CN101475820A - Purification method for coal pitch - Google Patents

Purification method for coal pitch Download PDF

Info

Publication number
CN101475820A
CN101475820A CNA200910077570XA CN200910077570A CN101475820A CN 101475820 A CN101475820 A CN 101475820A CN A200910077570X A CNA200910077570X A CN A200910077570XA CN 200910077570 A CN200910077570 A CN 200910077570A CN 101475820 A CN101475820 A CN 101475820A
Authority
CN
China
Prior art keywords
pitch
solvent
coal
purifying
temperature
Prior art date
Application number
CNA200910077570XA
Other languages
Chinese (zh)
Inventor
熊杰明
葛明兰
翟彦青
高俊斌
Original Assignee
北京石油化工学院
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 北京石油化工学院 filed Critical 北京石油化工学院
Priority to CNA200910077570XA priority Critical patent/CN101475820A/en
Priority claimed from CN200910147687.0A external-priority patent/CN101787298B/en
Publication of CN101475820A publication Critical patent/CN101475820A/en

Links

Abstract

The invention relates to a method for purifying coal tar pitch, which is characterized in that the method comprises the following steps: using mid-temperature coal tar pitch or coal tar maltha as a raw material, and using a mixed solvent consisting of arene from coking and coal oil or light diesel fuel from petrifaction to perform sufficient mixing and dissolving at certain temperature; performing centrifugal separation to remove the residue, and distilling the obtained clear solution to remove and reclaim the solvent so as to obtain the purified pitch with the content of quinoline undissolved substances of between 0.01 and 0.04 percent. The method has the advantages of simple process, low production cost, high separation efficiency and lower QI content; besides, the purified pitch can completely meet the requirements on producing the products of needle coke, carbon fiber and the like.

Description

A kind of purifying method of coal-tar pitch
Technical field
The present invention relates to a kind of purifying method of coal-tar pitch, belong to coal-tar pitch deep processing field.
Background technology
China's coal-tar pitch resource is very abundant, but utilizes mainly as medium temperature coal pitch, modified pitch, fuel wet goods primary product at present, and added value is low, serious waste of resources.In fact, medium temperature coal pitch or coal tar soft asphalt aromaticity content height are the important source material of high value added products such as needle coke, charcoal fiber.Problem is, prepares this class high value added product, must at first thoroughly remove quinoline insolubles (QI) wherein.At present, very immature about the removing process of quinoline insolubles in the coal-tar pitch.Disclosing with medium temperature coal pitch or coal tar soft asphalt as patent documentation CN101289625 is raw material, utilizes aliphatic solvents and aromatic hydrocarbon solvent preparation mixed solvent, carries out extracting and separate in extraction tower, removes the method for the quinoline insolubles in the pitch.Because the QI particle in the pitch is very thin, the heavy phase that is rich in the QI residue is little with the light density difference between mutually that is rich in purifying pitch, and very slow by gravity settling speed, efficient is low, must employing higher extraction tower, bigger tower diameter; Perhaps adopt higher temperature, just can reach enough separating effects to reduce system viscosity.It is very limited that all things considered, settling process remove the effect of QI, and QI content can not effectively be reduced to 0.01%.In addition, do not provide the concrete title or the characteristics of aliphatic hydrocarbon in this patent yet.In fact, in petroleum cuts or product, the pure fat hydrocarbon that is suitable for doing solvent seldom, price is also very expensive.
Patent documentation CN101294090 discloses the centrifugal purification method of coal-tar pitch, but operation at normal temperatures, temperature is too low, and solvent is very low to the bituminous dissolving power, must use a large amount of solvents, and it is high to handle load, and equipment is huge, and the solvent recuperation energy consumption is very high; Use the single component solvent, the QI particle is not had throwing out, centrifugal effect is limited, must further handle by the Filters of 0.02~0.8 μ m, and process is very complicated.
Summary of the invention
Purpose of the present invention is just in order to overcome the shortcoming and deficiency that exists in the prior art, and provide a kind of purifying method of coal-tar pitch, thereby can obtain quinoline insolubles content and be 0.01~0.04% purifying pitch, satisfy the needs of making needle coke, charcoal fiber product, simplified technological process simultaneously, reduced process cost.
The objective of the invention is to realize by following technical proposal:
A kind of purifying method of coal-tar pitch, it is undertaken by following step:
With medium temperature coal pitch or coal tar soft asphalt is raw material, the coal-tar pitch raw material is fully stirred under 80~90 ℃ of temperature with solvent respectively and mix, pitch is fully dissolved, solvent and bituminous mass ratio are 0.9~2.0:1, centrifugation is carried out in pitch dissolving back under 80~90 ℃ of temperature, tail is abandoned residue, and the gained clear liquid distills, after removing and reclaiming solvent, can obtain quinoline insolubles content and be 0.01~0.04% purifying pitch.
The mixed solvent of described solvent for forming from pyrogenic aromatic hydrocarbons and kerosene or solar oil;
Described can be washing oil, removal phenol carbolic oil from pyrogenic aromatic hydrocarbons.
The solvent aromatic hydrocarbons of described coal tar soft asphalt and the mass ratio of kerosene or solar oil are 0.6~1.0:1, and solvent and bituminous mass ratio are 0.9~1.5:1.
The solvent aromatic hydrocarbons of described medium temperature coal pitch and the mass ratio of kerosene or solar oil are 0.8~1.5:1, and solvent and bituminous mass ratio are 1.0~2.0:1.
Method of the present invention is that the raw material of medium temperature coal pitch or coal tar soft asphalt and solvent are being carried out centrifugation after the dissolving under 80~90 ℃ of temperature again.This temperature is existing serialization industry centrifugal normal working temperature, owing to improved service temperature, improved solvent greatly to the bituminous dissolving power, pass through centrifugal separation technique again, make QI particulate settling velocity can reach more than 3000 times of gravity settling, disengaging time can shorten greatly, separation efficiency significantly improves, and the many small-particles that can't remove by sedimentation techniques, can well remove by centrifugal method, make on the bituminous decontamination effect improving class, further reduced QI content; Because the volume of whizzer is significantly less than large-scale sedimentation or extractor, the volume of separating device also significantly dwindles, and has promptly shortened disengaging time; Adopt mixed solvent, make between the primary QI particle and flocculate into macrobead mutually, thereby quicken settling process, significantly improved separating effect, avoided using thereafter loaded down with trivial details filtration procedure; Adopt solvent widely, needn't adopt expensive solvent such as simple aliphatic hydrocarbon, benzene, quinoline, make up with corresponding aromatic hydrocarbons based on the solvent of alkane and adopt as kerosene, solar oil class, can reach good effect, purifying back quinoline insolubles content is 0.01%.
Owing to take technique scheme to make the technology of the present invention and oneself have technology to compare to have technology simple, production cost is low, the separation efficiency height, and advantage that QI content is lower and effect, the pitch after purifying satisfies the needs of products such as making needle coke, charcoal fiber fully.
Embodiment
Following embodiment is further specified the present invention, but the present invention is not only limited to these embodiment.
Embodiment 1
Coal tar soft asphalt 150g and washing oil 56g, kerosene 94g are fully stirred and mixing under 80 ℃ of temperature, pitch is fully dissolved, centrifugation 4min under 4000rpm, 80 ℃ of temperature then, tail is abandoned residue, gained filtrate is distilled, after removing solvent, can obtain quinoline insolubles content and be 0.01% purifying pitch.
Embodiment 2
Coal tar soft asphalt 150g and washing oil 56g, kerosene 79g are fully stirred and mixing under 85 ℃ of temperature, pitch is fully dissolved, centrifugation 4min under 4000rpm, 85 ℃ of temperature then, tail is abandoned residue, gained filtrate is distilled, after removing solvent, can obtain quinoline insolubles content and be 0.01% purifying pitch.
Embodiment 3
Tar viscid bitumen 150g and washing oil 107g, kerosene 118g are fully stirred and mixing under 90 ℃ of temperature, pitch is fully dissolved, centrifugation 4min under 4000rpm, 90 ℃ of temperature then, tail is abandoned residue, gained filtrate is distilled, after removing solvent, can obtain quinoline insolubles content and be 0.01% purifying pitch.
Embodiment 4
Tar viscid bitumen 150g and removal phenol carbolic oil 112.5g, solar oil 112.5g are fully stirred and mixing under 85 ℃ of temperature, pitch is fully dissolved, centrifugation 4min under 4000rpm, 85 ℃ of temperature then, tail is abandoned residue, gained filtrate is distilled, after removing solvent, can obtain quinoline insolubles content and be 0.04% purifying pitch.
Embodiment 5
Medium temperature coal pitch 150g and washing oil 75g, kerosene 75g are fully stirred and mixing under 85 ℃ of temperature, pitch is fully dissolved, centrifugation 4min under 4000rpm, 85 ℃ of temperature then, tail is abandoned residue, gained filtrate is distilled, after removing solvent, can obtain quinoline insolubles content and be 0.01% purifying pitch.
Embodiment 6
Medium temperature coal pitch 150g and washing oil 135g, kerosene 90g are fully stirred and mixing under 80 ℃ of temperature, pitch is fully dissolved, centrifugation 4min under 4000rpm, 80 ℃ of temperature then, tail is abandoned residue, gained filtrate is distilled, after removing solvent, can obtain quinoline insolubles content and be 0.01% purifying pitch.
Embodiment 7
Medium temperature coal pitch 100g and washing oil 89g, solar oil 111g are fully stirred and mixing under 90 ℃ of temperature, pitch is fully dissolved, centrifugation 4min under 4000rpm, 90 ℃ of temperature then, tail is abandoned residue, gained filtrate is distilled, after removing solvent, can obtain quinoline insolubles content and be 0.01% purifying pitch.
Embodiment 8
Medium temperature coal pitch 200g and removal phenol carbolic oil 135g, solar oil 90g are fully stirred and mixing under 90 ℃ of temperature, pitch is fully dissolved, centrifugation 4min under 4000rpm, 90 ℃ of temperature then, tail is abandoned residue, gained filtrate is distilled, after removing solvent, can obtain quinoline insolubles content and be 0.04% purifying pitch.

Claims (4)

1, a kind of purifying method of coal-tar pitch, it is characterized in that it is undertaken by following step: with medium temperature coal pitch or coal tar soft asphalt is raw material, the coal-tar pitch raw material is fully stirred under 80~90 ℃ of temperature with solvent respectively and mix, pitch is fully dissolved, solvent and bituminous mass ratio are 0.9~2.0:1, centrifugation is carried out in pitch dissolving back under 80~90 ℃ of temperature, tail is abandoned residue, the gained clear liquid distills, after removing and reclaiming solvent, can obtain quinoline insolubles content and be 0.01~0.04% purifying pitch;
The mixed solvent of described solvent for forming from pyrogenic aromatic hydrocarbons and kerosene or solar oil.
2, purifying method according to claim 1 is characterized in that described can be washing oil, removal phenol carbolic oil from pyrogenic aromatic hydrocarbons.
3, purifying method according to claim 1 is characterized in that the solvent aromatic hydrocarbons of described coal tar soft asphalt and the mass ratio of kerosene or solar oil are 0.6~1.0:1, and solvent and bituminous mass ratio are 0.9~1.5:1.
4, purifying method according to claim 1 is characterized in that the solvent aromatic hydrocarbons of described medium temperature coal pitch and the mass ratio of kerosene or solar oil are 0.8~1.5:1, and solvent and bituminous mass ratio are 1.0~2.0:1.
CNA200910077570XA 2009-01-23 2009-01-23 Purification method for coal pitch CN101475820A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNA200910077570XA CN101475820A (en) 2009-01-23 2009-01-23 Purification method for coal pitch

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CNA200910077570XA CN101475820A (en) 2009-01-23 2009-01-23 Purification method for coal pitch
CN200910147687.0A CN101787298B (en) 2009-01-23 2009-06-12 Coal art pitch purification method

Publications (1)

Publication Number Publication Date
CN101475820A true CN101475820A (en) 2009-07-08

Family

ID=40836597

Family Applications (1)

Application Number Title Priority Date Filing Date
CNA200910077570XA CN101475820A (en) 2009-01-23 2009-01-23 Purification method for coal pitch

Country Status (1)

Country Link
CN (1) CN101475820A (en)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101798515A (en) * 2010-02-26 2010-08-11 辽宁科技大学 Process for co-production of high-quality carbon black raw oil, refined asphalt and binder asphalt
CN101824329A (en) * 2010-05-17 2010-09-08 朱兴建 Novel process for eliminating quinoline insoluble substances in coal tar medium temperature pitch
CN101880542A (en) * 2010-06-24 2010-11-10 山西潞安环保能源开发股份有限公司 Method for removing organic sulfur in coal pitch
CN101993704A (en) * 2009-08-21 2011-03-30 上海宝钢化工有限公司 Method for removing quinoline insoluble substances in coal tar pitch
CN102492452A (en) * 2011-11-28 2012-06-13 韩国清 Method for preparing high-purity dipping asphalt
CN102703104A (en) * 2012-06-21 2012-10-03 遇秉武 Production method for low-QI (Quality Index) coal pitch
CN102732280A (en) * 2012-07-09 2012-10-17 遇秉武 High-softening-point coal-tar pitch production method
CN103013548A (en) * 2012-12-07 2013-04-03 江苏博特新材料有限公司 Method for recovery of asphalt from asphalt mixture
CN103013566A (en) * 2011-09-23 2013-04-03 北京三聚创洁科技发展有限公司 Technology for preparing needle coke raw material from coal-tar pitch
CN103059893A (en) * 2013-01-14 2013-04-24 太原理工大学 Method for preparing mesophase pitch by utilizing electrochemical catalysis
CN103205272A (en) * 2012-01-12 2013-07-17 易高环保能源研究院有限公司 Method for production of purified coal tar pitch from high temperature coal tar
CN103509573A (en) * 2012-06-19 2014-01-15 北京宝塔三聚能源科技有限公司 Process for preparing high-quality coal-series needle-coke
CN103965932A (en) * 2014-04-30 2014-08-06 上海宝聚新化能源科技有限公司 Treatment method for mixed asphalt as raw material for preparing needle coke
CN104232130A (en) * 2013-06-09 2014-12-24 任相坤 Process of producing needle coke
CN105001892A (en) * 2015-07-17 2015-10-28 程志宇 Method for co-production of refined maltha through fixed bed-based coal-tar hydrogenation process
WO2016073541A1 (en) * 2014-11-06 2016-05-12 Uop Llc Processes for producing deashed pitch
CN106753545A (en) * 2016-12-08 2017-05-31 辽宁石油化工大学 A kind of process of coal tar processing modification
CN110317624A (en) * 2019-08-08 2019-10-11 平顶山东晟高科实业有限公司 A kind of method of pitch removing QI
CN110607186A (en) * 2014-10-17 2019-12-24 Oci有限公司 Preparation method of high-purity asphalt
CN111218294A (en) * 2018-11-27 2020-06-02 宝武炭材料科技有限公司 Method for purifying quinoline insoluble coal-series asphalt with high softening point and high softening point

Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101993704A (en) * 2009-08-21 2011-03-30 上海宝钢化工有限公司 Method for removing quinoline insoluble substances in coal tar pitch
CN101798515B (en) * 2010-02-26 2012-08-08 辽宁科技大学 Process for co-production of high-quality carbon black raw oil, refined asphalt and binder asphalt
CN101798515A (en) * 2010-02-26 2010-08-11 辽宁科技大学 Process for co-production of high-quality carbon black raw oil, refined asphalt and binder asphalt
CN101824329A (en) * 2010-05-17 2010-09-08 朱兴建 Novel process for eliminating quinoline insoluble substances in coal tar medium temperature pitch
CN101880542A (en) * 2010-06-24 2010-11-10 山西潞安环保能源开发股份有限公司 Method for removing organic sulfur in coal pitch
CN101880542B (en) * 2010-06-24 2013-01-23 山西潞安环保能源开发股份有限公司 Method for removing organic sulfur in coal pitch
CN103013566A (en) * 2011-09-23 2013-04-03 北京三聚创洁科技发展有限公司 Technology for preparing needle coke raw material from coal-tar pitch
CN103013566B (en) * 2011-09-23 2015-08-05 北京宝塔三聚能源科技有限公司 A kind of technique utilizing coal-tar pitch to prepare needle-shape coke raw material
CN102492452A (en) * 2011-11-28 2012-06-13 韩国清 Method for preparing high-purity dipping asphalt
CN103205272A (en) * 2012-01-12 2013-07-17 易高环保能源研究院有限公司 Method for production of purified coal tar pitch from high temperature coal tar
CN103205272B (en) * 2012-01-12 2017-03-01 易高环保能源研究院有限公司 High temperature coal-tar produces the method purifying coal tar asphalt
CN103509573A (en) * 2012-06-19 2014-01-15 北京宝塔三聚能源科技有限公司 Process for preparing high-quality coal-series needle-coke
CN103509573B (en) * 2012-06-19 2015-04-01 北京宝塔三聚能源科技有限公司 Process for preparing high-quality coal-series needle-coke
CN102703104B (en) * 2012-06-21 2013-12-04 遇秉武 Production method for low-QI (Quality Index) coal pitch
CN102703104A (en) * 2012-06-21 2012-10-03 遇秉武 Production method for low-QI (Quality Index) coal pitch
CN102732280A (en) * 2012-07-09 2012-10-17 遇秉武 High-softening-point coal-tar pitch production method
CN102732280B (en) * 2012-07-09 2014-04-16 遇秉武 High-softening-point coal-tar pitch production method
CN103013548B (en) * 2012-12-07 2014-08-06 江苏苏博特新材料股份有限公司 Method for recovery of asphalt from asphalt mixture
CN103013548A (en) * 2012-12-07 2013-04-03 江苏博特新材料有限公司 Method for recovery of asphalt from asphalt mixture
CN103059893A (en) * 2013-01-14 2013-04-24 太原理工大学 Method for preparing mesophase pitch by utilizing electrochemical catalysis
CN104232130A (en) * 2013-06-09 2014-12-24 任相坤 Process of producing needle coke
CN104232130B (en) * 2013-06-09 2016-08-10 任相坤 A kind of production technology of needle coke
CN103965932B (en) * 2014-04-30 2016-02-10 上海宝聚新化能源科技有限公司 As the treatment process of the mix asphalt of needle-shape coke raw material
CN103965932A (en) * 2014-04-30 2014-08-06 上海宝聚新化能源科技有限公司 Treatment method for mixed asphalt as raw material for preparing needle coke
CN110607186A (en) * 2014-10-17 2019-12-24 Oci有限公司 Preparation method of high-purity asphalt
WO2016073541A1 (en) * 2014-11-06 2016-05-12 Uop Llc Processes for producing deashed pitch
CN105001892A (en) * 2015-07-17 2015-10-28 程志宇 Method for co-production of refined maltha through fixed bed-based coal-tar hydrogenation process
CN105001892B (en) * 2015-07-17 2017-05-24 程志宇 Method for co-production of refined maltha through fixed bed-based coal-tar hydrogenation process
CN106753545A (en) * 2016-12-08 2017-05-31 辽宁石油化工大学 A kind of process of coal tar processing modification
CN111218294A (en) * 2018-11-27 2020-06-02 宝武炭材料科技有限公司 Method for purifying quinoline insoluble coal-series asphalt with high softening point and high softening point
CN110317624A (en) * 2019-08-08 2019-10-11 平顶山东晟高科实业有限公司 A kind of method of pitch removing QI

Similar Documents

Publication Publication Date Title
CN1257252C (en) Method for directly liquefying coal
CN101580729B (en) Method for preparing mesophase asphalt by coal liquefaction residue
CN103205271B (en) Hydrogenation of high temperature coal tar produces the method for mesophase pitch
CN102627381B (en) Two-step method resource treatment process for sludge containing oil
US8226816B2 (en) Method of producing synthetic pitch
CN1067098C (en) Solvated mesophase pitch having substantial quinoline-insoluble content
CN101511977B (en) Method for production of ashless coal
CN102942945B (en) Preparation method of soluble mesophase pitch
CN101565649B (en) Method for reclaiming silicon chip cutting fluid
CN102399564B (en) System and method for treating coal direct liquefaction residue
TWI441909B (en) Extraction of hydrocarbons from hydrocarbon-containing materials
CN103979757B (en) Method for treating oily sludge through multistage extraction-splitting coupling of supercritical fluid
CN102373108B (en) Process method for producing base oil by regenerating waste lubricating oil
CN100486665C (en) Oil soil treatment technique for tank cleaning
CN102796547B (en) Biological asphalt, biological asphalt composition and preparation method
CN104178202B (en) Oil-sand extraction and separation technology method
CN103614153B (en) Preparation method of polycondensed asphalt, preparation method of needle coke and needle coke
CN101294090B (en) Fine purification method for coal tar pitch
CN102010741A (en) Method for directly liquefying coals with function of maximizing utilization of liquefied residues
CN103204501B (en) Prepared the method for active carbon by the rich carbon residue of high temperature coal-tar or coal tar asphalt
TW201204824A (en) Novel hydrogenated solvents for coal liquefaction
CN109097100B (en) Method for removing solid content of catalytic cracking slurry oil
CN103739175A (en) Method for processing oil sludge
CN106753742B (en) Regeneration method of waste lubricating oil
JP2009227718A (en) Manufacturing method for ashless coal

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C02 Deemed withdrawal of patent application after publication (patent law 2001)
WD01 Invention patent application deemed withdrawn after publication