CN102021015B - Tar dissolving method for extracting C4 hydrocarbon and C5 hydrocarbon by using dimethylformamide as solvent - Google Patents
Tar dissolving method for extracting C4 hydrocarbon and C5 hydrocarbon by using dimethylformamide as solvent Download PDFInfo
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- CN102021015B CN102021015B CN 200910170271 CN200910170271A CN102021015B CN 102021015 B CN102021015 B CN 102021015B CN 200910170271 CN200910170271 CN 200910170271 CN 200910170271 A CN200910170271 A CN 200910170271A CN 102021015 B CN102021015 B CN 102021015B
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Abstract
The invention relates to a tar dissolving method for extracting C4 hydrocarbon and C5 hydrocarbon by using dimethylformamide as a solvent. The invention adopts a method for improving solvent operating temperature, expands the distillation range of a usable solvent, improves the flowability of tar in a pipeline and flow control and ensures that the dissolution of the tar and the feeding speed of the solvent are reasonably matched; and by adopting an anchor agitator, the stirring effect is strengthened, and the dissolving speed is improved. In addition, the tar discharge of the prior art adopts a manual way; and because the tar temperature is higher, an operating unsafe factor exists. An automatic stop valve controlled by a weight signal is added in the part; and when a waste rubber barrel is full, the valve is automatically opened and closed, and the safety and humanization of operation are improved.
Description
Technical field
The invention belongs to chemical field, be applicable to take dimethyl formamide as solvent extraction carbon four hydrocarbon, the tar dissolving method of carbon five hydrocarbon.
Background technology
Take dimethyl formamide as solvent extraction carbon four hydrocarbon, in the production process of carbon five hydrocarbon, because the chemical that adds in the extraction solvent causes the generation of tar, regularly discharge after therefore need to the tar in the solvent is concentrated.Existing process using will contain DMF (dimethyl formamide) heating of tar, and fresh DMF is isolated on the still top, discharge the method for tar at the bottom of the still, and tar is after the solvent cut dissolving, and barrelling is discharged.
CN1803764A discloses the renovation process of DMF behind a kind of carbon five extraction desorptions, for coking in the still that prevents from regenerating, when liquid is than thickness in observing the regeneration still, stops charging, begins to concentrate the switching of the still of regenerating simultaneously.
CN101397261A discloses a kind of renovation process of dimethylformamide as extracting solvent for cracking carbon 5, utilizes the effect of reactive distillation, has avoided the hydrolysis of extraction solvent dimethyl formamide.
The problem that above-mentioned prior art often runs into is exactly the blanking pipeline obstruction between solvent reclamation still and the tar dissolution kettle, and blanking is not smooth; Tar viscosity is large in the tar dissolution kettle, and oar formula mixing effect is paid no attention to the speed of thinking of dissolution time and solvent adding and do not mated the problem of dissolving vessel canful.
Summary of the invention
The problems such as tar exhausting line clogging of the solvent stripping process that exists for prior art, the invention provides a kind ofly be applicable to take dimethyl formamide as solvent extraction carbon four hydrocarbon, the tar dissolving method of carbon five hydrocarbon.
Of the present inventionly a kind ofly be applicable to take dimethyl formamide as solvent extraction carbon four hydrocarbon, the tar dissolving method of carbon five hydrocarbon is achieved in that
Of the present invention for take dimethyl formamide as solvent extraction carbon four hydrocarbon, the tar dissolving method of carbon five hydrocarbon, it is characterized in that the method comprises the steps:
A, from the solvent that contains tar of carbon four hydrocarbon, carbon five hydrocarbon extraction plants through solvent reclamation still 6 desolvations, tar is sent into tar dissolution kettle 5;
B, solvent 12 by after flow control 18 and the flow control 29, are sent into the entrance and exit of tar dissolution kettle 5 respectively successively after 3 heating of tar solvent heater;
C, contain tar solvent 13 after 6 regeneration of solvent reclamation still, the top obtains fresh solvent 12 and recycles, regeneration still bottom obtains tar and sends in the tar dissolution kettle 5 and enter tar solution gathering barrel 7 after the dissolving.
In concrete operations,
The service temperature of described tar solvent heater 3 is 60-120 ℃; Experiment shows, under this temperature, the dissolution rate of tar in solvent is best.
The flow control scope of described flow control 18 is 0.5-5m
3/ h, this flow prevent that tar from solidifying in pipeline; The flow control scope of flow control 29 is 0.2-1m
3/ h, this flow prevent that tar from solidifying in pipeline.
Described solvent is the solvent of boiling range 80-350 ℃ one-component or blending ingredients, such as carbon eight hydrocarbon mixtures or carbon 12 hydrocarbon mixtures or carbon seven hydrocarbon and carbon nine hydrocarbon mixtures; Toluene is specifically arranged; Dimethylbenzene; Carbon 12 straight chains or branched alkane etc.
Tar emission pipeline between described tar dissolution kettle 5 and the solvent reclamation still 6 and vertical line angle are less than 30 degree;
Described tar dissolution kettle 5 adopts anchor stirrer, and agitator adopts speed regulation device, and speed is 0-150 rev/min;
Described tar solution gathering barrel 7 arranges the automatic switch valve 11 of barrel poidometer 10 signal control.
Because These characteristics of the present invention, of the present invention have advantages of following very outstanding:
1) increases tar solvent heater, raising solvent service temperature, improved tar in ducted flowability;
2) enlarged the boiling range scope that to use solvent;
3) increase flow control, make the dissolving of tar and solvent feed speeds match reasonable;
4) adopt anchor stirrer, strengthen mixing effect, improve dissolution rate, accelerate the tar dissolving;
5) existing process tars is discharged and is adopted manual mode, because the tar temperature is higher, the operation unsafe factor is arranged.The present invention is at the gain in weight automatic stop valve of signal control of this part, and when the scrap rubber barreled was full, automatic switch valve increased security and the hommization of operation.
Description of drawings
The schematic flow sheet of Fig. 1 the inventive method
Embodiment
As shown in Figure 1
Embodiment
Of the present invention for take dimethyl formamide as solvent extraction carbon four hydrocarbon, the tar dissolving method of carbon five hydrocarbon comprises the steps:
A, will be from the solvent that contains tar of carbon four hydrocarbon, carbon five hydrocarbon extraction plants through solvent reclamation still 6 desolvations, tar is sent into tar dissolution kettle 5;
B, solvent 12 by after flow control 18 and the flow control 29, are sent into the entrance and exit of tar dissolution kettle 5 respectively successively after 3 heating of tar solvent heater;
C, contain tar solvent 13 after 6 regeneration of solvent reclamation still, the top obtains fresh solvent 12 and recycles, regeneration still bottom obtains tar and sends in the tar dissolution kettle 5 and enter tar solution gathering barrel 7 after the dissolving.
The service temperature of described tar solvent heater 3 is 80-100 ℃; Experiment shows, under this temperature, the dissolution rate of tar in solvent is best.
The flow control scope of described flow control 18 is 0.5-5m
3/ h, this flow prevent that tar from solidifying in pipeline; The flow control scope of flow control 29 is 0.2-1m
3/ h, this flow prevent that tar from solidifying in pipeline.
Described solvent is boiling range 80-350 ℃ dimethyl formamide;
Tar emission pipeline between described tar dissolution kettle 5 and the solvent reclamation still 6 and vertical line angle are 10 degree;
Described tar dissolution kettle 5 adopts anchor stirrer, and agitator adopts speed regulation device, and speed is 0-150 rev/min;
Described tar solution gathering barrel 7 arranges the automatic switch valve 11 of barrel poidometer 10 signal control.
Claims (5)
- One kind be used for take dimethyl formamide as solvent extraction carbon four hydrocarbon, the tar dissolving method of carbon five hydrocarbon, it is characterized in that the method comprises the steps:A, contain tar from carbon four hydrocarbon, carbon five hydrocarbon extraction plants solvent through solvent reclamation still (6) desolvation, tar is sent into tar dissolution kettle (5);B, solvent (12) by after flow control 1 (8) and the flow control 2 (9), are sent into the entrance and exit of tar dissolution kettle (5) respectively successively after tar solvent heater (3) heating;C, contain tar solvent (13) after solvent reclamation still (6) regeneration, the top obtains fresh solvent (14) and recycles, and regeneration still bottom obtains entering tar solution gathering barrel (7) after tar is sent into the middle dissolving of tar dissolution kettle (5);Described solvent is the solvent of boiling range 80-350 ℃ one-component or blending ingredients;Tar emission pipeline between described tar dissolution kettle (5) and the solvent reclamation still (6) and vertical line angle are less than 30 degree;Described tar dissolution kettle (5) adopts anchor stirrer, and agitator adopts speed regulation device, and speed is 0-150 rev/min.
- 2. according to claim 1ly a kind ofly be applicable to take dimethyl formamide as solvent extraction carbon four hydrocarbon, the tar dissolving method of carbon five hydrocarbon, it is characterized in that:The service temperature of described tar solvent heater (3) is 60-120 ℃.
- 3. according to claim 1ly a kind ofly be applicable to take dimethyl formamide as solvent extraction carbon four hydrocarbon, the tar dissolving method of carbon five hydrocarbon, it is characterized in that:The flow control scope of described flow control 1 (8) is 0.5-5m 3/ h; The flow control scope of flow control 2 (9) is 0.2-1m 3/ h.
- 4. according to claim 1ly a kind ofly be applicable to take dimethyl formamide as solvent extraction carbon four hydrocarbon, the tar dissolving method of carbon five hydrocarbon, it is characterized in that:Described tar solution gathering barrel (7) arranges the automatic switch valve (11) of a barrel poidometer (10) signal control.
- 5. according to claim 2ly a kind ofly be applicable to take dimethyl formamide as solvent extraction carbon four hydrocarbon, the tar dissolving method of carbon five hydrocarbon, it is characterized in that:The service temperature of described tar solvent heater (3) is 80-100 ℃;The flow control scope of described flow control 1 (8) is 0.5-5m 3/ h; The flow control scope of flow control 2 (9) is 0.2-1m 3/ h;Described solvent is the solvent of boiling range 80-350 ℃ one-component or blending ingredients;Tar emission pipeline between described tar dissolution kettle (5) and the solvent reclamation still (6) and vertical line angle are less than 30 degree;Described tar dissolution kettle (5) adopts anchor stirrer, and agitator adopts speed regulation device, and speed is 0-150 rev/min;Described tar solution gathering barrel (7) arranges the automatic switch valve (11) of a barrel poidometer (10) signal control.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200910170271 CN102021015B (en) | 2009-09-10 | 2009-09-10 | Tar dissolving method for extracting C4 hydrocarbon and C5 hydrocarbon by using dimethylformamide as solvent |
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| CN 200910170271 CN102021015B (en) | 2009-09-10 | 2009-09-10 | Tar dissolving method for extracting C4 hydrocarbon and C5 hydrocarbon by using dimethylformamide as solvent |
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| CN102021015A CN102021015A (en) | 2011-04-20 |
| CN102021015B true CN102021015B (en) | 2013-05-01 |
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Citations (10)
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|---|---|---|---|---|
| US4134795A (en) * | 1978-04-05 | 1979-01-16 | The Goodyear Tire & Rubber Company | Acetylenes removal from diolefin streams by extractive distillation |
| JP2002363150A (en) * | 2001-06-01 | 2002-12-18 | Kanegafuchi Chem Ind Co Ltd | Method and apparatus for separating acetic acid and dimethylformamide by distillation |
| CN101244976A (en) * | 2007-02-15 | 2008-08-20 | 中国石油化工股份有限公司 | Method for producing polymerization level isoprene |
| CN101244975A (en) * | 2007-02-15 | 2008-08-20 | 中国石油化工股份有限公司 | Method for producing polymerization level isoprene with one-section abstraction combined azeotropy distillation |
| CN101244974A (en) * | 2007-02-15 | 2008-08-20 | 中国石油化工股份有限公司 | Method for one-section abstraction distillation separation cracking carbon 5-cut fraction |
| CN101302135A (en) * | 2007-05-11 | 2008-11-12 | 中国石油化工股份有限公司 | Method for separating isoprene by front-end hydrogenation one-stage extraction |
| CN101302134A (en) * | 2007-05-11 | 2008-11-12 | 中国石油化工股份有限公司 | Method for separating cracked carbon-5 fraction by front-end alkyne removal one-stage extraction |
| CN101434556A (en) * | 2007-11-16 | 2009-05-20 | 中国石油化工股份有限公司 | Regeneration method of C5 fraction extracting solvent N,N-dimethylformamide |
| CN101450909A (en) * | 2007-12-07 | 2009-06-10 | 中国石油化工股份有限公司 | Segregation and fractionation regeneration method of dimethylformamide as extracting solvent for cracking carbon 5 |
| CN101450908A (en) * | 2007-12-07 | 2009-06-10 | 中国石油化工股份有限公司 | Fractional condensation and regeneration method of dimethylformamide as extracting solvent for cracking carbon 5 |
-
2009
- 2009-09-10 CN CN 200910170271 patent/CN102021015B/en active Active
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| US4134795A (en) * | 1978-04-05 | 1979-01-16 | The Goodyear Tire & Rubber Company | Acetylenes removal from diolefin streams by extractive distillation |
| JP2002363150A (en) * | 2001-06-01 | 2002-12-18 | Kanegafuchi Chem Ind Co Ltd | Method and apparatus for separating acetic acid and dimethylformamide by distillation |
| CN101244976A (en) * | 2007-02-15 | 2008-08-20 | 中国石油化工股份有限公司 | Method for producing polymerization level isoprene |
| CN101244975A (en) * | 2007-02-15 | 2008-08-20 | 中国石油化工股份有限公司 | Method for producing polymerization level isoprene with one-section abstraction combined azeotropy distillation |
| CN101244974A (en) * | 2007-02-15 | 2008-08-20 | 中国石油化工股份有限公司 | Method for one-section abstraction distillation separation cracking carbon 5-cut fraction |
| CN101302135A (en) * | 2007-05-11 | 2008-11-12 | 中国石油化工股份有限公司 | Method for separating isoprene by front-end hydrogenation one-stage extraction |
| CN101302134A (en) * | 2007-05-11 | 2008-11-12 | 中国石油化工股份有限公司 | Method for separating cracked carbon-5 fraction by front-end alkyne removal one-stage extraction |
| CN101434556A (en) * | 2007-11-16 | 2009-05-20 | 中国石油化工股份有限公司 | Regeneration method of C5 fraction extracting solvent N,N-dimethylformamide |
| CN101450909A (en) * | 2007-12-07 | 2009-06-10 | 中国石油化工股份有限公司 | Segregation and fractionation regeneration method of dimethylformamide as extracting solvent for cracking carbon 5 |
| CN101450908A (en) * | 2007-12-07 | 2009-06-10 | 中国石油化工股份有限公司 | Fractional condensation and regeneration method of dimethylformamide as extracting solvent for cracking carbon 5 |
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| 燕化DMF抽提丁二烯技术改造;黎宗坚;《合成橡胶工业》;19970515;第20卷(第03期);135-137 * |
| 黎宗坚.燕化DMF抽提丁二烯技术改造.《合成橡胶工业》.1997,第20卷(第03期),135-137. |
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Address after: 100728 Beijing, Chaoyangmen, North Street, No. 22, No. Applicant after: China Petrochemical Group Corp. Co-applicant after: Sinopec Engineering Incorporation Address before: 100728 Beijing, Chaoyangmen, North Street, No. 22, No. Applicant before: China Petrochemical Group Corp. Co-applicant before: Engrg Construction Co., SINOPEC |
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Address after: 100728 No. 22 North Main Street, Chaoyang District, Beijing, Chaoyangmen Patentee after: SINOPEC Group Patentee after: Sinopec Engineering Construction Co., Ltd Address before: 100728 No. 22 North Main Street, Chaoyang District, Beijing, Chaoyangmen Patentee before: CHINA PETROLEUM & CHEMICAL Corp. Patentee before: Sinopec Engineering Construction Co., Ltd |
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