Method for preparing polychlorinated ferric sulfate water purifying agent from iron-containing wastewater produced by potassium fluorotitanate

Abstract

The invention relates to a method for preparing a polychlorinated ferric sulfate water purifying agent from iron-containing wastewater produced by potassium fluorotitanate. It uses the iron-containing wastewater discharged from the production of potassium fluorotitanate directly as raw material, adjusts the total iron concentration and acidity by adding green vitriol and industrial sulfuric acid, and adds phosphate-tartrate composite stabilizer. A technical scheme in which Fe2+ is oxidized to Fe3+ at 60-90°C and then hydrolyzed and polymerized to form polyferric sulfate chloride. The method of the present invention makes full use of the iron-containing wastewater produced by potassium fluorotitanate to prepare highly efficient polymerized ferric sulfate chloride, which overcomes the defects of poor treatment process effect and serious secondary pollution of the original iron-containing wastewater; not only realizes fluorotitanic acid Zero discharge of potassium production wastewater, and no new pollution, achieved the purpose of turning waste into wealth. The method of the invention has simple technological process, mild conditions, easy operation and control, no need for special or complex equipment, less investment, quick results, significant economic and environmental benefits, and is convenient for popularization and industrialization. The product of the invention is suitable as a treatment agent for various industrial waste water and domestic sewage, especially for high turbidity sewage.

Description

technical field

[0001] The invention relates to the field of environmental protection and resource utilization, in particular to a method for preparing a polychlorinated ferric sulfate water purifying agent from iron-containing wastewater produced by potassium fluorotitanate. Background technique

[0002] Potassium fluorotitanate is mainly used in aluminum processing and light metal smelting, as an additive in the manufacture of aluminum, titanium, and boron alloys; it can also be used as a catalyst for polypropylene synthesis, rubber gelling agent, raw material for titanium metal, and titanium Manufacturing, leather and cotton fabric mordant, etc. The general method for the production of potassium fluorotitanate is as follows: hydrofluoric acid reacts with ilmenite to form ferro-titanium hexafluoride, and then reacts with KCl to form potassium fluorotitanate. A large amount of wastewater is generated during the production process, and the amount of wastewater generated is ...

Examples

Embodiment 1

[0032] (1) Add 75L of iron-containing waste water produced by filtered potassium fluotitanate into a 150L corrosion-resistant reactor, add 62kg of vitriol and 3.84L of industrial sulfuric acid with a concentration of 98% by mass, and then add dihydrogen phosphate Sodium-sodium tartrate composite stabilizer (the mol ratio of sodium tartrate and phosphorus is 0.1: 1) 4.60kg, be warming up to 50 ℃ of dissolvings and make solution;

[0033] (2) Slowly add a saturated solution containing 4.72kg of sodium chlorate dropwise to the above solution, and react at 60-70°C for 1 hour to obtain a dark red transparent viscous liquid, and measure its T Fe=10.52%, B=7.11%, density ρ=1.41g / cm 3 (20°C), sample A, that is, water purifying agent.

Embodiment 2

[0035] (1) Add 75L of iron-containing waste water produced by filtered potassium fluotitanate into a 150L corrosion-resistant reactor, add 62kg of vitriol and 3.38L of industrial sulfuric acid with a concentration of 98% by mass, and then add dihydrogen phosphate Sodium-sodium tartrate composite stabilizer (the mol ratio of sodium tartrate and phosphorus is 0.126: 1) 5.02kg, be warming up to 60 ℃ of dissolvings and make solution;

[0036] (2) Slowly add a saturated solution containing 4.82kg of sodium chlorate dropwise to the above solution, and react at 70-80°C for 1 hour to obtain a dark red transparent viscous liquid, and measure its T Fe =10.67%, B=8.41%, density ρ=1.42g / cm 3 (20°C), sample B, that is, water purifying agent.

Embodiment 3

[0038] (1) Add 75L of iron-containing waste water produced by filtered potassium fluotitanate into a 150L corrosion-resistant reactor, add 62kg of vitriol and 3.14L of industrial sulfuric acid with a concentration of 98% by mass, and then add dihydrogen phosphate Sodium-sodium tartrate composite stabilizer (the mol ratio of sodium tartrate and phosphorus is 0.15: 1) 5.34kg, be warming up to 70 ℃ of dissolvings and make solution;

[0039] (2) Slowly add a saturated solution containing 4.96kg of sodium chlorate dropwise to the above solution, and react at 70-80°C for 1 hour to obtain a dark red transparent viscous liquid, and measure its T Fe =11.34%, B=9.03%, density ρ=1.43g / cm 3 (20°C), sample C, that is, water purifying agent.

technical field

[0001] The invention relates to the field of environmental protection and resource utilization, in particular to a method for preparing a polychlorinated ferric sulfate water purifying agent from iron-containing wastewater produced by potassium fluorotitanate. Background technique

[0002] Potassium fluorotitanate is mainly used in aluminum processing and light metal smelting, as an additive in the manufacture of aluminum, titanium, and boron alloys; it can also be used as a catalyst for polypropylene synthesis, rubber gelling agent, raw material for titanium metal, and titanium Manufacturing, leather and cotton fabric mordant, etc. The general method for the production of potassium fluorotitanate is as follows: hydrofluoric acid reacts with ilmenite to form ferro-titanium hexafluoride, and then reacts with KCl to form potassium fluorotitanate. A large amount of wastewater is generated during the production process, and the amount of wastewater generated is ...

Examples

Embodiment 1

[0032] (1) Add 75L of iron-containing waste water produced by filtered potassium fluotitanate into a 150L corrosion-resistant reactor, add 62kg of vitriol and 3.84L of industrial sulfuric acid with a concentration of 98% by mass, and then add dihydrogen phosphate Sodium-sodium tartrate composite stabilizer (the mol ratio of sodium tartrate and phosphorus is 0.1: 1) 4.60kg, be warming up to 50 ℃ of dissolvings and make solution;

[0033] (2) Slowly add a saturated solution containing 4.72kg of sodium chlorate dropwise to the above solution, and react at 60-70°C for 1 hour to obtain a dark red transparent viscous liquid, and measure its T Fe=10.52%, B=7.11%, density ρ=1.41g / cm 3 (20°C), sample A, that is, water purifying agent.

Embodiment 2

[0035] (1) Add 75L of iron-containing waste water produced by filtered potassium fluotitanate into a 150L corrosion-resistant reactor, add 62kg of vitriol and 3.38L of industrial sulfuric acid with a concentration of 98% by mass, and then add dihydrogen phosphate Sodium-sodium tartrate composite stabilizer (the mol ratio of sodium tartrate and phosphorus is 0.126: 1) 5.02kg, be warming up to 60 ℃ of dissolvings and make solution;

[0036] (2) Slowly add a saturated solution containing 4.82kg of sodium chlorate dropwise to the above solution, and react at 70-80°C for 1 hour to obtain a dark red transparent viscous liquid, and measure its T Fe =10.67%, B=8.41%, density ρ=1.42g / cm 3 (20°C), sample B, that is, water purifying agent.

Embodiment 3

[0038] (1) Add 75L of iron-containing waste water produced by filtered potassium fluotitanate into a 150L corrosion-resistant reactor, add 62kg of vitriol and 3.14L of industrial sulfuric acid with a concentration of 98% by mass, and then add dihydrogen phosphate Sodium-sodium tartrate composite stabilizer (the mol ratio of sodium tartrate and phosphorus is 0.15: 1) 5.34kg, be warming up to 70 ℃ of dissolvings and make solution;

[0039] (2) Slowly add a saturated solution containing 4.96kg of sodium chlorate dropwise to the above solution, and react at 70-80°C for 1 hour to obtain a dark red transparent viscous liquid, and measure its T Fe =11.34%, B=9.03%, density ρ=1.43g / cm 3 (20°C), sample C, that is, water purifying agent.

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