CN109626532A - A kind of oxalic acid scavenger and preparation method thereof and application method - Google Patents
A kind of oxalic acid scavenger and preparation method thereof and application method Download PDFInfo
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- CN109626532A CN109626532A CN201910057725.7A CN201910057725A CN109626532A CN 109626532 A CN109626532 A CN 109626532A CN 201910057725 A CN201910057725 A CN 201910057725A CN 109626532 A CN109626532 A CN 109626532A
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- Prior art keywords
- oxalic acid
- acid scavenger
- aqueous solution
- calcium salt
- phosphate
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/34—Organic compounds containing oxygen
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- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The present invention discloses a kind of oxalic acid scavenger and preparation method thereof and application method, the oxalic acid scavenger, and raw material includes calcium salt, magnesium salts and phosphate, and mass ratio is 1:1:5-1:4:5 between the calcium salt, magnesium salts and phosphate；The oxalic acid scavenger the preparation method comprises the following steps: (1) mixes calcium salt, magnesium salts and phosphate soluble in water, be then heated to 40-70 DEG C, react 1-2 hours；(2) by gained system thermal dehydration, drying in baking oven is placed in when reaction product is largely precipitated, until moisture content obtains oxalic acid scavenger lower than 3%.The present invention can make oxalic acid aqueous solution medium-height grass acid content be down to 500mg/L hereinafter, having achieved the purpose that remove oxalic acid aqueous solution mesoxalic acid.
Description
Technical field
The invention belongs to field of waste water treatment, and in particular to a kind of oxalic acid scavenger and preparation method thereof and application method.
Background technique
Oxalic acid is removed from waste water so that the conventional method of oxalic acid is lead sulfate method and lime-gypsum method.It is with lead sulfate
Intermediate recycles oxalic acid, maximum the disadvantage is that leaded in recovery of oxalic acid waste water, causes environmental pollution.In addition, lead sulfate with
The increase of access times, activity gradually decrease, low so as to cause oxalic acid yield, and production cost increases.
Summary of the invention
To overcome the shortcomings of the existing technology, the present invention provides a kind of oxalic acid scavenger and preparation method thereof.
In order to achieve the above object, the technical solution adopted by the present invention:
A kind of oxalic acid scavenger, raw material include calcium salt, magnesium salts and phosphate, mass ratio between the calcium salt, magnesium salts and phosphate
For 1:1:5-1:4:5；The oxalic acid scavenger the preparation method comprises the following steps: (1) by calcium salt, magnesium salts and phosphate mix it is soluble in water,
It is then heated to 40-70 DEG C, is reacted 1-2 hours；(2) by gained system thermal dehydration, until largely precipitation is reaction product
Only, this solid is placed in drying in 125 DEG C of baking ovens, until moisture content obtains oxalic acid scavenger lower than 3%.
Further, the calcium salt is soluble calcium salt, and the magnesium salts is soluble magnesium salt, and the phosphate is solubility
Phosphate.
Further, the temperature setting of the baking oven is 100-130 DEG C.
The application method of above-mentioned oxalic acid scavenger are as follows: (1) to configure oxalic acid scavenger aqueous solution for oxalic acid scavenger stand-by；
(2) oxalic acid aqueous solution and oxalic acid scavenger aqueous solution are separately added into reactor, are stirred to react 1-2h, control reaction temperature
25-60 DEG C, reaction pressure 1-2bar；(3) after completion of the reaction, reaction solution is sent to solid-liquid separator and is separated by solid-liquid separation, separated
Oxalate precipitation and aqueous solution out.
Further, the oxalic acid scavenger concentration of aqueous solution is 10-50%.
Further, the concentration of the oxalic acid aqueous solution is 1-50%.
Further, the volume ratio of the oxalic acid aqueous solution and oxalic acid scavenger aqueous solution is 100:10.
The beneficial effects of the present invention are:
The three kinds of raw materials and oxalic acid of oxalic acid scavenger of the present invention form the lower precipitating of solubility, wherein the oxalic acid content of aqueous solution
It can be down to 500mg/L hereinafter, having achieved the purpose that remove oxalic acid aqueous solution mesoxalic acid.The preparation method of oxalic acid scavenger of the present invention
Simple to operation, raw material is cheap and easily-available, removes the pollution-free generation of oxalic acid using the present invention.
Detailed description of the invention
Fig. 1 is oxalic acid scavenger preparation method schematic diagram of the present invention.
Specific embodiment
The present invention will be further described with reference to the examples below, and described embodiment is only present invention a part
Embodiment is not whole embodiment.Based on the embodiments of the present invention, those skilled in the art are not making
Other all embodiments obtained, belong to protection scope of the present invention under the premise of creative work.
Embodiment one
A kind of oxalic acid scavenger, raw material include calcium salt, magnesium salts and phosphate, and the calcium salt is soluble calcium salt, and the magnesium salts is
Soluble magnesium salt, the phosphate are soluble phosphate, and mass ratio is 1:1:5 between the calcium salt, magnesium salts and phosphate；
The preparation method of the oxalic acid scavenger, as shown in Figure 1:
The mixing of calcium salt, magnesium salts and phosphate is soluble in water, 40 DEG C are then heated to, is reacted 1 hour, then place the beaker electric furnace
This solid is placed in drying in 100 DEG C of baking ovens, until moisture contains until reaction product is largely precipitated by upper thermal dehydration
Amount is lower than 3%, obtains oxalic acid scavenger.
Embodiment two
A kind of oxalic acid scavenger, raw material include calcium salt, magnesium salts and phosphate, and the calcium salt is soluble calcium salt, and the magnesium salts is
Soluble magnesium salt, the phosphate are soluble phosphate, and mass ratio is 1:2:5 between the calcium salt, magnesium salts and phosphate；
The oxalic acid scavenger the preparation method comprises the following steps:
The mixing of calcium salt, magnesium salts and phosphate is soluble in water, 50 DEG C are then heated to, is reacted 1 hour, then place the beaker electric furnace
This solid is placed in drying in 110 DEG C of baking ovens, until moisture contains until reaction product is largely precipitated by upper thermal dehydration
Amount is lower than 3%, obtains oxalic acid scavenger.
Embodiment three
A kind of oxalic acid scavenger, raw material include calcium salt, magnesium salts and phosphate, and the calcium salt is soluble calcium salt, and the magnesium salts is
Soluble magnesium salt, the phosphate are soluble phosphate, and mass ratio is 1:3:5 between the calcium salt, magnesium salts and phosphate；
The oxalic acid scavenger the preparation method comprises the following steps:
The mixing of calcium salt, magnesium salts and phosphate is soluble in water, 60 DEG C are then heated to, is reacted 1.5 hours, then place the beaker electricity
This solid is placed in drying in 125 DEG C of baking ovens, until moisture until reaction product is largely precipitated by thermal dehydration on furnace
Content is lower than 3%, obtains oxalic acid scavenger.
Example IV
A kind of oxalic acid scavenger, raw material include calcium salt, magnesium salts and phosphate, and the calcium salt is soluble calcium salt, and the magnesium salts is
Soluble magnesium salt, the phosphate are soluble phosphate, and mass ratio is 1:4:5 between the calcium salt, magnesium salts and phosphate；
The oxalic acid scavenger the preparation method comprises the following steps:
The mixing of calcium salt, magnesium salts and phosphate is soluble in water, 70 DEG C are then heated to, is reacted 2 hours, then place the beaker electric furnace
This solid is placed in drying in 130 DEG C of baking ovens, until moisture contains until reaction product is largely precipitated by upper thermal dehydration
Amount is lower than 3%, obtains oxalic acid scavenger.
The application method of oxalic acid scavenger of the present invention: the aqueous solution for first configuring 10-50% for oxalic acid scavenger is stand-by, so
Afterwards by concentration be 1-50% oxalic acid aqueous solution and oxalic acid scavenger aqueous solution according to oxalic acid aqueous solution and oxalic acid scavenger aqueous solution
Volume ratio be 100:10 ratio be pumped into reactor respectively, be stirred to react 1-2h, control 25-60 DEG C of reaction temperature, reaction
Pressure 1-2bar；After completion of the reaction, reaction solution is sent to solid-liquid separator, plate and frame filter press can be selected, be separated by solid-liquid separation, point
Separate out oxalate precipitation and aqueous solution.Wherein the oxalic acid content of aqueous solution can be down to 500mg/L hereinafter, having reached removing oxalic acid water
The purpose of solution mesoxalic acid.
Claims (8)
1. a kind of oxalic acid scavenger, which is characterized in that raw material includes calcium salt, magnesium salts and phosphate, the calcium salt, magnesium salts and phosphoric acid
Mass ratio is 1:1:5-1:4:5 between salt；The oxalic acid scavenger the preparation method comprises the following steps: (1) mixes calcium salt, magnesium salts and phosphate
It closes soluble in water, is then heated to 40-70 DEG C, reacts 1-2 hours；(2) by gained system thermal dehydration, until reaction product is big
Part is placed in drying in baking oven when being precipitated, until moisture content obtains oxalic acid scavenger lower than 3%.
2. oxalic acid scavenger according to claim 1, which is characterized in that the calcium salt is soluble calcium salt, the magnesium salts
For soluble magnesium salt, the phosphate is soluble phosphate.
3. the preparation method of -2 described in any item oxalic acid scavengers according to claim 1, which is characterized in that including following step
It is rapid: (1) it is calcium salt, magnesium salts and phosphate mixing is soluble in water, it is then heated to 40-70 DEG C, is reacted 1-2 hours；(2) by gained
System thermal dehydration is placed in drying in baking oven when reaction product is largely precipitated, until moisture content obtains grass lower than 3%
Sour scavenger.
4. the preparation method of oxalic acid scavenger according to claim 3, which is characterized in that the temperature setting of the baking oven is
100-130℃。
5. the application method of any one of -2 oxalic acid scavengers according to claim 1, which comprises the following steps:
(1) to configure oxalic acid scavenger aqueous solution for oxalic acid scavenger stand-by；(2) by oxalic acid aqueous solution and oxalic acid scavenger aqueous solution point
1-2h Jia Ru not be stirred to react in reactor, control 25-60 DEG C of reaction temperature, reaction pressure 1-2bar；(3) after completion of the reaction,
Reaction solution is sent to solid-liquid separator and is separated by solid-liquid separation, oxalate precipitation and aqueous solution are isolated.
6. the application method of oxalic acid scavenger according to claim 5, which is characterized in that the concentration of the oxalic acid aqueous solution
For 1-50%.
7. the application method of oxalic acid scavenger according to claim 5, which is characterized in that the oxalic acid aqueous solution and oxalic acid
The volume ratio of scavenger aqueous solution is 100:10.
8. the application method of oxalic acid scavenger according to claim 5, which is characterized in that the oxalic acid scavenger aqueous solution
Concentration is 10-50%.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6075392A (en) * | 1983-09-30 | 1985-04-27 | Ebara Infilco Co Ltd | Treatment of organic waste water |
| CN1059512A (en) * | 1990-09-06 | 1992-03-18 | 黄石市实用化工技术研究所 | From antibiotic waste water, reclaim the method for oxalic acid |
| CN103539242A (en) * | 2013-10-15 | 2014-01-29 | 包头稀土研究院 | Method used for reducing calcium content of rare earth industrial wastewater |
| CN103588328A (en) * | 2013-11-26 | 2014-02-19 | 南京大学 | Method for recycling magnesium oxalate in case of treating sewage containing benzene-based pollutants |
| CN106115835A (en) * | 2016-07-22 | 2016-11-16 | 中国科学院长春应用化学研究所 | A kind of processing method of the industrial wastewater containing oxalic acid |
| CN108101288A (en) * | 2017-12-22 | 2018-06-01 | 芜湖德司节能科技有限公司 | A kind of boiler blow-off purifying process of waste water |
-
2019
- 2019-01-22 CN CN201910057725.7A patent/CN109626532A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6075392A (en) * | 1983-09-30 | 1985-04-27 | Ebara Infilco Co Ltd | Treatment of organic waste water |
| CN1059512A (en) * | 1990-09-06 | 1992-03-18 | 黄石市实用化工技术研究所 | From antibiotic waste water, reclaim the method for oxalic acid |
| CN103539242A (en) * | 2013-10-15 | 2014-01-29 | 包头稀土研究院 | Method used for reducing calcium content of rare earth industrial wastewater |
| CN103588328A (en) * | 2013-11-26 | 2014-02-19 | 南京大学 | Method for recycling magnesium oxalate in case of treating sewage containing benzene-based pollutants |
| CN106115835A (en) * | 2016-07-22 | 2016-11-16 | 中国科学院长春应用化学研究所 | A kind of processing method of the industrial wastewater containing oxalic acid |
| CN108101288A (en) * | 2017-12-22 | 2018-06-01 | 芜湖德司节能科技有限公司 | A kind of boiler blow-off purifying process of waste water |
Non-Patent Citations (1)
| Title |
|---|
| 彭存尧等: "从土霉素废母液中回收草酸", 《河南化工》 * |
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