CN108728275A - The application of the extractant and aromatic solvent naphtha of waxes in methanol to olefins reaction - Google Patents
The application of the extractant and aromatic solvent naphtha of waxes in methanol to olefins reaction Download PDFInfo
- Publication number
- CN108728275A CN108728275A CN201710249456.5A CN201710249456A CN108728275A CN 108728275 A CN108728275 A CN 108728275A CN 201710249456 A CN201710249456 A CN 201710249456A CN 108728275 A CN108728275 A CN 108728275A
- Authority
- CN
- China
- Prior art keywords
- extractant
- aromatic solvent
- methanol
- solvent naphtha
- dimethylbenzene
- 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
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 title claims abstract description 66
- 239000003849 aromatic solvent Substances 0.000 title claims abstract description 35
- 239000001993 wax Substances 0.000 title claims abstract description 33
- 150000001336 alkenes Chemical class 0.000 title claims abstract description 22
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 21
- 150000004945 aromatic hydrocarbons Chemical class 0.000 claims description 10
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 abstract description 41
- 238000000605 extraction Methods 0.000 abstract description 14
- 238000004140 cleaning Methods 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 6
- 230000001988 toxicity Effects 0.000 abstract description 5
- 231100000419 toxicity Toxicity 0.000 abstract description 5
- 238000009835 boiling Methods 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 33
- 238000012360 testing method Methods 0.000 description 18
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 12
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 12
- 238000000034 method Methods 0.000 description 12
- 238000002474 experimental method Methods 0.000 description 9
- 239000007788 liquid Substances 0.000 description 9
- 239000002904 solvent Substances 0.000 description 8
- 239000000498 cooling water Substances 0.000 description 7
- 239000004519 grease Substances 0.000 description 6
- 238000003860 storage Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000000746 purification Methods 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 238000005406 washing Methods 0.000 description 4
- 238000003556 assay Methods 0.000 description 3
- 239000003245 coal Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000008096 xylene Substances 0.000 description 3
- RWGFKTVRMDUZSP-UHFFFAOYSA-N cumene Chemical compound CC(C)C1=CC=CC=C1 RWGFKTVRMDUZSP-UHFFFAOYSA-N 0.000 description 2
- -1 ethylene, propylene Chemical group 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- JRLPEMVDPFPYPJ-UHFFFAOYSA-N 1-ethyl-4-methylbenzene Chemical compound CCC1=CC=C(C)C=C1 JRLPEMVDPFPYPJ-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 235000014121 butter Nutrition 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 231100000989 no adverse effect Toxicity 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010117 shenhua Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 230000003442 weekly effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
- C11D7/22—Organic compounds
- C11D7/24—Hydrocarbons
- C11D7/247—Hydrocarbons aromatic
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
- C11D7/50—Solvents
- C11D7/5004—Organic solvents
- C11D7/5027—Hydrocarbons
-
- C11D2111/20—
Abstract
The invention belongs to MTO technology technical fields, and in particular to the application of the extractant and aromatic solvent naphtha of waxes in a kind of methanol to olefins reaction.The extractant includes aromatic solvent naphtha, content >=20%VOL of the aromatic solvent naphtha.Extractant provided by the invention is equal with the extraction efficiency of pure dimethylbenzene, and the toxicity and corrosivity when than pure dimethylbenzene as extractant are small；Fusing point, boiling point and flash-point are higher than dimethylbenzene, safer compared with dimethylbenzene；Price is lower than dimethylbenzene, being capable of effectively save cleaning cost.
Description
Technical field
The invention belongs to MTO technology technical fields, and in particular to waxes in a kind of methanol to olefins reaction
The application of extractant and aromatic solvent naphtha in methanol to olefins reaction as the extractant of waxes.
Background technology
Increasingly growth with economic development and to ethylene, propylene demand, the naphtha, light as alkene raw materials for production
The resources such as diesel oil are faced with increasingly severe short situation.The chemical industry route of non-oil resource production alkene starts by universal
Attention.Methanol-to-olefins (MTO) technique is a kind of using coal base or the methanol of natural gas base synthesis as raw material production low-carbon alkene
Chemical Engineering Technology, technology improve to ensure low-carbon alkene stable supplying be of great significance.
On August 8th, 2010, head set industrialization methanol-to-olefins devices in the world are in Shenhua Group Co packet header
Coal chemical industry branch company goes into operation, and after the device realizes the commercialized running stage in 2011, changes by constantly technical optimization
Make, make the covering device reach at full capacity, efficient working condition, realize good economic benefit and social benefit, success
Monopolization of the states such as virtue in terms of DMTO techniques and catalyst is broken, has indicated that China takes the lead in having grasped the industrialization of coal base alkene
Key technology has started the new way of high-carbon energy low-carbon and oil replacement, has for national energy strategic security important
Meaning.
But through operation in a few years, some problems are also gradually exposed, and become restriction project long period even running
Bottleneck.For example, the oily substance generated in methanol-to-olefins reaction process causes the water of the olefin separation of system downstream
It washes tower, heat exchanger and air cooler frequently to block, causes in methanol-to-olefins product gas that oxide removal effect is poor, caustic wash tower
A series of problems, such as butter production quantity is big, blocking tower tray, seriously affects device long-term operation.
The cleaning of heat exchanger and air cooler has to continue to carry out, and at least to clean weekly three times, every heat exchanger is taken out
About 20,000 yuan of fuse cleaning charge, annual cleaning charge is at about 3,000,000 yuan；Since main washing tower tray floor blocks, device goes into operation operation
Pressure difference superelevation, up to 40KPa after three months, seriously affect device long-term operation, 2 months 2012, due to main washing
Tower pressure difference is high, and device must not carry out washing tower processing without local shut-down, and product gas is set fire torch during washing tower, consumes methanol altogether
About 2700t is calculated by factory cost valence, and expense is also 3,000,000 or more.
At this stage the covering device take dimethylbenzene as extractant in device wax and grease clean, clearly
Wash that effect is ideal, but the toxicity of dimethylbenzene is big, there are great security risk, this just there is an urgent need for find it is a kind of it is new compared with
Dimethylbenzene small toxicity and lower-cost extractant, to solve defect existing in the prior art.
Invention content
In order to solve the above-mentioned technical problem, the purpose of the present invention is to provide a kind of small toxicities, at low cost and to methanol system
The extractant of waxes in the methanol to olefins reaction that olefine reaction has no adverse effect.
To realize the above-mentioned technical purpose, the present invention uses technical solution below：
The extractant of waxes in a kind of methanol to olefins reaction, the extractant includes aromatic solvent naphtha, the aromatic hydrocarbons
Content >=20%VOL of solvent naphtha.
Preferably, C9 arene contents are 80~98%VOL in the aromatic solvent naphtha.
As further preferred, C9 arene contents are 88~92%VOL in the aromatic solvent naphtha.
As still more preferably, C9 arene contents are 90%VOL in the aromatic solvent naphtha.
Another object of the present invention is to provide aromatic solvent naphthas in methanol to olefins reaction as the extraction of waxes
The application of agent.
The present invention has at least following advantageous effect：
(1) extractant provided by the invention is equal with the extraction efficiency of pure dimethylbenzene, benzene, toluene and diformazan in this extractant
Benzene content is very low, and the toxicity and corrosivity when than pure dimethylbenzene as extractant are small；
(2) fusing point of extractant provided by the invention, boiling point and flash-point are higher than dimethylbenzene, safer compared with dimethylbenzene；
(3) extractant price provided by the invention is lower than dimethylbenzene, can effectively save cleaning cost, be conducive to reduce enterprise
Production cost.
Description of the drawings
The following drawings are only intended to schematically illustrate and explain the present invention, not delimit the scope of the invention.Wherein：
Fig. 1 is the structural schematic diagram of extractant performance test experimental apparatus.
In figure：1- boilers；2- electric heaters；3- thermometers I；4- hot water elevator pumps；5- hot water stream gauge；6- thermometers
II；7- heat exchangers；8- thermometers III；9- extractant storage tanks；10- extractant circulating pumps；11- extractant flowmeters；12- is cooled down
Water ga(u)ge；13- thermometers IV.
Specific implementation mode
With reference to the accompanying drawings and examples, the present invention is further explained.In the following detailed description, only pass through explanation
Mode describes certain exemplary embodiments of the present invention.Undoubtedly, those skilled in the art will recognize,
In the case of without departing from the spirit and scope of the present invention, described embodiment can be repaiied with a variety of different modes
Just.Therefore, attached drawing and description are regarded as illustrative in nature, and are not intended to limit the scope of the claims.
Embodiment 1
In the present embodiment, the extractant of waxes is 100%VOL aromatic solvent naphthas in methanol to olefins reaction, is utilized
Reform heavy aromatics be raw material by efficient rectifying isolation technics be made, main component be isopropylbenzene, n-proplbenzene, p-methyl-ethylbenzene,
It is about 90% that wherein arene content, which is 99.98%, C9 arene contents, and containing a small amount of benzene, toluene and dimethylbenzene, prevailing quality refers to
Mark such as table 1：
1. embodiment of the present invention of table, 1 extractant primary quality measure
1 extractant of the embodiment of the present invention and dimethylbenzene property comparison such as table 2：
2. extractant of the present invention of table is compared with dimethylbenzene property
Embodiment 2
In the present embodiment, the extractant of waxes is 10%vol aromatic solvent naphthas+90%vol in methanol to olefins reaction
Water mixed liquid.
Embodiment 3
In the present embodiment, the extractant of waxes is 20%vol aromatic solvent naphthas+80%vol in methanol to olefins reaction
Water mixed liquid.
Embodiment 4
In the present embodiment, the extractant of waxes is 50%vol aromatic solvent naphthas+50%vol in methanol to olefins reaction
Water mixed liquid.
Comparative example 5
In this comparative example, the extractant of waxes is dimethylbenzene in methanol to olefins reaction.
Experimental comparison
Extractant performance test experimental apparatus as shown in Figure 1 is used below, is carried out respectively two in blank assay, comparative example
Toluene extraction experiments and each embodiment extractant extraction experiments in the present invention.
(1) blank assay：
Tap water is heated to set temperature in boiler 1 through electric heater 2, and thermometer I3 shows water temperature in boiler 1；
Open cooling water, record cooling water temperature (display of thermometer IV 13)；Hot water circulating pump 4 is opened, adjusts hot water stream gauge 5 to setting
Constant current magnitude after stable, while recording the displays temperature of thermometer II6, thermometer III8, calculates temperature difference △ T0.
(2) 5 extractant of comparative example (dimethylbenzene) extraction experiments：
Wax after purification is melted in suitable softening temperature, wax is applied to heat exchanger appearance with hairbrush
Face, thickness control is in 1cm or so；(1) the blank test process of repetition, tests and records the out temperature and temperature difference △ of hot water
T1；It is then shut off hot water elevator pump and cooling water, the dimethylbenzene in extractant storage tank 9 is pumped by opening extractant circulating pump 10 to be changed
20min is recycled in hot device 7, is set and is recorded 11 flow value of extractant flowmeter；After repeat (1) blank test process, survey
Try and record the out temperature and temperature difference △ T2 of hot water.
(3) 1 extractant of the embodiment of the present invention (100% aromatic solvent naphtha) extraction experiments：
Wax after purification is melted in suitable softening temperature, wax is applied to heat exchanger appearance with hairbrush
Face, thickness control is in 1cm or so；(1) the blank test process of repetition, tests and records the out temperature and temperature difference △ of hot water
T1；It is then shut off hot water elevator pump and cooling water, opens extractant circulating pump 10 by the extractant of the present invention in extractant storage tank 9
It is pumped into heat exchanger 7 and recycles 20min, set and record 11 flow value of extractant flowmeter；After repeat (1) blank test
The out temperature and temperature difference △ T3 of hot water are tested and recorded to journey.
(4) 2 extractant of the embodiment of the present invention (+90% water mixed liquid of 10% aromatic solvent naphtha) extraction experiments：
Wax after purification is melted in suitable softening temperature, wax is applied to heat exchanger appearance with hairbrush
Face, thickness control is in 1cm or so；(1) the blank test process of repetition, tests and records the out temperature and temperature difference △ of hot water
T1；It is then shut off hot water elevator pump and cooling water, opens extractant circulating pump 10 by 10% aromatic solvent in extractant storage tank 9
Oily+90% water mixed liquid, which is pumped into heat exchanger 7, recycles 20min, sets and records 11 flow value of extractant flowmeter；After weight
Multiple (1) blank test process, tests and records the out temperature and temperature difference △ T3 of hot water.
(5) 3 extractant of the embodiment of the present invention (+80% water mixed liquid of 20% aromatic solvent naphtha) extraction experiments：
Wax after purification is melted in suitable softening temperature, wax is applied to heat exchanger appearance with hairbrush
Face, thickness control is in 1cm or so；(1) the blank test process of repetition, tests and records the out temperature and temperature difference △ of hot water
T1；It is then shut off hot water elevator pump and cooling water, opens extractant circulating pump 10 by 20% aromatic solvent in extractant storage tank 9
Oily+80% water mixed liquid, which is pumped into heat exchanger 7, recycles 20min, sets and records 11 flow value of extractant flowmeter；After weight
Multiple (1) blank test process, tests and records the out temperature and temperature difference △ T3 of hot water.
(6) 4 extractant of the embodiment of the present invention (+50% water mixed liquid of 50% aromatic solvent naphtha) extraction experiments：
Wax after purification is melted in suitable softening temperature, wax is applied to heat exchanger appearance with hairbrush
Face, thickness control is in 1cm or so；(1) the blank test process of repetition, tests and records the out temperature and temperature difference △ of hot water
T1；It is then shut off hot water elevator pump and cooling water, opens extractant circulating pump 10 by 50% aromatic solvent in extractant storage tank 9
Oily+50% water mixed liquid, which is pumped into heat exchanger 7, recycles 20min, sets and records 11 flow value of extractant flowmeter；After weight
Multiple (1) blank test process, tests and records the out temperature and temperature difference △ T3 of hot water.
Experimental data such as table 3：
3. blank assay of table, xylene extraction experiment and extractant extraction experiments data of the present invention
Wherein：[1- (△ T0- △ T3)/△ T0] * 100% indicates this respectively with [1- (△ T0- △ T2)/△ T0] * 100%
Heat exchanger efficiency and heat exchanger efficiency after xylene extraction after the extractant extraction that invention provides.
Shown after mixing aromatic solvent naphtha by different volumes with water as extractant to wax-like by 3 experimental data of table
Object and grease are extracted, and after 10% aromatic solvent oil wash, heat exchange efficiency recovery rate is between 70%~90%；20%
Aromatic solvent oil wash after, heat exchange efficiency is substantially equal with the efficiency that 100% aromatic solvent naphtha directly extracts；50% virtue
After hydrocarbon solvent oil wash, heat exchange efficiency is substantially equal with the efficiency that 100% aromatic solvent naphtha directly extracts.It can thus be appreciated that aromatic hydrocarbons
Solvent naphtha can wash wax and grease separately as extractant, and wax is washed after can also being mixed in a certain ratio with water
Shape object and grease.The percentage by volume of aromatic solvent naphtha imitates the cleaning of wax and grease when between 20~100%
Fruit is preferable.
Thus infer, can also be used in mixed way using aromatic solvent naphtha as extractant with other solvents, with other solvents
When wax and grease are washed in mixing, on condition that do not react with other solvents, and other solvents fill reaction
It sets with process system without influence.Other solvents can be the organic solvents such as benzene,toluene,xylene, methanol, and details are not described herein.
The foregoing is merely the schematical specific implementation modes of the present invention, are not limited to the scope of the present invention.It is any
Those skilled in the art, made equivalent variations and modification under the premise of not departing from design and the principle of the present invention,
The scope of protection of the invention should all be belonged to.
Claims (5)
1. the extractant of waxes in methanol to olefins reaction, which is characterized in that the extractant includes aromatic solvent naphtha, described
Content >=20%VOL of aromatic solvent naphtha.
2. the extractant of waxes in methanol to olefins reaction as described in claim 1, it is characterised in that：The aromatic solvent
C9 arene contents are 80~98%VOL in oil.
3. the extractant of waxes in methanol to olefins reaction as claimed in claim 2, it is characterised in that：The aromatic solvent
C9 arene contents are 88~92%VOL in oil.
4. the extractant of waxes in methanol to olefins reaction as claimed in claim 3, it is characterised in that：The aromatic solvent
C9 arene contents are 90%VOL in oil.
5. application of the aromatic solvent naphtha in methanol to olefins reaction as the extractant of waxes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710249456.5A CN108728275A (en) | 2017-04-17 | 2017-04-17 | The application of the extractant and aromatic solvent naphtha of waxes in methanol to olefins reaction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710249456.5A CN108728275A (en) | 2017-04-17 | 2017-04-17 | The application of the extractant and aromatic solvent naphtha of waxes in methanol to olefins reaction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108728275A true CN108728275A (en) | 2018-11-02 |
Family
ID=63923790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710249456.5A Pending CN108728275A (en) | 2017-04-17 | 2017-04-17 | The application of the extractant and aromatic solvent naphtha of waxes in methanol to olefins reaction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108728275A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101824336A (en) * | 2010-04-22 | 2010-09-08 | 中国寰球工程公司辽宁分公司 | Technique for producing terphenyl, indane and aromatics solvent oil by cracking C9 fraction and hydrogenation |
| CN102659497A (en) * | 2012-05-14 | 2012-09-12 | 神华集团有限责任公司 | Water system of device for preparing olefins from methanol and on-line cleaning method thereof |
| CN105646126A (en) * | 2016-03-07 | 2016-06-08 | 南京师范大学 | Method for separating methylbenzene, dimethylbenzene and trimethylbenzene in aromatic solvent oil |
-
2017
- 2017-04-17 CN CN201710249456.5A patent/CN108728275A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101824336A (en) * | 2010-04-22 | 2010-09-08 | 中国寰球工程公司辽宁分公司 | Technique for producing terphenyl, indane and aromatics solvent oil by cracking C9 fraction and hydrogenation |
| CN102659497A (en) * | 2012-05-14 | 2012-09-12 | 神华集团有限责任公司 | Water system of device for preparing olefins from methanol and on-line cleaning method thereof |
| CN105646126A (en) * | 2016-03-07 | 2016-06-08 | 南京师范大学 | Method for separating methylbenzene, dimethylbenzene and trimethylbenzene in aromatic solvent oil |
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Application publication date: 20181102 |