CN101139527A - Method for extracting multiple chemical products from coal-tar oil - Google Patents
Method for extracting multiple chemical products from coal-tar oil Download PDFInfo
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- CN101139527A CN101139527A CNA2007100471160A CN200710047116A CN101139527A CN 101139527 A CN101139527 A CN 101139527A CN A2007100471160 A CNA2007100471160 A CN A2007100471160A CN 200710047116 A CN200710047116 A CN 200710047116A CN 101139527 A CN101139527 A CN 101139527A
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Abstract
The invention discloses a method for extracting a plurality of chemicals from a coal tar, which comprises such procedures as heating the coal tar to 120-130 DEG C, dehydrating, fore running, separating, fine rectifying, and heavy-oil distilling, and getting 95 naphthalene, methyl naphthalene, anthracene oil, asphalt and heavy oil. The invention is of simple process, easy operation, rectifies coal tar several times; the extracted chemical products are of steady quality, the naphthalene is of high concentration, and the asphalt is of good quality. The invention is of low energy consumption, hence improves better the added value in processing coal tar in China.
Description
Technical field
The present invention relates to the coal tar processing technology field, especially a kind of method of from coal tar, extracting multiple Chemicals.
Background technology
At present, general tar processing is always isolated carbolineum, pitch earlier earlier, cuts three mixed cuts again and processes, and shortcoming is that isolated pitch is regulated the bituminous softening temperature with carbolineum in the course of processing in the back again, complex process, energy consumption height.
Number of patent application is: 200410012455.1, " from the method for coal tar production chemical product and oil fuel ", it becomes coal tar fractional distillation light, weighs two fractions, light fraction is lightweight coal tar and tar-bitumen.Light fraction is produced light-end products through hydrofining or upgrading.The combination of the processing of tar-bitumen and pit kiln or with the delayed coking combination, not only production more chemical products phenol, naphthalene and gasoline, diesel oil or light Fuel etc. also improve the quality or the direct production high carbon coke of pit kiln coke.Add a kind of inhibitor simultaneously, suppress slow down in the boiler tube or reactor in the knot charcoal, ensuring equipment can long-term operation, but this complex manufacturing, the energy consumption height, the also bad assurance of bituminous quality, the concentration degree of naphthalene is not high yet simultaneously.
Summary of the invention
A kind of method of from coal tar, extracting multiple Chemicals that the objective of the invention is to provide at the deficiencies in the prior art, the quality of chemical products of extraction is stable, naphthalene concentration degree height, asphalt quality is good, and technology is simple, and is easy to operate, and energy consumption is low.
The object of the present invention is achieved like this: a kind of method of extracting multiple Chemicals from coal tar may further comprise the steps:
1, dehydration
Coal tar is heated to 120～130 ℃ through interchanger enters dehydration tower, isolate water and light oil constituents in the tar.
2, fore-running
Tar after the dehydration is heated to 285～300 ℃ through tube furnace, enters distillation tower, cat head cuts 185～250 ℃ three mixing cuts and send the washing tower dephenolize, and heavy oil fraction advances the process furnace heating at the bottom of the tower.
3, separate
With the naphthalene after the dephenolize is that cut is heated to 290～300 ℃ and enters rectifying tower, cat head cut 215 ~ 250 ℃ naphthalene be cut through condensation rear section backflow cat head, all the other send next procedure, tower bottom distillates heavy wash oil;
4, rectifying
With naphthalene is to enter rectifying tower after cut is heated to 265 ~ 270 ℃, and cat head cuts 215 ~ 220 ℃ cut through condensation rear section backflow cat head, and all the other are finished product 95 naphthalenes, and tower bottom distillate is the finished product methylnaphthalene;
5, heavy oil distillation
Mink cell focus is heated to 380～400 ℃ of laggard rectifying tower through process furnace, and 280 ~ 360 ℃ of cuts that cat head cuts are through condensation rear section backflow cat head, and all the other are sold for finished product carbolineum, and tower bottom distillates pitch.
Described dephenolize is to be that 10～30% sodium hydroxide solution alkali cleaning three mixes cuts with concentration, isolates alkaline sodium phenolate and dephenolize oil, and steams stripping and remove behind the neutral oil in the alkaline sodium phenolate sulfuric acid decomposition with 30～60%.
Technology of the present invention is simple, and is easy to operate, and it repeatedly distills coal tar, and the quality of chemical products of extraction is stable, naphthalene concentration degree height, and asphalt quality is good, and energy consumption is low, thereby has promoted the added value of the present coal tar processing of China better.
Description of drawings
Accompanying drawing is a process flow diagram of the present invention
Embodiment
Embodiment 1
Consult accompanying drawing, the present invention is undertaken by following processing step:
1, dehydration
100kg coal tar is heated to 120 ℃ through interchanger 9, enters dehydration tower 1, total reflux for some time, wait stable operation after, the water and the light oil on excision cat head top, and its standing separation gone out light oil products, tower bed coke oil send next procedure to handle.
2, fore-running
The tar that removes water and light oil after being heated to 290 ℃, tube furnace 2 is entered distillation tower 3, cat head cuts 185 ℃～249 ℃ three mixing cuts and send washing tower 4 dephenolizes, the distilled heavy oil fraction then advances process furnace 7 heating at the bottom of the tower, three dephenolizes that mix cut are isolated alkaline sodium phenolate and dephenolize oil with 30% sodium hydroxide solution alkali cleaning, more alkaline sodium phenolate are decomposed except that the sulfuric acid with 60% behind the neutral oil with steaming stripping.
3, separate
With the naphthalene after the dephenolize is that cut is heated to 295 ℃ and enters distillation tower 5 de-oilings, cat head cut 217 ℃～247 ℃ naphthalene be cut through condensation rear section backflow cat head, all the other send next procedure rectifying, tower bottom distillates the finished product heavy wash oil.
4, rectifying
With naphthalene is to enter rectifying tower 6 after cut is heated to 270 ℃, and cat head cuts 215 ℃ cut through condensation rear section backflow cat head, and all the other are finished product 95 naphthalenes, and tower bottom distillate is the finished product methylnaphthalene.
5, heavy oil distillation
Heavy wash oil is heated to 385 ℃ of laggard rectifying tower 8 through process furnace 7, and 280 ℃～340 ℃ cuts that cat head cuts are through condensation rear section backflow cat head, and all the other are sold for finished product carbolineum, and tower bottom distillates pitch.
The quality product schedule of quantities
| Title | Quantity | Index | Remarks |
| Carbolineum | 24.9 | Moisture %=2.5 density=1.14g/cm 3 |
| Pitch | 52.22 | Softening temperature: 99.2 ℃ of ash content %=0.15 TI%=23 | |
| Water and light oil | 4.50 | ||
| Crude phenols | 1.90 | PH=5.5 moisture %=8% neutral oil %=0.4% | |
| Heavy wash oil | 6.72 | ||
| 95 naphthalenes | 9.6 | Ctystallizing point=78.2 ℃ ash content %=0.01 non-volatile content %=0.05 | |
| Mixed methylnaphthalene | 2.0 | Content %=62 naphthalene content %=8 moisture %=1.5 |
Embodiment 2
Consult accompanying drawing, the present invention is undertaken by following processing step:
1, dehydration
100kg coal tar is heated to 130 ℃ through interchanger 9, enters dehydration tower 1, total reflux for some time, wait stable operation after, the water and the light oil on excision cat head top, and its standing separation gone out light oil products, tower bed coke oil send next procedure to handle.
2, fore-running
The tar that removes water and light oil after being heated to 300 ℃, tube furnace 2 is entered distillation tower 3, cat head cuts 186 ℃～246 ℃ three mixing cuts and send washing tower 4 dephenolizes, the distilled heavy oil fraction then advances process furnace 7 heating at the bottom of the tower, three dephenolizes that mix cut are isolated alkaline sodium phenolate and dephenolize oil with 15% sodium hydroxide solution alkali cleaning, more alkaline sodium phenolate are decomposed except that the sulfuric acid with 30% behind the neutral oil with steaming stripping.
3, separate
With the naphthalene after the dephenolize is that cut is heated to 295 ℃ and enters distillation tower 5 de-oilings, cat head cut 215 ℃～245 ℃ naphthalene be cut through condensation rear section backflow cat head, all the other send next procedure rectifying, tower bottom distillates the finished product heavy wash oil.
4, rectifying
With naphthalene is to enter rectifying tower 6 after cut is heated to 265 ℃, and cat head cuts 218 ℃ cut through condensation rear section backflow cat head, and all the other are finished product 95 naphthalenes, and tower bottom distillate is the finished product methylnaphthalene.
5, heavy oil distillation
Heavy wash oil is heated to 395 ℃ of laggard rectifying tower 8 through process furnace 7, and 280 ℃～350 ℃ cuts that cat head cuts are through condensation rear section backflow cat head, and all the other are sold for finished product carbolineum, and tower bottom distillates pitch.
The quality product schedule of quantities
| Title | Quantity | Index | Remarks |
| Carbolineum | 47.70 | Moisture %=2.0 density=1.13g/cm 3 | |
| Pitch | 104.94 | Softening temperature: 98.5 ℃ of ash content %=0.1 TI%=24 | |
| Water and light oil | 9.2 | ||
| Crude phenols | 3.82 | PH=5.5 moisture %=6 neutral oil %=0.3 | |
| Heavy wash oil | 9.9 | ||
| 95 naphthalenes | 19.10 | Ctystallizing point=78.2 ℃ ash content %=0.01 non-volatile content %=0.05 | |
| Mixed methylnaphthalene | 5.34 | Content %=65 naphthalene content %=7 moisture %=1.6 |
Embodiment 3
Consult accompanying drawing, the present invention is undertaken by following processing step:
1, dehydration
100kg coal tar is heated to 125 ℃ through interchanger 9, enters dehydration tower 1, total reflux for some time, wait stable operation after, the water and the light oil on excision cat head top, and its standing separation gone out light oil products, tower bed coke oil send next procedure to handle.
2, fore-running
The tar that removes water and light oil after being heated to 295 ℃, tube furnace 2 is entered distillation tower 3, cat head cuts 187 ℃～247 ℃ three mixing cuts and send washing tower 4 dephenolizes, the distilled heavy oil fraction then advances process furnace 7 heating at the bottom of the tower, three dephenolizes that mix cut are isolated alkaline sodium phenolate and dephenolize oil with 20% sodium hydroxide solution alkali cleaning, more alkaline sodium phenolate are decomposed except that the sulfuric acid with 40% behind the neutral oil with steaming stripping.
3, separate
With the naphthalene after the dephenolize is that cut is heated to 300 ℃ and enters distillation tower 5 de-oilings, cat head cut 216～250 ℃ naphthalene be cut through condensation rear section backflow cat head, all the other send next procedure rectifying, tower bottom distillates the finished product heavy wash oil.
4, rectifying
After the de-oiling three mixed entering rectifying tower 6 after cut is heated to 270 ℃, cat head cuts 220 ℃ cut through condensation rear section backflow cat head, and all the other are finished product 95 naphthalenes, and tower bottom distillate is the finished product methylnaphthalene.
5, heavy oil distillation
Heavy wash oil is heated to 400 ℃ of laggard rectifying tower 8 through process furnace 7, and 281 ℃～348 ℃ cuts that cat head cuts are through condensation rear section backflow cat head, and all the other are sold for finished product carbolineum, and tower bottom distillates pitch.
The quality product schedule of quantities
| Title | Quantity | Index | Remarks |
| Carbolineum | 146.7 | Moisture %=1.8 density=1.13g/cm 3 | |
| Pitch | 311.25 | Softening temperature: 98.2 ℃ of ash content %=0.15 TI%=21 | |
| Water and light oil | 27.00 | ||
| Crude phenols | 9.93 | PH=5.5 moisture %=8.5 neutral oil %=0.6 |
| Heavy wash oil | 31.52 | ||
| 95 naphthalenes | 56.70 | Ctystallizing point=77.9 ℃ ash content %=0.02 non-volatile content %=0.07 | |
| Mixed methylnaphthalene | 16.90 | Content %=63.5 naphthalene content %=9 moisture %=2.1 |
Claims (2)
1. method of extracting multiple Chemicals from coal tar is characterized in that may further comprise the steps:
(1) dehydration
Coal tar is heated to 120～130 ℃ through interchanger (9) enters dehydration tower (1), isolate water and light oil constituents in the tar;
(2) fore-running
Tar after the dehydration is heated to 285～300 ℃ through tube furnace (2), enters distillation tower (3), cat head cuts 185～250 ℃ three mixing cuts and send washing tower (4) dephenolize, and heavy oil fraction advances process furnace (7) heating at the bottom of the tower;
(3) separate
With the naphthalene after the dephenolize is that cut is heated to 290～300 ℃ and enters rectifying tower (5) rectifying, cat head cut 215～250 ℃ naphthalene be cut through condensation rear section backflow cat head, all the other send next procedure, tower bottom distillates heavy wash oil;
(4) rectifying
With naphthalene is to enter rectifying tower (6) after cut is heated to 265～270 ℃, and cat head cuts 215～220 ℃ cut through condensation rear section backflow cat head, and all the other are finished product 95 naphthalenes, and tower bottom distillate is the finished product methylnaphthalene;
(5) heavy oil distillation
Mink cell focus is heated to 380～400 ℃ of laggard rectifying tower (8) through process furnace (7), and 280～360 ℃ of cuts that cat head cuts are through condensation rear section backflow cat head, and all the other are sold for finished product carbolineum, and tower bottom distillates pitch.
2. according to the described method of from coal tar, extracting multiple Chemicals of claim 1, it is characterized in that described dephenolize is is that 10～30% sodium hydroxide solution alkali cleaning three mixes cuts with concentration, isolate alkaline sodium phenolate and dephenolize oil, and steam stripping and remove behind the neutral oil in the alkaline sodium phenolate sulfuric acid decomposition with 30～60%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNB2007100471160A CN100556989C (en) | 2007-10-17 | 2007-10-17 | A kind of method of from coal tar, extracting multiple Chemicals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100471160A CN100556989C (en) | 2007-10-17 | 2007-10-17 | A kind of method of from coal tar, extracting multiple Chemicals |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101139527A true CN101139527A (en) | 2008-03-12 |
| CN100556989C CN100556989C (en) | 2009-11-04 |
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| CN102021011A (en) * | 2010-12-29 | 2011-04-20 | 攀钢集团钢铁钒钛股份有限公司 | Method for producing asphalt from coal tar |
| CN101323788B (en) * | 2008-07-31 | 2011-07-27 | 上海奥韦通工程技术有限公司 | Processing process for preparing various asphalt and fuel oil with coal tar |
| CN102161901A (en) * | 2011-03-19 | 2011-08-24 | 宝钢工程技术集团有限公司 | Coal tar alkali-free normal/reduced-pressure distillation process and device |
| CN102161902A (en) * | 2011-03-21 | 2011-08-24 | 上海同特化工科技有限公司 | Coal tar deep processing technology based on four mixed fractions |
| CN102206140A (en) * | 2011-04-02 | 2011-10-05 | 金能科技有限责任公司 | Method and production system for separating and recovering phenol oil and simultaneously producing sodium sulfite through sodium phenolate acidolysis |
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| CN113150811A (en) * | 2020-01-07 | 2021-07-23 | 上海圣升化工科技有限公司 | Coal tar deep processing technology |
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| CN100556989C (en) | 2009-11-04 |
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