CN1040772A - Utilize saponification waste liquid to produce the method for yellow soda ash - Google Patents
Utilize saponification waste liquid to produce the method for yellow soda ash Download PDFInfo
- Publication number
- CN1040772A CN1040772A CN88106226A CN88106226A CN1040772A CN 1040772 A CN1040772 A CN 1040772A CN 88106226 A CN88106226 A CN 88106226A CN 88106226 A CN88106226 A CN 88106226A CN 1040772 A CN1040772 A CN 1040772A
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- CN
- China
- Prior art keywords
- waste liquid
- soda ash
- yellow soda
- saponification waste
- produce
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D7/00—Carbonates of sodium, potassium or alkali metals in general
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/40—Valorisation of by-products of wastewater, sewage or sludge processing
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
A kind of method of utilizing saponification waste liquid to produce yellow soda ash, be that the saponification waste liquid evaporation concentration that will contain RCOONa (wherein R can be hydrogen, straight-chain paraffin, naphthenic hydrocarbon or aromatic hydrocarbon group) gets slag, rough yellow soda ash is made in the slag burning, rough yellow soda ash is used water dissolution again, after filtration, filtrate evaporate to dryness, dry prepared calcium carbonate sodium.This method technical process is short, and equipment is simple, less investment, and the yield height, products obtained therefrom yellow soda ash quality is better than national industrial monohydrate first grade standard.Simultaneously can eliminate the pollution of saponification waste liquid effectively to environment.
Description
The present invention relates to a kind of wastewater treatment method, belong to the method that a kind of saponification waste liquid effectively utilizes specifically, promptly utilize saponification waste liquid to produce the method for yellow soda ash.
Saponification waste liquid is to produce in some Chemicals process with in the sodium hydroxide and the waste liquid that produces of organic acid or hydrolysis organic acid acetic, and it contains organic acid sodium salt, and its general formula is RCOONa.As the saponification waste liquid that produces in the domestic production hexanolactam process, except that containing lot of organic acids salt, also contain other organism, the chemical oxygen demand cod that discharges them is up to 3 * 10
5Mg/l is 3000 times of trade effluent maximum allowable concentration.This waste liquid directly enters environment for a long time, causes severe contamination.
In order to eliminate the pollution of saponification waste liquid to environment, reclaim useful matter simultaneously, domestic have individual factory to adopt the acidifying isolation technique to handle above-mentioned waste liquid, promptly in saponification waste liquid, add strong acid and make it reaction, it is upper and lower two-layer that waste liquid is divided into, and the upper strata is the organic acid mixture, and lower floor is an inorganic sodium.But the waste liquid COD clearance after this method is handled is lower, and the material that obtains not is single purified compound, industrial not good utilisation.And use strong acid in the technological process, serious to equipment corrosion.
The object of the present invention is to provide a kind of pollution that can eliminate saponification waste liquid to environment, can produce the method for prepared calcium carbonate sodium again.
The present invention utilizes saponification waste liquid to produce the method for yellow soda ash, mainly contains the RCOONa compound in saponification waste liquid, and wherein R can be hydrogen, straight-chain paraffin, naphthenic hydrocarbon, aromatic hydrocarbon group, it is characterized in that:
The saponification waste liquid evaporation concentration that a. will contain above-claimed cpd gets slag, then,
B. slag is placed under 650-850 ℃, normal pressure, the blowing air burning got rough yellow soda ash (carbonate content 95%) in 20-60 minute.
C. above-mentioned rough yellow soda ash is at room temperature used water dissolution, after filtration, with filtrate evaporate to dryness, dry prepared calcium carbonate sodium (carbonate content 99%).
Produce in the yellow soda ash method at saponification waste liquid of the present invention, at first saponification waste liquid evaporation concentration to water removal rate is reached 70%, the slag that obtains send the roasting kiln burning again.Evaporation concentration can adopt evaporation, condensing equipment to carry out in industrial production, and the gained water of condensation still contains organic matters, but it can reuse, or dilution discharge, thereby has solved the secondary pollution problem.
1 liter of saponification waste liquid can get 300 gram condensed slags among the present invention, with slag place roasting kiln under 650-850 ℃, normal pressure, blowing air burning 20-60 minute, the selection of temperature of combustion is very important, temperature is too high, yellow soda ash can resolve into sodium oxide and carbonic acid gas, and temperature crosses that low then combustion reaction time is long, and the yellow soda ash yield is low.Preferred temperature range is 730-770 ℃, 30-40 minute combustion time.The solid that obtains after burning is rough yellow soda ash, and wherein the content of yellow soda ash can reach about 95%.
Rough yellow soda ash at room temperature is dissolved in water, in order to save water and energy, can be according to yellow soda ash saturation solubility at room temperature, excessive a little water also can be tap water.Yellow soda ash after being dissolved in water branches away insolubles with filtering method, and why selecting the room temperature dissolving is because temperature is too high, can cause other carbonate and metal hydroxides soluble in water, thereby influence the purity of yellow soda ash.Filtering available method in common carries out.The filtrate heating evaporation makes it be dried to the yellow soda ash that has crystal water, and is further dry under 180-250 ℃ temperature, makes industrial monohydrate (about carbonate content 99%).Drying mode can adopt general drying plant.
Method of the present invention can be handled and contain the saponification waste liquid that general formula is the RCOONa compound, particularly produces the saponification waste liquid that produces in the hexanolactam process.
The method technical process that utilizes saponification waste liquid to produce yellow soda ash provided by the present invention is short, equipment is simple, processing costs is low, can not only the very high high-quality yellow soda ash of production purity (its quality index is better than the specification of quality of country-level product industrial monohydrate by analysis, detected result is seen the table among the embodiment 1), and eliminated the pollution of saponification waste liquid effectively to environment, the waste water COD clearance that evaporates from saponification waste liquid reaches 96-98%.Therefore this method is to handle saponification waste liquid, reclaims the significant approach of useful matter.
The method of processing saponification waste liquid provided by the invention is equally applicable to handle the saponification waste liquid that forms with organic acid in other alkali in the Chemical Manufacture.
Embodiment 1
Get in the big enamelled vessel of producing 2.5 liters in 5 liters of saponification waste liquids that the hexanolactam workshop produces, heating evaporation is concentrated into water removal rate 70%, then the slag of gained is placed on putting on the pallet under the following 760 ℃ temperature of roasting kiln (being similar to retort furnace) blowing air normal pressure burning 30 minutes rough yellow soda ash 324 grams, at room temperature rough yellow soda ash being put into the beaker that 1.5 liters of tap water are housed dissolves, after treating fully dissolving, filter with the funnel that is added with filter paper, behind filtrate usefulness large beaker evaporate to dryness, with baking oven under the temperature about 200 ℃ dry 4 hours, get prepared calcium carbonate sodium 313 grams, the products obtained therefrom quality test is a following table:
The technical requirements of Interventions Requested unit
*Assay
Total alkali content (in yellow soda ash) % 〉=99.0 99.0
Muriate (in sodium-chlor) %≤0.8 0.62
Iron (in Indian red) %≤0.008 0.0014
Water-insoluble %≤0.10 0.028
Loss on ignition %≤0.50 0.30
* note: industrial monohydrate GB-210-80 technical requirements (first grade) is gone up the table data and is recorded by the unification of the motherland analysing and detecting method by Shanxi Province's product quality inspection.
Embodiment 2
Raw material and experimentation all are same as embodiment 1, and 700 ℃ of temperature of combustion get rough yellow soda ash 315 grams 50 minutes combustion times, get prepared calcium carbonate sodium 308.7 grams after dissolution filter, evaporate to dryness, drying.
Embodiment 3
Raw material and experimentation are with embodiment 1, and 780 ℃ of temperature of combustion get rough yellow soda ash 322 grams 30 minutes combustion times, get prepared calcium carbonate sodium 310 grams after dissolution filter, evaporate to dryness, drying.
Claims (3)
1, a kind of method of utilizing saponification waste liquid to produce yellow soda ash mainly contains the RCOONa compound in saponification waste liquid, and wherein R can be hydrogen, straight-chain paraffin, naphthenic hydrocarbon or aromatic hydrocarbon group, and its feature is as follows:
(a) the saponification waste liquid evaporation concentration that will contain above-claimed cpd gets slag, then,
(b) under 650-850 ℃, normal pressure, the blowing air burning got rough yellow soda ash (yellow soda ash contains 95%) in 20-60 minute,
(c) above-mentioned rough yellow soda ash is at room temperature used water dissolution, after filtration, filtrate evaporate to dryness, the dry prepared calcium carbonate sodium (carbonate content 99%) that gets.
2, according to claim 1, utilize saponification waste liquid to produce the method for yellow soda ash, it is characterized in that said preferred burn temperature is 730-770 ℃, 30-40 minute combustion time.
3, according to claim 1 and the 2 described methods of utilizing saponification waste liquid to produce yellow soda ash, the saponification waste liquid that it is characterized in that the said RCOONa of containing compound can be to produce the saponification waste liquid that produces in the hexanolactam process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN88100288A CN1010770B (en) | 1988-08-29 | 1988-08-29 | Preparation of soda using waste saponification liquor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN88100288A CN1010770B (en) | 1988-08-29 | 1988-08-29 | Preparation of soda using waste saponification liquor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1040772A true CN1040772A (en) | 1990-03-28 |
| CN1010770B CN1010770B (en) | 1990-12-12 |
Family
ID=4834148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN88100288A Expired CN1010770B (en) | 1988-08-29 | 1988-08-29 | Preparation of soda using waste saponification liquor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1010770B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1125863C (en) * | 1999-10-18 | 2003-10-29 | 中国石油化工股份有限公司巴陵分公司 | Method for evaporating, concentrating and drying saponified waste alkali liquor |
| CN104609626A (en) * | 2013-11-05 | 2015-05-13 | 中国石油化工股份有限公司大连石油化工研究院 | Liquid-state hydrocarbon waste alkali liquid treatment method |
| CN105645441A (en) * | 2016-04-13 | 2016-06-08 | 武汉科技大学 | Method for preparing soda ash and anhydrous sodium sulfate from cyclohexanone saponifying waste alkali solution |
-
1988
- 1988-08-29 CN CN88100288A patent/CN1010770B/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1125863C (en) * | 1999-10-18 | 2003-10-29 | 中国石油化工股份有限公司巴陵分公司 | Method for evaporating, concentrating and drying saponified waste alkali liquor |
| CN104609626A (en) * | 2013-11-05 | 2015-05-13 | 中国石油化工股份有限公司大连石油化工研究院 | Liquid-state hydrocarbon waste alkali liquid treatment method |
| CN104609626B (en) * | 2013-11-05 | 2016-08-17 | 中国石油化工股份有限公司大连石油化工研究院 | A kind of processing method of liquid hydrocarbon spent lye |
| CN105645441A (en) * | 2016-04-13 | 2016-06-08 | 武汉科技大学 | Method for preparing soda ash and anhydrous sodium sulfate from cyclohexanone saponifying waste alkali solution |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1010770B (en) | 1990-12-12 |
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