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Method for preparing modified poly-epoxy succinic acid derivative

A technology of polyepoxysuccinic acid and derivatives, applied in chemical instruments and methods, descaling and water softening, water/sludge/sewage treatment, etc., to achieve good biodegradability and prevent insoluble polymer-calcium coagulation. glue, the effect of a wide range of applications

Inactive Publication Date: 2008-10-29
SICHUAN KAIWO ENVIRONMENTAL PROTECTION TECHCO
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Problems solved by technology

Foreign countries have made epoxysuccinate methyl or ethyl esterified, ring-opened polymerization in a solvent-free system or an inert solvent system, and then hydrolyzed to obtain polyepoxysuccinic acid. Butenedioic anhydride is dissolved in water, and 2-acrylamide-2-methylpropanesulfonic acid introduces copolymerization to prepare polyepoxysuccinic acid derivatives

Method used

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  • Method for preparing modified poly-epoxy succinic acid derivative

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Embodiment 1

[0016] Add 9.8g of maleic anhydride and water into a 4-neck flask equipped with a thermometer, condenser, dropping funnel and constant speed stirring device, stir to make it completely dissolve in water, add 8.1g of 2-acrylamide-2-formazine Propanesulfonic acid, react at 80°C for 2 hours, after the reaction is completed, control the solution temperature at 50°C-55°C, add an appropriate amount of sodium hydroxide solution dropwise, pay attention to controlling the rate of addition, and finish the dropwise addition within 30 minutes . Heating, when the temperature of the solution reaches 60°C, add the inorganic filtration metal mixed catalyst according to 2.1% of the amount of maleic anhydride, and then continuously add the hydrogen peroxide solution whose total amount is 1.4 times that of maleic anhydride, and dropwise Sodium hydroxide, keep the pH value of the solution between 6 and 6.5, after the dropwise addition, heat to 70°C, react at this temperature for 1.5 hours, and th...

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Abstract

A preparation method of a modified polyepoxysuccinic acid derivative comprises the steps of: dissolving maleic anhydride in water, reacting with 2-acrylamido-2-methylpropanesulfonic acid at 80DEG C for 2 hours, controlling the solution temperature at 50-55DEG C, adding sodium hydroxide, heating, adding an inorganic metal mixed catalyst, continuously adding a hydrogen peroxide solution while dripping sodium hydroxide, heating to 70DEG C, reacting at this temperature for 1.5 hours, adding a polymerization agent calcium hydroxide accounting for 1.5-1.1% of the total weight of the added substances, adding an inorganic alkali metal catalyst with mass fracture of 1.31% of the total weight of the added substances, and allowing polymerization at 90-100DEG C for 2-3 hours to obtain the modified polyepoxysuccinic acid derivative. The obtained modified polyepoxysuccinic acid derivative is a phosphorus-free, nitrogen-free environmentally friendly treatment agent; has both corrosion inhibition and scale inhibition functions; and has good biodegradability and wide application range.

Description

1. Technical field: [0001] The invention relates to a preparation method of a water treatment agent, in particular to a preparation method of a modified polyepoxysuccinic acid derivative. 2. Background technology [0002] Modified polyepoxysuccinic acid derivative is a phosphorus-free and nitrogen-free "green" water treatment agent, which has dual functions of corrosion inhibition and scale inhibition, good biodegradability, and wide application range. It can be used in industrial water treatment and reverse osmosis devices as scale inhibitor, dispersant, corrosion inhibitor, etc. The methods for preparing polyepoxysuccinic acid at home and abroad mainly use maleic anhydride as raw material, hydrolyze in alkaline environment, add hydrogen peroxide and use sodium tungstate as catalyst for cyclization reaction, and then add alkaline calcium salt It is mainly used as an initiator for polymerization reactions. In addition, there have been domestic reports on the preparation of...

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Application Information

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IPC IPC(8): C08F222/06C08F220/56C08F8/00C02F5/10
Inventor 骆秀芳
Owner SICHUAN KAIWO ENVIRONMENTAL PROTECTION TECHCO
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