Preparation method for highly effective maleic anhydride series polymer antisludging agent

A technology of maleic anhydride and scale inhibitor, which is applied in the field of preparation of high-efficiency maleic anhydride polymer scale inhibitor, can solve the problem of high solubility and achieve the effect of high solubility

Active Publication Date: 2007-09-26
HAISO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because this hyperbranched multi-double bond monomer contains a branched structure, it has higher solubility than linear homologues, and is more suitable as an additive for water treatment agents. From the perspective of application effects, it is indeed very good, and domestic and foreign literature no report

Method used

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  • Preparation method for highly effective maleic anhydride series polymer antisludging agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Synthesis of Hyperbranched Polyester

[0035] Weigh 0.1 mole of 2,2-bis(hydroxymethyl)propionic acid, 4 mg of trimethylolpropane, 0.02 gram of toluenesulfonic acid catalyst, and move into a four-necked flask equipped with a thermometer, a stirrer, and a reflux condenser , melted and polymerized at 140°C for 5 hours, then precipitated and filtered with 500 ml of acetone, and dried at 50°C for 24 hours to obtain a white powdery hyperbranched polyester solid for future use.

Embodiment 2

[0037] Synthesis of Hyperbranched Polyester

[0038] Add 0.15 moles of dibasic acid anhydride to a three-necked flask equipped with a spherical condenser, a constant pressure funnel, and electric stirring, use tetraethylammonium bromide as a catalyst and 40 milliliters of 1N, N-dimethylformamide, and heat up to 80°C-110°C, after dissolving into a homogeneous phase, slowly drop 0.1 mole of glycidyl alcohol into the system, the reaction process is tracked by the acid value, and the material is discharged when the acid value is constant. Precipitate, separate and purify with water / petroleum ether, and dry in a vacuum oven at 55°C-60°C for 24 hours to obtain hyperbranched polyester for use.

Embodiment 3

[0040] Synthesis of Hyperbranched Polyethers

[0041] Add 40 ml of dichloromethane and 0.1 mole of 3-ethyl-3-hydroxymethylbutene oxide to a two-necked round-bottomed flask that is vacuum-dried, filled with nitrogen, and equipped with a stirring bar, and 0.6 mg of trigger is added with a micro-syringe Agent boron trifluoride etherate complex, the polymerization reaction started at 25 ℃. After the predetermined reaction time is reached, the dichloromethane solution dissolved in phenol is added to the reaction system with a syringe, and the stirring is continued for 3 hours. The mixed solution was washed with distilled water until neutral, the polymer was precipitated and filtered in excess petroleum ether, and the obtained hyperbranched polyether sample was dried at 40°C for 24 hours for use.

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Abstract

The invention discloses a preparing method of effective maleic anhydride system polymeric compound antisludging agent belonging to chemical industry technical and water disposal domain, which comprises the following steps: adding overdraw multi-double bond monomer in the maleic anhydride series antisludging agent synthetic course; proceeding polymerization; increasing molecular weight and combination property of maleic anhydride homopolymer. This invention can be applied to recycle cooling water system, boiler water, oil field water, paper making and seawater desalinization.

Description

technical field [0001] The invention relates to a preparation method of a high-efficiency maleic anhydride polymer scale inhibitor. The antiscalant is used as a dispersed antiscalant for water quality. Background technique [0002] Fields involving water treatment include: industrial circulating cooling water, boiler feed water, papermaking, petroleum industry, seawater desalination, etc. Fouling can have serious consequences for production, reducing production capacity and even causing downtime. In industrial circulating cooling water systems, CaCO 3 It is the most common scale, which often leads to scaling on the inner surface of equipment pipes, affecting water flow and heat transfer efficiency, and can lead to pipe blockage and shutdown in severe cases. In the paper industry, CaCO 3 , BaSO 4 It is a common scale in digesters, raw liquid (untreated raw liquid) pipelines, bleaching units and extraction units. The formation of these scales increases steam consumption, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/00C08F22/06C08F4/28C08F4/40C08F2/38
Inventor 李绵贵王兆惠夏峥嵘杨灿蒋拥华
Owner HAISO TECH
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