Preparation method of nano-Fe(OH)3-containing acrylamide-grafted copolymer flocculant

Abstract

The invention discloses a preparation method of a nano-Fe(OH)3-containing acrylamide-grafted copolymer flocculant. The method is characterized in that 100 mL of a 100 g / L FeCl3 ethylene glycol solution is added to a three-neck reaction flask, 90-300 ml of a 40 g / L NaOH ethylene glycol solution is slowly added in the stirring state, the mixture reacts at the reaction temperature of 120-160 DEG C for 2-4 h in the rapid stirring state and then the product after reaction is cooled to the room temperature, reaction products are centrifugally separated and washed with deionized water, and nano-Fe(OH)3 is prepared; 20 parts of acrylamide are added to the three-neck reaction flask, then 150-600 parts of deionized water and 1.0-12 parts of trimethyl hexadecyl ammonium chloride are added, the mixture is stirred, 0.5-8 parts of the nano-Fe(OH)3 are added in the stirring state, 8-40 parts of cationic monomers and 0.8-10 parts of macromonomers are added, the mixture is stirred for 30 min, the pH value is 5-8, N2 is introduced for 30 min, 0.02-0.6 parts of an initiator, namely, potassium persulfate, is added at the temperature of 50-75 DEG C, the mixture reacts for 8-24 h, and the nano-Fe(OH)3-containing acrylamide-grafted copolymer flocculant Fe(OH)3-PAMB with excellent coagulation performance is prepared.

Description

1. Technical field [0001] The present invention relates to a kind of nano Fe (OH) containing 3 The preparation method of grafted acrylamide copolymer flocculant, this flocculant can be used in oil and gas field fracturing flowback fluid, oil and gas field produced water, printing and dyeing, papermaking, textile, steel, brewing, petrochemical, metallurgy and food and other waste water It belongs to the fields of environmental engineering, inorganic chemistry, polymer materials and oil field chemistry. 2. Technical background [0002] With the development of my country's industrial and agricultural economy and the increase in the development of oil and gas resources, the total discharge of industrial and urban domestic wastewater is increasing year by year, resulting in serious waste of water resources. Therefore, how to reduce water treatment costs and improve wastewater treatment efficiency is a protection Water resources urgently need to be solved, and the development of e...

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Problems solved by technology

[0003] The purpose of the present invention is to aim at the present compounding with inorganic macromolecular flocculant, the dosage of organic macromolecular flocculant is relatively high, the effect of removing soluble inorganic and organic pollutants is relatively poor, and the high salinity waste water Weak coagulation ability, high residual aluminum and COD in the effluent, etc., provide a kind of nano-Fe(OH) containing nano-Fe(OH) 3 The preparation method of particle grafted acrylamide copolymer flocculant is characterized in that FeCl 3 and NaOH as raw materials to prepare nano-Fe(OH) 3 ; With nanometer Fe(OH) 3 As inorganic nanoparticles doped, with acrylamide AM as the main hydrophilic monomer, macromonomer 4-vinylbenzyl alkylphenol polyoxyethylene ether CH 2 =CH-C 6 h 4 -CH 2 (OCH 2 CH 2 ) n -O-C 6 h 4 -C m h 2m+1 , n=16~100, m=1~9 and 4-vinylbenzyl alkyl polyoxyethylene ether CH 2 =CH-C 6 h 4 -CH 2 (OCH 2 CH 2 ) n -O-C m h 2m+1 , n=16~100, at least one of m=1~9 is used as a functional comonomer, and the cationic monomer dimethyl diallyl ammonium chloride, ethyl methacrylate trimethyl ammonium chloride , ethyl acrylate trimethyl ammonium chloride and 2-acrylamido-2-methyl propyl trimethyl ammonium chloride as another comonomer, prepared nano Fe(OH ) 3 Graft acrylamide copolymer Fe(OH) 3 -PAMB

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