CN107488458A - A kind of method that crude benzol in coke-stove gas is reclaimed using tar washing oil - Google Patents
A kind of method that crude benzol in coke-stove gas is reclaimed using tar washing oil Download PDFInfo
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- CN107488458A CN107488458A CN201710625805.9A CN201710625805A CN107488458A CN 107488458 A CN107488458 A CN 107488458A CN 201710625805 A CN201710625805 A CN 201710625805A CN 107488458 A CN107488458 A CN 107488458A
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- washing oil
- coke
- tar washing
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G5/00—Recovery of liquid hydrocarbon mixtures from gases, e.g. natural gas
- C10G5/04—Recovery of liquid hydrocarbon mixtures from gases, e.g. natural gas with liquid absorbents
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/08—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors
- C10K1/16—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors with non-aqueous liquids
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- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Industrial Gases (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The present invention relates to coal chemical technology, specifically discloses a kind of method that crude benzol in coke-stove gas is reclaimed using tar washing oil, comprises the following steps：The β methyl naphthalenes of crude tar washing oil quality 5%~6% are added into crude tar washing oil, obtain being modified tar washing oil；The coke-stove gas that temperature is 5~15 DEG C is passed through, the coke-stove gas is washed using the modified tar washing oil, collects and washes benzene rich oil after absorbing crude benzol；The benzene rich oil of washing is subjected to de- benzene processing, collects crude benzol.Method provided by the present invention, have and realize that low temperature washes benzene process, improve crude benzol recovery rate, increase the yield of crude benzol, the characteristics of increasing economic efficiency.
Description
Technical field
The invention belongs to coal chemical technology, and in particular to a kind of side that crude benzol in coke-stove gas is reclaimed using tar washing oil
Method.
Background technology
The method that each coke-oven plant of China reclaims benzene hydrocarbon from coke-stove gas at present has：Washing oil absorption process, absorption method, depth
Condensation method.Coking industry mainly uses washing oil absorption process at present.Washing oil absorption process according to operating pressure be divided into pressurizing absorption method, often
Press absorption process and negative pressure absorbing method.The a little higher than atmospheric pressure of operating pressure of ordinary-pressure absorption method, is the method that various countries generally use.
At this stage, benzene hydrocarbon in coke-stove gas is absorbed（Crude benzol）Washing oil mainly have two kinds：One is tar washing oil, secondly
It is oil washing oil（Light diesel fuel cut）.Washing oil should have an ability of good absorption crude benzol, larger absorptive capacity, relatively small
Relative molecular mass, on solution reduce benzene vapour pressure, increase absorption driving force.The washing oil that coke-oven plant is used to wash benzene is main
There is tar washing oil.Tar washing oil is 230~300 DEG C in high temperature coal-tar of cut, the convenient sources compared with oil washing oil, price
Cheaply, used by most of coke-oven plants.
Research of the China in terms of focusing oil wash oil crystallization and its elimination comparative maturity, but in low temperature and ensure crude benzol matter
On the premise of amount, normal operating can not be realized at a lower temperature by commonly using tar washing oil at this stage, low temperature can be supported to wash at this stage
Benzene operation tar washing oil remain unchanged exist technical bottleneck, especially tar washing oil nodeless mesh and can normal circulation tar washing oil still
Treat further to study.
The content of the invention
Can not realize normal operating at a lower temperature for commonly using tar washing oil in the prior art, crude benzol recovery rate compared with
It is low, a kind of the problem of business efficiency is low, there is provided method that crude benzol in coke-stove gas is reclaimed using tar washing oil.
In order to solve the above technical problems, the technical solution used in the present invention is：
A kind of method that crude benzol in coke-stove gas is reclaimed using tar washing oil, including at least following steps：
（1）The beta-methylnaphthalene of crude tar washing oil quality 5%~6% is added into crude tar washing oil, obtains being modified tar washing oil；
（2）The coke-stove gas that temperature is 5~15 DEG C is passed through, the coke-stove gas is washed using the modified tar washing oil, collected
Absorb and wash benzene rich oil after crude benzol；
（3）The benzene rich oil of washing is subjected to de- benzene processing, collects crude benzol.
It is using beneficial effect caused by above-mentioned technical proposal：One kind of the invention utilizes tar washing oil recovery coke-oven coal
It the method for crude benzol in gas, can realize that low temperature washes benzene process, make content of the crude benzol in tar washing oil higher, the coke oven after washing
The benzene content of coal gas is lower, and crude benzol recovery rate is improved to 97%~98.5%, and the raising of crude benzol recovery rate directly increases the production of crude benzol
Amount, improves economic benefit.
Brief description of the drawings
Fig. 1 is that tar washing oil crystalline temperature variation relation figure after beta-methylnaphthalene is added in the embodiment of the present invention.
Embodiment
The present invention is further detailed explanation with specific embodiment below in conjunction with the accompanying drawings.
A kind of method that crude benzol in coke-stove gas is reclaimed using tar washing oil of the present invention, is comprised the following steps：
（1）The beta-methylnaphthalene of crude tar washing oil quality 5%~6% is added into crude tar washing oil, obtains being modified tar washing oil；
（2）The coke-stove gas that temperature is 5~15 DEG C is passed through, the coke-stove gas is washed using the modified tar washing oil, collected
Absorb and wash benzene rich oil after crude benzol；
（3）The benzene rich oil of washing is subjected to de- benzene processing, collects crude benzol.
Common tar wash oil character can not meet that low temperature washes the requirement of benzene at present, and key factor is easy under tar washing oil low temperature
The problem of producing crystallization.Tar washing oil is not separated out crystallization, it is necessary to add the material that can form eutectic point mixture, pass through
The physical property and chemical property of methyl naphthalene and naphthalene are analyzed, both have similar property, but alpha-methyl-naphthalene in tar washing oil
Fusing point（-30.6℃）With the fusing point of beta-methylnaphthalene（34.58℃）Substantially than naphthalene（80.5℃）It is lower, and methyl naphthalene also may be used
With with part high boiling substance（Acenaphthene, fluorenes）Eutectic point mixture is formed, reaches the purpose for reducing tar washing oil crystalline temperature, to Jiao
When the amount that beta-methylnaphthalene is added in oil wash oil is the 5%~6% of washing oil, the crystalline temperature of tar washing oil is minimum, and crystal is most not easy
Formed, the control of tar washing oil amount containing beta-methylnaphthalene, be to ensure tar washing oil at 5~15 DEG C without solid sediment.If containing β-
Methyl naphthalene is too high, easily separates out crystallization, necessarily causes the increase of washing oil viscosity, washing oil sprinkling atomizing effect is poor, is washing coal in benzene column
Gas contacts absorption area reduction with washing oil, inhales benzene ability and declines, and gas blending rises after washing benzene column, and easily blocks pipeline and set
It is standby；
The preference temperature for washing benzene is reduced to 10 DEG C by original 25 DEG C, is because the size of the rate of recovery depends on following factor：
Absorb temperature, tar washing oil internal circulating load and its relative molecular mass, the content of benzene hydrocarbon, gas speed in coal gas and tar washing oil
And pressure, wash construction and packing property of benzene column etc..Temperature can be absorbed by reducing in the case of ceteris paribus, make to wash
The vapour pressure of benzene hydrocarbon reduces on oil level, absorption driving force increase, the crude benzol content rise balanced in washing oil with it, in coal gas
Benzene hydrocarbon content reduce, i.e., more benzene hydrocarbons are absorbed by washing oil, so as to improve the rate of recovery of crude benzol.
Existing tar washing oil mainly includes alpha-methyl-naphthalene, beta-methylnaphthalene, 1,3- dimethylnaphthalenes, biphenyl, naphthalene, acenaphthene, fluorenes, oxygen
The components such as fluorenes, quinoline, indoles, isoquinolin, indenes.Tar washing oil selected by the present invention is coal tar to be evaporated at 230~300 DEG C
Point, further, can be selected cut of the coal tar at 230-270 DEG C, the high melting point component content in tar washing oil reduces, then
Beta-methylnaphthalene is added, tar washing oil crystalline temperature can be lower, and the absorbability of resulting modification tar washing oil is more preferable.Modified tar
Washing oil absorbs crude benzol, is changed into washing benzene rich oil, washes the benzene rich oil 2%-2.5% of amount containing crude benzol, and it is higher to wash benzene rich oil uptake, crude benzol recovery
Rate is also higher；Wash benzene rich oil to handle by de- benzene, take off the crude benzol of absorption, turn into oil-poor, it is described it is oil-poor after cooling treatment again
Return to poor oil groove to recycle, the oil-poor 0.2%-0.4% of amount containing crude benzol, it is oil-poor in its smaller re-absorption ability of amount containing crude benzol it is stronger；
Content≤0.6g/ m3 of benzene hydrocarbon in the coke-stove gas after benzene are washed, wash the lower card of content of benzene hydrocarbon in the coke-stove gas after benzene
The absorption benzene ability of bright modified tar washing oil is stronger, i.e. the rate of recovery of crude benzol is higher.
Explanation is further explained to above-mentioned preparation method below.
Preferably, modified tar washing oil is sprayed using spray equipment, washs the coke-stove gas；
It is further preferred that the spray equipment is crude benzol absorption tower, it is described modified burnt in crude benzol absorbing tower top spray leaching
Oil wash oil, after the coke-stove gas is cooled into 5~15 DEG C, it is passed through the suction crude benzol and receives in tower, carry out washing benzene processing.
Preferably, the density range of the modified tar washing oil is 1.03~1.06g/ml, and the density of tar washing oil is too big,
Illustrate that polymer in tar washing oil and high boiling component content are more, molecular weight is big, absorbs the poor performance of crude benzol；Tar washing oil
Density it is too small, in Tuo Ben workshop sections distillation procedure caused by divide again contracting oil be just not easy to be separated from water, it may appear that in water band oil or oil
The middle phenomenon with water, causing the consumption of tar washing oil increases, and has a strong impact on the normal operating for washing benzene.
Preferably, phenol content≤0.5% of the modified tar washing oil, the too high levels of phenol, easily washes water and tar
Oil forms emulsion, and benzene efficiency is washed in influence；Meanwhile phenol can make tar washing oil become sticky, can improve the viscosity of tar washing oil, increase
Add circulation resistance, have a strong impact on crude benzol recovery efficiency.
Preferably, the water content of the modified tar washing oil answers≤1%, if water content is too high, can cause whole crude benzol system
System operation is chaotic, so, coke-stove gas temperature is high 2~3 DEG C after cooling treatment post-modification tar washing oil temperature is than cooling treatment,
Entered with preventing moisture condensation in coal gas in tar washing oil.
Preferably, the viscosity E (50)≤1.5 of the modified tar washing oil, the viscosity of tar washing oil is too high, can cause to flow
The reduction of dynamic property, causes tar washing oil can not be uniformly distributed on benzene inner-tower filling material is washed, so that coal gas and the contact of tar washing oil
Insufficient, serious reduce washes benzene efficiency.
Preferably, the mean molecule quantity of the modified tar washing oil is 160~170, the molecular weight of crude benzol and tar washing oil
Closer, the absorption of crude benzol is more complete；Conversely, tar washing oil molecular weight is too small when can cause Tuo Ben workshop sections, crude benzol and tar are washed
Oil is not readily separated, and influences the absorption of crude benzol.
Preferably, use the modified tar washing oil to wash the absorption temperature of the coke-stove gas as 10 DEG C, other because
Temperature can be absorbed by reducing in the case that element is constant, make the vapour pressure of benzene hydrocarbon on washing oil liquid level reduce, absorption driving force increases
Add, the crude benzol content rise balanced in washing oil with it, the benzene hydrocarbon content in coal gas is reduced, i.e., more benzene hydrocarbons are inhaled by washing oil
Receive, so as to improve the rate of recovery of crude benzol.
A kind of method that crude benzol in coke-stove gas is reclaimed using tar washing oil provided by the present invention, can realize that low temperature is washed
Benzene process, makes that content of the crude benzol in tar washing oil is higher, and the benzene content of the coke-stove gas after washing is lower, and crude benzol recovery rate carries
Up to 97%~98.5%.
In order to better illustrate the method provided in an embodiment of the present invention that crude benzol in coke-stove gas is reclaimed using tar washing oil,
Illustrated below by embodiment is further.
Embodiment 1
The measure of sample tar washing oil crystalline temperature
Using segmentation lowering temperature crystallization measure crude tar washing oil crystal.
Experimental procedure：
（1）Filtering：Crude tar washing oil is filtered at room temperature, removes its solid impurity；
（2）Makes sample：Tar washing oil sample 100g is taken, is placed in 500ml sealing container；
（3）It is segmented decrease temperature crystalline：Sample is placed in refrigerator, tested in refrigerator, gradually reduces temperature 1 DEG C of cooling every time
And 30min is kept, make its heat transfer fully (moment observation tar washing oil change and temperature reading situation）, record and occur what is crystallized
Temperature；
（4）Record data, this crystallization temperature is as controlled temperature.
The determination data of sample tar washing oil crystalline temperature is as shown in table 1.
The determination data of the sample tar washing oil crystalline temperature of table 1
From data in table 1, sample starts to crystallize at 4 degrees Celsius, contrasting data based on this data.
Embodiment 2
Tar washing oil crystalline temperature temperature measuring after addition beta-methylnaphthalene
Washed to solve low temperature in benzene process, tar washing oil separates out the problem of crystallizing, and can be formed using addition with crystal low
The method of the reagent of congruent melting azeotropic mixture.
Tar washing oil crystal is determined using segmentation lowering temperature crystallization.
Experimental procedure：
（1）Filtering：Filtered tar washing oil at room temperature, remove its solid impurity；
（2）Makes sample：Tar washing oil sample 100g is taken, is placed in 500mL sealing containers, makes 10 samples, respectively numbering 1
~10, it is separately added into 1~10g in 10 bottles（By each addition increase 1g of sample number order）The beta-methylnaphthalene of inequality
（98%）, fully shaking, make its dissolving；
（3）It is segmented decrease temperature crystalline：10 samples are placed in refrigerator, carry out water-bath cooling using frozen water, and monitor water temperature simultaneously
With tar washing oil temperature, tested in refrigerator, gradually reduce temperature, reduced by 1 DEG C every time and preserve 30min, make its heat transfer
Fully, there is the temperature crystallized in record.
The crystalline temperature determination data of tar washing oil is as shown in table 2 after addition methyl naphthalene.
Table 2 adds the crystalline temperature determination data of tar washing oil after methyl naphthalene.
From data analysis in table 2 and Fig. 1：Reduction of the beta-methylnaphthalene for tar washing oil crystalline temperature temperature has more notable
Effect.When the amount of beta-methylnaphthalene is added in tar washing oil less than 6%, tar washing oil crystalline temperature is with methyl naphthalene addition
Increase and reduce；When the addition of the beta-methylnaphthalene in tar washing oil reaches 5%-6% of tar washing oil quality or so, tar is washed
The crystallization temperature of oil is minimum, and its crystalline temperature falls below 1.6 DEG C or so；Continue the addition of increase methyl naphthalene, the knot of tar washing oil
Brilliant temperature then starts slowly to raise.Therefore, the addition of beta-methylnaphthalene is advisable with the 5%-6% of tar washing oil quality.
Embodiment 3
Low temperature washes benzene
（1）The beta-methylnaphthalene of crude tar washing oil quality 6% is added into crude tar washing oil, obtains being modified tar washing oil；
（2）The preference temperature for washing benzene is reduced to 10 DEG C by original 25 DEG C；Coke-stove gas and modified tar washing oil are entered respectively
Row cooling treatment, the coke-stove gas temperature after cooling treatment is 15 DEG C, and the modification tar washing oil temperature after cooling treatment is
18℃；
（3）Modification tar washing oil after cooling treatment is drenched by crude benzol absorbing tower top spray, and at the cooling flowed from bottom to top
Coke-stove gas counter current contacting after reason, modified tar washing oil absorb crude benzol, are changed into washing benzene rich oil, wash benzene rich oil benzene content as 2%
（4）The benzene rich oil of washing is handled by de- benzene, is collected crude benzol, is turned into oil-poor, oil-poor benzene content is 0.4%, the oil-poor warp
Poor oil groove is returned after cooling treatment to recycle；
Embodiment 4
Low temperature washes benzene
（1）The beta-methylnaphthalene of crude tar washing oil quality 5.5% is added into crude tar washing oil, obtains being modified tar washing oil；
（2）The preference temperature for washing benzene is reduced to 10 DEG C by original 25 DEG C；Coke-stove gas and modified tar washing oil are entered respectively
Row cooling treatment, the coke-stove gas temperature after cooling treatment is 13 DEG C, and the modification tar washing oil temperature after cooling treatment is
15℃；
（3）Modification tar washing oil after cooling treatment is drenched by crude benzol absorbing tower top spray, and at the cooling flowed from bottom to top
Coke-stove gas counter current contacting after reason, modified tar washing oil absorb crude benzol, are changed into washing benzene rich oil, washing benzene rich oil benzene content is
2.2%；
（4）The benzene rich oil of washing is handled by de- benzene, is collected crude benzol, is turned into oil-poor, and oil-poor benzene content is 0.3%, oil-poor through cooling
Poor oil groove is returned after processing to recycle.
Embodiment 5
Low temperature washes benzene
（1）The beta-methylnaphthalene of crude tar washing oil quality 5% is added into crude tar washing oil, obtains being modified tar washing oil；
（2）The preference temperature for washing benzene is reduced to 10 DEG C by original 25 DEG C；Coke-stove gas and modified tar washing oil are entered respectively
Row cooling treatment, the coke-stove gas temperature after cooling treatment are 5 DEG C, and the modification tar washing oil temperature after cooling treatment is 7
℃；
（3）Modification tar washing oil after cooling treatment is drenched by crude benzol absorbing tower top spray, and at the cooling flowed from bottom to top
Coke-stove gas counter current contacting after reason, modified tar washing oil absorb crude benzol, are changed into washing benzene rich oil, washing benzene rich oil benzene content is
2.5%；
（4）The benzene rich oil of washing is handled by de- benzene, is collected crude benzol, is turned into oil-poor, oil-poor benzene content is 0.2%, the oil-poor warp
Poor oil groove is returned after cooling treatment to recycle.
Coke-stove gas after washing is gone out by crude benzol absorbing tower top row, is transported to user, benzene hydrocarbon in the coke-stove gas after washing
Content be about 0.6g/ m3.
By above scheme, the crude benzol recovery rate that low temperature washes benzene technology reaches 97%~98.5%.
The content of general benzene hydrocarbon crude benzol in coke-stove gas is 25~40g/ m3, after washing benzene column recovery benzene hydrocarbon
Benzene hydrocarbon content in coal gas is 2~4g/ m3；Crude benzol recovery rate is 92%~95%.
From data above, a kind of method that crude benzol in coke-stove gas is reclaimed using tar washing oil of the present invention, Neng Goushi
Existing low temperature washes benzene process, makes that content of the crude benzol in tar washing oil is higher, and the benzene content of the coke-stove gas after washing is lower, crude benzol
The rate of recovery is improved to 97%~98.5%, is directly increased the yield of crude benzol, is improved economic benefit.
General principle, principal character and the advantages of the present invention of the present invention has been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the simply explanation described in above-described embodiment and specification is originally
The principle of invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, the present invention
Claimed scope is by appended claims, specification and its equivalent thereof.
Claims (9)
- A kind of 1. method that crude benzol in coke-stove gas is reclaimed using tar washing oil, including at least following steps：（1）The beta-methylnaphthalene of crude tar washing oil quality 5%~6% is added into crude tar washing oil, obtains being modified tar washing oil；（2）The coke-stove gas that temperature is 5~15 DEG C is passed through, the coke-stove gas is washed using the modified tar washing oil, collected Absorb and wash benzene rich oil after crude benzol；（3）The benzene rich oil of washing is subjected to de- benzene processing, collects crude benzol.
- 2. the method according to claim 1 that crude benzol in coke-stove gas is reclaimed using tar washing oil, it is characterised in that use The modified tar washing oil of spray equipment spray, washs the coke-stove gas.
- 3. the method according to claim 2 that crude benzol in coke-stove gas is reclaimed using tar washing oil, it is characterised in that described Spray equipment is crude benzol absorption tower, the modified tar washing oil is drenched in the crude benzol absorbing tower top spray, by the coke-stove gas After being cooled to 5~15 DEG C, it is passed through the suction crude benzol and receives in tower, carry out washing benzene processing.
- 4. the method that crude benzol in coke-stove gas is reclaimed using tar washing oil according to claim any one of 1-3, its feature It is, the density range of the modified tar washing oil is 1.03~1.06g/ml.
- 5. the method that crude benzol in coke-stove gas is reclaimed using tar washing oil according to claim any one of 1-3, its feature It is, phenol content≤0.5% of the modified tar washing oil.
- 6. the method that crude benzol in coke-stove gas is reclaimed using tar washing oil according to claim any one of 1-3, its feature It is, the water content of the modified tar washing oil answers≤1%.
- 7. the method that crude benzol in coke-stove gas is reclaimed using tar washing oil according to claim any one of 1-3, its feature It is, the viscosity E (50)≤1.5 of the modified tar washing oil.
- 8. the method that crude benzol in coke-stove gas is reclaimed using tar washing oil according to claim any one of 1-3, its feature It is, the mean molecule quantity of the modified tar washing oil is 160~170.
- 9. the method that crude benzol in coke-stove gas is reclaimed using tar washing oil according to claim any one of 1-3, its feature It is, uses the modified tar washing oil to wash the absorption temperature of the coke-stove gas as 10 DEG C.
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| CN201710625805.9A CN107488458B (en) | 2017-07-27 | 2017-07-27 | A method of utilizing crude benzol in tar washing oil recycling coke-stove gas |
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| CN201710625805.9A CN107488458B (en) | 2017-07-27 | 2017-07-27 | A method of utilizing crude benzol in tar washing oil recycling coke-stove gas |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113322105A (en) * | 2021-07-02 | 2021-08-31 | 上海电气集团国控环球工程有限公司 | High-efficiency debenzolization and purification process for coke oven gas |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH072706A (en) * | 1993-06-16 | 1995-01-06 | Osaka Gas Co Ltd | Production of fluorene |
| CN102604689A (en) * | 2012-03-29 | 2012-07-25 | 陈新义 | Washing oil with low crystallization point for washing benzene and preparation method of washing oil |
| CN105985815A (en) * | 2015-02-02 | 2016-10-05 | 中国庆华能源集团有限公司 | Method for controlling benzene content of benzene-washed coke oven gas in coke oven gas benzene washing system |
-
2017
- 2017-07-27 CN CN201710625805.9A patent/CN107488458B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH072706A (en) * | 1993-06-16 | 1995-01-06 | Osaka Gas Co Ltd | Production of fluorene |
| CN102604689A (en) * | 2012-03-29 | 2012-07-25 | 陈新义 | Washing oil with low crystallization point for washing benzene and preparation method of washing oil |
| CN105985815A (en) * | 2015-02-02 | 2016-10-05 | 中国庆华能源集团有限公司 | Method for controlling benzene content of benzene-washed coke oven gas in coke oven gas benzene washing system |
Non-Patent Citations (1)
| Title |
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| 王翠萍等: "《煤焦化产品回收与加工》", 30 April 2014, 煤炭工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113322105A (en) * | 2021-07-02 | 2021-08-31 | 上海电气集团国控环球工程有限公司 | High-efficiency debenzolization and purification process for coke oven gas |
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