CN203782059U - Device for preparing crude carbolic acid from net phenol sodium salt employing three-tower series CO2 decomposition - Google Patents
Device for preparing crude carbolic acid from net phenol sodium salt employing three-tower series CO2 decomposition Download PDFInfo
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- CN203782059U CN203782059U CN201420103706.6U CN201420103706U CN203782059U CN 203782059 U CN203782059 U CN 203782059U CN 201420103706 U CN201420103706 U CN 201420103706U CN 203782059 U CN203782059 U CN 203782059U
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- tube
- crude phenols
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Abstract
The utility model discloses a device for preparing a crude carbolic acid from a net phenol sodium salt employing three-tower series CO2 decomposition. The device comprises a tube furnace, a CO2 purifying tower, a primary decomposition tower and a phenol sodium salt solution input pipe. The device is characterized in that a circulating water pipe is arranged at one side of the CO2 purifying tower; a purified exhaust gas is prepared by the CO2 purifying tower; the phenol sodium salt solution input pipe is accessed into the upper part inside an exhaust gas wash tower; the raw material of the net phenol sodium salt solution sequentially flows through a primary decomposition tower, a secondary decomposition tower and a triple decomposition tower, which are connected in parallel; the purified exhaust gas is simultaneously input into the primary decomposition tower, the secondary decomposition tower and the triple decomposition tower, so that the raw material of the net phenol sodium salt solution is continuously decomposed for three times, so as prepare a crude carbolic acid product and an Na2CO3 solution. The phenol sodium salt is sequentially and independently decomposed for three times, so that not only is a sulfuric acid replaced with carbon dioxide and pollution avoided, but also the purity of the crude carbolic acid product is improved, meanwhile, the exhaust gas is recycled in a sealing manner, and the production cost is reduced.
Description
Technical field
The utility model relates to the improvement that a kind of clean phenol sodium is produced crude phenols device, specifically a kind of clean three tower cascade connected CO of sodium phenolate
2decompose the device of producing crude phenols, belong to coal tar processing field.
Background technology
The clean sodium phenolate producing in coal tar processing is mainly as the raw material of producing crude phenols.At present, the production of crude phenols generally adopts sulfuric acid to decompose the traditional technology of clean sodium phenolate, add in washer by clean sodium phenolate, again under 0.04MPa pressure, slowly adding concentration is the sulfuric acid of 70-75%, at the temperature of 85-95 DEG C, through fully reaction, static after, above the crude phenols that decompose float on, bottom is the metabisulfite solution that proportion is larger.Its reaction equation is: 2C
5h
6oNa+H
2sO
4=2C
6h
5oH+Na
2sO
4.The existing deficiency of this method is: the one, and the metabisulfite solution producing in production process forms pollution to human body and environment, and can not directly discharge; The 2nd, the heat producing in decomposition course and flue gas, spill into part phenol volatilization in air, not only polluted air, and reduced the yield of crude phenols; The 3rd, vitriol oil medium can cause corrosion to equipment in decomposition course, and is implying accident potential.
In order to overcome the above problems, known by retrieving, some employing CO
2as reaction medium, described CO
2can derive from coke oven flue waste gas, tube furnace waste gas.Under normal circumstances, the CO in tube furnace waste gas
2content is 13-17%, temperature 200---250 DEG C; Contain in addition C
5h
6oNa.Waste gas is processed after filtration, sends into CO by blower fan
2epimere in decomposition tower and hypomere, clean sodium phenolate solution is pumped into CO through clean sodium phenolate
2top in decomposition tower, at CO
2in decomposition tower, clean sodium phenolate solution sprays downwards, and waste gas upwards flows, and successively through twice decomposition, can isolate crude phenols preliminary product and sodium carbonate solution at tower bottom.Reaction equation is:
2C
5H
6ONa+CO
2+H
2O?→?2C
6H
5OH+Na
2CO
3
The advantage of this technique is: not only significantly save sulfuric acid, and avoided pollution, reduced production cost, meanwhile, the sodium carbonate solution of gained can be used for processing tar again.The existing deficiency of this technique is: treatment capacity is less, for year coal tar processing amount be 100,000 tons of above enterprises, do not reach need of production, have not yet to see three tower cascade connected CO
2decompose, be applicable to the report of 100,000 tons of above tar processing unit (plant)s.
Summary of the invention
It is a kind of in coal tar processing that the purpose of this utility model is to provide, and not only avoid polluting, and amount of finish is large, is specially adapted to the three tower cascade connected CO of clean sodium phenolate of more than 100,000 tons tar processing
2decompose the device of producing crude phenols.
In order to reach above object, the technical scheme that the utility model adopts is: the three tower cascade connected CO of this clean sodium phenolate
2decompose the device of producing crude phenols, comprise tube furnace, CO
2scavenging tower, decomposition tower and sodium phenolate solution input tube, the flue gas output tube access CO of tube furnace
2middle and lower part in scavenging tower, the flue gas of tube furnace flows directly into CO
2in scavenging tower, at CO
2in scavenging tower, flue gas is cleaned, it is characterized in that: described CO
2one side of scavenging tower is provided with circulating pipe, and at the end of circulating pipe, section is provided with water circulating pump, the upper end access CO of circulating pipe
2top in scavenging tower is provided with the communicating pipe of accessing circulating water pool, at CO on circulating pipe
2the top of scavenging tower is provided with flue delivery trunk, sends into decomposition process through the flue gas purifying as decomposition media by flue delivery trunk;
Top in described sodium phenolate solution input tube access tail gas washing column, be provided with clean sodium phenolate solution conveyor tube in the bottom of tail gas washing column, the middle and lower part of the waste gas delivery trunk access tail gas washing column after decomposition, be provided with scrubbing exhaust gas output tube at the top of tail gas washing column, in tail gas washing column, spray downwards from the sodium phenolate solution of sodium phenolate solution input tube input, with waste gas delivery trunk input from decomposing, upwards after mobile decomposition, waste gas continues reaction, produce clean sodium phenolate solution, the clean sodium phenolate solution of producing enters decomposition process as raw material,
One side of a described decomposition tower side by side install secondary decomposition tower and three decomposition towers; Be provided with and CO in the middle and lower part of a decomposition tower
2the flue inlet branch that the flue delivery trunk of scavenging tower Base top contact is connected, flue is by the middle and lower part in a decomposition tower of flue inlet branch input; Access the input aperture of clean sodium phenolate solution conveyor tube on the top of a decomposition tower, clean sodium phenolate solution is inputted the top in a decomposition tower by clean sodium phenolate solution conveyor tube, and sprays downwards, mixes and reacts with upwards mobile flue; Be provided with the waste gas output arm after decomposition on the top of a decomposition tower, the waste gas output arm after decomposition is connected with the waste gas delivery trunk after decomposition; Be provided with and once decompose crude phenols output tube in the bottom of a decomposition tower; Be provided with one time Na in the bottom of a decomposition tower
2cO
3solution output tube; The crude phenols that once decompose of producing in a decomposition tower are input to the top in secondary decomposition tower by once decomposing crude phenols output tube again;
The middle and lower part of described secondary decomposition tower is provided with and CO
2the flue inlet branch that the flue delivery trunk of scavenging tower Base top contact is connected, flue is by the middle and lower part in flue inlet branch input secondary decomposition tower; The input aperture of once decomposing crude phenols output tube is accessed on top at secondary decomposition tower, once decompose crude phenols by once decomposing the top in crude phenols output tube input secondary decomposition tower, and spray downwards, with from flue inlet branch input and upwards mobile flue mix and react; Be provided with the waste gas output arm after decomposition on the top of secondary decomposition tower, the waste gas output arm after decomposition is connected with the waste gas delivery trunk after decomposition; Be provided with secondary in the bottom of secondary decomposition tower and decompose crude phenols output tube; Be provided with secondary Na in the bottom of secondary decomposition tower
2cO
3solution output tube; In waste gas input waste gas delivery trunk after decomposing in secondary decomposition tower; The secondary of producing decomposes crude phenols and decomposes the top in three decomposition towers of crude phenols output tube input by secondary, and spray downwards, with decompose for the second time from flue inlet branch input, upwards mobile flue, there is chemical reaction, make secondary and decompose crude phenols and secondary Na
2cO
3solution; The secondary decomposition crude phenols of producing decompose crude phenols output tube by secondary again and are input to the top in decomposition tower three times;
The middle and lower part of three times described decomposition towers is provided with and CO
2the flue inlet branch that the flue delivery trunk of scavenging tower Base top contact is connected, flue is by the middle and lower part in three decomposition towers of flue inlet branch input; The input aperture of decomposing crude phenols output tube at the top of three decomposition towers access secondary, secondary decomposes crude phenols and decomposes the top in three decomposition towers of crude phenols output tube input by secondary, and spray downwards, with from flue inlet branch input and upwards mobile flue mix and react; Be provided with the waste gas output arm after decomposition on the top of three decomposition towers, the waste gas output arm after decomposition is connected with the waste gas delivery trunk after decomposition; Be provided with three times in the bottom of three decomposition towers and decompose crude phenols output tube; Be provided with three times Na in the bottom of three decomposition towers
2cO
3solution output tube; In waste gas input waste gas delivery trunk after decomposing in three decomposition towers; The crude phenols that decompose for three times of producing decompose the output of crude phenols output tube by three times, decompose crude phenols three times and are product.
The utility model is also implemented by following measure: at CO
2the flue delivery trunk of scavenging tower Base top contact is provided with blower fan.
Described clean sodium phenolate solution conveyor tube is provided with medial launder.
A described Na
2cO
3solution output tube, secondary Na
2cO
3solution output tube and three Na
2cO
3solution output tube accesses same Na
2cO
3in solution storage trough.
Described once decomposition crude phenols output tube, secondary decomposes crude phenols output tube and only on sodium phenolate solution conveyor tube, is equipped with transferpump.
On described once decomposition crude phenols output tube and secondary decomposition crude phenols output tube, be equipped with medial launder, because current techique, so do not mark in figure.
The beneficial effects of the utility model are: the three tower cascade connected CO of this clean sodium phenolate
2decompose and produce the device of crude phenols, decomposes with current employing sodium phenolate the equipment of producing crude phenols by flue gas compared with, because sodium phenolate is successively by three independently decomposition, so, not only replace sulfuric acid with carbonic acid gas, avoided pollution, and improved the purity of crude phenols goods; Because flue gas has obtained sealing recycle, institute, so that fume waste heat has also obtained utilization, has reduced production cost; Due to the CO in sodium phenolate and flue gas
2carried out sufficient chemical reaction, the material obtaining is not only nontoxic, and can utilize, so, not only pollution-free, and reached whole recyclings, there is very large economic benefit and social benefit.
Brief description of the drawings
Fig. 1 is that equipment assembly structure master of the present utility model looks schematic diagram.
In figure: 1, tube furnace; 2, CO
2scavenging tower; 3, a decomposition tower; 4, tail gas washing column; 5, sodium phenolate solution input tube; 6, flue gas output tube; 7, circulating pipe; 8, water circulating pump; 9, communicating pipe; 10, secondary decomposition tower; 11, three decomposition towers; Waste gas output arm after 12a, 12b, 12c, decomposition; 13, the waste gas delivery trunk after decomposition; 14, flue delivery trunk; 15a, 15b, 15c, flue inlet branch; 16, scrubbing exhaust gas output tube; 17, clean sodium phenolate solution conveyor tube; 18, once decompose crude phenols output tube; 19, secondary decomposes crude phenols output tube; 20, a Na
2cO
3solution output tube; 21, secondary Na
2cO
3solution output tube; 22, three Na
2cO
3solution output tube; 23, decompose crude phenols output tube three times; 24, blower fan; 25, medial launder; 26, transferpump.
Embodiment
Make the utility model with reference to Fig. 1.The three tower cascade connected CO of this clean sodium phenolate
2decompose the device of producing crude phenols, comprise tube furnace 1, CO
2scavenging tower 2, decomposition tower 3 and a sodium phenolate solution input tube 5, the flue gas output tube 6 of tube furnace 1 accesses CO
2middle and lower part in scavenging tower 2, the flue gas of tube furnace 1 flows directly into CO
2in scavenging tower 2, at CO
2scavenging tower 2 is interior to be cleaned flue gas, it is characterized in that: described CO
2one side of scavenging tower 2 is provided with circulating pipe 7, and at the end of circulating pipe 7, section is provided with water circulating pump 8, the upper end access CO of circulating pipe 7
2top in scavenging tower 2, at CO
2in scavenging tower 2, water is sprayed downwards, the flue gas rising is washed, make gas cleaning, on circulating pipe 7, be provided with the communicating pipe 9 of access circulating water pool, at CO
2the top of scavenging tower 2 is provided with flue delivery trunk 14, sends into decomposition process through the flue gas purifying as decomposition media by flue delivery trunk 14;
The top that described sodium phenolate solution input tube 5 accesses in tail gas washing column 4, be provided with clean sodium phenolate solution conveyor tube 17 in the bottom of tail gas washing column 4, waste gas delivery trunk 13 after decomposition accesses the middle and lower part of tail gas washing column 4, be provided with scrubbing exhaust gas output tube 16 at the top of tail gas washing column 4, in tail gas washing column 4, the sodium phenolate solution of inputting from sodium phenolate solution input tube 5 sprays downwards, input with the waste gas delivery trunk 13 from decomposing, upwards after mobile decomposition, waste gas continues reaction, produce clean sodium phenolate solution, the clean sodium phenolate solution of producing enters decomposition process as raw material,
One side of a described decomposition tower 3 side by side install secondary decomposition tower 10 and three decomposition towers 11; Be provided with and CO in the middle and lower part of a decomposition tower 3
2the flue inlet branch 15a that the flue delivery trunk 14 of scavenging tower 2 Base top contacts is connected, flue is by the middle and lower part in a decomposition tower 3 of flue inlet branch 15a input; Access the input aperture of clean sodium phenolate solution conveyor tube 17 on the top of a decomposition tower 3, clean sodium phenolate solution is inputted the top in decomposition tower 3 one time by clean sodium phenolate solution conveyor tube 17, and sprays downwards, mixes and reacts with upwards mobile flue; Be provided with the waste gas output arm 12a after decomposition on the top of a decomposition tower 3, the waste gas output arm 12a after decomposition is connected with the waste gas delivery trunk 13 after decomposition; Be provided with and once decompose crude phenols output tube 18 in the bottom of a decomposition tower 3; Be provided with one time Na in the bottom of a decomposition tower 3
2cO
3solution output tube 20; The crude phenols that once decompose of producing in a decomposition tower 3 are input to the top in secondary decomposition tower 10 by once decomposing crude phenols output tube 18 again;
The middle and lower part of described secondary decomposition tower 10 is provided with and CO
2the flue inlet branch 15b that the flue delivery trunk 14 of scavenging tower 2 Base top contacts is connected, flue is by the middle and lower part in flue inlet branch 15b input secondary decomposition tower 10; The input aperture of once decomposing crude phenols output tube 18 is accessed on top at secondary decomposition tower 10, once decompose crude phenols and input the top in secondary decomposition tower 10 by once decomposing crude phenols output tube 18, and spray downwards, with from flue inlet branch 15b input and upwards mobile flue mix and react; Be provided with the waste gas output arm 12b after decomposition on the top of secondary decomposition tower 10, the waste gas output arm 12b after decomposition is connected with the waste gas delivery trunk 13 after decomposition; Be provided with secondary in the bottom of secondary decomposition tower 10 and decompose crude phenols output tube 19; Be provided with secondary Na in the bottom of secondary decomposition tower 10
2cO
3solution output tube 21; In waste gas input waste gas delivery trunk 13 after the interior decomposition of secondary decomposition tower 10; The secondary decomposition crude phenols of producing decompose crude phenols output tube 19 by secondary and input the top in decomposition tower 11 three times, and spray downwards, with decompose for the second time from flue inlet branch 15b input, upwards mobile flue, there is chemical reaction, make secondary and decompose crude phenols and secondary Na
2cO
3solution; The secondary decomposition crude phenols of producing decompose crude phenols output tube 19 by secondary again and are input to the top in decomposition tower 11 three times;
The middle and lower part of three times described decomposition towers 11 is provided with and CO
2the flue inlet branch 15c that the flue delivery trunk 14 of scavenging tower 2 Base top contacts is connected, flue is by the middle and lower part in three decomposition towers 11 of flue inlet branch 15c input; The input aperture of decomposing crude phenols output tube 19 at the top of three decomposition towers 11 access secondary, secondary decomposition crude phenols decompose crude phenols output tube 19 by secondary and input the top in decomposition tower 11 three times, and spray downwards, with from flue inlet branch 15c input and upwards mobile flue mix and react; Be provided with the waste gas output arm 12c after decomposition on the top of three decomposition towers 11, the waste gas output arm 12c after decomposition is connected with the waste gas delivery trunk 13 after decomposition; Be provided with three times in the bottom of three decomposition towers 11 and decompose crude phenols output tube 23; Be provided with three times Na in the bottom of three decomposition towers 11
2cO
3solution output tube 22; In waste gas input waste gas delivery trunk 13 after three interior decomposition of decomposition tower 11; The crude phenols that decompose for three times of producing are exported by three decomposition crude phenols output tubes 23, decompose crude phenols three times and are product.
As improvement of the present utility model: at CO
2the flue delivery trunk 14 of scavenging tower 2 Base top contacts is provided with blower fan 24, promotes CO by blower fan 24
2the conveying of the flue of scavenging tower 2.
Described clean sodium phenolate solution conveyor tube 17 is provided with medial launder 25.
A described Na
2cO
3solution output tube 20, secondary Na
2cO
3solution output tube 21 and three Na
2cO
3solution output tube 22 accesses same Na
2cO
3in solution storage trough.
Described once decomposition crude phenols output tube 18, secondary decomposes crude phenols output tube 19 and only on sodium phenolate solution conveyor tube 17, is equipped with transferpump 26.
On described once decomposition crude phenols output tube 18 and secondary decomposition crude phenols output tube 19, be equipped with medial launder, because current techique, so do not mark in figure.
Claims (5)
1. the clean three tower cascade connected CO of sodium phenolate
2decompose the device of producing crude phenols, comprise tube furnace (1), CO
2scavenging tower (2), a decomposition tower (3) and sodium phenolate solution input tube (5), flue gas output tube (6) the access CO of tube furnace (1)
2middle and lower part in scavenging tower (2), is characterized in that: described CO
2one side of scavenging tower (2) is provided with circulating pipe (7), is provided with water circulating pump (8) in the end section of circulating pipe (7), the upper end access CO of circulating pipe (7)
2top in scavenging tower (2) is provided with the communicating pipe (9) of accessing circulating water pool, at CO on circulating pipe (7)
2the top of scavenging tower (2) is provided with flue delivery trunk (14);
Top in described sodium phenolate solution input tube (5) access tail gas washing column (4), be provided with clean sodium phenolate solution conveyor tube (17) in the bottom of tail gas washing column (4), the middle and lower part of waste gas delivery trunk (13) the access tail gas washing column (4) after decomposition, is provided with scrubbing exhaust gas output tube (16) at the top of tail gas washing column (4);
One side of a described decomposition tower (3) side by side install secondary decomposition tower (10) and three decomposition towers (11); Middle and lower part at a decomposition tower (3) is provided with and CO
2the flue inlet branch (15a) that the flue delivery trunk (14) of scavenging tower (2) Base top contact is connected; Access the input aperture of clean sodium phenolate solution conveyor tube (17) on the top of a decomposition tower (3); Be provided with the waste gas output arm (12a) after decomposition on the top of a decomposition tower (3), the waste gas output arm (12a) after decomposition is connected with the waste gas delivery trunk (13) after decomposition; Be provided with and once decompose crude phenols output tube (18) in the bottom of a decomposition tower (3); Be provided with Na one time in the bottom of a decomposition tower (3)
2cO
3solution output tube (20);
The middle and lower part of described secondary decomposition tower (10) is provided with and CO
2the flue inlet branch (15b) that the flue delivery trunk (14) of scavenging tower (2) Base top contact is connected; Once decompose the input aperture of crude phenols output tube (18) in the access of the top of secondary decomposition tower (10); Be provided with the waste gas output arm (12b) after decomposition on the top of secondary decomposition tower (10), the waste gas output arm (12b) after decomposition is connected with the waste gas delivery trunk (13) after decomposition; Be provided with secondary in the bottom of secondary decomposition tower (10) and decompose crude phenols output tubes (19); Bottom at secondary decomposition tower (10) is provided with secondary Na
2cO
3solution output tube (21);
The middle and lower part of described three decomposition towers (11) is provided with and CO
2the flue inlet branch (15c) that the flue delivery trunk (14) of scavenging tower (2) Base top contact is connected; The input aperture of decomposing crude phenols output tubes (19) at the top of three decomposition towers (11) access secondary; Be provided with the waste gas output arm (12c) after decomposition on the top of three decomposition towers (11), the waste gas output arm (12c) after decomposition is connected with the waste gas delivery trunk (13) after decomposition; Be provided with three times in the bottom of three decomposition towers (11) and decompose crude phenols output tubes (23); Be provided with Na three times in the bottom of three decomposition towers (11)
2cO
3solution output tube (22).
2. the three tower cascade connected CO of clean sodium phenolate according to claim 1
2decompose the device of producing crude phenols, it is characterized in that: at CO
2the flue delivery trunk (14) of scavenging tower (2) Base top contact is provided with blower fan (24).
3. the described three tower cascade connected CO of clean sodium phenolate according to claim 1
2decompose the device of producing crude phenols, it is characterized in that: described described clean sodium phenolate solution conveyor tube (17) is provided with medial launder (25).
4. the described three tower cascade connected CO of clean sodium phenolate according to claim 1
2decompose the device of producing crude phenols, it is characterized in that: a described Na
2cO
3solution output tube (20), secondary Na
2cO
3solution output tube (21) and three Na
2cO
3solution output tube (22) accesses same Na
2cO
3in solution storage trough.
5. the described three tower cascade connected CO of clean sodium phenolate according to claim 1
2decompose the device of producing crude phenols, it is characterized in that: described once decomposition crude phenols output tubes (18), secondary decomposes crude phenols output tubes (19) and only on sodium phenolate solution conveyor tube (17), be equipped with transferpump (26).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420103706.6U CN203782059U (en) | 2014-03-10 | 2014-03-10 | Device for preparing crude carbolic acid from net phenol sodium salt employing three-tower series CO2 decomposition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420103706.6U CN203782059U (en) | 2014-03-10 | 2014-03-10 | Device for preparing crude carbolic acid from net phenol sodium salt employing three-tower series CO2 decomposition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203782059U true CN203782059U (en) | 2014-08-20 |
Family
ID=51318265
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420103706.6U Expired - Fee Related CN203782059U (en) | 2014-03-10 | 2014-03-10 | Device for preparing crude carbolic acid from net phenol sodium salt employing three-tower series CO2 decomposition |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203782059U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106495993A (en) * | 2016-10-18 | 2017-03-15 | 山西永东化工股份有限公司 | A kind of liquid CO 2 decomposes the production method of sodium phenolate co-production sodium carbonate |
| CN109456148A (en) * | 2018-12-14 | 2019-03-12 | 中冶焦耐(大连)工程技术有限公司 | It is a kind of to decompose net phenol sodium production crude phenols process system using flue gas of heating furnace |
| CN112521253A (en) * | 2020-12-18 | 2021-03-19 | 中冶焦耐(大连)工程技术有限公司 | Carbon dioxide decomposition system and process for sodium phenolate |
| CN113351139A (en) * | 2021-06-21 | 2021-09-07 | 天津辰力工程设计有限公司 | Equipment and method for producing crude phenol by decomposing sodium phenolate with sulfuric acid |
-
2014
- 2014-03-10 CN CN201420103706.6U patent/CN203782059U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106495993A (en) * | 2016-10-18 | 2017-03-15 | 山西永东化工股份有限公司 | A kind of liquid CO 2 decomposes the production method of sodium phenolate co-production sodium carbonate |
| CN106495993B (en) * | 2016-10-18 | 2019-03-05 | 山西永东化工股份有限公司 | A kind of liquid CO 2 decomposes the production method of sodium phenolate co-production sodium carbonate |
| CN109456148A (en) * | 2018-12-14 | 2019-03-12 | 中冶焦耐(大连)工程技术有限公司 | It is a kind of to decompose net phenol sodium production crude phenols process system using flue gas of heating furnace |
| CN112521253A (en) * | 2020-12-18 | 2021-03-19 | 中冶焦耐(大连)工程技术有限公司 | Carbon dioxide decomposition system and process for sodium phenolate |
| CN112521253B (en) * | 2020-12-18 | 2023-11-28 | 中冶焦耐(大连)工程技术有限公司 | Carbon dioxide decomposition system and process of sodium phenolate |
| CN113351139A (en) * | 2021-06-21 | 2021-09-07 | 天津辰力工程设计有限公司 | Equipment and method for producing crude phenol by decomposing sodium phenolate with sulfuric acid |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140820 Termination date: 20160310 |