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Environment-friendly dendritic polyether dirt dispersion agent and preparation method thereof

A scale-inhibiting dispersant and dendritic polyether technology, applied in the field of high-calcium cooling water quality, can solve the problems of increasing industrial application costs, secondary pollution, etc., and achieve good biodegradability, low production costs, and good compatibility Effect

Inactive Publication Date: 2013-11-20
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] ZL200710019339.6 discloses a phosphorus-free allyloxy polyether scale inhibitor and its preparation method, but the preparation process of the scale inhibitor will produce a large amount of difficult-to-handle inorganic waste salt, which will easily cause secondary pollution and increase Its industrial application cost, so the development of low-phosphorus or non-phosphorus and non-nitrogen green multifunctional water treatment agent has increasingly become the focus and focus of attention at home and abroad. The present invention adopts the green reaction process of glycidol ring-opening to prepare the polyether reaction monomer , and then prepared a non-phosphorus, non-nitrogen and biodegradable environmentally friendly dendritic polyether scale inhibitor dispersant

Method used

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  • Environment-friendly dendritic polyether dirt dispersion agent and preparation method thereof
  • Environment-friendly dendritic polyether dirt dispersion agent and preparation method thereof

Examples

Experimental program
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Effect test

example 1

[0018] Example 1: in N 2 Add 120g of allyl polyethylene glycol monoether to the protected reactor, add 10g of NaOH to alkalinize at 65°C for 3h, add 60g of glycidyl alcohol at 80°C for 6h; adjust the temperature to 75°C, add 100g of acrylic acid, 100g of water, mix well, add potassium persulfate (15g) (dissolved in 100g of water) dropwise, after 3 hours of dropwise addition, raise the temperature to 80°C and continue the reaction for 5 hours, after cooling down to room temperature, an environmentally friendly dendrimer Ether antiscalant dispersant (APELL).

[0019] When the obtained APELL dosage is 6mg / L, the Ca 3 (PO 4 ) 2 Scale inhibition rate up to 99.9%, for CaCO 3 Scale inhibition rate is 92.1%, for CaSO 4 The scale inhibition rate is 96.8%, and the light transmittance of the solution containing Fe(III), which characterizes the performance of dispersing iron, is 15.2%.

example 2

[0020] Example 2: in N 2 Add 100g of allyl polyethylene glycol monoether to the protected reactor, add 20g of KOH to alkalinize at 55°C for 3h, add 50g of glycidyl alcohol and react at 80°C for 6h; after adjusting the temperature to 75°C, add 100g maleic anhydride, 220g water, mix well, add potassium persulfate (10g) (dissolved in 180g water) dropwise, after 2h dropwise addition, raise the temperature to 90°C and continue the reaction for 4h, after cooling down to room temperature, the environmentally friendly branch Polyether antiscalant dispersant (APELL).

[0021] When the obtained APELL antiscalant was added at 8mg / L, the effect on Ca 3 (PO 4 ) 2 Scale inhibition rate up to 99.6%, for CaCO 3 Scale inhibition rate is 90.5%, for CaSO 4 The scale inhibition rate is 95.3%. , the light transmittance of the Fe(III)-containing solution, which characterizes the performance of dispersing iron, is 17.1%.

example 3

[0022] Example 3: in N 2 Add 180g allyl polyethylene glycol monoether in the reactor of protection, add 25gCH 3 CH 2 After basifying ONa at 55°C for 3 hours, add 180g glycidol and react at 80°C for 8h; after adjusting the temperature to 75°C, add 80g acrylic acid, 80g maleic anhydride, 200g water, mix well and add persulfuric acid dropwise Potassium (5g), sodium persulfate (10g) mixture (dissolved in 240g water), after 3 hours of dropwise addition, the temperature was raised to 80°C to continue the reaction for 6 hours, and after cooling down to room temperature, an environmentally friendly dendritic polyether scale inhibitor dispersant was prepared (APELL).

[0023]When the obtained APELL scale inhibitor is added at 6mg / L, the effect on Ca 3 (PO 4 ) 2 Scale inhibition rate can reach 97.4%, for CaCO 3 Scale inhibition rate is 90.3%, for CaSO 4 The scale inhibition rate is 95.8%, and the light transmittance of the solution containing Fe(III), which characterizes the p...

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Abstract

The invention discloses an environment-friendly dendritic polyether dirt dispersion agent (APELL), relates to an environment-friendly dendritic polyether dirt dispersion agent which is free from phosphorus, is not nitrogen and is biodegradable, and a preparation method thereof and belongs to the preparation and application range of water treatment agent. The environment-friendly dendritic polyether dirt dispersion agent is suitable for a circulating cooling water system, and is especially suitable for high-calcium cooling water quality. The environment-friendly dendritic polyether dirt dispersion agent is obtained by the free radical copolymerization of a polyether carboxylic acid reaction monomer and vinyl-contained unsaturated double-bond monomer. The environment-friendly dendritic polyether dirt dispersion agent has a general structure formula shown in the specification, wherein A is a copolymerized repeated structure after the vinyl-contained unsaturated double-bond monomer is copolymerized, a polymerization degree x is 1-5000, a polymerization degree y is 1-5000, and a repeated unit m is 1-100. The dirt dispersion agent is biodegradable, has excellent effect on resisting Ca3(PO4)2, CaCO3 and CaSO4 scales, has good dispersion performance and is the environment-friendly polyether multifunctional water treatment agent.

Description

technical field [0001] The invention relates to a non-phosphorous, non-nitrogen biodegradable environmentally friendly polyether scale-inhibiting dispersant and a preparation method thereof, which belongs to the category of preparation and application of scale-inhibiting dispersants, and is suitable for industrial cooling water circulation systems, especially for high-calcium cooling water quality. Background technique [0002] Ca in industrial cooling water circulation systems 2+ , Mg 2+ 、Ba 2+ and small amounts of other cations such as Fe 2+ , Fe 3+ 、Cu 2+ 、A1 3+ , Zn 2+ Etc, there is also SO 4 2- , CO 3 2- , OH - 、HCO 3 - 、PO 4 3- , SiO 3 2- The scale-forming anions greatly exceed their saturation solubility, and are easy to precipitate out of water to form scale. Scale inhibitors are chemical agents that can prevent the generation of scale and dirt or inhibit their deposition and growth. At present, the research on organic polymer scale inhibitors at h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F5/10
Inventor 周钰明凌磊黄镜怡姚清照刘广卿张培新吴文导孙伟
Owner SOUTHEAST UNIV
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