JPH02142889A - Production of coal-derived needle coke - Google Patents
Production of coal-derived needle cokeInfo
- Publication number
- JPH02142889A JPH02142889A JP29742388A JP29742388A JPH02142889A JP H02142889 A JPH02142889 A JP H02142889A JP 29742388 A JP29742388 A JP 29742388A JP 29742388 A JP29742388 A JP 29742388A JP H02142889 A JPH02142889 A JP H02142889A
- Authority
- JP
- Japan
- Prior art keywords
- coke
- coal
- oil
- raw material
- coal tar
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 239000003245 coal Substances 0.000 title abstract description 10
- 239000011331 needle coke Substances 0.000 title abstract description 7
- 239000000571 coke Substances 0.000 claims abstract description 16
- 239000011280 coal tar Substances 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 11
- 229930195733 hydrocarbon Natural products 0.000 claims abstract description 7
- 150000002430 hydrocarbons Chemical class 0.000 claims abstract description 7
- 239000004215 Carbon black (E152) Substances 0.000 claims abstract description 6
- 239000011294 coal tar pitch Substances 0.000 claims abstract description 5
- SMWDFEZZVXVKRB-UHFFFAOYSA-N Quinoline Chemical compound N1=CC=CC2=CC=CC=C21 SMWDFEZZVXVKRB-UHFFFAOYSA-N 0.000 claims description 22
- 239000011311 coal-based needle coke Substances 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 3
- 239000002994 raw material Substances 0.000 abstract description 23
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 3
- 229910002804 graphite Inorganic materials 0.000 abstract description 3
- 239000010439 graphite Substances 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 3
- 230000001007 puffing effect Effects 0.000 abstract 2
- 230000002411 adverse Effects 0.000 abstract 1
- 238000007669 thermal treatment Methods 0.000 abstract 1
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 21
- 239000003921 oil Substances 0.000 description 16
- 238000005087 graphitization Methods 0.000 description 7
- 239000002904 solvent Substances 0.000 description 7
- 238000004939 coking Methods 0.000 description 4
- 238000004821 distillation Methods 0.000 description 4
- 239000011338 soft pitch Substances 0.000 description 4
- 239000003208 petroleum Substances 0.000 description 3
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 2
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 2
- MWPLVEDNUUSJAV-UHFFFAOYSA-N anthracene Chemical compound C1=CC=CC2=CC3=CC=CC=C3C=C21 MWPLVEDNUUSJAV-UHFFFAOYSA-N 0.000 description 2
- 229910021383 artificial graphite Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000003350 kerosene Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000011295 pitch Substances 0.000 description 2
- 150000001338 aliphatic hydrocarbons Chemical class 0.000 description 1
- 150000001491 aromatic compounds Chemical class 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000010000 carbonizing Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010908 decantation Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は石炭系ニードルコークスの製造方法に関するも
のであり、詳しくは黒鉛化時の不可逆膨張スなわち所謂
バッフィングの小さいニードルコークスの製造方法に関
するものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for producing coal-based needle coke, and more specifically, to a method for producing needle coke with small irreversible expansion during graphitization, that is, so-called buffing. It is something.
（従来の技術）
近年、人造黒鉛電極は電極使用条件の苛酷化に伴って高
い機械的強度ならびに耐熱性に秀れていることが要求さ
れる。かかる人造黒鉛電極の製造には熱膨張係数の小さ
いニードルコークスが必要であり、とりわけ熱膨張係数
の低い石炭系ニードルコークスは好まれている。しかし
ながら近時の黒鉛電極製造においては、省エネルギーを
図るために、従来からあるアチソン炉に代って迅速黒鉛
化炉を用いる方法が多くなりつつある。石炭系ニードル
コークスを用いて製造した電極では、迅速黒鉛化炉を用
いて黒鉛化した際にバッフィング現象が現われて亀裂を
生じることがあり、また亀裂発生に至らないまでも、見
掛比重が小さくなって強度の十分な電極が得られないこ
とがある。(Prior Art) In recent years, artificial graphite electrodes are required to have high mechanical strength and excellent heat resistance as the electrode usage conditions have become more severe. The production of such artificial graphite electrodes requires needle coke with a low coefficient of thermal expansion, and coal-based needle coke with a low coefficient of thermal expansion is particularly preferred. However, in recent years, in the production of graphite electrodes, rapid graphitization furnaces are increasingly being used in place of the conventional Acheson furnace in order to save energy. In electrodes manufactured using coal-based needle coke, a buffing phenomenon may occur and cracks may occur when graphitized using a rapid graphitization furnace, and even if cracks do not occur, the apparent specific gravity may be small. Therefore, it may not be possible to obtain an electrode with sufficient strength.
（発明が解決しようとする課題）
前記のように石炭系ニードルコークスの熱膨張係数は著
しるしく低いが、その反面、パンフィングが高いという
難点がある。したがって、それを解決すべき種々の提案
がここ２−３年の間数多く出されている。しかしながら
、そのほとんどが商業的に不利なため工業規板まで到っ
たのは現実にはほとんどないようである。(Problems to be Solved by the Invention) As described above, the coefficient of thermal expansion of coal-based needle coke is extremely low, but on the other hand, it has the disadvantage of high panfing. Therefore, many proposals have been made over the past few years to solve this problem. However, most of them are commercially disadvantageous, so it seems that very few of them have reached the level of industrial standards.
（問題点を解決するための手段）
そこで本発明者らは、上記実情に鑑み、鋭、？検討した
結果、石炭系ニードルコークスの原料油を熱処理するこ
とにより本発明に到達した。(Means for Solving the Problems) Therefore, in view of the above circumstances, the inventors of the present invention have proposed the following: As a result of studies, the present invention was achieved by heat treating raw material oil for coal-based needle coke.
すなわち、一般に石油系原料のように脂肪族系炭化水素
、ナフテン系炭化水素を含むものは熱処理によって芳香
族化し、熱膨張係数を良化するといわれている。しかし
、元来十二分に芳香族性の高い原料であるコールタール
、コールタールピンチは、それが期待できない。That is, it is generally said that those containing aliphatic hydrocarbons and naphthenic hydrocarbons, such as petroleum-based raw materials, are aromatized by heat treatment to improve the coefficient of thermal expansion. However, this cannot be expected from coal tar and coal tar pinch, which are raw materials that are inherently highly aromatic.
そこで、本発明者らは上記のように石油系原料で熱膨張
係数を改善する熱処理という簡単な方法について、石炭
系原料において鋭意検討した結果、理由については明確
でないが、パンフィングを低減できる条件を見い出し本
発明を完成した。Therefore, the present inventors have intensively investigated the simple method of heat treatment for improving the coefficient of thermal expansion of petroleum-based raw materials as described above for coal-based raw materials. They discovered this and completed the present invention.
すなわち、本発明の要旨は、キノリン不溶分を実質的に
含有しないコールタール、コールタールピッチ又はこれ
らをｊＦ体とする炭化水素物質である原料油をニノーク
ストラムに供給してコークス化する方法において、原料
油を熱処理してトルエン不溶分が１０〜２０屯（ｉｊ９
’となるように調製した後、コークストラｌ、に供給す
ることを特徴とする石炭系ニードル、１−クスの製造方
法にある。That is, the gist of the present invention is to provide a method for coking by supplying raw material oil, which is coal tar, coal tar pitch, or a hydrocarbon substance containing these in the jF form, to a Ninok strum, which does not substantially contain quinoline-insoluble matter. The oil is heat-treated to reduce the toluene insoluble content by 10 to 20 tons (ij9
A method for producing a coal-based needle, 1-x, characterized in that the coal-based needle, 1-x, is prepared and then supplied to a coke straw.
以下、本発明の詳細な説明する。The present invention will be explained in detail below.
本発明で使用するコールタールは、石炭を乾留してコー
クスを製造する際に得られる直留のコールタールである
。また、コールタールピッチは、前記コールタールを奈
留する際に塔底から抜き出される軟化点０℃以上、好ま
しくは３０〜１００°Ｃの軟ピツチ又中ピツチと称され
るピンチである。The coal tar used in the present invention is straight-run coal tar obtained when producing coke by carbonizing coal. Coal tar pitch is a pinch called soft pitch or medium pitch with a softening point of 0° C. or higher, preferably 30 to 100° C., which is extracted from the bottom of the tower when the coal tar is reduced.
このコールタールピッチには軟化点調整等のためアント
ラセン油等の油分を添加したものであってもよい。This coal tar pitch may have an oil component such as anthracene oil added thereto to adjust the softening point.
さらにこれらのコールクール又はコールタールピッチに
少量の石油系原料油を添加したものであてもよい。Furthermore, a small amount of petroleum-based raw material oil may be added to these coal cool or coal tar pitches.
これらの石炭系原料油は例えば次のような方法によりキ
ノリン不溶分Ｑｌを除去される。すなわち、これらの原
料を溶剤として例えば沸点又は９５容量％の留出温度が
３５０℃以下であって次式で表わされるＢ、Ｍ、Ｃ，１
，値
Ｂ、Ｍ、Ｃ，１，−４８，６４０／に
４７３、７３−４５６．８
（式中には平均沸点じＫ）、Ｓは６０°Ｆにおける比重
を示す）が５〜７０である炭化水素物質、具体的に好ま
しくは、シクロヘキサン、灯油、灯油十ナフタリン油等
を配合割合が原料：溶剤の重量比としてｉ：ｏ、３〜１
：１になるように加え、混合する。次いで原料と溶剤と
の混合物を静置沈降しデカンテーション法などの簡便な
操作により不溶分を分解除去してキノリン不溶分を実質
的に含まない炭化水素が得られる。ここで清澄液として
得られる縮合芳香族化合物を含む炭化水素物質のキノリ
ン不溶分含有量は通常０．８重量％以下、好ましくは０
．３重量％以下、最適には０．１重量％以下に減少する
。The quinoline insoluble content Ql is removed from these coal-based feedstock oils, for example, by the following method. That is, when these raw materials are used as a solvent, for example, B, M, C,
, the value B, M, C, 1, -48,640/473, 73-456.8 (in the formula, the average boiling point K, S indicates the specific gravity at 60 °F) is 5 to 70 Hydrocarbon substances, specifically preferably cyclohexane, kerosene, kerosene and naphthalene oil, etc. are blended in a ratio of i:o of 3 to 1 as a raw material:solvent weight ratio.
: Add to 1 and mix. Next, the mixture of the raw material and the solvent is allowed to settle and the insoluble matter is decomposed and removed by a simple operation such as a decantation method to obtain a hydrocarbon substantially free of quinoline insoluble matter. The quinoline insoluble content of the hydrocarbon material containing the condensed aromatic compound obtained as a clear liquid is usually 0.8% by weight or less, preferably 0.
．． It is reduced to less than 3% by weight, optimally less than 0.1% by weight.
このキノリン不溶分含有量の１００分率の割合は後記す
る「改質原料油」ずなわら熱処理した原料油重量に対す
る割合である。The 100% ratio of the quinoline insoluble content is the ratio to the weight of the heat-treated raw material oil, which is the "modified raw material oil" described later.
上記の混合、静置沈降、分副の各「程は操作を容易にす
るため好まし７くは、６０〜３ 、”＋ （１℃程度の
温度下で実施され例えばコールタールを原料とする場合
には６０〜９０℃程度、軟コールクールピンチの場合に
ば１５０〜２９０°Ｃ程度が好適である。得られた清澄
液は、次いで、溶剤の沸点或いは９５容足％の留出温度
以下、或いは約３５０℃以下の留出温度で蒸留される。For ease of operation, each of the above-mentioned mixing, settling, and separation processes is preferably carried out at a temperature of about 60 to 3 degrees Celsius (for example, using coal tar as a raw material). In the case of a soft coal cool pinch, the temperature is preferably about 60 to 90°C, and in the case of a soft coal cool pinch, the temperature is preferably about 150 to 290°C. , or distilled at a distillation temperature of about 350°C or less.
留出分は回収され、必要に応し溶剤として再使用される
。例えば、原料としてコールタールを使用する場合には
、溶剤留出（例えば、シクロヘキサンの場合には８１℃
）後、温度を約３００℃に上昇させ、ピンチ化する方が
後のコークス化に有利である。このようにして蒸留後、
留出しない留分は改質原料油として取り出される。The distillate is recovered and reused as a solvent if necessary. For example, when coal tar is used as a raw material, solvent distillation (e.g., 81°C in the case of cyclohexane)
), raising the temperature to about 300°C and pinching is more advantageous for subsequent coking. After distillation in this way,
The fraction that is not distilled is taken out as reformed feedstock oil.
得られる原料油はコークス化装入原料油とじていわゆる
デイレードコーキング法により加熱コークス化し針状生
コークスを得るが、本発明において特定の前処理、すな
わら熱処理によって、原料油のトルエン不溶分が１０〜
２０重量％となるように調整する。The obtained raw material oil is heated together with the raw material oil charged for coking and converted into needle coke by the so-called delayed coking method to obtain needle-shaped raw coke. is 10~
Adjust to 20% by weight.
トルエン不溶分が１０％未満であるバッフィングの効果
は小さく、一方２０％を超えると操業上問題を生じる。When the toluene insoluble content is less than 10%, the effect of buffing is small, while when it exceeds 20%, operational problems occur.
この熱処理は、３５０〜４５０°Ｃ１０，５〜５時間程
度の範囲から選択される。This heat treatment is selected from a range of about 350 to 450° C. for about 5 to 5 hours.
熱処理温度が３５０℃未満では上記調整は困難であり、
４５０℃を超えるとキノリン不溶分が高くなりすぎ好ま
しくない。時間は溶剤不溶分値が目標値になるように選
ばれる。If the heat treatment temperature is less than 350°C, the above adjustment is difficult,
If the temperature exceeds 450°C, the quinoline insoluble content becomes too high, which is not preferable. The time is chosen such that the solvent insolubles value is at the target value.
溶剤不溶分値としては、上記トルエン値が１０〜２０重
量％であることが必要であるが、さらに熱膨張係数の悪
化を避けるためには、２００〜３６０℃留分が２５％以
下でキノリン不溶分が０．５％未満であるように併せて
調整するのが好ましい。この場合、原料調整は２００〜
３６０ ’ｃ留分を２５％以下にしてから行ってもよい
し、２５％以上で熱処理し、その途中あるいは処理後、
２００〜３６０℃留分を除去する方法で２５％以下にし
てもよい。As for the solvent insoluble content value, it is necessary that the above toluene value is 10 to 20% by weight, but in order to further avoid deterioration of the thermal expansion coefficient, the 200 to 360°C fraction should be 25% or less and quinoline insoluble. It is preferable to adjust the amount to be less than 0.5%. In this case, the raw material adjustment is 200~
It may be carried out after reducing the 360'c fraction to 25% or less, or heat treatment at 25% or more, during or after the treatment,
It may be reduced to 25% or less by removing the 200-360°C fraction.
本発明において、上記のように改質した原料油は、コー
クスドラムに供給され常法によりコークス化される。In the present invention, the raw material oil modified as described above is supplied to a coke drum and coked by a conventional method.
改質原料油は、全装入原料油の１／３〜全量の範囲から
選択しうる。The reformed stock oil can be selected from a range of 1/3 to the entire amount of the total charged stock oil.
（実施例）
以下、実施例により本発明により更に詳しく説明するが
、本発明は後記する実施例に限定されるものではない。(Examples) Hereinafter, the present invention will be explained in more detail with reference to Examples, but the present invention is not limited to the Examples described later.
実施例１
キノリン不溶分かＯ、トルエン不溶分が７．２％、２０
０〜３６０°Ｃ留分が２５％のコールタール軟ピツチを
３８０℃の温度で２時間加熱処理した。Example 1 Quinoline insoluble content: O, toluene insoluble content: 7.2%, 20
A coal tar soft pitch with a 0-360°C fraction of 25% was heat-treated at a temperature of 380°C for 2 hours.
その熱処理物のキノリン不溶分ばＯ、トルエン不溶分は
１０．５％、２００〜３６０°Ｃ留分は２２％であった
。この熱処理物をコークス［ラムに供給し４８０°Ｃで
２４時間コーキングした。その後、ロータリーキルンで
１４５０℃で仮焼した。The heat-treated product had a quinoline-insoluble content of O, a toluene-insoluble content of 10.5%, and a 200-360°C fraction of 22%. This heat-treated product was fed to a coke ram and coked at 480°C for 24 hours. Thereafter, it was calcined at 1450°C in a rotary kiln.
この仮焼ニードルコークスを粉砕・篩別し、適宜に粒度
配合を行い、このもの１００部に対し、３２部のハイン
ダーピソチを加えた。混ねつ後、押出成形加工し、２５
１１ＡφＸ１２Ｑｍｍ１のテストピースを作り、焼成後
１０００℃以上の温度範囲は２０℃／分の昇温速度で２
８００°Ｃ迄昇温し２８００°Ｃで３０分保持して黒鉛
化を行った。黒鉛化前後の直径の測定を行ないバッフィ
ングを計算した。さらに、黒鉛化後のラストピースを２
０１ｍψ×１００曹麿１に削り、これを用いて２５〜０
．５°Ｃ間の熱膨張係数を測定した。その結果熱膨張係
数は３．５ ｘ １０−７／”ｃ、黒鉛化前後の直径の
測定を行なったところバッフィングは０．８％であった
。This calcined needle coke was crushed and sieved, the particle size was appropriately mixed, and 32 parts of Hinder Pisochi was added to 100 parts of this coke. After mixing, extrusion processing is performed, 25
A test piece of 11Aφ
The temperature was raised to 800°C and maintained at 2800°C for 30 minutes to perform graphitization. Buffing was calculated by measuring the diameter before and after graphitization. Furthermore, the last piece after graphitization is
01 mψ x 100 Somaro 1.
．． The coefficient of thermal expansion was measured between 5°C. As a result, the thermal expansion coefficient was 3.5 x 10-7/''c, and when the diameter was measured before and after graphitization, the buffing was 0.8%.
実施例２
キノリン不溶分が０、トルエン不溶分が７．１％、２０
０〜３６０℃留分が３５％のコールタール軟ピツチを３
８０°Ｃの温度で２５時間加熱処理した。Example 2 Quinoline insoluble content is 0, toluene insoluble content is 7.1%, 20
3. Coal tar soft pitch with 35% distillation from 0 to 360℃
Heat treatment was performed at a temperature of 80°C for 25 hours.
その熱処理物のキノリン不溶分は０、トルエン不溶分が
１０．１％であった。この熱処理物をコークストラムに
供給し４８０℃で２４時間コーキングした。The heat-treated product had a quinoline insoluble content of 0 and a toluene insoluble content of 10.1%. This heat-treated product was fed to a coke strum and coked at 480°C for 24 hours.
その後、ロータリーキルンで１４５０°Ｃで仮焼した。Thereafter, it was calcined at 1450°C in a rotary kiln.
以下実施例１と同様の操作で評価した。The following evaluation was carried out in the same manner as in Example 1.
熱膨張係数は４．６ Ｘ ｌ Ｏ−’／’Ｃ、バッフィ
ングは１．１％であった。The coefficient of thermal expansion was 4.6 X l O-'/'C, and the buffing was 1.1%.
比較例１
キノリン不ン容分か０、トルエン不溶分が７．２％、２
００〜３６０°Ｃ留分が２５％のコールタール軟ピツチ
をコークス［ラムに供給し４８０°Ｃで２５時間コーキ
ングした。その後ロータリーキルンで１４５０℃で仮焼
した。Comparative Example 1 Quinoline insoluble content: 0, toluene insoluble content: 7.2%, 2
Coal tar soft pitch containing 25% of the 00-360°C fraction was fed to a coke ram and coked at 480°C for 25 hours. Thereafter, it was calcined at 1450°C in a rotary kiln.
実施例１と同様の方法で評価した。Evaluation was made in the same manner as in Example 1.
熱膨張係数は３．５ Ｘ １０−７７’ｃ、バッフィン
グは２．０％であった。The coefficient of thermal expansion was 3.5 x 10-77'c, and the buffing was 2.0%.
（発明の効果）
本発明によれば、原料を熱処理するという非常に簡単な
操作により石炭系針状コークスの熱膨張係数を悪化させ
ずに、バッフィングを低下でき、実質的な黒鉛の維持改
善に極めて有効な方法を提供するものである。また工業
的にも有利で経済的メリットは大である。(Effects of the Invention) According to the present invention, buffing can be reduced without deteriorating the coefficient of thermal expansion of coal-based needle coke by a very simple operation of heat-treating the raw material, resulting in substantial maintenance and improvement of graphite. This provides an extremely effective method. It is also industrially advantageous and has great economic merit.
Claims (3)
ル、コールタールピッチ又はこれらを主体とする炭化水
素物質である原料油をコークスドラムに供給してコーク
ス化する方法において、原料油を熱処理してトルエン不
溶分が１０〜２０重量％となるように調整した後、コー
クスドラムに供給すること特徴とする石炭系ニードルコ
ークスの製造方法。(1) In a method of supplying feedstock oil, which is coal tar, coal tar pitch, or a hydrocarbon substance mainly composed of these, which does not substantially contain quinoline insoluble matter to a coke drum and turning it into coke, the feedstock oil is heat-treated. A method for producing coal-based needle coke, which comprises adjusting the toluene-insoluble content to 10 to 20% by weight, and then supplying the coke to a coke drum.
時間行う請求項１記載の方法。(2) Heat treatment at a temperature of 350 to 450°C for 0.5 to 5
2. The method of claim 1, wherein the method is carried out for an hour.
５重量％以下である請求項１記載の方法。(3) The heat-treated raw oil has a fraction of 200-360℃.
The method according to claim 1, wherein the amount is 5% by weight or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29742388A JPH02142889A (en) | 1988-11-25 | 1988-11-25 | Production of coal-derived needle coke |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29742388A JPH02142889A (en) | 1988-11-25 | 1988-11-25 | Production of coal-derived needle coke |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02142889A true JPH02142889A (en) | 1990-05-31 |
Family
ID=17846317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29742388A Pending JPH02142889A (en) | 1988-11-25 | 1988-11-25 | Production of coal-derived needle coke |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02142889A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010029895A1 (en) * | 2008-09-09 | 2010-03-18 | 新日本石油株式会社 | Process for producing needle coke for graphite electrode and stock oil composition for use in the process |
| KR101353457B1 (en) * | 2011-12-26 | 2014-01-22 | 재단법인 포항산업과학연구원 | Method of preparing needle cokes |
| JP2020164640A (en) * | 2019-03-29 | 2020-10-08 | 三菱ケミカル株式会社 | Method for producing modified pitch |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5770184A (en) * | 1980-10-18 | 1982-04-30 | Mitsubishi Chem Ind Ltd | Preparation of needle coke |
| JPS5898385A (en) * | 1981-12-08 | 1983-06-11 | Mitsubishi Chem Ind Ltd | Preparation of coal-based needle coke |
| JPS6049085A (en) * | 1983-08-29 | 1985-03-18 | Osaka Gas Co Ltd | Method for treating coal tar or coal tar pitch |
| JPS61293293A (en) * | 1985-06-21 | 1986-12-24 | Nippon Steel Chem Co Ltd | Production of pitch coke |
-
1988
- 1988-11-25 JP JP29742388A patent/JPH02142889A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5770184A (en) * | 1980-10-18 | 1982-04-30 | Mitsubishi Chem Ind Ltd | Preparation of needle coke |
| JPS5898385A (en) * | 1981-12-08 | 1983-06-11 | Mitsubishi Chem Ind Ltd | Preparation of coal-based needle coke |
| JPS6049085A (en) * | 1983-08-29 | 1985-03-18 | Osaka Gas Co Ltd | Method for treating coal tar or coal tar pitch |
| JPS61293293A (en) * | 1985-06-21 | 1986-12-24 | Nippon Steel Chem Co Ltd | Production of pitch coke |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010029895A1 (en) * | 2008-09-09 | 2010-03-18 | 新日本石油株式会社 | Process for producing needle coke for graphite electrode and stock oil composition for use in the process |
| JP5298131B2 (en) * | 2008-09-09 | 2013-09-25 | Ｊｘ日鉱日石エネルギー株式会社 | Method for producing needle coke for graphite electrode and raw material oil composition used therefor |
| US8715484B2 (en) | 2008-09-09 | 2014-05-06 | Jx Nippon Oil & Energy Corporation | Process for producing needle coke for graphite electrode and stock oil composition for use in the process |
| KR101433694B1 (en) * | 2008-09-09 | 2014-08-25 | 제이엑스 닛코 닛세키 에네루기 가부시키가이샤 | Process for producing needle coke for graphite electrode and stock oil composition for use in the process |
| KR101353457B1 (en) * | 2011-12-26 | 2014-01-22 | 재단법인 포항산업과학연구원 | Method of preparing needle cokes |
| JP2020164640A (en) * | 2019-03-29 | 2020-10-08 | 三菱ケミカル株式会社 | Method for producing modified pitch |
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