group of a short molecular chain organic polycarboxylic acid The activity is greater than the characteristics of its hydroxyl group. Under the condition of high temperature, the reaction is reduced under reduced pressure, and the water generated by the reaction is evaporated in time. The reverse reaction is very small, so the reaction between hydroxyalkylamine and the carboxyl group of short molecular chain organic polycarboxylic acid mainly generates amides. Through partial condensation reaction, a hydroxyalkylamide type hard water softener for water-based metalworking fluid with chelating function and water-soluble emulsifying function was synthesized.

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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Patent Type & Authority Patents(China)
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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