CN103509573A - Process for preparing high-quality coal-series needle-coke - Google Patents
Process for preparing high-quality coal-series needle-coke Download PDFInfo
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- CN103509573A CN103509573A CN201210209782.0A CN201210209782A CN103509573A CN 103509573 A CN103509573 A CN 103509573A CN 201210209782 A CN201210209782 A CN 201210209782A CN 103509573 A CN103509573 A CN 103509573A
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Abstract
The invention discloses a process for preparing a high-quality coal-series needle-coke. The process comprises the steps: mixing a raw material with a solvent, removing a quinoline insoluble substance by physical separation, after separation, distilling the clarified liquid, and employing a distilled light fraction as the solvent; after carrying out hydrogenation treatment of a distilled heavy fraction, distilling again to obtain a raw material for preparing the needle-coke; and employing a heavy fraction fractionated from oil gas obtained by the secondary distillation as the solvent. While recycling the raw material, the high-quality coal-series needle-coke raw material with the quinoline insoluble substance content of less than 0.1% and lower toluene insoluble-quinoline soluble substance content can be prepared.
Description
Technical field
The invention belongs to coal chemical technology, be specifically related to a kind of technique of preparing high-quality coal-based needle coke raw material.
Background technology
Needle coke is the main raw material of producing ultra-high power graphite electrode and high power graphite electrode, the Graphite Electrodes made from needle coke has that thermal shock resistance is strong, physical strength is high, oxidation susceptibility is good, electrical consumption is low and the advantage such as the current density that allows is large, so the market requirement is huge.The needle coke of producing is at present used the difference of raw material can be divided into petroleum needle coke and the large class of coal-based needle coke two according to it.Wherein, petroleum needle coke be take petroleum residual oil and is made as raw material production, and coal-based needle coke is usingd coal tar or coal-tar pitch etc. and prepared as raw material.Due to the future development of refining of petroleum trend towards catalytic cracking lighting deep processing, cause the raw material of petroleum needle coke to reduce gradually, so from the later stage seventies in last century, coal-based needle coke prepared broad development.
The raw material of coal-based needle coke is comprised of three parts, is respectively toluene solvend (TS), toluene insoluble-quinoline solvend (QS-TI) and quinoline insolubles (QI).Those skilled in the art are when carrying out purifying treatment to needle-shape coke raw material, because QI component is to be unprofitable to needle coke completely produce, so this material will be removed up hill and dale as much as possible; In addition, QS-TI component can have influence on spherular growth, and then has influence on the quality of needle coke, and the content of this component is more, and the quality that obtains needle coke is poorer, therefore in order to obtain high-quality needle coke, also should as far as possible this component be removed.In the method for many purifying treatment, solvent method because simple to operate, expense is cheap and be widely used.Solvent method is that suitable solvent is fully mixed with coal tar or coal-tar pitch raw material, by modes such as centrifugation, filtering separation or gravity settlings, removes solvent insolubles wherein again.
In prior art, Chinese patent CN1940017A has announced a kind of preparation method of needle coke.Its key step comprises catalytic cracking Residual oil (FCC slurry oil), after one or more in coal tar fraction or asphalt stock and light constituent solvent, send into settlement separate tower and carry out standing separation, isolated refined asphaltic bitumen mixing oil enters vacuum flasher again and carries out quick flash distillation from the tower top outflow of settlement separate tower, temperature in vacuum flasher is 250-400 ℃, the light constituent oil of deviating from after flash distillation is back to as circulating solvent that settlement separate tower mixes with raw material or to send into light constituent oil medial launder standby again, remove the exquisite asphalt oil that obtains after light constituent oil from vacuum flasher is discharged, enter tubular reactor carry out heated polymerizable generate in the middle of phase.This process using light constituent oil carries out purifying treatment as solvent to needle-shape coke raw material, and the content of the quinoline insolubles the exquisite asphalt oil of discharging from vacuum flasher is less than 2%.
Above-mentioned technique is by adopting light constituent oil to process needle-shape coke raw material, although removed to a certain extent the quinoline insolubles in refined asphaltic bitumen oil, but because the diameter of quinoline insolubles is less than 0.1um conventionally, be difficult to be removed, therefore the content of its quinoline insolubles only can reach below 2%, and in the time of cannot meeting the high-quality needle coke of preparation, in raw material, quinoline insolubles content should be lower than 0.1% requirement.In addition, light constituent Oil solvent in above-mentioned technique is larger to the solubleness of the toluene insoluble-quinoline solvend component in asphalt oil, in needle-shape coke raw material after above-mentioned art breading, the content of toluene insoluble-quinoline solvend component is also higher, cannot meet equally the requirement of the high-quality needle coke of preparation.
Summary of the invention
In order to solve, in prior art, preparing the process using light constituent oil of needle coke processes needle-shape coke raw material, in the time of cannot meeting the high-quality needle coke of preparation, in raw material, quinoline insolubles content should be lower than 0.1% requirement, and light constituent Oil solvent is larger to the solubleness of the toluene insoluble-quinoline solvend component in asphalt oil, in needle-shape coke raw material after processing, the content of toluene insoluble-quinoline solvend component is also higher, cannot meet equally the problem of the requirement of the high-quality needle coke of preparation, the invention provides a kind of technique that can effectively remove the high-quality coal-based needle coke raw material of preparation of quinoline insolubles and toluene insoluble-quinoline solvend component in needle-shape coke raw material.
The technical scheme of the technique of the high-quality coal-based needle coke raw material of preparation of the present invention is:
A technique of preparing high-quality coal-based needle coke raw material, comprises following steps:
(1) by coal measures raw material and solvent, after stirring, adopt physical sepn to remove desolventizing insolubles and obtain clear liquor, described coal measures raw material is coal tar or coal-tar pitch;
Described solvent at least comprises that one or more in the distillate of 200～350 ℃ that coal tar, coal-tar pitch or Doak Tar Oil obtain process through hydrogenation or coking the coal measures heavy ends of 200 ℃-300 ℃ that the product that obtains obtains through fractionation again;
The mass ratio of described solvent and described coal measures raw material is 0.5-10;
(2) described clear liquor is carried out to hydrotreatment;
(3) product hydrotreatment being obtained distills, and fractionates out > heavy ingredient of 300 ℃ is the raw material of preparing coal-based needle coke.
The mass ratio of described solvent and described coal measures raw material is 2-8.
Described solvent at least comprises the coal measures heavy ends of 200 ℃-300 ℃ that product that a kind of in the distillate of 200～350 ℃ that coal-tar pitch or Doak Tar Oil obtain or two kinds are processed to obtain through hydrogenation or coking obtains through fractionation again.
Described solvent also comprises the petroleum heavy ends of 200 ℃-300 ℃ obtaining through fractionation.
The described coal measures heavy ends comprising in described solvent and the mass ratio of described petroleum heavy ends are 5:95-99:1.
The described coal measures heavy ends comprising in described solvent and the mass ratio of described petroleum heavy ends are 10:90-75:25.In step (3), the product that hydrotreatment is obtained distills, and the heavy ends between the 200-300 fractionating out ℃ is as the solvent in step (1).
Described solvent also comprises coal measures light ends.
Before hydrotreatment, described clear liquor is distilled described clear liquor is carried out, the fractionate out≤cut of 200 ℃ is as the coal measures light ends in described solvent, to residue > cut of 200 ℃ carries out hydrotreatment.
The mass ratio of described coal measures heavy ends and described coal measures light ends is 5:95-75:25.
The mass ratio of described coal measures heavy ends and described coal measures light ends is 20:80-60:40.
The temperature of described hydrotreatment is 330 ℃-390 ℃, and pressure is less than or equal to 19Mpa.
The temperature condition of described hydrotreatment is 350 ℃-380 ℃, and pressure is 8-15Mpa.
Described physical sepn is centrifugation.
The relative centrifugal force of described centrifugation is 1200-4000G.
The relative centrifugal force of described centrifugation is 2000-3500G.
The technique of the high-quality coal-based needle coke raw material of preparation of the present invention, step (1) is mixed coal tar or coal-tar pitch with the coal measures heavy ends going out through hydrotreatment aftercut, reason is that described coal measures heavy ends is lower to the solubleness of above-mentioned coal measures raw material, use the above-mentioned coal measures heavy ends going out through hydrotreatment aftercut as solvent, after described solvent is mixed with coal tar or coal-tar pitch, in raw material, to preparing the toluene solvend that needle coke is useful, can be formed clear liquor by described dissolution with solvents, quinoline insolubles and a large amount of QS-TI form insolubles precipitation, wherein undissolved QS-TI can be coated on quinoline insolubles particulate around, because the described solvent in the present invention is lower to the solubleness of raw material, therefore undissolved QS-TI precipitation capacity is larger, and then make described quinoline insolubles coating thickness around larger, in the process of physical sepn, be more easily removed.Therefore, technique of the present invention in quinoline insolubles content, has also effectively been removed the QS-TI in raw material in effectively reducing raw material.
The mass ratio that described solvent and described coal tar or described coal-tar pitch are set in step of the present invention (1) is 0.5-10, reason is the too little dissolving that can limit toluene solvend of this mass ratio, thereby the output that reduces needle coke, can cause the waste of solvent too greatly.The present invention is 0.5-10 by limiting the mass ratio of described solvent and described coal measures raw material, has effectively avoided above-mentioned two situations.The mass ratio of the also further preferred described solvent of the present invention and described coal measures raw material is 2-8, is because both can further fully dissolve toluene solvend in this proportional range, does not waste again solvent.
Step in the present invention (2) is carried out hydrotreatment to described clear liquor; The present invention is by carrying out hydrotreatment to described clear liquor, object is in order to remove the sulphur in needle-shape coke raw material, and in the process of hydrotreatment, the sulphur in raw material can change corresponding hydrogen sulfide into and remove, thereby greatly reduce the content of sulphur, effectively prevented the swelling of needle coke product.In order to improve hydrogenation efficiency, the temperature that the present invention also limits described hydrotreatment is 330 ℃-390 ℃, and pressure is less than 19Mpa, and the temperature condition of further preferred described hydrotreatment is 350 ℃-380 ℃, pressure 8-15Mpa.
The product that step of the present invention (3) obtains hydrotreatment distills, to what fractionate out > heavy ingredient of 300 ℃ carries out coking, obtains needle coke product.
The advantage of the technique of the high-quality coal-based needle coke raw material of preparation of the present invention is:
(1) technique of the high-quality coal-based needle coke raw material of preparation of the present invention, it is centrifugation that described physical sepn is set, and further preferred described relative centrifugal force is 2000-3500G.Reason is, the method for described centrifugation is than other physical separation method, and such as filtration method, settling process etc., has higher separation efficiency, by described centrifugal method, can effectively remove the quinoline insolubles in described coal measures raw material.
(2) technique of the high-quality coal-based needle coke raw material of preparation of the present invention, described solvent is also set and comprises coal measures light ends, be because can further reduce quinoline insolubles and the solubleness of QS-TI in solvent adding of coal measures light ends, thereby improve the quality of needle-shape coke raw material.Simultaneously, the mass ratio that the present invention also limits described coal measures heavy ends and described coal measures light ends is 5:95-75:25, select this proportional range to be because light ends too much can make quinoline insolubles and the QS-TI solubleness in solvent extremely low and make TS quantitative change few, thereby cause needle coke output few; And light ends is crossed the effect that does not have at least further reduction quinoline insolubles and the solubleness of QS-TI in solvent, can not improve the quality of needle-shape coke raw material.The present invention also mass ratio of preferred described coal measures heavy ends and described coal measures light ends is 20:75-60:35.
(3) technique of the high-quality coal-based needle coke raw material of preparation of the present invention, described clear liquor is being carried out before hydrotreatment, first described clear liquor is distilled under 200 ℃ of conditions, the coal measures light ends fractionating out is as the solvent in step (1), thereby realized the recycle of light ends, because the coal measures heavy ends in solvent described in the present invention is for to distill the hydrogenation products in step (3), cut between fractionate out 200 ℃-300 ℃, therefore solvent of the present invention can obtain by the circulation in technique, reduced the cost of technique.
In addition, the present invention is arranged on described clear liquor is carried out, before hydrotreatment, described clear liquor being distilled, and the fractionate out≤cut of 200 ℃ is as the coal measures light ends in solvent, only to remaining > cut of 200 ℃ carries out hydrotreatment, also played the effect that improves hydrogenation efficiency.
Accompanying drawing explanation
In order to make content of the present invention more be convenient to understand, below in conjunction with the drawings and specific embodiments, technical solutions according to the invention are further elaborated.
To be coal measures heavy ends of take technique internal reflux of the present invention and coal measures light ends prepare the process flow sheet of high-quality coal-based needle coke raw material as solvent to Fig. 1.
Embodiment
Embodiment 1
The technique of the high-quality coal-based needle coke raw material of the preparation described in the present embodiment, comprises following steps:
(1) preparation of solvent: coal tar is pumped into the first hydrogenator, set temperature is 300 ℃, pressure is 20Mpa, add SAS-10 type dearsenification desulfurization catalyst, described coal tar is carried out to hydrotreatment, the product that hydrotreatment is obtained is sent into the first distillation tower and is distilled, and the heavy ends of 200 ℃-300 ℃ that fractionation is obtained is as solvent;
(2) by coal tar and solvent, after stirring, adopt the settlement separate desolventizing insolubles that removes to obtain clear liquor, in the present embodiment, the settlement separate time is 24 hours, the mass ratio of described solvent and described coal tar is 0.5;
(3) described clear liquor is pumped into the second hydrogenator, set temperature is 330 ℃, and pressure is 19Mpa, adds SAS-10 type dearsenification desulfurization catalyst, and described clear liquor is carried out to hydrotreatment;
(4) product hydrotreatment being obtained is sent into second column and is distilled, and fractionates out > heavy ingredient of 300 ℃ is the raw material of preparing coal-based needle coke.
Embodiment 2
The technique of the high-quality coal-based needle coke raw material of the preparation described in the present embodiment, comprises following steps:
(1) preparation of solvent: coal-tar pitch is pumped into the first hydrogenator, set temperature is 300 ℃, pressure is 20Mpa, add FHRS-2 type hydrogenation to mend Si catalyst, described coal-tar pitch is carried out to hydrotreatment, the product that hydrotreatment is obtained is sent into the first distillation tower and is distilled, and the heavy ends of 200 ℃-300 ℃ that fractionation is obtained is as solvent;
(2) by coal-tar pitch and solvent, after stirring, adopt the settlement separate desolventizing insolubles that removes to obtain clear liquor, in the present embodiment, the settlement separate time is 24 hours, the mass ratio of described solvent and described coal-tar pitch is 10;
(3) described clear liquor is pumped into the second hydrogenator, set temperature is 330 ℃, and pressure is 19Mpa, adds FHRS-2 type hydrogenation to mend Si catalyst, and described clear liquor is carried out to hydrotreatment;
(4) product hydrotreatment being obtained is sent into second column and is distilled, and fractionates out > heavy ingredient of 300 ℃ is the raw material of preparing coal-based needle coke.
Embodiment 3
The technique of the high-quality coal-based needle coke raw material of the preparation described in the present embodiment, comprises following steps:
(1) preparation of solvent: the distillate of 200～350 ℃ that Doak Tar Oil is obtained pumps into the first hydrogenator, set temperature is 300 ℃, pressure is 20Mpa, add FV-20 type Hydrobon catalyst, the distillate of 200～350 ℃ that described Doak Tar Oil is obtained carries out hydrotreatment, the product that hydrotreatment is obtained is sent into the first distillation tower and is distilled, the coal measures heavy ends of 200 ℃-300 ℃ that fractionation is obtained is as solvent, in addition in solvent, also contain the petroleum heavy ends of 200 ℃-300 ℃ that petroleum raw material obtains through fractionation, the mass ratio of described coal measures heavy ends and described petroleum heavy ends is 5:95,
(2) by coal tar and solvent, after stirring, adopt the settlement separate desolventizing insolubles that removes to obtain clear liquor, in the present embodiment, the settlement separate time is 24 hours, the mass ratio of described solvent and described coal tar is 10;
(3) described clear liquor is pumped into the second hydrogenator, set temperature is 330 ℃, and pressure is 19Mpa, adds FV-20 type Hydrobon catalyst, and described clear liquor is carried out to hydrotreatment;
(4) product hydrotreatment being obtained is sent into second column and is distilled, and fractionates out > heavy ingredient of 300 ℃ is the raw material of preparing coal-based needle coke.
Embodiment 4
The technique of the high-quality coal-based needle coke raw material of the preparation described in the present embodiment, comprises following steps:
(1) preparation of solvent: coal-tar pitch is pumped into the first hydrogenator, set temperature is 300 ℃, pressure is 20Mpa, add FH-40A type Hydrobon catalyst, described coal-tar pitch is carried out to hydrotreatment, the product that hydrotreatment is obtained is sent into the first distillation tower and is distilled, the coal measures heavy ends of 200 ℃-300 ℃ that fractionation is obtained is as solvent, in addition in solvent, also contain the petroleum heavy ends of 200 ℃-300 ℃ that petroleum raw material obtains through fractionation, the mass ratio of described coal measures heavy ends and described petroleum heavy ends is 99:1;
(2) by coal-tar pitch and solvent, after stirring, adopt the settlement separate desolventizing insolubles that removes to obtain clear liquor, in the present embodiment, the settlement separate time is 24 hours, the mass ratio of described solvent and described coal-tar pitch is 10;
(3) described clear liquor is pumped into the second hydrogenator, set temperature is 330 ℃, and pressure is 19Mpa, adds FH-40A type Hydrobon catalyst, and described clear liquor is carried out to hydrotreatment;
(4) product hydrotreatment being obtained is sent into second column and is distilled, and fractionates out > heavy ingredient of 300 ℃ is the raw material of preparing coal-based needle coke.
Embodiment 5
The technique of the high-quality coal-based needle coke raw material of the preparation described in the present embodiment, comprises following steps:
(1) preparation of solvent: coal-tar pitch is pumped into the first hydrogenator, set temperature is 300 ℃, pressure is 20Mpa, add SAS-10 type dearsenification desulfurization catalyst, described coal-tar pitch is carried out to hydrotreatment, the product that hydrotreatment is obtained is sent into the first distillation tower and is distilled, the coal measures heavy ends of 200 ℃-300 ℃ that fractionation is obtained is as solvent, in addition in solvent, also contain the petroleum heavy ends of 200 ℃-300 ℃ that petroleum raw material obtains through fractionation, the mass ratio of described coal measures heavy ends and described petroleum heavy ends is 10:90;
(2) by coal-tar pitch and solvent, after stirring, adopt the settlement separate desolventizing insolubles that removes to obtain clear liquor, in the present embodiment, the settlement separate time is 24 hours, the mass ratio of described solvent and described coal-tar pitch is 10;
(3) described clear liquor is pumped into the second hydrogenator, set temperature is 330 ℃, and pressure is 19Mpa, adds SAS-10 type dearsenification desulfurization catalyst, and described clear liquor is carried out to hydrotreatment;
(4) product hydrotreatment being obtained is sent into second column and is distilled, and fractionates out > heavy ingredient of 300 ℃ is the raw material of preparing coal-based needle coke.
Embodiment 6
The technique of the high-quality coal-based needle coke raw material of the preparation described in the present embodiment, comprises following steps:
(1) preparation of solvent: coal-tar pitch is pumped into the first hydrogenator, set temperature is 300 ℃, pressure is 20Mpa, add FHRS-2 type hydrogenation to mend Si catalyst, described coal-tar pitch is carried out to hydrotreatment, the product that hydrotreatment is obtained is sent into the first distillation tower and is distilled, the coal measures heavy ends of 200 ℃-300 ℃ that fractionation is obtained is as solvent, in addition in solvent, also contain the petroleum heavy ends of 200 ℃-300 ℃ that petroleum raw material obtains through fractionation, the mass ratio of described coal measures heavy ends and described petroleum heavy ends is 75:25;
(2) by coal-tar pitch and solvent, after stirring, adopt the settlement separate desolventizing insolubles that removes to obtain clear liquor, in the present embodiment, the settlement separate time is 24 hours, the mass ratio of described solvent and described coal-tar pitch is 0.5;
(3) described clear liquor is distilled, fractionate out≤coal measures the light ends of 200 ℃ refluxes as the solvent in step (2), by remaining > cut of 200 ℃ pumps into the second hydrogenator, set temperature is 330 ℃, pressure is 19Mpa, add FHRS-2 type hydrogenation to mend Si catalyst, described clear liquor is carried out to hydrotreatment;
(4) product hydrotreatment being obtained is sent into second column and is distilled, and fractionates out coal measures heavy ends between 200 ℃-300 ℃ and refluxes as the solvent in step (2), fractionates out > heavy ingredient of 300 ℃ is the raw material of preparing coal-based needle coke,
The mass ratio of the heavy ends of coal measures described in solvent and described coal measures light ends is 5:95.
Embodiment 7
The technique of the high-quality coal-based needle coke raw material of the preparation described in the present embodiment, comprises following steps:
(1) preparation of solvent: coal-tar pitch is pumped into the first hydrogenator, set temperature is 300 ℃, pressure is 20Mpa, add FV-20 type Hydrobon catalyst, described coal-tar pitch is carried out to hydrotreatment, the product that hydrotreatment is obtained is sent into the first distillation tower and is distilled, the coal measures heavy ends of 200 ℃-300 ℃ that fractionation is obtained is as solvent, in addition in solvent, also contain the petroleum heavy ends of 200 ℃-300 ℃ that petroleum raw material obtains through fractionation, the mass ratio of described coal measures heavy ends and described petroleum heavy ends is 55:45;
(2) by coal-tar pitch and solvent, after stirring, adopt the settlement separate desolventizing insolubles that removes to obtain clear liquor, in the present embodiment, the settlement separate time is 24 hours, the mass ratio of described solvent and described coal-tar pitch is 0.5;
(3) described clear liquor is distilled, fractionate out≤coal measures the light ends of 200 ℃ refluxes as the solvent in step (2), by remaining > cut of 200 ℃ pumps into the second hydrogenator, set temperature is 330 ℃, pressure is 19Mpa, add FV-20 type Hydrobon catalyst, described clear liquor is carried out to hydrotreatment;
(4) product hydrotreatment being obtained is sent into second column and is distilled, and fractionates out coal measures heavy ends between 200 ℃-300 ℃ and refluxes as the solvent in step (2), fractionates out > heavy ingredient of 300 ℃ is the raw material of preparing coal-based needle coke,
The mass ratio of the heavy ends of coal measures described in solvent and described coal measures light ends is 75:25.
Embodiment 8
The technique of the high-quality coal-based needle coke raw material of the preparation described in the present embodiment, comprises following steps:
(1) preparation of solvent: coal-tar pitch is pumped into the first hydrogenator, set temperature is 300 ℃, pressure is 20Mpa, add FH-40A type Hydrobon catalyst, described coal-tar pitch is carried out to hydrotreatment, the product that hydrotreatment is obtained is sent into the first distillation tower and is distilled, and the heavy ends of 200 ℃-300 ℃ that fractionation is obtained is as solvent;
(2) by coal-tar pitch and solvent, after stirring, adopt the settlement separate desolventizing insolubles that removes to obtain clear liquor, in the present embodiment, the settlement separate time is 24 hours, the mass ratio of described solvent and described coal-tar pitch is 0.5;
(3) described clear liquor is distilled, fractionate out≤coal measures the light ends of 200 ℃ refluxes as the solvent in step (2), by remaining > cut of 200 ℃ pumps into the second hydrogenator, set temperature is 330 ℃, pressure is 19Mpa, add FH-40A type Hydrobon catalyst, described clear liquor is carried out to hydrotreatment;
(4) product hydrotreatment being obtained is sent into second column and is distilled, and fractionates out coal measures heavy ends between 200 ℃-300 ℃ and refluxes as the solvent in step (2), fractionates out > heavy ingredient of 300 ℃ is the raw material of preparing coal-based needle coke,
The mass ratio of the heavy ends of coal measures described in solvent and described coal measures light ends is 20:80.
Embodiment 9
The technique of the high-quality coal-based needle coke raw material of the preparation described in the present embodiment, comprises following steps:
(1) preparation of solvent: coal-tar pitch is pumped into the first hydrogenator, set temperature is 300 ℃, pressure is 20Mpa, add SAS-10 type dearsenification desulfurization catalyst, described coal-tar pitch is carried out to hydrotreatment, the product that hydrotreatment is obtained is sent into the first distillation tower and is distilled, and the heavy ends of 200 ℃-300 ℃ that fractionation is obtained is as solvent;
(2) by coal-tar pitch and solvent, after stirring, adopt the settlement separate desolventizing insolubles that removes to obtain clear liquor, in the present embodiment, the settlement separate time is 24 hours, the mass ratio of described solvent and described coal-tar pitch is 0.5;
(3) described clear liquor is distilled, fractionate out≤coal measures the light ends of 200 ℃ refluxes as the solvent in step (2), by remaining > cut of 200 ℃ pumps into the second hydrogenator, set temperature is 330 ℃, pressure is 19Mpa, add SAS-10 type dearsenification desulfurization catalyst, described clear liquor is carried out to hydrotreatment;
(4) product hydrotreatment being obtained is sent into second column and is distilled, and fractionates out coal measures heavy ends between 200 ℃-300 ℃ and refluxes as the solvent in step (2), fractionates out > heavy ingredient of 300 ℃ is the raw material of preparing coal-based needle coke,
The mass ratio of the heavy ends of coal measures described in solvent and described coal measures light ends is 40:60.
Embodiment 10
The technique of the high-quality coal-based needle coke raw material of the preparation described in the present embodiment, comprises following steps:
(1) preparation of solvent: coal-tar pitch is pumped into the first hydrogenator, set temperature is 300 ℃, pressure is 20Mpa, add FHRS-2 type hydrogenation to mend Si catalyst, described coal-tar pitch is carried out to hydrotreatment, the product that hydrotreatment is obtained is sent into the first distillation tower and is distilled, and the heavy ends of 200 ℃-300 ℃ that fractionation is obtained is as solvent;
(2) by coal-tar pitch and solvent, after stirring, adopt the settlement separate desolventizing insolubles that removes to obtain clear liquor, in the present embodiment, the settlement separate time is 24 hours, the mass ratio of described solvent and described coal-tar pitch is 0.5;
(3) described clear liquor is distilled, fractionate out≤coal measures the light ends of 200 ℃ refluxes as the solvent in step (2), by remaining > cut of 200 ℃ pumps into the second hydrogenator, set temperature is 390 ℃, pressure is 19Mpa, add FHRS-2 type hydrogenation to mend Si catalyst, described clear liquor is carried out to hydrotreatment;
(4) product hydrotreatment being obtained is sent into second column and is distilled, and fractionates out coal measures heavy ends between 200 ℃-300 ℃ and refluxes as the solvent in step (2), fractionates out > heavy ingredient of 300 ℃ is the raw material of preparing coal-based needle coke,
The mass ratio of the heavy ends of coal measures described in solvent and described coal measures light ends is 60:40.
Embodiment 11
The technique of the high-quality coal-based needle coke raw material of the preparation described in the present embodiment, comprises following steps:
(1) preparation of solvent: coal-tar pitch is pumped into the first hydrogenator, set temperature is 300 ℃, pressure is 20Mpa, add FV-20 type Hydrobon catalyst, described coal-tar pitch is carried out to hydrotreatment, the product that hydrotreatment is obtained is sent into the first distillation tower and is distilled, and the heavy ends of 200 ℃-300 ℃ that fractionation is obtained is as solvent;
(2) by coal-tar pitch and solvent, after stirring, adopt the settlement separate desolventizing insolubles that removes to obtain clear liquor, in the present embodiment, the settlement separate time is 24 hours, the mass ratio of described solvent and described coal-tar pitch is 0.5;
(3) described clear liquor is distilled, fractionate out≤coal measures the light ends of 200 ℃ refluxes as the solvent in step (2), by remaining > cut of 200 ℃ pumps into the second hydrogenator, set temperature is 350 ℃, pressure is 8Mpa, add FV-20 type Hydrobon catalyst, described clear liquor is carried out to hydrotreatment;
(4) product hydrotreatment being obtained is sent into second column and is distilled, and fractionates out coal measures heavy ends between 200 ℃-300 ℃ and refluxes as the solvent in step (2), fractionates out > heavy ingredient of 300 ℃ is the raw material of preparing coal-based needle coke,
The mass ratio of the heavy ends of coal measures described in solvent and described coal measures light ends is 60:40.
Embodiment 12
The technique of the high-quality coal-based needle coke raw material of the preparation described in the present embodiment, comprises following steps:
(1) preparation of solvent: coal-tar pitch is pumped into the first hydrogenator, set temperature is 300 ℃, pressure is 20Mpa, add FH-40A type Hydrobon catalyst, described coal-tar pitch is carried out to hydrotreatment, the product that hydrotreatment is obtained is sent into the first distillation tower and is distilled, and the heavy ends of 200 ℃-300 ℃ that fractionation is obtained is as solvent;
(2) by coal-tar pitch and solvent, after stirring, adopt the settlement separate desolventizing insolubles that removes to obtain clear liquor, in the present embodiment, the settlement separate time is 24 hours, the mass ratio of described solvent and described coal-tar pitch is 0.5;
(3) described clear liquor is distilled, fractionate out≤coal measures the light ends of 200 ℃ refluxes as the solvent in step (2), by remaining > cut of 200 ℃ pumps into the second hydrogenator, set temperature is 380 ℃, pressure is 15Mpa, add FH-40A type Hydrobon catalyst, described clear liquor is carried out to hydrotreatment;
(4) product hydrotreatment being obtained is sent into second column and is distilled, and fractionates out coal measures heavy ends between 200 ℃-300 ℃ and refluxes as the solvent in step (2), fractionates out > heavy ingredient of 300 ℃ is the raw material of preparing coal-based needle coke,
The mass ratio of the heavy ends of coal measures described in solvent and described coal measures light ends is 60:40.
Embodiment 13
The technique of the high-quality coal-based needle coke raw material of the preparation described in the present embodiment, comprises following steps:
(1) preparation of solvent: the distillate of 200～350 ℃ that Doak Tar Oil is obtained pumps into the first hydrogenator, set temperature is 300 ℃, pressure is 20Mpa, add SAS-10 type dearsenification desulfurization catalyst, the distillate of 200～350 ℃ that described Doak Tar Oil is obtained carries out hydrotreatment, the product that hydrotreatment is obtained is sent into the first distillation tower and is distilled, and the heavy ends of 200 ℃-300 ℃ that fractionation is obtained is as solvent;
(2) by coal tar and solvent, after stirring, adopt the settlement separate desolventizing insolubles that removes to obtain clear liquor, in the present embodiment, the settlement separate time is 24 hours, the mass ratio of described solvent and described coal tar is 2;
(3) described clear liquor is distilled, fractionate out≤coal measures the light ends of 200 ℃ refluxes as the solvent in step (2), by remaining > cut of 200 ℃ pumps into the second hydrogenator, set temperature is 380 ℃, pressure is 15Mpa, add SAS-10 type dearsenification desulfurization catalyst, described clear liquor is carried out to hydrotreatment;
(4) product hydrotreatment being obtained is sent into second column and is distilled, and fractionates out coal measures heavy ends between 200 ℃-300 ℃ and refluxes as the solvent in step (2), fractionates out > heavy ingredient of 300 ℃ is the raw material of preparing coal-based needle coke,
The mass ratio of the heavy ends of coal measures described in solvent and described coal measures light ends is 60:40.
Embodiment 14
The technique of the high-quality coal-based needle coke raw material of the preparation described in the present embodiment, comprises following steps:
(1) preparation of solvent: the distillate of 200～350 ℃ that Doak Tar Oil is obtained pumps into the first hydrogenator, set temperature is 300 ℃, pressure is 20Mpa, add FHRS-2 type hydrogenation to mend Si catalyst, the distillate of 200～350 ℃ that described Doak Tar Oil is obtained carries out hydrotreatment, the product that hydrotreatment is obtained is sent into the first distillation tower and is distilled, and the heavy ends of 200 ℃-300 ℃ that fractionation is obtained is as solvent;
(2) by coal tar and solvent, after stirring, adopt the settlement separate desolventizing insolubles that removes to obtain clear liquor, in the present embodiment, the settlement separate time is 24 hours, the mass ratio of described solvent and described coal tar is 5;
(3) described clear liquor is distilled, fractionate out≤coal measures the light ends of 200 ℃ refluxes as the solvent in step (2), by remaining > cut of 200 ℃ pumps into fixed bed hydrogenation reactor, set temperature is 380 ℃, pressure is 15Mpa, add FHRS-2 type hydrogenation to mend Si catalyst, described clear liquor is carried out to hydrotreatment;
(4) product hydrotreatment being obtained is sent into second column and is distilled, and fractionates out coal measures heavy ends between 200 ℃-300 ℃ and refluxes as the solvent in step (2), fractionates out > heavy ingredient of 300 ℃ is the raw material of preparing coal-based needle coke,
The mass ratio of the heavy ends of coal measures described in solvent and described coal measures light ends is 60:40.
Embodiment 15
The technique of the high-quality coal-based needle coke raw material of the preparation described in the present embodiment, comprises following steps:
(1) preparation of solvent: the distillate of 200～350 ℃ that Doak Tar Oil is obtained pumps into the first hydrogenator, set temperature is 300 ℃, pressure is 20Mpa, add FV-20 type Hydrobon catalyst, the distillate of 200～350 ℃ that described Doak Tar Oil is obtained carries out hydrotreatment, the product that hydrotreatment is obtained is sent into the first distillation tower and is distilled, and the heavy ends of 200 ℃-300 ℃ that fractionation is obtained is as solvent;
(2) by coal tar and solvent, after stirring, adopt the settlement separate desolventizing insolubles that removes to obtain clear liquor, in the present embodiment, the settlement separate time is 24 hours, the mass ratio of described solvent and described coal tar is 8;
(3) described clear liquor is distilled, fractionate out≤coal measures the light ends of 200 ℃ refluxes as the solvent in step (2), by remaining > cut of 200 ℃ pumps into the second hydrogenator, set temperature is 380 ℃, pressure is 15Mpa, add FV-20 type Hydrobon catalyst, described clear liquor is carried out to hydrotreatment;
(4) product hydrotreatment being obtained is sent into second column and is distilled, and fractionates out coal measures heavy ends between 200 ℃-300 ℃ and refluxes as the solvent in step (2), fractionates out > heavy ingredient of 300 ℃ is the raw material of preparing coal-based needle coke,
Described coal measures heavy ends in solvent and the mass ratio of described coal measures light ends are 60:40.
Embodiment 16
The technique of the high-quality coal-based needle coke raw material of the preparation described in the present embodiment, comprises following steps:
(1) preparation of solvent: the distillate of 200～350 ℃ that Doak Tar Oil is obtained pumps into the first hydrogenator, set temperature is 300 ℃, pressure is 20Mpa, add FH-40A type Hydrobon catalyst, the distillate of 200～350 ℃ that described Doak Tar Oil is obtained carries out hydrotreatment, the product that hydrotreatment is obtained is sent into the first distillation tower and is distilled, and the heavy ends of 200 ℃-300 ℃ that fractionation is obtained is as solvent;
(2) by coal tar and solvent, after stirring, adopt centrifugation to remove desolventizing insolubles and obtain clear liquor, the centrifugal force of centrifugation is 2900G, the mass ratio of described solvent and described coal tar is 8;
(3) described clear liquor is distilled, fractionate out≤coal measures the light ends of 200 ℃ refluxes as the solvent in step (2), by remaining > cut of 200 ℃ pumps into the second hydrogenator, set temperature is 380 ℃, pressure is 15Mpa, add FH-40A type Hydrobon catalyst, described clear liquor is carried out to hydrotreatment;
(4) product hydrotreatment being obtained is sent into second column and is distilled, and fractionates out coal measures heavy ends between 200 ℃-300 ℃ and refluxes as the solvent in step (2), fractionates out > heavy ingredient of 300 ℃ is the raw material of preparing coal-based needle coke,
Described coal measures heavy ends in solvent and the mass ratio of described coal measures light ends are 60:40.
Embodiment 17
The technique of the high-quality coal-based needle coke raw material of the preparation described in the present embodiment, comprises following steps:
(1) preparation of solvent: the distillate of 200～350 ℃ that Doak Tar Oil is obtained pumps into the first hydrogenator, set temperature is 300 ℃, pressure is 20Mpa, add SAS-10 type dearsenification desulfurization catalyst, the distillate of 200～350 ℃ that described Doak Tar Oil is obtained carries out hydrotreatment, the product that hydrotreatment is obtained is sent into the first distillation tower and is distilled, and the heavy ends of 200 ℃-300 ℃ that fractionation is obtained is as solvent
(2) by coal tar and solvent, after stirring, adopt centrifugation to remove desolventizing insolubles and obtain clear liquor, the centrifugal force of centrifugation is 3100G, the mass ratio of described solvent and described coal tar is 8;
(3) described clear liquor is distilled, fractionate out≤coal measures the light ends of 200 ℃ refluxes as the solvent in step (2), by remaining > cut of 200 ℃ pumps into the second hydrogenator, set temperature is 380 ℃, pressure is 15Mpa, add SAS-10 type dearsenification desulfurization catalyst, described clear liquor is carried out to hydrotreatment;
(4) product hydrotreatment being obtained is sent into second column and is distilled, and fractionates out coal measures heavy ends between 200 ℃-300 ℃ and refluxes as the solvent in step (2), fractionates out > heavy ingredient of 300 ℃ is the raw material of preparing coal-based needle coke,
Described coal measures heavy ends in solvent and the mass ratio of described coal measures light ends are 60:40.
In the middle of embodiment 6-embodiment 17, as preferred embodiment, in order to reduce process costs, in subsequent technique circulation after the first round, coal-based needle coke raw material finished, can utilize the coal measures heavy ends of backflow and the coal measures light ends of backflow to replace the solvent of preparing in the step (1) of above-described embodiment completely, as shown in Figure 1.
In the above-described embodiments, the air speed of described fixed bed hydrogenation reactor is set to 0.5h-1, and the service temperature of described distillation tower is greater than 200 ℃.Described the first hydrogenator and the second hydrogenator are fixed bed hydrogenation reactor.
Experimental example
In order to confirm technique effect of the present invention, the present invention is provided with experimental example, QI in raw material before and after above-described embodiment step (1) is processed and the quality percentage composition of QS-TI component are measured, wherein the specimen in embodiment 6-17 is the coal measures heavy ends of backflow and the raw material after the solvent in the complete step of replacing of coal measures light ends (1), and result is as follows:
Comparative example
In order further to confirm technique effect of the present invention, the present invention is also provided with comparative example, and this comparative example adopts the coal tar raw material described in embodiment 1, adopts the preparation technology of the needle coke of Chinese patent CN1940017A announcement:
(1) by described coal tar and solvent, after stirring, adopt settlement separate method to remove desolventizing insolubles and obtain clear liquor, the mass ratio of described solvent and described coal tar is 0.5; Described solvent is the light ends that comes from vacuum flasher;
(2) described clear liquor is sent into vacuum flasher, under 300 ℃ of conditions, distill, after the coal measures light ends distilling out refluxes, be used as the solvent in step (1).
QI in the clear liquor obtaining in described step (1) and QS-TI component are measured, its content is respectively 1.5% and 5.9%, than the clear liquor in embodiment 1, in comparative example, QI and QS-TI component concentration have exceeded respectively 1.42% and 3.4%, therefore, technique in the present invention, than comparative example, can prepare QI and the lower needle-shape coke raw material of QS-TI component concentration.
Obviously, above-described embodiment is only for example is clearly described, and the not restriction to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without also giving all embodiments.And the apparent variation of being extended out thus or change are still among the protection domain in the invention.
Claims (16)
1. a technique of preparing high-quality coal-based needle coke raw material, is characterized in that, comprises following steps:
(1) by coal measures raw material and solvent, after stirring, adopt physical sepn to remove desolventizing insolubles and obtain clear liquor, described coal measures raw material is coal tar or coal-tar pitch;
Described solvent at least comprises that one or more in the distillate of 200～350 ℃ that coal tar, coal-tar pitch or Doak Tar Oil obtain process through hydrogenation or coking the coal measures heavy ends of 200 ℃-300 ℃ that the product that obtains obtains through fractionation again;
The mass ratio of described solvent and described coal measures raw material is 0.5-10;
(2) described clear liquor is carried out to hydrotreatment;
(3) product hydrotreatment being obtained distills, and fractionates out > heavy ingredient of 300 ℃ is the raw material of preparing coal-based needle coke.
2. the technique of the high-quality coal-based needle coke raw material of preparation according to claim 1, is characterized in that, the mass ratio of described solvent and described coal measures raw material is 2-8.
3. the technique of utilizing solvent method to prepare high-quality coal-based needle coke according to claim 1 and 2, it is characterized in that, described solvent at least comprises the coal measures heavy ends of 200 ℃-300 ℃ that product that a kind of in the distillate of 200～350 ℃ that coal-tar pitch or Doak Tar Oil obtain or two kinds are processed to obtain through hydrogenation or coking obtains through fractionation again.
4. the technique of the high-quality coal-based needle coke raw material of preparation according to claim 3, is characterized in that, described solvent also comprises the petroleum heavy ends of 200 ℃-300 ℃ obtaining through fractionation.
5. the technique of the high-quality coal-based needle coke raw material of preparation according to claim 4, is characterized in that, the described coal measures heavy ends comprising in described solvent and the mass ratio of described petroleum heavy ends are 5:95-99:1.
6. according to the technique of the arbitrary described high-quality coal-based needle coke of preparation of claim 1-5, it is characterized in that, the described coal measures heavy ends comprising in described solvent and the mass ratio of described petroleum heavy ends are 10:90-75:25.
7. according to the technique of the arbitrary described high-quality coal-based needle coke of preparation of claim 1-6, it is characterized in that, in step (3), the product that hydrotreatment is obtained distills, and the heavy ends between the 200-300 fractionating out ℃ is as the solvent in step (1).
8. according to the technique of the arbitrary described high-quality coal-based needle coke of preparation of claim 1-7, it is characterized in that, described solvent also comprises coal measures light ends.
9. the technique of the high-quality coal-based needle coke of preparation according to claim 8, it is characterized in that, described clear liquor is being carried out before hydrotreatment, described clear liquor is distilled, fractionate out≤the cut of 200 ℃ is as the coal measures light ends in described solvent, to residue > cut of 200 ℃ carries out hydrotreatment.
10. the technique of the high-quality coal-based needle coke of preparation according to claim 9, is characterized in that, the mass ratio of described coal measures heavy ends and described coal measures light ends is 5:95-75:25.
The technique of the high-quality coal-based needle coke of 11. preparation according to claim 10, is characterized in that, the mass ratio of described coal measures heavy ends and described coal measures light ends is 20:80-60:40.
12. according to the technique of the arbitrary described high-quality coal-based needle coke of preparation of claim 1-11, it is characterized in that, the temperature of described hydrotreatment is 330 ℃-390 ℃, and pressure is less than or equal to 19Mpa.
The technique of the high-quality coal-based needle coke of 13. preparation according to claim 12, is characterized in that, the temperature of described hydrotreatment is 350 ℃-380 ℃, and pressure is 8-15Mpa.
The technique of the high-quality coal-based needle coke of 14. preparation according to claim 13, is characterized in that, described physical sepn is centrifugation.
The technique of the high-quality coal-based needle coke of 15. preparation according to claim 14, is characterized in that, the relative centrifugal force of described centrifugation is 1200-4000G.
The technique of the high-quality coal-based needle coke of 16. preparation according to claim 15, is characterized in that, the relative centrifugal force of described centrifugation is 2000-3500G.
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|---|---|---|---|---|
| CN109504416A (en) * | 2018-12-04 | 2019-03-22 | 大同新成新材料股份有限公司 | A kind of production technology of coal-based needle coke |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4482452A (en) * | 1981-05-29 | 1984-11-13 | Kureha Kagaku Kogyo Kabushiki Kaisha | Process for preparing raw material for producing carbon material |
| CN85105609A (en) * | 1984-06-22 | 1987-01-28 | 千代田化工建设株式会社 | The method of hydrogenation of coal tar pitch |
| CN101475820A (en) * | 2009-01-23 | 2009-07-08 | 北京石油化工学院 | Purification method for coal pitch |
| CN101787299A (en) * | 2010-03-01 | 2010-07-28 | 上海尚元化工工程技术有限公司 | Method for extracting, producing and purifying pitch with mixed solvent |
-
2012
- 2012-06-19 CN CN201210209782.0A patent/CN103509573B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4482452A (en) * | 1981-05-29 | 1984-11-13 | Kureha Kagaku Kogyo Kabushiki Kaisha | Process for preparing raw material for producing carbon material |
| CN85105609A (en) * | 1984-06-22 | 1987-01-28 | 千代田化工建设株式会社 | The method of hydrogenation of coal tar pitch |
| CN101475820A (en) * | 2009-01-23 | 2009-07-08 | 北京石油化工学院 | Purification method for coal pitch |
| CN101787299A (en) * | 2010-03-01 | 2010-07-28 | 上海尚元化工工程技术有限公司 | Method for extracting, producing and purifying pitch with mixed solvent |
Non-Patent Citations (2)
| Title |
|---|
| 赵惠菊: "《油品分析技术基础》", 30 September 2010, 中国石化出版社, article "石油的馏分组成", pages: 17-18 * |
| 马宝岐等: "《煤焦油制燃料油品》", 31 January 2011, 化学工业出版社, article "焦油高压加氢", pages: 200-204 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109504416A (en) * | 2018-12-04 | 2019-03-22 | 大同新成新材料股份有限公司 | A kind of production technology of coal-based needle coke |
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