Poly-epoxy itaconic acid, preparing method and uses thereof

A technology of polyepoxy itaconic acid and polyepoxy coating, which is used in the preparation of carboxylate, chemical instruments and methods, preparation of organic compounds, etc.

Active Publication Date: 2008-10-29
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • Poly-epoxy itaconic acid, preparing method and uses thereof

Examples

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Embodiment 1

[0049] Take a 500mL four-necked flask equipped with a thermometer, a dropping funnel, a magnetic stirrer, a reflux tube, and a pH meter, first add 0.25mol of itaconic acid and 12mol of deionized water, and slowly add 48% sodium hydroxide solution under stirring to adjust pH = 3, then add 0.00125 mol of sodium tungstate dihydrate, slowly raise the temperature to 60°C after adding, drop 0.30 mol of 30% hydrogen peroxide in 1 hour at this temperature, and keep it at 55-65 during the dropping process ℃, keep warm and react for 4hrs after dripping, then add 0.0125mol calcium hydroxide, and adjust pH=11 with sodium hydroxide, react at 80℃ for 8 hours, then cool and filter to obtain polyepoxy sodium itaconate (calcium) The light yellow viscous liquid, yield 90.3%. The product was purified by cation exchange resin 001*7 (produced by Jiangyin Organic Chemical Factory, the same below), and the average molecular weight of the polymer was analyzed and measured to be 1200 (average degree o...

Embodiment 2

[0051] Take a 500mL four-necked flask equipped with a thermometer, a dropping funnel, a magnetic stirrer, a reflux tube, and a pH meter, first add 0.25mol of itaconic acid and 12mol of deionized water, and slowly add 48% sodium hydroxide solution under stirring to adjust pH = 4, then add 0.00125 mol of sodium tungstate dihydrate, slowly raise the temperature to 60°C after adding, drop 0.30 mol of 30% hydrogen peroxide in 1 hour at this temperature, and keep it at 55-65 during the dropping process ℃, keep warm and react for 4hrs after dripping, then add 0.0125mol calcium hydroxide, and adjust pH=12 with sodium hydroxide, react at 80℃ for 8 hours, then cool and filter to obtain polyepoxy sodium itaconate (calcium) The light yellow viscous liquid, yield 92.2%. The product was purified by cationic exchange resin, and the average molecular weight of the polymer was determined to be 1100 (average degree of polymerization n=8.5).

Embodiment 3

[0053] Take a 500mL four-necked flask equipped with a thermometer, a dropping funnel, a magnetic stirrer, a reflux tube, and a pH meter, first add 0.25mol of itaconic acid and 12mol of deionized water, and slowly add 48% sodium hydroxide solution under stirring to adjust pH = 5, then add 0.00125 mol of sodium tungstate dihydrate, slowly raise the temperature to 60°C after adding, drop 0.30 mol of 30% hydrogen peroxide in 1 hour at this temperature, and keep it at 55-65 during the dropping process ℃, keep warm for 4hrs after dripping, then add 0.0125mol calcium carbonate, and adjust pH=13 with sodium hydroxide, react for 8 hours at 80℃, then cool and filter to obtain polyepoxy sodium itaconate (calcium) Pale yellow viscous liquid, yield 94.5%. The product was purified by cation exchange resin, and the average molecular weight of the polymer was determined to be 1300 (average degree of polymerization n=10).

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Abstract

The invention relates to polyepoxy itaconic acid, and a preparation method and an application thereof. The polyepoxy itaconic acid is prepared by (A) reacting itaconic acid and alkali to obtain itaconate; (B) subjecting to catalytic epoxidation to obtain epoxy itaconate; and (C) treating the obtained epoxy itaconate with calcium hydroxide or other basic calcium salts under a basic condition. The step (A) is optional. The prepared polyepoxy itaconic acid can be used for treatment of industrial recirculating water and in synthetic detergent, cleaning agent and scaling agent; and the polyepoxy itaconic acid has excellent scaling performance to CaCO3 and Ca3(PO4)2 and a certain capacity for stabilizing Zn<2+> in water when it is applied for treating circulated cooling water.

Description

technical field [0001] The present invention relates to polyepoxy itaconic acid, its preparation method and application, especially polyepoxy itaconic acid, its preparation method and its application in water treatment. technical background [0002] Polyepoxysuccinic acid (PESA) is a phosphorus-free, non-nitrogen-structured "green" water treatment agent first developed by Betz Laboratories in the United States in the early 1990s. The idea is to insert oxygen atoms into the polymer molecules so that the calcium carbonate scale resistance performance is much better than that of PBTCA, HEDP, polyacrylic acid and other polymers, and it can be biodegraded. [0003] Polyepoxy itaconic acid and its salts are new scale inhibitors, dispersants, and scale removers with -O-C-C-O- groups inserted in the molecule and a structure similar to PESA. It can be used as scale inhibitor and dispersant in industrial circulating water treatment, and as metal ion chelating agent in detergent, clea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C59/305C07C51/347C11D3/20
Inventor 张建枚金栋樊大勇白桦
Owner CHINA PETROLEUM & CHEM CORP
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