CN106748742A - A kind of method of utilization coke gas synthesising acid sodium - Google Patents
A kind of method of utilization coke gas synthesising acid sodium Download PDFInfo
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- CN106748742A CN106748742A CN201510826473.1A CN201510826473A CN106748742A CN 106748742 A CN106748742 A CN 106748742A CN 201510826473 A CN201510826473 A CN 201510826473A CN 106748742 A CN106748742 A CN 106748742A
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- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/10—Preparation of carboxylic acids or their salts, halides or anhydrides by reaction with carbon monoxide
Abstract
A kind of method of utilization coke gas synthesising acid sodium, air is blasted from gas generator bottom, and the gas of generation is in water scrubber by after washing；Gas is pumped into caustic wash tower from tower top by Water-ring vacuum, is fully contacted with the caustic soda adverse current sealed from alkali, and CO gas enter water-cooling tower from tower top；Gas enters gas-liquid separator, and the gas after water removal pressurizes into gas compression pump, and by entering in double-tube heat exchanger after water-oil separating, alkali lye is pumped into sleeve pipe from caustic soda basin metering, is sufficiently mixed with coal gas, and is heated in chuck with steam；Mixture after heating enters and is fully reacted with a temperature of in certain pressure in reaction tube, and entrainment of finished product sodium formate after cyclone hydraulic separators, gas is emptied reacted gas, and liquid enters sodium formate basin by flow by gravity.The present invention improves the product quality and purity of sodium formate, and ensure that the feature of environmental protection of production technology.
Description
Technical field
The invention belongs to chemical technology field, a kind of method of utilization coke gas synthesising acid sodium is specifically referred to.
Background technology
Sodium formate mainly has following production method：
Carbon monoxide synthetic method, preparation method：Carbon monoxide and sodium hydroxide solution react generation sodium formate under 160 ~ 200 DEG C and 2MPa pressure, then get product formic acid through sulfuric acid solution, distillation.Brief description of the process is as follows：This engineering is raw material using coke, through gas making dedusting, washing, again decarburization, the technique such as dedusting, CO gas needed for obtaining technique, then heated pressurization generate sodium formate solution with NaOH reaction, by evaporation, separation, dries generation solid product sodium formate.Each post is described as follows：1st, coke electric block is promoted to Gas-making Furnace top, is added in coke to stove from Gas-making Furnace fire door, coke draws in stove with blower fan（Send）The air burn incompletely for entering produces the mixed gas such as carbon monoxide, carbon dioxide, nitrogen.2nd, from Gas-making Furnace come mixed gas into cyclone dust collectors go out mixed gas entrainment most of solid granule, enter aeration tower afterwards, aeration tower is with water as cleaning solution, further remove the solid particle in mixed gas, caustic wash tower is entered back into sodium hydroxide solution as circulating absorption solution, partial CO 2 gas in removing mixed gas, the moisture for separating gas entrainment through cyclone hydraulic separators again enters electrostatic precipitator, remaining solid granule is removed by electrostatic, mixed gas are purified again.3rd, the mixed gas after purifying carry out two sections of compressions into compressor, pressure-raising is to 2.0 ~ 2.2Mpa, enter blender through oil water separator, mix with the alkali lye come from preheater, under uniform temperature and pressure, alkali lye and most of carbon dioxide gas precursor reactant, eliminate carbon dioxide, the CO gas needed for obtaining technique substantially.4th, the CO gas and nitrogen for coming from a upper operation are heated to 140 ~ 150 degree and enter synthesis reactor, carbon monoxide and NaOH reaction generation sodium formate solution in synthesis reactor, sodium formate solution and the mixture such as nitrogen and micro CO gas carry out gas-liquid separation after release through entering cyclone hydraulic separators, sodium formate solution pump squeezes into that storage tank is stand-by, and mixed gas enter air.5th, the sodium formate solution in storage tank is with being pumped into evaporator, with oil oven come heat-conducting oil heating, evaporate most of moisture, form the sodium formate solution of content 70 ~ 80%, afterwards with being pumped into centrifuge, centrifuge is dry obtain 5% or so sodium formate.6th, the sodium formate solution hot blast after being centrifuged blows to hot-air drier drying, obtains qualified sodium formate product, is packed.
Sodium formate, slightly chemical formula HCOONa2H2O, formic acid smell.Soluble in water and glycerine, is slightly soluble in ethanol.253 DEG C of fusing point（Anhydride）, it is poisonous.Hydrogen and sodium oxalate are decomposed into during heat-flash.As leather industry, the camouflage acid in chromium tanning for catalyst and stablizes synthetics, the reducing agent of dyeing, for producing sodium hydrosulfite, oxalic acid and formic acid.It is white or pale yellow crystals solid, slightly hygroscopy under normal temperature.It is micro- to have formic acid smell.There is hygroscopicity.Sodium oxalate and hydrogen are resolved into during high temperature, sodium carbonate is then generated.It is dissolved in about 1.3 parts of water.Glycerine is dissolved in, ethanol, octanol is slightly soluble in, insoluble in ether.Its aqueous solution is in alkalescence.Relative density 1.92.253 DEG C of fusing point.It is irritant.Commodity often contain 2 molecular crystalline water.As leather industry,
Camouflage acid in chromium tanning, for catalyst and stablizing synthetics, the reducing agent of dyeing, for producing sodium hydrosulfite, oxalic acid and formic acid.Precipitate precious metals.The complex ion of trivalent metal can be formed in the solution.There is cushioning effect, the pH value of strong acid can be corrected.For phthalic resin coating, plasticizer, high explosives, acid resisting material, aeroengine oil, adhesive additive.
Now, it is necessary to use CO gas during production sodium formate, CO gas can be produced using coke gas, but, produce the impurity such as substantial amounts of carbon dioxide, hydrogen sulfide gas simultaneously in coke gas, environment is not only polluted, and causes the waste of resource.
Therefore, necessary a kind of method of utilization coke gas synthesising acid sodium of design.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of method of utilization coke gas synthesising acid sodium.
Present disclosure includes:
A kind of method of utilization coke gas synthesising acid sodium, comprises the following steps：
（1）Air is blasted from gas generator bottom, helps coke to be burnt in stove gas making, the gas of generation is in water scrubber by after washing, sewage is entered in circulating water pool by bottom of towe；
（2）Gas is pumped into caustic wash tower from tower top by Water-ring vacuum, it is fully contacted with the caustic soda adverse current sealed from alkali, carbon dioxide, hydrogen sulfide, the carbonyl sulfide impurity in gas are fully absorbed, CO gas enter water-cooling tower from tower top, it is therefore an objective to remove the alkali lye of gas entrainment and lower the temperature；
（3）Gas enters gas-liquid separator, and water enters water seal from bottom, is then return to circulating water pool, and the gas after water removal pressurizes into gas compression pump, by entering in double-tube heat exchanger after water-oil separating,
Alkali lye is pumped into sleeve pipe from caustic soda basin metering, is sufficiently mixed with coal gas, and is heated in chuck with steam；
（4）Mixture after heating enters and is fully reacted with a temperature of in certain pressure in reaction tube, and entrainment of finished product sodium formate after cyclone hydraulic separators, gas is emptied reacted gas, and liquid enters sodium formate basin by flow by gravity.
In the present invention, as a kind of perferred technical scheme, step（1）In, mode of washing uses countercurrent washing twice.
In the present invention, as a kind of perferred technical scheme, step（2）In, gas is by three-level alkali liquid washing.
In the present invention, as a kind of perferred technical scheme, step（2）In, stored for future use in the sodium carbonate return byproduct tank for washing generation.
In the present invention, as a kind of perferred technical scheme, step（3）In, temperature is heated to for 75-85 DEG C.
In the present invention, as a kind of perferred technical scheme, step（4）In, pressure is 2-2.5MPa in reaction tube, and temperature is 145-149 DEG C.
The beneficial effects of the invention are as follows,
The present invention blasts air from gas generator bottom, helps coke to be burnt in stove gas making, and the gas of generation is in water scrubber by after washing, sewage is entered in circulating water pool by bottom of towe；Gas is pumped into caustic wash tower from tower top by Water-ring vacuum, it is fully contacted with the caustic soda adverse current sealed from alkali, carbon dioxide, hydrogen sulfide, the carbonyl sulfide impurity in gas are fully absorbed, CO gas enter water-cooling tower from tower top, it is therefore an objective to remove the alkali lye of gas entrainment and lower the temperature；Gas enters gas-liquid separator, and water enters water seal from bottom, is then return to circulating water pool, and the gas after water removal pressurizes into gas compression pump, by entering in double-tube heat exchanger after water-oil separating,
Alkali lye is pumped into sleeve pipe from caustic soda basin metering, is sufficiently mixed with coal gas, and is heated in chuck with steam；Mixture after heating enters and is fully reacted with a temperature of in certain pressure in reaction tube, and entrainment of finished product sodium formate after cyclone hydraulic separators, gas is emptied reacted gas, and liquid enters sodium formate basin by flow by gravity.Based on process above step, the present invention can fully remove the impurity such as the carbon dioxide, the hydrogen sulfide gas that are produced simultaneously in coke gas, improve the product quality and purity of sodium formate, and ensure that the feature of environmental protection of production technology.
Specific embodiment
In order that technological means, creation characteristic, reached purpose and effect that the present invention is realized are easy to understand, with reference to specific embodiment, the present invention is expanded on further.
Embodiment 1
A kind of method of utilization coke gas synthesising acid sodium, comprises the following steps：
（1）Air is blasted from gas generator bottom, helps coke to be burnt in stove gas making, by after washing, mode of washing uses countercurrent washing twice in water scrubber, sewage is entered in circulating water pool the gas of generation by bottom of towe；
（2）Gas is pumped into caustic wash tower from tower top by Water-ring vacuum, it is fully contacted with the caustic soda adverse current sealed from alkali, gas is by three-level alkali liquid washing, fully absorb carbon dioxide, hydrogen sulfide, the carbonyl sulfide impurity in gas, stored for future use in the sodium carbonate return byproduct tank for washing generation, CO gas enter water-cooling tower from tower top, it is therefore an objective to remove the alkali lye of gas entrainment and lower the temperature；
（3）Gas enters gas-liquid separator, and water enters water seal from bottom, is then return to circulating water pool, and the gas after water removal pressurizes into gas compression pump, by entering in double-tube heat exchanger after water-oil separating,
Alkali lye is pumped into sleeve pipe from caustic soda basin metering, is sufficiently mixed with coal gas, and is heated in chuck with steam, is heated to temperature for 75 DEG C；
（4）Mixture after heating enters and is fully reacted with a temperature of in certain pressure in reaction tube, pressure is 2MPa in reaction tube, and temperature is 145 DEG C, and reacted gas is entrainment of finished product sodium formate after cyclone hydraulic separators, gas is emptied, and liquid enters sodium formate basin by flow by gravity.
Embodiment 2
A kind of method of utilization coke gas synthesising acid sodium, comprises the following steps：
（1）Air is blasted from gas generator bottom, helps coke to be burnt in stove gas making, by after washing, mode of washing uses countercurrent washing twice in water scrubber, sewage is entered in circulating water pool the gas of generation by bottom of towe；
（2）Gas is pumped into caustic wash tower from tower top by Water-ring vacuum, it is fully contacted with the caustic soda adverse current sealed from alkali, gas is by three-level alkali liquid washing, fully absorb carbon dioxide, hydrogen sulfide, the carbonyl sulfide impurity in gas, stored for future use in the sodium carbonate return byproduct tank for washing generation, CO gas enter water-cooling tower from tower top, it is therefore an objective to remove the alkali lye of gas entrainment and lower the temperature；
（3）Gas enters gas-liquid separator, and water enters water seal from bottom, is then return to circulating water pool, and the gas after water removal pressurizes into gas compression pump, by entering in double-tube heat exchanger after water-oil separating,
Alkali lye is pumped into sleeve pipe from caustic soda basin metering, is sufficiently mixed with coal gas, and is heated in chuck with steam, is heated to temperature for 85 DEG C；
（4）Mixture after heating enters and is fully reacted with a temperature of in certain pressure in reaction tube, pressure is 2.5MPa in reaction tube, and temperature is 149 DEG C, and reacted gas is entrainment of finished product sodium formate after cyclone hydraulic separators, gas is emptied, and liquid enters sodium formate basin by flow by gravity.
Embodiment 3
A kind of method of utilization coke gas synthesising acid sodium, comprises the following steps：
（1）Air is blasted from gas generator bottom, helps coke to be burnt in stove gas making, by after washing, mode of washing uses countercurrent washing twice in water scrubber, sewage is entered in circulating water pool the gas of generation by bottom of towe；
（2）Gas is pumped into caustic wash tower from tower top by Water-ring vacuum, it is fully contacted with the caustic soda adverse current sealed from alkali, gas is by three-level alkali liquid washing, fully absorb carbon dioxide, hydrogen sulfide, the carbonyl sulfide impurity in gas, stored for future use in the sodium carbonate return byproduct tank for washing generation, CO gas enter water-cooling tower from tower top, it is therefore an objective to remove the alkali lye of gas entrainment and lower the temperature；
（3）Gas enters gas-liquid separator, and water enters water seal from bottom, is then return to circulating water pool, and the gas after water removal pressurizes into gas compression pump, by entering in double-tube heat exchanger after water-oil separating,
Alkali lye is pumped into sleeve pipe from caustic soda basin metering, is sufficiently mixed with coal gas, and is heated in chuck with steam, is heated to temperature for 80 DEG C；
（4）Mixture after heating enters and is fully reacted with a temperature of in certain pressure in reaction tube, pressure is 2.3MPa in reaction tube, and temperature is 147 DEG C, and reacted gas is entrainment of finished product sodium formate after cyclone hydraulic separators, gas is emptied, and liquid enters sodium formate basin by flow by gravity.
The properties of product of embodiment 1-3 such as following table：
| Project | Formic acid sodium content | Carbonate content |
| Embodiment 1 | 98.1 | 0.8 |
| Embodiment 2 | 98.0 | 0.7 |
| Embodiment 3 | 98.7 | 0.5 |
Those of ordinary skill in the art should be understood：The discussion of any of the above embodiment is exemplary only, it is not intended that imply that the scope of the present disclosure (including claim) is limited to these examples；Under thinking of the invention, can also be combined between technical characteristic in above example or different embodiments, step can be realized with random order, and there are many other changes of different aspect of the invention as described above, and for simplicity, they are provided not in details.Therefore, all any omission, modification, equivalent, improvement within the spirit and principles in the present invention, made etc., should be included within the scope of the present invention.
Claims (6)
1. a kind of method of utilization coke gas synthesising acid sodium, it is characterized in that, comprise the following steps：
（1）Air is blasted from gas generator bottom, helps coke to be burnt in stove gas making, the gas of generation is in water scrubber by after washing, sewage is entered in circulating water pool by bottom of towe；
（2）Gas is pumped into caustic wash tower from tower top by Water-ring vacuum, it is fully contacted with the caustic soda adverse current sealed from alkali, carbon dioxide, hydrogen sulfide, the carbonyl sulfide impurity in gas are fully absorbed, CO gas enter water-cooling tower from tower top, it is therefore an objective to remove the alkali lye of gas entrainment and lower the temperature；
（3）Gas enters gas-liquid separator, and water enters water seal from bottom, is then return to circulating water pool, and the gas after water removal pressurizes into gas compression pump, by entering in double-tube heat exchanger after water-oil separating,
Alkali lye is pumped into sleeve pipe from caustic soda basin metering, is sufficiently mixed with coal gas, and is heated in chuck with steam；
（4）Mixture after heating enters and is fully reacted with a temperature of in certain pressure in reaction tube, and entrainment of finished product sodium formate after cyclone hydraulic separators, gas is emptied reacted gas, and liquid enters sodium formate basin by flow by gravity.
2. a kind of method of utilization coke gas synthesising acid sodium as claimed in claim 1, it is characterized in that,
Step（1）In, mode of washing uses countercurrent washing twice.
3. a kind of method of utilization coke gas synthesising acid sodium as claimed in claim 1, it is characterized in that, step（2）In, gas is by three-level alkali liquid washing.
4. a kind of method of utilization coke gas synthesising acid sodium as claimed in claim 1, it is characterized in that, step（2）In, stored for future use in the sodium carbonate return byproduct tank for washing generation.
5. a kind of method of utilization coke gas synthesising acid sodium as claimed in claim 1, it is characterized in that, step（3）In, temperature is heated to for 75-85 DEG C.
6. a kind of method of utilization coke gas synthesising acid sodium as claimed in claim 1, it is characterized in that,
Step（4）In, pressure is 2-2.5MPa in reaction tube, and temperature is 145-149 DEG C.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1273962A (en) * | 2000-03-31 | 2000-11-22 | 杨显云 | Process for synthesizing potassium formate |
| CN103523781A (en) * | 2013-10-22 | 2014-01-22 | 沙隆达集团公司 | High-purity CO preparation method |
| CN104193611A (en) * | 2014-08-08 | 2014-12-10 | 烟台金海化工有限公司 | Co-production preparation method of sodium formate and methanol |
| CN105080286A (en) * | 2015-08-11 | 2015-11-25 | 无锡桥阳机械制造有限公司 | Method for removing mercury in mercury-contained tail gas |
-
2015
- 2015-11-25 CN CN201510826473.1A patent/CN106748742A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1273962A (en) * | 2000-03-31 | 2000-11-22 | 杨显云 | Process for synthesizing potassium formate |
| CN103523781A (en) * | 2013-10-22 | 2014-01-22 | 沙隆达集团公司 | High-purity CO preparation method |
| CN104193611A (en) * | 2014-08-08 | 2014-12-10 | 烟台金海化工有限公司 | Co-production preparation method of sodium formate and methanol |
| CN105080286A (en) * | 2015-08-11 | 2015-11-25 | 无锡桥阳机械制造有限公司 | Method for removing mercury in mercury-contained tail gas |
Non-Patent Citations (1)
| Title |
|---|
| 朱世勇主编: "《环境与工业气体净化技术》", 30 May 2001 * |
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Application publication date: 20170531 |