Polyaluminum silicate-acrylamide copolymer composite flocculant and preparation method thereof

A technology of acrylamide copolymerization and polyaluminum iron silicate, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of secondary pollution, improvement of water treatment effect, etc., achieve cost saving, strong coagulation ability, and low consumption Effect

A technology of acrylamide copolymerization and polyaluminum iron silicate, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of secondary pollution, improvement of water treatment effect, etc., achieve cost saving, strong coagulation ability, and low consumption Effect

CN105152291BInactive Publication Date: 2017-09-22CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Polyaluminum silicate-acrylamide copolymer composite flocculant and preparation method thereof
  • Polyaluminum silicate-acrylamide copolymer composite flocculant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 10 g Na 2 SiO 3 Add 125 grams of deionized water into a three-necked reaction flask, stir to make a solution, adjust the pH value of the solution to 3 with hydrochloric acid, and react for 2 hours at 25°C to obtain activated silicic acid; the mass fraction of the aluminum component is weighed as 30 grams of 30% aluminum slag, join in the three-necked reaction flask, add iron component, HCl massfraction and be respectively 105 grams of iron-containing waste hydrochloric acid of 15% and 4% and HCl massfraction be 129 grams of industrial hydrochloric acid of 33%, The reaction was stirred at room temperature for 2 hours, separated by filtration, and the filtrate was concentrated to obtain AlCl 3 and FeCl 2 Mixed crystals; 2.7 g of AlCl in 25 g of activated silicic acid 3 and FeCl 2 Mix the crystals, stir the reaction at 45 °C for 2 hours, control the pH value to 2, and then add 0.25 g of KClO 3 , stirred and reacted for 1 hour, the reaction temperature was controlled a...

Embodiment 2

[0025] 10 g Na 2 SiO 3 Add 125 grams of deionized water into a three-necked reaction flask, stir to form a solution, adjust the pH value of the solution to 2.5 with hydrochloric acid, and react for 2 hours at 25°C to obtain activated silicic acid; the mass fraction of the aluminum component is weighed as 30 grams of 25% aluminum ash, join in the three-necked reaction flask, add iron component, HCl massfraction be respectively 10% and 5% iron-containing waste hydrochloric acid 90 grams and HCl massfraction be 118 grams of industrial hydrochloric acid of 33%, The reaction was stirred at room temperature for 2 hours, separated by filtration, and the filtrate was concentrated to obtain AlCl 3 and FeCl 2 Mixed crystals; 7.8 g of AlCl in 25 g of activated silicic acid 3 and FeCl 2 Mix the crystals, stir the reaction at 50 °C for 1.5 hours, control the pH value to 3, then add 0.5 g NaClO 3 , stirred and reacted for 1 hour, the reaction temperature was controlled at 50°C, and lef...

Embodiment 3

[0027] 10 g Na 2 SiO 3 Add 125 grams of deionized water into a three-necked reaction flask, stir to make a solution, adjust the pH value of the solution to 4 with hydrochloric acid, and react for 3 hours at 30°C to obtain activated silicic acid; the mass fraction of the aluminum component is weighed as 30 grams of 40% aluminum slag, join in the three-necked reaction flask, add iron component, HCl massfraction and be respectively 165 grams of iron-containing waste hydrochloric acid of 15% and 4% and HCl massfraction be 231 grams of industrial hydrochloric acid of 33%, The reaction was stirred at room temperature for 1.5 hours, separated by filtration, and the filtrate was concentrated to obtain AlCl 3 and FeCl 2 Mixed crystals; 12.0 g AlCl in 25 g activated silicic acid 3 and FeCl 2 Mix the crystals, stir and react at 50°C for 1.5 hours, control the pH value to 3.5, then add 2.6 grams of NaClO, stir and react for 1 hour, control the reaction temperature at 55°C, let stand a...

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Abstract

The invention discloses a polyaluminum silicate iron-acrylamide copolymer composite flocculant and a preparation method thereof, which is characterized in that 20 parts of Na2SiO3 are added to 250 parts of deionized water, the pH value is 2 to 5, and the reaction is carried out at room temperature for 2 to 3 hours. Prepare activated silicic acid; use aluminum-containing waste, iron-containing waste hydrochloric acid and industrial hydrochloric acid to obtain mixed crystals of AlCl3 and FeCl2; add 1.2 to 25.0 parts of mixed crystals to 25 parts of activated silicic acid, react, stand and mature, and obtain poly Aluminum iron silicate PAFSI; add 20 parts of acrylamide, 75-450 parts of deionized water, 5-20 parts of ionic monomer, and 0.3-6 parts of macromonomer into the reaction bottle, stir, pH value 5-9, pass N2 , add 0.008-0.4 parts of potassium persulfate at 40-70°C, react for 12-36 hours, and prepare the copolymer PAME; add 100 parts of 5 g / L PAME solution into the reaction bottle, and add 12-350 parts under rapid stirring 100 g / L PAFSI solution, pH value 1-4, react at 30-40°C for 2-3 hours, then react at 50-75°C for 2-4 hours, and mature for 24 hours to prepare PAFSI-PAME composite flocculant.

Description

1. Technical field [0001] The invention relates to a polyaluminum silicate-acrylamide copolymer composite flocculant and a preparation method thereof. The flocculant can be used for oil and gas field fracturing flowback fluid, oil and gas field produced water, printing and dyeing, papermaking, textile, steel, brewing, The water treatment of petrochemical, metallurgical and food waste water belongs to the fields of environmental engineering, inorganic chemistry, polymer materials and oilfield chemistry. 2. Technical Background [0002] my country's water resources are short, especially in the northwest region, and all walks of life have serious water pollution due to economic development. Therefore, the protection of water resources and wastewater treatment are major issues of environmental protection in our country. In the process of wastewater treatment, it is divided into primary, secondary and tertiary treatment according to the degree of treatment. The primary treatment ...

Claims

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Application Information

Patent Timeline
22 Sep 2017
Publication
CN105152291B
IPC
C02F1/52; C02F1/56
Inventors
钟传蓉; 孟祥豪