CN1456546A - Method for preparing potassium formate and sodium formate from carbide furnace tail gas as raw material - Google Patents
Method for preparing potassium formate and sodium formate from carbide furnace tail gas as raw material Download PDFInfo
- Publication number
- CN1456546A CN1456546A CN 03120711 CN03120711A CN1456546A CN 1456546 A CN1456546 A CN 1456546A CN 03120711 CN03120711 CN 03120711 CN 03120711 A CN03120711 A CN 03120711A CN 1456546 A CN1456546 A CN 1456546A
- Authority
- CN
- China
- Prior art keywords
- calcium carbide
- stove exhaust
- carbide stove
- formiate
- potassium formiate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
A process for preparing potassium (or sodium) formate from the tail gas of calcium carbide furnace includes such steps as cooling, removing dust, purifying, compressing, alkali absorbing and drying.
Description
Technical field
The present invention relates to a kind of production technique of formate, particularly a kind of method of utilizing calcium carbide stove exhaust to prepare potassium formiate, sodium.
Background technology
Potassium formiate is widely used in the oil production industry as a kind of important compound, when being used as the drilling fluid of oil production, it can realize high-density, and keeps low viscosity, improves drilling speed, prolonging drilling life of bit, is a kind of type material of technical field of petroleum extraction.Potassium formiate also can be used as the raw material of preparation oxalic acid and important chemical products such as formic acid and methane amide, also can be used as fodder additives, and market outlook are very wide.Sodium formiate is as basic chemical raw materials, mainly as the well control fluid of basic chemical raw materials such as vat powder, formic acid and petroleum industry etc., has market outlook preferably.
At present, the preparation formate has two kinds of methods usually, and a kind of is to adopt acid-base reaction to produce chemical reagent type formate, this method Costco Wholesale costliness; Another kind is to make formate with vitriol and formic acid reaction, this complex process, and production cost is also higher.Japanese documentation JP7714716 " Alkali Metal Formates " discloses and has a kind ofly produced potassium formiate and sodium formiate with basic metal and carbonate and carbonic acid gas and H-H reaction, and the formate product concentration that this technology makes is low, no practical value.Other has Chinese patent 00112814.0 to disclose to use potassium hydroxide solution and the purity method greater than 90% CO (carbon monoxide converter) gas prepared in reaction potassium formiate.Because this method is to the requirement height of carbon monoxide purity, the technology of preparation high-purity carbon monooxide is also comparatively complicated.
Calcium carbide factory can produce a large amount of carbon monoxide when producing calcium carbide, but the concentration of this carbon monoxide is not high, generally can not directly recycle, but discharging can cause serious pollution.
Summary of the invention
The object of the present invention is to provide a kind of is the method for feedstock production potassium formiate with calcium carbide factory's calcium carbide stove exhaust, it not only can realize the recycling of calcium carbide stove exhaust, reduce the pollution of calcium carbide stove exhaust, can also produce simultaneously and be worth higher Chemicals potassium formiate environment.
The present invention is to be the method for feedstock production potassium formiate with the calcium carbide stove exhaust, may further comprise the steps:
(a): calcium carbide stove exhaust cooling dedusting: the furnace of calcium carbide discharge tail gas is through the water wash column dedusting of lowering the temperature;
(b): calcium carbide stove exhaust purifies: the calcium carbide stove exhaust after step (a) cooling dedusting enters the scavenging tower that scavenging agent is housed and removes sour gas and micro-dust such as hydrogen sulfide, carbonic acid gas;
(c): compress supercharging: the calcium carbide stove exhaust after will purifying with compressor is forced into reaction pressure;
(d): absorb: calcium carbide stove exhaust is at the pressure of 1.2～2.4Mpa, under 120-220 degree centigrade the condition, absorbs through the circulation step by step of a plurality of tandem reactors, generates the solution that contains potassium formiate with 15～50% potassium hydroxide solution effect;
(e): dry packing: potassium formiate solution is packaged to be the product potassium formiate after dehydrating.
In the above-mentioned step (a), after the cooling dedusting in the tail gas content requirement of dirt less than 10mg/Nm
3
Be that sour gas such as the hydrogen sulfide in the calcium carbide stove exhaust, carbonic acid gas and dust are removed in the above-mentioned steps (c), and do not require the concentration of carbon monoxide.
The temperature that this potassium hydroxide solution that uses in the above-mentioned absorption process enters reactor is 120～200 degrees centigrade.
The number of the absorption reactor thermally in the above-mentioned steps (d) can be 4～12, and circulation absorbs step by step.
The inventive method fully is absorbed the CO (carbon monoxide converter) gas in the calcium carbide stove exhaust, and is converted into potassium formiate by the method for the absorption reaction that circulates step by step.Not only solve the pollution problem that calcium carbide stove exhaust produces, also obtained being worth higher industrial chemicals potassium formiate.
Description of drawings
Fig. 1 is a process flow sheet of the present invention.
Embodiment
As shown in Figure 1, calcium carbide stove exhaust enters washing tower 1 from the bottom under the effect of blower fan, washing water are introduced at the top of washing tower 1 simultaneously, at washing tower 1 washed water and calcium carbide stove exhaust mobilization in opposite directions, make the ash fall in the calcium carbide stove exhaust remove simultaneously all right absorption portion soluble gas to the bottom of tower.
Then the bottom that tail gas is introduced scavenging tower 3 by blower fan 2 after the dedusting that will draw from cat head enters scavenging tower, ALGA-B01 type sorbent material is housed in scavenging tower 3, sour gas and micro-dust such as this sorbent material can absorbing and removing hydrogen sulfide, carbonic acid gas, further purifying calcium carbide furnace tail gas, reduce the generation of by product, improve the purity of potassium formiate.
The compression of the compressed machine 4 of calcium carbide stove exhaust through purifying, the pressure that makes tail gas is between 1.2～2.4Mpa, and temperature is introduced in placed in-line 5 reactors 7 between 120-220 degree centigrade, and absorption step by step circulates.Absorption liquid adopts 15%～50% potassium hydroxide solution, and the temperature of this potassium hydroxide solution is controlled between 120～220 degrees centigrade, to guarantee the absorption reaction temperature.Potassium hydroxide solution is stored in the storage tanks 5, and heats by well heater 6.
As shown in Figure 1, calcium carbide stove exhaust and potassium hydroxide solution all enter from the top of reactor, are provided with by-pass valve control between each reactor.Wherein valve V11, V21, V31, V41, V51 control calcium carbide stove exhaust respectively and enter different reactor R1, R2, R3, R4, R5; Valve V12, V22, V32, V42, V52 control potassium hydroxide solution respectively and enter reactor R1, R2, R3, R4, R5.Each reactor also is respectively equipped with reacted tail gas discharge valve V14, V24, V34, V44, V54, is respectively applied for the reacted calcium carbide stove exhaust of discharging.Also be provided with valve V13, V23, V33, V43 on the pipeline between each reactor simultaneously, to control method and the step that circulation step by step absorbs.Valve V15, the V25 that is connected with each reactor, V35, V45, V55 control drawing of reaction liquid respectively.
The working order of present embodiment is as follows: open valve V11, V13, V23, V33, V44, other valve closes, calcium carbide stove exhaust after the purification enters the first reactor R1 of potassium formiate concentration maximum, tail gas after first reactor R1 absorbs enters the potassium formiate concentration second reactor R2 that takes second place, by that analogy, by reaction R3, until entering reactor R4, the reacted tail gas of this moment is discharged through V44.And reactor R5 installs potassium hydroxide as recycle next time.After question response device R1 absorbs and finishes, valve-off V11, V13, cut off the source of the gas of reactor R1, opening valve V15 emits the potassium formiate solution among the reactor R1 and carries out spraying drying, open valve V12 again and pack the potassium hydroxide solution for preparing into reactor as circulation time usefulness next time, finish one and absorb circulation.Open valve V21, make calcium carbide stove exhaust switch to reactor R2, then valve-off V44 opens valve V43, V54, makes the absorption circulation of calcium carbide stove exhaust through reactor R2, R3, R4, R5.Emit potassium formiate solution among the reactor R2 again.The absorption circulation of carrying out successively is R3, R4, R5, R1 circulation, R4, R5, R1, R2 circulation, R5, R1, R2, R3 circulation.Through circulation absorption step by step, improved the assimilated efficiency of calcium carbide stove exhaust greatly.
Because the solubleness of potassium formiate in water is bigger, as 90 degrees centigrade the time, the solubleness of potassium formiate in water is 657 grams/100 gram water.Therefore the present invention adopts spray-dired method to produce the solid potassium formiate.
Certainly, the method for above-mentioned production potassium formiate can be used for producing sodium formiate fully.
Method of the present invention has solved calcium carbide factory's calcium carbide stove exhaust emission problem, has eliminated the pollution of calcium carbide stove exhaust discharging to environment, has obvious social; The potassium formiate that utilizes calcium carbide stove exhaust production is a kind of costly important chemical product, brings bigger economic benefit to enterprise; The potassium formiate product purity height that the inventive method is produced can be produced the product of 90-99% as required.Because adopting waste gas is raw material, so production cost is low, product has the very strong power of striving unexpectedly on market.Content to carbon monoxide in the unstripped gas of producing potassium formiate does not have any requirement, has avoided obtaining the high-concentration carbon monoxide unstripped gas and increases the problem that investment that thickening equipment brings increases.
Claims (8)
1. one kind is the method for feedstock production potassium formiate with the calcium carbide stove exhaust, it is characterized in that may further comprise the steps:
(a): calcium carbide stove exhaust cooling dedusting: the furnace of calcium carbide discharge tail gas is through the water wash column dedusting of lowering the temperature;
(b): calcium carbide stove exhaust purifies: the calcium carbide stove exhaust after step (a) cooling dedusting enters and scavenging tower is housed removes sour gas and micro-dust such as hydrogen sulfide, carbonic acid gas;
(c): compress supercharging: the calcium carbide stove exhaust after will purifying with compressor is forced into reaction pressure;
(d): absorb: calcium carbide stove exhaust is at the pressure of 1.2～2.4Mpa, under 120-220 degree centigrade the condition, absorbs through the circulation step by step of a plurality of tandem reactors, generates the solution that contains potassium formiate with 15～50% potassium hydroxide solution effect;
(e): dry packing: potassium formiate solution is packaged to be the product potassium formiate after dehydrating.
2. according to claim 1 is the method for feedstock production potassium formiate with the calcium carbide stove exhaust, it is characterized in that: in the described step (a), after the cooling dedusting in the tail gas content of dirt less than 10mg/Nm
3
3. according to claim 1 is the method for feedstock production potassium formiate with the calcium carbide stove exhaust, it is characterized in that: be that sour gas such as the hydrogen sulfide in the calcium carbide stove exhaust, carbonic acid gas and dust are removed in the described step (c).
4. according to claim 1 is the method for feedstock production potassium formiate with the calcium carbide stove exhaust, it is characterized in that: the temperature that this potassium hydroxide solution enters reactor is 120～220 degrees centigrade.
5. according to claim 1 is feedstock production potassium formiate method with the calcium carbide stove exhaust, it is characterized in that: the number of absorption reactor thermally is 4～12 in the step (d), and circulation absorbs step by step.
6. according to claim 1 is feedstock production potassium formiate method with the calcium carbide stove exhaust, it is characterized in that: the dehydrating and drying method of potassium formiate is a spray-drying process in the step (e).
7. according to claim 1 is feedstock production potassium formiate method with the calcium carbide stove exhaust, it is characterized in that: the sorbent material in the scavenging tower is an ALGA-B01 type sorbent material.
8. one kind is the method for feedstock production sodium formiate with the calcium carbide stove exhaust, it is characterized in that may further comprise the steps:
(a): calcium carbide stove exhaust cooling dedusting: the furnace of calcium carbide discharge tail gas is through the water wash column dedusting of lowering the temperature;
(b): calcium carbide stove exhaust purifies: the calcium carbide stove exhaust after step (a) cooling dedusting enters the scavenging tower that scavenging agent is housed and removes sour gas and micro-dust such as hydrogen sulfide, carbonic acid gas;
(c): compress supercharging: the calcium carbide stove exhaust after will purifying with compressor is forced into reaction pressure;
(d): absorb: calcium carbide stove exhaust is at the pressure of 1.2～2.4Mpa, under 120-220 degree centigrade the condition, absorbs through the circulation step by step of a plurality of tandem reactors, generates the solution that contains sodium formiate with 15～50% sodium hydroxide solution effect;
(e): dry packing: sodium formate solution is packaged to be the product sodium formiate after dehydrating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03120711 CN1456546A (en) | 2003-03-18 | 2003-03-18 | Method for preparing potassium formate and sodium formate from carbide furnace tail gas as raw material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03120711 CN1456546A (en) | 2003-03-18 | 2003-03-18 | Method for preparing potassium formate and sodium formate from carbide furnace tail gas as raw material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1456546A true CN1456546A (en) | 2003-11-19 |
Family
ID=29411560
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03120711 Pending CN1456546A (en) | 2003-03-18 | 2003-03-18 | Method for preparing potassium formate and sodium formate from carbide furnace tail gas as raw material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1456546A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100427391C (en) * | 2006-09-30 | 2008-10-22 | 宁夏英力特电力集团股份有限公司 | Tail gas treatment and reutilization for calcium carbide stove |
| CN101638359B (en) * | 2009-09-04 | 2011-12-21 | 傅永茂 | Technology for producing oxalic acid by using tail gas of calcium carbide furnace |
| CN104016849A (en) * | 2013-02-28 | 2014-09-03 | 黄冈师范学院 | Co-production process for formic acid and monopotassium phosphate |
| CN106748744A (en) * | 2015-11-25 | 2017-05-31 | 衡阳屹顺化工有限公司 | A kind of method that sodium formate is produced with calcium carbide stove exhaust |
-
2003
- 2003-03-18 CN CN 03120711 patent/CN1456546A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100427391C (en) * | 2006-09-30 | 2008-10-22 | 宁夏英力特电力集团股份有限公司 | Tail gas treatment and reutilization for calcium carbide stove |
| CN101638359B (en) * | 2009-09-04 | 2011-12-21 | 傅永茂 | Technology for producing oxalic acid by using tail gas of calcium carbide furnace |
| CN104016849A (en) * | 2013-02-28 | 2014-09-03 | 黄冈师范学院 | Co-production process for formic acid and monopotassium phosphate |
| CN106748744A (en) * | 2015-11-25 | 2017-05-31 | 衡阳屹顺化工有限公司 | A kind of method that sodium formate is produced with calcium carbide stove exhaust |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Hanif et al. | Sulfur dioxide removal: An overview of regenerative flue gas desulfurization and factors affecting desulfurization capacity and sorbent regeneration | |
| CN102151476B (en) | Method for removing hydrogen sulfide in gas phase through oxidization under high gravity field | |
| CN101422691B (en) | Multi-pollutant removing technique and device of fuel coal smoke | |
| CN102489149B (en) | Flue-gas purification handling method | |
| CN112387071A (en) | CO2Trapping method and apparatus | |
| CN210385425U (en) | Flue gas desulfurization device | |
| CN103203242B (en) | Catalytic system and process for desulfuration of industrial sulfur-bearing waste gas | |
| CN104857838A (en) | System and method for flue gas desulfurization through bipolar membrane electrodialysis | |
| CN1891330A (en) | Method for removing sulfur dioxide from wastegas for making it be a product by circulation of magnesium oxide | |
| CN105536886A (en) | Regeneration method of arsenic poisoning denitration catalyst | |
| CN103028313B (en) | Integrated desulfuration and denitration method for wet oxidation of flue gas | |
| CN103028324B (en) | Method for desulfurization of flue gas in boiler by using red mud | |
| WO2011016906A2 (en) | Process for simultaneous removal of carbon dioxide and sulfur oxides from flue gas | |
| CN1883766A (en) | Process for absorption of sulfur dioxide waste gas by Bayer red mud | |
| CN101318099A (en) | Process for removing organic sulfur in low-temperature condition | |
| CN102210968A (en) | Method for desulfurizing hydrogen sulfide-containing mixed gas | |
| CN105032173A (en) | Device and process of ammonia-soda-process combined desulfurization and denitrification | |
| CN1456546A (en) | Method for preparing potassium formate and sodium formate from carbide furnace tail gas as raw material | |
| CN1872667A (en) | Method for preparing vitriol from flue gas | |
| CN103432879A (en) | Method for desulfurization and denitrification of complexing ferroporphyrin smoke based on supergravity | |
| CN108671747A (en) | A kind of method and system discharging recycling purification helium in exhaust gas from preform sintering furnace | |
| CN102233224A (en) | Method for recovering CO2 from flue gas in cement rotary kiln | |
| CN1092994C (en) | Gas decarbonization, desulfuration and decyanation technology by Fe-alkalisolution catalyst method | |
| CN2870958Y (en) | Purifier of waste gas containing high-content nitrogen oxygen waste gas | |
| CN203556284U (en) | Flue gas cleaning, recycling and reusing system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |