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Asparagic acid possessing phosphinic group, its preparation method and uses in water processing

A technology of phosphonic acid-based polyaspartic acid and polyaspartic acid, applied in water/sludge/sewage treatment, chemical instruments and methods, descaling and water softening, etc., can solve polyaspartic acid scaling and poor performance of stable zinc salt, to achieve great economic and social benefits, good synergistic effect, and simple synthetic route

Active Publication Date: 2005-01-26
中国石油化工股份有限公司北京燕山分公司研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] CN1398799A, CN1341676A, CN1146210A, US5116513, US5152902, US5284512 and US5391764 disclose polyaspartic acid and preparation method thereof, and its shortcoming is that the prepared polyaspartic acid hinders CaCO 3 , Ca 3 (PO 4 ) 2 Scale and poor performance of stable zinc salts

Method used

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  • Asparagic acid possessing phosphinic group, its preparation method and uses in water processing
  • Asparagic acid possessing phosphinic group, its preparation method and uses in water processing

Examples

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Effect test

Embodiment 1

[0050] Add polyaspartic acid (produced by Changmao Biochemical Engineering Co., Ltd., content: 40%, molecular weight: 4000-5000) in a four-necked flask equipped with a stirrer, reflux condenser, constant pressure dropping funnel and thermometer 91.6g and 157ml of water, start stirring to fully dissolve polyaspartic acid. At room temperature (20°C), 26.6 g of aqueous formaldehyde solution was added (the active ingredient was 36%). A cold water bath was used to control the reaction temperature below 50°C, and 45.2 g of phosphorus trichloride (the effective ingredient was 97%) was added dropwise. After the dropwise addition of phosphorus trichloride is completed, the temperature is raised to 70±2°C and the temperature is kept for 2 hours, and the product is cooled down. The organic phosphine content of the product is 8.2%.

Embodiment 2

[0052] Add polyaspartic acid (produced by Changmao Biochemical Engineering Co., Ltd., content: 40%, molecular weight: 4000-5000) in a four-necked flask equipped with a stirrer, reflux condenser, constant pressure dropping funnel and thermometer 91.6g and 157ml of water, start stirring to fully dissolve polyaspartic acid. At room temperature (20°C), 26.6 g of aqueous formaldehyde solution was added (the active ingredient was 36%). A cold water bath was used to control the reaction temperature below 50°C, and 45.2 g of phosphorus trichloride (the effective ingredient was 97%) was added dropwise. After the dropwise addition of phosphorus trichloride is completed, the temperature is raised to 105±2°C and the temperature is kept for 2 hours, and the product is cooled down. The organic phosphine content of the product is 7.3%.

Embodiment 3

[0054] Add polyaspartic acid (produced by Changmao Biochemical Engineering Co., Ltd., content: 40%, molecular weight: 4000-5000) in a four-necked flask equipped with a stirrer, reflux condenser, constant pressure dropping funnel and thermometer 91.6g and 157ml of water, start stirring to fully dissolve polyaspartic acid. At room temperature (20°C), 26.6 g of aqueous formaldehyde solution was added (the active ingredient was 36%). A cold water bath was used to control the reaction temperature below 50°C, and 45.2 g of phosphorus trichloride (the effective ingredient was 97%) was added dropwise. After the dropwise addition of phosphorus trichloride is completed, the temperature is increased to 90±2° C. and the temperature is kept for 4 hours, and then cooled to obtain the product. The organic phosphine content of the product is 9.5%.

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Abstract

The invention discloses an asparagic acid possessing phosphinic group, its preparation method and uses in water processing by using asparagic acid phsophorus trichloride, formaldehyde and water as raw material, wherein the asparagic acid has fine CaCO3 and Ca3(PO4)2 scale resistant function.

Description

Technical field [0001] The invention relates to a polyaspartic acid containing phosphonic acid group, its preparation method and its application in water treatment, namely, a water quality stabilizer containing three functional groups of amide bond, carboxyl group and phosphonic acid group in one molecule, and its preparation Method and its application in water treatment. Background technique [0002] In the circulating cooling water system, there are mainly three problems of scaling, corrosion and microbial hazards. The most convenient and effective way to prevent system scaling and corrosion is to add corrosion and scale inhibitors to the circulating cooling water. At present, most of the formulations commonly used in the treatment of circulating cooling water in China are phosphorus-based formulations. The main agent is a corrosion and scale inhibitor containing phosphonic acid groups. They mainly include: Hydroxyethylidene Diphosphonic Acid (HEDP), Amino Trimethylene Phosphon...

Claims

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Application Information

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IPC IPC(8): C02F5/10C08G69/08
Inventor 郦和生王亭王吉龙
Owner 中国石油化工股份有限公司北京燕山分公司研究院
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