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Environment-friendly branched polyether water treatment agent and preparation method thereof

A technology of water treatment agent and branched polyether, which is applied in the field of high calcium cooling water quality, can solve the problems of poor calcium carbonate scale inhibition effect, poor calcium phosphate inhibition effect and poor ability to disperse iron, and poor calcium phosphate scale inhibition effect and other problems, to achieve the effect of simple and convenient operation, good biodegradability, and green and environment-friendly preparation process

Inactive Publication Date: 2012-12-05
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this type of phosphorus-free carboxylic acid scale inhibitor is mainly used to inhibit calcium carbonate scale, and the scale inhibition effect on calcium phosphate scale is not good, although US patent 5062962 and US5147555 show that PESA 3 and CaSO 4 It has good scale inhibition effect, but the effect on calcium phosphate inhibition and the ability to disperse iron are poor
American Betz Company launched a new generation of sulfonate copolymer AA-APES (acrylic acid allyloxypolyethoxysulfate copolymer) in 2003, its resistance to Ca 3 (PO 4 ) 2 The efficiency of AA-APES is significantly improved, and AA-APES has a higher tolerance to water hardness, suspended solids, and temperature. It is a new generation of Ca 3 (PO 4 ) 2 Phosphorus-free water treatment agent for scale, but APES still contains sulfur elements that cause eutrophication of water sources and the effect of inhibiting calcium carbonate scale is poor

Method used

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  • Environment-friendly branched polyether water treatment agent and preparation method thereof
  • Environment-friendly branched polyether water treatment agent and preparation method thereof

Examples

Experimental program
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Effect test

example 1

[0015] Example 1: at N 2 Add 100g of allyl polyethylene glycol monoether to the protected reactor, add 8g of NaOH to alkalinize at 60°C for 2h, add 60g of glycidyl alcohol at 80°C for 4h, then add 80g of succinic anhydride to react for 2h; After the reaction is completed, adjust the temperature to 75°C, add 100g of acrylic acid and 100g of water, mix well, add potassium persulfate (15g) (dissolved in 100g of water) dropwise, after 3h of dropwise addition, raise the temperature to 80°C and continue the reaction for 5h. After cooling down to room temperature, an environment-friendly dendritic polyether water treatment agent (APEZ) was prepared.

[0016] The obtained APEZ, when the dosage is 6mg / L, has no effect on Ca 3 (PO 4 ) 2 Scale inhibition rate up to 97.6%, for CaCO 3 Scale inhibition rate is 90.1%, for CaSO 4 The scale inhibition rate is 98.8%, and the light transmittance of the solution containing Fe(III), which characterizes the performance of dispersing iron, is 1...

example 2

[0017] Example 2: at N 2 Add 150g of allyl polyethylene glycol monoether to the protected reactor, add 20g of KOH to alkalinize at 65°C for 3h, add 100g of glycidyl alcohol at 80°C for 4h, then add 150g of succinic anhydride to react for 3h After the reaction is completed, adjust the temperature to 75°C, add 120g of maleic anhydride and 220g of water, mix well and add potassium persulfate (20g) (dissolved in 180g of water) dropwise, after 2 hours of dropping, raise the temperature to 90°C to continue After reacting for 4 hours and cooling down to room temperature, an environmentally friendly dendritic polyether water treatment agent (APEZ) was prepared.

[0018] When the obtained APEZ scale inhibitor is added at 6mg / L, the effect on Ca 3 (PO 4 ) 2 Scale inhibition rate up to 98.6%, for CaCO 3 Scale inhibition rate is 91.5%, for CaSO 4 The scale inhibition rate is 99.2%. , the light transmittance of Fe(III)-containing solution, which characterizes the performance of dispe...

example 3

[0019] Example 3: at N 2 Add 180g allyl polyethylene glycol monoether in the reactor of protection, add 30g CH 3 CH 2 After ONa was basified at 55°C for 3h, 200g of glycidyl alcohol was added to react at 80°C for 8h, then 120g of succinic anhydride was added to react for 2h; Acid anhydride, 200g water, mix well, add potassium persulfate (15g), sodium persulfate (15g) mixture (dissolved in 240g water) dropwise, after 3h dropwise addition, raise the temperature to 80°C and continue the reaction for 6h, after cooling down to room temperature, The environment-friendly branched polyether water treatment agent (APEZ) was prepared.

[0020] When the obtained APEZ antiscalant dosage is 8mg / L, to Ca 3 (PO 4 ) 2 Scale inhibition rate up to 97.3%, for CaCO 3 Scale inhibition rate is 91.6%, for CaSO 4 The scale inhibition rate is 98.3%, and the light transmittance of the solution containing Fe(III), which characterizes the performance of dispersing iron, is 14.6%.

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Abstract

The invention provides an environment-friendly branched polyether water treatment agent (APEZ), and relates to a phosphorus-free and nitrogen-free and biodegradable environment-friendly branched polyether water treatment agent and a preparation method of the water treatment agent, belongs to the field of preparation and application of water treatment agents, and is applicable to a circulating cooling water system, in particular to high-calcium cooling water. The water treatment agent is prepared by subjecting polyether carboxylic acid reactive monomer and vinyl unsaturated double-bond containing monomer to free-radical copolymerization, and the water treatment agent has a structural formula shown in the description, wherein A is a repetition structure unit obtained by copolymerizing the vinyl unsaturated double-bond containing monomer, and the repetition structure unit has the polymerization degree x of 1 to 5000, and polymerization degree y of 1 to 5000, and the repetitive unit m is 1 to 100. A dirt dispersion agent is biodegradable, has excellent effect of inhibiting scales from Ca3 (PO4)2, CaCo3 and CaSO4, and high dispersion performance, and is an environment-friendly polyether water treatment agent.

Description

technical field [0001] The invention relates to a phosphorus-free, non-nitrogen biodegradable environmental-friendly polyether water treatment agent and a preparation method thereof, belonging to the preparation and application category of scale inhibitor dispersants, suitable for industrial cooling water circulation systems, especially for high-calcium cooling water water quality. Background technique [0002] With the rapid development of the petroleum, chemical and steel industries, the amount of industrial circulating cooling water and industrial sewage continues to increase. However, there are various salts dissolved in industrial water, such as bicarbonate, carbonate, sulfate, silicate, phosphate, etc. These insoluble salts are deposited on the inner surface of the heat exchange equipment, which will lead to increased fluid flow resistance and poor heat transfer. The efficiency drops sharply, and even the equipment is blocked and the normal production is affected. In...

Claims

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Application Information

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