CN101838542B - Manufacturing method of ultra-temperature pitch - Google Patents
Manufacturing method of ultra-temperature pitch Download PDFInfo
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- CN101838542B CN101838542B CN 201010175665 CN201010175665A CN101838542B CN 101838542 B CN101838542 B CN 101838542B CN 201010175665 CN201010175665 CN 201010175665 CN 201010175665 A CN201010175665 A CN 201010175665A CN 101838542 B CN101838542 B CN 101838542B
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Abstract
The invention relates to a manufacturing method of ultra-temperature pitch using coal pitch as a raw material, comprising the following steps of: a, evenly heating a medium-temperature liquid coal pitch raw material insulated at the temperature of 180 DEG C at the speed of 13-15 DEG C per hour and mixing by starting a mixing device when the temperature raises to 250 DEG C in a kettle; b, carrying out oxidation reaction when the temperature raises to 320 DEG C in the kettle and carrying out reduced pressure distillation after the distillate quantity is stable; c, when the temperature raises to 375+/-5 DEG C, stopping raising the temperature, maintaining the temperature, sampling, analyzing softening points until the softening points satisfy product requirements, wherein the total oxidation reaction time reaches 5-10 hours; stopping heating, introducing air and evacuating, discharging, and cooling to the normal temperature. The manufacturing method of ultra-temperature pitch can not cause local overheating concentration, leads aggregated molecules to have even distribution and stable quality, can produce high-temperature and ultra-temperature pitch according to requirements, shortens the production time, prolongs the service life of a device, and greatly improves the product quality.
Description
Technical field
The present invention relates to a kind of manufacture method of the ultra-temperature pitch take coal-tar pitch as raw material.
Background technology
Coal tar pitch raw material can produce the asphaltic products. of the mass parameter of different qualities by follow-up distillation treatment process, and is different according to the purposes of asphaltic products., and the parameter request of pitch also is not quite similar, and the softening temperature of its medium pitch is its key property parameter.Existing asphalt production process mainly contains the methods such as horizontal retort intermittent type atmospheric distillation, the continuous atmospheric distillation of tube furnace, horizontal retort decompression single flash method, these traditional technologys are mainly for the production of softening temperature lower middle temperature, modified pitch, the product softening temperature can only reach at most 120 ℃ usually, if produce the higher pitch of softening temperature, the defective such as these production technique just exist that the easy coking of Distallation systm equipment, obstruction, equipment are fragile, unstable product quality, asphaltic products. molecular distribution are difficult for evenly, need frequent clear still, seriously polluted.If produce the ultra-temperature pitch product of 170 ℃～320 ℃ of softening temperatures, then traditional production technique is difficult to realize.
Summary of the invention
Technical problem to be solved by this invention is, a kind of manufacture method that can produce high-quality, high softening-point and the uniform ultra-temperature pitch of molecular distribution is provided.
The manufacture method of ultra-temperature pitch of the present invention is passed through following steps successively:
A. will be incubated at 180 ℃ middle temperature liquid coal asphalt stock and send into upright still by the insulation delivery system, start electrical heating device, evenly heat up with per hour 13 ℃～15 ℃ speed, and open whipping device when temperature in the kettle rises to 250 ℃ and stir;
B. when temperature in the kettle rises to 320 ℃, open compressed air inlet valve, with per minute 1M
3The pressurized air of flow by pipeline even air inlet at the bottom of the still, make oxidizing reaction, carry out underpressure distillation after amount to be distillated is stable, the flow that vacuum pump vacuumizes during underpressure distillation is per minute 6～8M
3, the vacuum meter registration is not less than 0.9MPa;
C. when temperature in the kettle rises to 375 ± 5 ℃, stop to heat up and keeping temperature, begin to take a sample and the softening temperature analysis, until softening temperature satisfies product requirement and total oxidation time reaches 5～10 hours, stopped heating, stop air inlet, stop to vacuumize, open bleeder valve at the bottom of the still, close the distillation outlet, pass into compressed nitrogen, finished product pitch is pressed into receiver is cooled to normal temperature.
The present invention adopts vertical mechanical to stir, automatically controlledly adds thermal still, utilizes compressed air oxidation and stir, adopt vacuum distillation method simultaneously, make that material fully obtains stirring at high-temperature pressure-reduction card, the still wall is heated evenly, reacts completely, can not cause the local superheating coking, the molecular distribution that makes polymerization evenly, steady quality, can produce as requested the high temperature ultra-temperature pitch, the softening temperature of pitch reaches as high as 320 ℃; In addition owing to adopt machinery and pressurized air to stir and underpressure distillation, greatly shortened the production time, temperature in the kettle also can reduce about 20 ℃, work-ing life of extension device effectively, increase substantially quality product, can provide reliable hard pitch base mateiral for high-end products such as asphalt base carbon fibers.
Embodiment
The making method of embodiment of the invention system passes through following steps successively:
A. will be incubated at 180 ℃ middle temperature liquid coal asphalt stock and send into 13M by the insulation delivery system
3Upright still, advance real 12 tons, start electrical heating device, evenly heat up with 14 ℃ speed per hour, open whipping device when temperature in the kettle rises to 250 ℃ and stir;
B. when temperature in the kettle rises to 320 ℃, open compressed air inlet valve, with per minute 1M
3The pressurized air of flow by pipeline even air inlet at the bottom of the still, make oxidizing reaction, carry out underpressure distillation after amount to be distillated is stable, the flow that vacuum pump vacuumizes during underpressure distillation is per minute 8M
3, the vacuum meter registration is not less than 0.9MPa;
C. when temperature in the kettle rises to 375 ± 5 ℃, stop to heat up and keeping temperature, begin to take a sample and the softening temperature analysis, until softening temperature satisfies product requirement and total oxidation time is not less than 8 hours, stopped heating, stop air inlet, stop to vacuumize, open bleeder valve at the bottom of the still, close the distillation outlet, pass into compressed nitrogen, finished product pitch is pressed into receiver is cooled to normal temperature, packing, warehouse-in.
The asphaltic products. of 250 ℃ of softening temperatures that the embodiment of the invention is produced and 115 ℃, the asphaltic products. of its indices and traditional technology production is compared as follows:
Above data can find out that method of the present invention not only can be produced high-end product, even for the production of 115 ℃ of character asphaltic products.es, its quality product also is better than the product that traditional technology is produced.
Claims (1)
1. the manufacture method of a ultra-temperature pitch is characterized in that: pass through successively following steps,
A. will be incubated at 180 ℃ middle temperature liquid coal asphalt stock and send into upright still by the insulation delivery system, start electrical heating device, evenly heat up with per hour 13 ℃～15 ℃ speed, and open whipping device when temperature in the kettle rises to 250 ℃ and stir;
B. when temperature in the kettle rises to 320 ℃, open compressed air inlet valve, with per minute 1M
3The pressurized air of flow by pipeline even air inlet at the bottom of the still, make oxidizing reaction, carry out underpressure distillation after amount to be distillated is stable, the flow that vacuum pump vacuumizes during underpressure distillation is per minute 6～8M
3, the vacuum meter registration is not less than 0.9MPa;
C. when temperature in the kettle rises to 375 ± 5 ℃, stop to heat up and keeping temperature, begin to take a sample and the softening temperature analysis, until softening temperature satisfies product requirement and total oxidation time reaches 5～10 hours, stopped heating, stop air inlet, stop to vacuumize, open bleeder valve at the bottom of the still, close the distillation outlet, pass into compressed nitrogen, finished product pitch is pressed into receiver is cooled to normal temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010175665 CN101838542B (en) | 2010-05-19 | 2010-05-19 | Manufacturing method of ultra-temperature pitch |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010175665 CN101838542B (en) | 2010-05-19 | 2010-05-19 | Manufacturing method of ultra-temperature pitch |
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| Publication Number | Publication Date |
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| CN101838542A CN101838542A (en) | 2010-09-22 |
| CN101838542B true CN101838542B (en) | 2013-02-27 |
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| CN 201010175665 Active CN101838542B (en) | 2010-05-19 | 2010-05-19 | Manufacturing method of ultra-temperature pitch |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102363731B (en) * | 2011-06-30 | 2013-06-05 | 江苏国正新材料科技有限公司 | Method for increasing asphalt softening point |
| CN102732280B (en) * | 2012-07-09 | 2014-04-16 | 遇秉武 | High-softening-point coal-tar pitch production method |
| CN103805221B (en) * | 2012-11-07 | 2015-09-30 | 中国石油化工股份有限公司 | A kind of production method of high softening point bitumen |
| CN103805220B (en) * | 2012-11-07 | 2015-09-30 | 中国石油化工股份有限公司 | A kind of preparation method of high softening point bitumen |
| CN102965136B (en) * | 2012-12-14 | 2014-01-15 | 济宁碳素集团有限公司 | Production method of coal pitch |
| CN107488456A (en) * | 2017-07-31 | 2017-12-19 | 江苏天诺环境工程技术开发有限公司 | A kind of preparation method of high β resin modified asphalts |
| CN109504417A (en) * | 2017-09-14 | 2019-03-22 | 大连正邦新能源材料有限公司 | A kind of interphase can spin the production method and system of pitch |
| CN109181733B (en) * | 2018-09-30 | 2020-11-27 | 中国科学院山西煤炭化学研究所 | Method for preparing spinnable asphalt from coal tar pitch |
| CN109609164B (en) * | 2018-12-06 | 2021-03-23 | 程可先 | Method for blending fixed bed hydrogenation co-production refined soft asphalt of coal tar |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1415699A (en) * | 2001-10-30 | 2003-05-07 | 中国石油化工股份有限公司 | Method for oxidizing asphaltum |
| CN1970689A (en) * | 2006-12-13 | 2007-05-30 | 上海奥韦通工程技术有限公司 | Process for preparing modified asphalt |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05132675A (en) * | 1991-11-12 | 1993-05-28 | Osaka Gas Co Ltd | Production of pitch |
| US7067050B2 (en) * | 2002-11-14 | 2006-06-27 | Marathon Ashland Petroleum Llc | Petroleum hydrocarbon binder with reduced polycyclic aromatic hydrocarbon content |
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2010
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1415699A (en) * | 2001-10-30 | 2003-05-07 | 中国石油化工股份有限公司 | Method for oxidizing asphaltum |
| CN1970689A (en) * | 2006-12-13 | 2007-05-30 | 上海奥韦通工程技术有限公司 | Process for preparing modified asphalt |
Non-Patent Citations (3)
| Title |
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| JP特开平5-132675A 1993.05.28 |
| 张立科.氧化、蒸馏对沥青性能的影响研究.《中国优秀硕士学位论文全文数据库 工程科技II辑》.2009,(第6期),第31页. * |
| 许斌等.煤沥青氧化热聚合工艺的研究.《炭素技术》.2003,(第6期),第8-12页. * |
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| CN101838542A (en) | 2010-09-22 |
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Address after: 212000 Xue Village Industrial Zone, Shangdang Town, Dantu District, Zhenjiang, Jiangsu Patentee after: Zhenjiang Xinguang new Mstar Technology Ltd Address before: 212000 Xue Village Industrial Zone, Shangdang Town, Dantu District, Zhenjiang, Jiangsu Patentee before: Zhenjiang Xinguang Metallurgical Auxiliary Plant |