Advanced treatment magnetic resin for recycling sewage landscape containing two quaternary ammonium sites and capable of synchronously removing nitrogen and phosphorus and preparation method of advanced treatment magnetic resin

A magnetic resin and advanced treatment technology, applied in the field of resin materials, can solve the problems of the easily damaged release mechanical strength of the magnetic core, the low selectivity of nitrogen and phosphorus substances, the secondary pollution of water bodies, etc., and achieves good recycling effect, simple preparation method, Reduce the effect of shattering

Active Publication Date: 2022-07-29
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the continuous use of mechanical stirring, the magnetic core inside the resin is easily released due to resin damage, so the resin must have a certain mechanical strength. Common magnetic polyacrylic resins have poor mechanical strength, which can easily lead to resin loss and water secondary. Pollution
In addition, there are currently few reports on magnetic ion exchange resins for the simultaneous removal of nitrogen and phosphorus in secondary effluent. It is of great significance to develop a new type of magnetic ion exchange resin for simultaneous removal of nitrogen and phosphorus in sewage landscape reuse advanced treatment
At the same time, the existing magnetic resins have low exchange capacity, low selectivity of nitrogen and phosphorus substances, poor hydrophilicity, easy damage and release of the magnetic core, and low mechanical strength.

Method used

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  • Advanced treatment magnetic resin for recycling sewage landscape containing two quaternary ammonium sites and capable of synchronously removing nitrogen and phosphorus and preparation method of advanced treatment magnetic resin
  • Advanced treatment magnetic resin for recycling sewage landscape containing two quaternary ammonium sites and capable of synchronously removing nitrogen and phosphorus and preparation method of advanced treatment magnetic resin
  • Advanced treatment magnetic resin for recycling sewage landscape containing two quaternary ammonium sites and capable of synchronously removing nitrogen and phosphorus and preparation method of advanced treatment magnetic resin

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preparation example Construction

[0058] A preparation method of the above-mentioned magnetic resin for advanced treatment of sewage landscape reuse containing two types of quaternary ammonium sites for simultaneous removal of nitrogen and phosphorus. Agent and modified magnetic particles are mixed into an oil phase, and after mixing, a suspension polymerization is carried out in the water phase, and the magnetic white spheres after the primary polymerization are further subjected to secondary polymerization to obtain secondary copolymerized magnetic microspheres. The ester group is sequentially aminated and alkylated to form a type of quaternary ammonium salt, the epoxy group and the amine salt are further reacted to obtain another type of quaternary ammonium salt, and finally the double bond on the other side of the benzene ring on the cross-linking agent is carried out. After the post-crosslinking reaction, a magnetic strong basic anion resin containing two types of quaternary ammonium sites for simultaneous...

Embodiment 1

[0123] Dissolve 3.0g γ-iron trioxide in 200mL deionized water in a 250mL conical flask, add 25mL ammonia water (25-28wt%), 2.5mL oleic acid, 13mL acetone, stir mechanically in a water bath at 80°C for 30min, wash with ethanol for 3 times, The oleic acid modified magnetic powder was obtained by washing with ultrapure water for 3 times and drying at 60°C. The oil phase was added to the 250ml conical flask dried above, and the oil phase contained 10.0g methyl methacrylate, 2.0g divinylbenzene, 2.0g glycidyl methacrylate, 0.3g 3,4-epoxy-1 - Butene, 0.24 g dibenzoyl peroxide, 8 mL toluene and 6 mL n-heptane. Add 1.8g of polyvinyl alcohol, 1.8g of polyvinylpyrrolidone and 8g of NaCl to 200mL of deionized water as the water phase, transfer the water phase to the oil phase, and then transfer the 250ml conical flask with a stopper to a water bath, and use temperature-programmed heating , the temperature was raised from room temperature to 70°C, and the heating rate was 1°C / min. After ...

Embodiment 2

[0127] Dissolve 2.5g γ-iron trioxide in 200mL deionized water in a 250mL conical flask, add 25mL ammonia water (25-28wt%), 2.5mL oleic acid, 13mL acetone, stir mechanically in a water bath at 80°C for 30min, wash with ethanol 3 times, Washed with ultrapure water 3 times and dried at 60°C. Add the oil phase to the 250ml Erlenmeyer flask dried above, the oil phase contains 10.0g ethyl 2-ethyl acrylate, 2.0g divinylbenzene, 2.0g glycidyl methacrylate, 0.5g 3,4-epoxy -1-Butene, 0.24 g dibenzoyl peroxide, 8 mL toluene and 6 mL n-heptane. Add 1.8g of polyvinyl alcohol, 1.8g of polyvinylpyrrolidone and 8g of KCl to 200mL of deionized water as the water phase, transfer the water phase to the oil phase, and then transfer the 250ml conical flask with a stopper to a water bath, and use temperature-programmed heating , the temperature was raised from room temperature to 70°C, and the heating rate was 1°C / min. After 150 minutes of reaction, the temperature was raised to 80°C at the same h...

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Abstract

The invention discloses a sewage landscape reuse advanced treatment magnetic resin containing two quaternary ammonium sites and capable of synchronously removing nitrogen and phosphorus and a preparation method of the sewage landscape reuse advanced treatment magnetic resin. The magnetic resin is composed of a strong base anion exchange resin framework containing two quaternary ammonium salt active sites and magnetic particles wrapped in the strong base anion exchange resin framework. The preparation method comprises the following steps: uniformly mixing a quaternary ammonium salt with a cross-linking agent, a pore-foaming agent, an initiator and modified magnetic particles to form an oil phase, carrying out primary suspension polymerization in a water phase after uniform mixing, carrying out secondary polymerization after primary polymerization to obtain secondary copolymerized magnetic microspheres, and carrying out amination and alkylation reactions on ester groups on the secondary copolymerized magnetic microspheres in sequence to form quaternary ammonium salts. The preparation method comprises the following steps: carrying out a reaction on an epoxy group and an amine salt to obtain another quaternary ammonium salt, and finally carrying out a post-crosslinking reaction on a double bond on the other side of a benzene ring on a crosslinking agent to obtain the magnetic strong-basicity anion resin containing two quaternary ammonium sites, which can be used for removing nitrogen and phosphorus substances in actual secondary effluent so as to meet the nitrogen and phosphorus standards in urban sewage landscape utilization standards.

Description

technical field [0001] The invention belongs to the field of resin materials, and relates to a magnetic resin and a preparation method thereof, in particular to a magnetic resin containing two types of quaternary ammonium active sites, which is coated with modified magnetic particles and used for adsorption and removal of nitrogen-containing and phosphorus-containing substances in advanced sewage treatment. Magnetic strong basic anion exchange resin and preparation method thereof. Background technique [0002] With the development of the economy and the progress of society, the shortage of water resources has become a serious problem affecting human activities on a global scale. my country is one of the many water-scarce regions. The current situation of water shortage in my country is mainly manifested in uneven distribution of water resources and serious water pollution. Utilizing the secondary effluent of the urban sewage plant and developing the reuse of reclaimed water...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F101/10C02F101/16
CPCB01J20/267B01J20/28009C02F1/285B01J20/28011C02F2101/105C02F2101/16
Inventor 陈志强唐英才温沁雪
Owner HARBIN INST OF TECH
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