CN102120635B - Preparation method of water treatment coagulant - Google Patents
Preparation method of water treatment coagulant Download PDFInfo
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- CN102120635B CN102120635B CN2011100204325A CN201110020432A CN102120635B CN 102120635 B CN102120635 B CN 102120635B CN 2011100204325 A CN2011100204325 A CN 2011100204325A CN 201110020432 A CN201110020432 A CN 201110020432A CN 102120635 B CN102120635 B CN 102120635B
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- coagulant
- water treatment
- rare earth
- sodium hydroxide
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Abstract
The invention relates to a preparation method of a water treatment coagulant, belonging to the field of water treatment. The preparation method comprises the following steps: mixing dried Baotou rare earth concentrate and sodium hydroxide solution in a proportion of (7-9g): (100-150mL), and carrying out boiling reaction for 3-5 hours at the temperature of 100 DEG C to prepare mother liquid, wherein the mole concentration of the sodium hydroxide solution is 3-5 mol/L, solid sodium hydroxide in one liter of solution is 120g-200g; and heating and curing the filtrated mother liquid for 1 hour-3 hours in a constant-temperature water bath at the temperature of 60-80 DEG C to obtain bright yellow transparent liquid. When the preparation method is used for water treatment, the coagulation effect of the coagulant prepared by the method is obviously superior to that of the conventional coagulant; compared with the traditional commercial coagulant, the prepared rare earth coagulant has the characteristics of less dosage, rapid flocculation speed, compact flocculation body, good sedimentation performance, and the like and ensures better treated water quality; and by using the coagulant provided by the method, sludge treatment expenditure can be saved.in the process of water treatment, which. The invention is another development of the application of rear earth in the field of water treatment.
Description
Technical field
The present invention relates to a kind of preparation method of water treatment coagulant, belong to water treatment field.
Background technology
The coagulating agent that water treatment is at present used is more, and the document of relevant coagulating agent is also a lot.Because rare earth has been obtained original achievement in the application of field of environment protection in recent years.Disclose in 2009101427751 like China and a kind ofly to be mixed with a kind of rare earth coagulant for water treatment according to corresponding proportion with rare earth ore concentrate and hydrochloric acid.But, in use has corrodibility because the coagulating agent mother liquor of its preparation is a strongly-acid.
Summary of the invention
The object of the present invention is to provide the preparation method of the water treatment coagulant that a kind of coagulation effect is good, drug dosage is few, settling velocity is fast, sludge volume is few.
Technical solution:
Preparing method of the present invention is following:
(1) Baotou rare earth ore concentrate is eluriated, and dries in the baking oven;
(2) Baotou rare earth ore concentrate after will drying mixes with sodium hydroxide solution; Baotou rare earth ore concentrate: sodium hydroxide solution=7-9g: 100-150mL; The volumetric molar concentration of sodium hydroxide solution: 3～5mol/L; Containing solid sodium hydroxide in every liter of solution is 120g-200g, is 100 ℃ of following boiling reaction 3h-5h in temperature, processes mother liquor;
(3) reacted mother liquor leaches, filtrate for later use, filter residue recycling;
(4) mother liquor that leaches is put into thermostat water bath, and gained glassy yellow transparent liquid is prepared alkaline process rare earth coagulant after adding thermomaturation 1h-3h under 60 ℃ of-80 ℃ of temperature.
The present invention produces after mainly utilizing Baotou rare earth ore concentrate and alkali (NaOH) hybrid reaction.The prepared coagulating agent of the present invention is used for the processing of water, and coagulation effect obviously is superior to conventional coagulating agent.Coagulating agent with tradition is commercially available is compared, and prepared rare earth coagulant has that consumption is few, flocculation rate is fast, flco is closely knit, settling property is good, the more excellent characteristics of effluent quality, especially in the removal of turbidity, obviously is better than other coagulating agent; Also fine to subsequent disposal on mud forms, in water treatment technological process, can save the sludge treatment expense, be rare earth expanding again in water treatment field.
Embodiment
Embodiment 1:
Get the Baotou rare earth ore concentrate after 7 grams are dried, put it in the flask, and adding concentration is the sodium hydroxide solution 100ml (promptly containing solid sodium hydroxide is 12g) of 3mol/L; Process mother liquor at 100 ℃ of heating 4h that seethe with excitement down; Mother liquor after having reacted is used vacuum suction filter, and filtrate concentrates the filter residue recycling in order to follow-up; Filtrate is put into thermostat water bath, under 70 ℃ of temperature, add thermomaturation 2h, made glassy yellow transparent liquid is the gained coagulating agent.
With the Huanghe water is water quality treatment, post precipitation, and recording the supernatant turbidity is 106NTU, gets its 1000ml and drops into prepared coagulating agent 4ml, carries out coagulation experiment, the turbidity that post precipitation records water outlet is 0.68NTU, goes turbid rate to reach 99.36%.
Embodiment 2:
Get the rare earth after 8 grams are dried, put it into the sodium hydroxide solution 100ml (promptly containing sodium hydroxide is 20g) that slowly adds 5mol/L in the flask; Process mother liquor at 100 ℃ of heating 4h that seethe with excitement down; Mother liquor after having reacted is used vacuum suction filter, and filtrate concentrates in order to follow-up.The calculating dissolution rate of weighing after the filter residue oven dry, and reclaim in order to utilizing again.Filtrate is put into thermostat water bath, under 70 ℃ of temperature, adds thermomaturation 3h.Made glassy yellow transparent liquid is the gained coagulating agent.
With the Huanghe water is water quality treatment, post precipitation, and recording the supernatant turbidity is 102NTU, gets its 1000ml and drops into prepared coagulating agent 4ml, carries out coagulation experiment, the turbidity that post precipitation records water outlet is 0.80NTU, goes turbid rate to reach 99.21%.
Claims (1)
1. the preparation method of water treatment coagulant is characterized in that, comprises the steps:
(1) Baotou rare earth ore concentrate is eluriated, and dries in the baking oven;
(2) rare earth ore concentrate after will drying mixes rare earth ore concentrate with sodium hydroxide solution: sodium hydroxide solution=7-9g: 100-150mL, and the volumetric molar concentration of sodium hydroxide solution: 3～5mol/L, temperature: 100 ℃ of following boiling reaction 3h-5h, process mother liquor;
(3) reacted mother liquor leaches, filtrate for later use, filter residue recycling;
(4) mother liquor that leaches is put into thermostat water bath, after adding thermomaturation 1h-3h under 60 ℃ of-80 ℃ of temperature, gets the glassy yellow transparent liquid and is prepared alkaline process rare earth coagulant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100204325A CN102120635B (en) | 2011-01-07 | 2011-01-07 | Preparation method of water treatment coagulant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100204325A CN102120635B (en) | 2011-01-07 | 2011-01-07 | Preparation method of water treatment coagulant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102120635A CN102120635A (en) | 2011-07-13 |
| CN102120635B true CN102120635B (en) | 2012-07-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100204325A Expired - Fee Related CN102120635B (en) | 2011-01-07 | 2011-01-07 | Preparation method of water treatment coagulant |
Country Status (1)
| Country | Link |
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| CN (1) | CN102120635B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102765795B (en) * | 2012-07-20 | 2013-12-04 | 杨国录 | Fast Yellow River slurry separation agent and separation method of Yellow River slurry |
| CN103539240A (en) * | 2013-02-06 | 2014-01-29 | 盐城工学院 | Method for preparing rare-earth-waste-residue coagulant |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1385373A (en) * | 2001-05-15 | 2002-12-18 | 中国科学院南京土壤研究所 | Coagulant for sewage treatment |
| CN1478806A (en) * | 2002-08-29 | 2004-03-03 | 中国石油化工股份有限公司 | Preparation method of polysilicate flocculant |
| CN1693493A (en) * | 2005-05-08 | 2005-11-09 | 西安西骏新材料有限公司 | Recovery method of valuable element in neodymium iron boron waste material |
| CN1796301A (en) * | 2004-12-27 | 2006-07-05 | 北京博泰盛合科技有限公司 | Magnetcisuspension polycoagulant, preparation method and application |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006026588A (en) * | 2004-07-20 | 2006-02-02 | Japan Atom Energy Res Inst | Method for recovering and removing useful or harmful metal dissolved in hot-spring water |
-
2011
- 2011-01-07 CN CN2011100204325A patent/CN102120635B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1385373A (en) * | 2001-05-15 | 2002-12-18 | 中国科学院南京土壤研究所 | Coagulant for sewage treatment |
| CN1478806A (en) * | 2002-08-29 | 2004-03-03 | 中国石油化工股份有限公司 | Preparation method of polysilicate flocculant |
| CN1796301A (en) * | 2004-12-27 | 2006-07-05 | 北京博泰盛合科技有限公司 | Magnetcisuspension polycoagulant, preparation method and application |
| CN1693493A (en) * | 2005-05-08 | 2005-11-09 | 西安西骏新材料有限公司 | Recovery method of valuable element in neodymium iron boron waste material |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2006-26588A 2006.02.02 |
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| CN102120635A (en) | 2011-07-13 |
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