US3451921A - Coke production - Google Patents
Coke production Download PDFInfo
- Publication number
- US3451921A US3451921A US427928A US3451921DA US3451921A US 3451921 A US3451921 A US 3451921A US 427928 A US427928 A US 427928A US 3451921D A US3451921D A US 3451921DA US 3451921 A US3451921 A US 3451921A
- Authority
- US
- United States
- Prior art keywords
- coke
- pyrolysis fuel
- thermal expansion
- employed
- graphite
- 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.)
- Expired - Lifetime
Links
- 239000000571 coke Substances 0.000 title description 33
- 238000004519 manufacturing process Methods 0.000 title description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 18
- 229910002804 graphite Inorganic materials 0.000 description 17
- 239000010439 graphite Substances 0.000 description 17
- 238000000197 pyrolysis Methods 0.000 description 17
- 239000000295 fuel oil Substances 0.000 description 16
- 238000000034 method Methods 0.000 description 16
- 230000003111 delayed effect Effects 0.000 description 11
- 238000004939 coking Methods 0.000 description 8
- 238000005336 cracking Methods 0.000 description 6
- 239000007789 gas Substances 0.000 description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 5
- 238000009835 boiling Methods 0.000 description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 5
- 239000003209 petroleum derivative Substances 0.000 description 5
- 229910052717 sulfur Inorganic materials 0.000 description 5
- 239000011593 sulfur Substances 0.000 description 5
- 229910052720 vanadium Inorganic materials 0.000 description 4
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 4
- 239000011329 calcined coke Substances 0.000 description 3
- -1 ethylene, propylene Chemical group 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 239000003208 petroleum Substances 0.000 description 3
- 238000004227 thermal cracking Methods 0.000 description 3
- 150000001336 alkenes Chemical class 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- 239000003085 diluting agent Substances 0.000 description 2
- 238000004821 distillation Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 125000003118 aryl group Chemical group 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011294 coal tar pitch Substances 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000005087 graphitization Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 239000003701 inert diluent Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000003134 recirculating effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000004901 spalling Methods 0.000 description 1
- 125000000383 tetramethylene group Chemical group [H]C([H])([*:1])C([H])([H])C([H])([H])C([H])([H])[*:2] 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/04—Other carbonising or coking processes; Features of destructive distillation processes in general using charges of special composition
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B55/00—Coking mineral oils, bitumen, tar, and the like or mixtures thereof with solid carbonaceous material
Definitions
- This invention relates to a process for manufacturing coke from pyrolysis fuel oil. More particularly, the invention is concerned with methods for producing so-called delayed coke.
- Delayed coking is a process which employs a preheating treatment and a coking chamber designed to accumulate substantial quantities of coke between cleanings.
- Generall two vertical coke drums are employed, one being in service while the other is decoked.
- Reaction temperatures from 700 F, to 900 F. are employed in the chamber.
- Delayed coke usually is large particled, and has a high density. For this reason it has been employed extensively in the production of graphite electrodes.
- Electrodes carrying current into a furnace become hotter in the center than on the outside. Because of this temperature gradient the center expands more than the outside of the electrode, thereby generating stresses which tend to produce ruptures. Another temperature gradient exists at the arc tip of the electrode; here again an unequal expansion produces stresses which cause spalling. In order to minimize these stresses and keep them Within the limit of the breaking strength of the electrode material, the coefficient of thermal expansion, therefore, should be kept as low as possible.
- the thermal expansion of graphite electrodes depends upon three main factors: l) the kind of coke base material, (2) the method of forming, and (3) the size of the carbonaceous particles employed. Actually there are two values for the coeflicient of thermal expansion of graphite articles, since graphite articles are anisotropic. One value of expansion is parallel to the length; the other parallels the diameter of the article, The longitudinal coefficient of thermal expansion is a fundamental property of the coke from which the electrode is manufactured. The importance of this coefficient is that it directly determines the thermal strains to which an electrode may be subjected during use.
- the process by which the raw material employed in the present invention is obtained is the following: Petroleum distillate fractions are cracked in a tubular furnace in the presence of steam or other inert diluent gas such as methane under severe conditions of thermal cracking, in a range of temperature from 550 C. to 800 C. with the preferred range being from 650 C. to 775 C.
- the purpose of this process is generally to produce olefinic gases, such as ethylene, propylene and butylene
- a heavy high-boiling fraction-pyrolysis fuel oil is condensed from the effluent from the cracking furnace as a by-product.
- the pyrolysis fuel oil is rendered substantially anhydrous by distillation.
- the oil is characterized by a high content of high molecular weight (above 250) condensed polycyclic hydrocarbons containing at least four condensed rings and having a boiling point in excess of 315 C.
- high molecular weight above 250
- condensed polycyclic hydrocarbons containing at least four condensed rings and having a boiling point in excess of 315 C.
- the charge produced and collected as indicated above is fed to a delayed coker of conventional design, having means for the regulation of temperature, pressure and rate of recycling.
- -Raw coke is produced in the coke drum of the delayed coker under a pressure of 30 to 50 pounds per square inch, and calcined at about 1350 C.
- the end product then may be sized and employed, for example, in the fabrication of graphite electrodes.
- Table I below appear data showing the percentage of coke obtained with various samples, the compositions of some of which are given in Table II. Also appearing in Table I are the mean coefficients of thermal expansion (CTE) measured over the temperature range of 15 to C., and specific electrical resistance of graphite rods fabricated from the given cokes, together with the same properties observed in graphite produced from con- ICC 3 ventional coke obtained from vacuum tower bottoms (listed as sample 2318 in the tables). It will be noted from Table I that the sulfur and vanadium content of sample 2318 greatly exceeded that in the samples treated in the manner of the invention.
- CTE coefficients of thermal expansion
- the pyrolysis fuel oils which are generated in the production of olefins by processes other than steam dilution in tubular furnaces as disclosed hereinbefore are suitable for coking in the manner disclosed.
- the pyrolysis fuel oils from processes for olefin production utilizing recirculating granular or powdered ceramic solids, as disclosed in US. Patent 2,432,298 and 2,436,254, or carbonaceous solids (as disclosed in the Petroleum Refiner, vol. 34, October 1955, pp. 139-140) may also be used.
- a process for producing coke having a low sulfur content and a vanadium content of less than 20 parts per million comprising feeding to a delayed coker a pyrolysis fuel oil fraction obtained by cracking petroleum distillate fractions in the presence of a diluent gas at essentially atmospheric pressure and at a temperature range of 650 C. to 775 C. so as to produce olefinic gases and said pyrolysis fuel oil fraction, and coking said pyrolysis fuel oil fraction.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Coke Industry (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Description
United States Patent 3,451,921 COKE PRODUCTION Milton Janes, Lakewood, Ohio, assignor to Union Carbide Corporation, a corporation of New York No Drawing. Filed Jan. 25, 1965, Ser. No. 427,928 Int. Cl. Cg 37/04; C10b 57/04, 55/00 US. Cl. 20846 6 Claims ABSTRACT OF THE DISCLOSURE Heavy high boiling fractions obtained in the cracking of petroleum distillates in the presence of steam and at essentially atmospheric pressure and termed pyrolysis fuel oil can be employed as the charging stock in a delayed coking operation to give a high yield of coke, which after calcining to remove volatile matter and stabilize shrinkage thereof can be employed to manufacture graphite electrodes having an unusually low coefficient of thermal expansion.
This invention relates to a process for manufacturing coke from pyrolysis fuel oil. More particularly, the invention is concerned with methods for producing so-called delayed coke.
Delayed coking is a process which employs a preheating treatment and a coking chamber designed to accumulate substantial quantities of coke between cleanings. Generall two vertical coke drums are employed, one being in service while the other is decoked. Reaction temperatures from 700 F, to 900 F. are employed in the chamber.
Delayed coke usually is large particled, and has a high density. For this reason it has been employed extensively in the production of graphite electrodes.
It is known that many of the phenomena taking place during processing as Well as the final properties of graphite electrodes depend upon the coke used as the filler component in combination with a binder such as coal tar pitch. The effect of variations in the coke used is particularly important in the production of large diameter graphite electrodes for use in electric furnaces. This is especially true since in addition to increasing the size of the electrodes, the operators of electric furnaces are employing higher current densities to shorten the furnace cycle.
Electrodes carrying current into a furnace become hotter in the center than on the outside. Because of this temperature gradient the center expands more than the outside of the electrode, thereby generating stresses which tend to produce ruptures. Another temperature gradient exists at the arc tip of the electrode; here again an unequal expansion produces stresses which cause spalling. In order to minimize these stresses and keep them Within the limit of the breaking strength of the electrode material, the coefficient of thermal expansion, therefore, should be kept as low as possible.
The thermal expansion of graphite electrodes depends upon three main factors: l) the kind of coke base material, (2) the method of forming, and (3) the size of the carbonaceous particles employed. Actually there are two values for the coeflicient of thermal expansion of graphite articles, since graphite articles are anisotropic. One value of expansion is parallel to the length; the other parallels the diameter of the article, The longitudinal coefficient of thermal expansion is a fundamental property of the coke from which the electrode is manufactured. The importance of this coefficient is that it directly determines the thermal strains to which an electrode may be subjected during use.
It has now been found in accordance with this invention that heav high boiling fractions obtained in the cracking of petroleum distillates in the presence of steam and at essentially atmospheric pressure and termed pyrolysis fuel oil can be employed as the charging stock in a delayed coking operation to give a high yield of coke, which after calcining to remove volatile matter and stabilize shrinkage thereof can be employed to manufacture graphite electrodes having an unusually low coeflicient of thermal expansion.
It has also been found that thermal cracking in the pyrolysis furnaces brings about a considerable degree of thermal desulfurization. As a result, the coke produced by the process of the invention is chaarcterized by a relatively low sulfur content. This feature is also advantageous in the. manufacture of graphite electrodes. High sulfur cokes generally are not suitable for the manufac ture of large graphite electrodes because of an expansion phenomenon exhibited by such electrodes during graphitization. In addition, cokes prepared in accordance with the invention are characterized by low ash content. In particular, the vanadium content of cokes so prepared is less than 20 parts per million, also as a result of the thermal cracking.
It is the main object of the present invention to provide coke material having a very low coefficient of thermal expansion, which coke is eminently suitable for use in the manufacturing of carbon electrodes for electric furnaces.
The process by which the raw material employed in the present invention is obtained is the following: Petroleum distillate fractions are cracked in a tubular furnace in the presence of steam or other inert diluent gas such as methane under severe conditions of thermal cracking, in a range of temperature from 550 C. to 800 C. with the preferred range being from 650 C. to 775 C. The purpose of this process is generally to produce olefinic gases, such as ethylene, propylene and butylene, A heavy high-boiling fraction-pyrolysis fuel oil is condensed from the effluent from the cracking furnace as a by-product. Preferably before being charged to a delayed coking furnace, the pyrolysis fuel oil is rendered substantially anhydrous by distillation. The oil is characterized by a high content of high molecular weight (above 250) condensed polycyclic hydrocarbons containing at least four condensed rings and having a boiling point in excess of 315 C. In general the higher the content of polynuclear aromatic carbon compounds in the charging material, the higher the quality of the coke.
The charge produced and collected as indicated above is fed to a delayed coker of conventional design, having means for the regulation of temperature, pressure and rate of recycling. -Raw coke is produced in the coke drum of the delayed coker under a pressure of 30 to 50 pounds per square inch, and calcined at about 1350 C. The end product then may be sized and employed, for example, in the fabrication of graphite electrodes.
As illustrative examples of the successful practice of the present invention, a number of petroleum distillate fractions were cracked at various temperatures to give pyrolysis fuel oils, which were feed to delayed cokers. Graphite rods were fabricated from the resultant coke, in conventional manner. These examples are tabulated in Tables I and II, and labeled samples numbers 2313 to 2368.
Thus in Table I below appear data showing the percentage of coke obtained with various samples, the compositions of some of which are given in Table II. Also appearing in Table I are the mean coefficients of thermal expansion (CTE) measured over the temperature range of 15 to C., and specific electrical resistance of graphite rods fabricated from the given cokes, together with the same properties observed in graphite produced from con- ICC 3 ventional coke obtained from vacuum tower bottoms (listed as sample 2318 in the tables). It will be noted from Table I that the sulfur and vanadium content of sample 2318 greatly exceeded that in the samples treated in the manner of the invention.
TABLE I Analysis of calcined coke, Temp. percent Sample cracking Coke No. Feed to thermal cracker 0.) yield Ash Sulfur 2313 Light petroleum dist 750 28. 2 O. 29 0. 25 2314 .d 775 33. 1 0. 14 0.21 750 36. 7 0. l5 0. 78 775 41. 0.25 0. 70 750 40. l 0. 20 0. 92 650 39. 0 0. l8 1. 07 675 45. 0.30 0.90 735 47. 5 0.30 1. 00 760 49. 5 0. 15 0.97 d 775 42. 8 0. 56 0. 59
l e. 2368. Light gas oil, West Texas 775 31. 0 0. 24 0. 7O
erude. 2318. Coke from vacuum tower 21. 5 0. 32 1. 25
bottoms.
Analysis of Properties of graphite rods calcined coke, parts per million CTE C.) Specific resistance vanadium 10 ohm-em. X10
TABLE II.ANALYTICAL DATA ON SAMPLES OF PYROL- YSIS FUEL OILS AND VACUUM TOWER BOTTOMS 1 The analytical data here presented are for samples dried to remove water.
Analysis of oils 1 Analysis of calcined coke Percent conradson Percent Percent V carbon as P p.m. V
fiThe analytical data here presented are for samples dried to remove wa er.
The pyrolysis fuel oils shown in Table I yield cokes which on the average show a longitudinal (in the direction of extrusion) coefficient of thermal expansion of 6.0 1O-' C.)- Empirically, it has been established that this coefiicient of thermal expansion measured on rods will correlate with field experience with full sized graphite electrodes employed in electric arc furnaces. A coefficient of thermal expansion of 6.0 indicates that high quality graphite electrodes can be manufactured from such cokes. In comparison, cokes produced from the residues from distillation of petroleum .(reduced eludes) generally show coeflicients of thermal expansion in the range of 12 to 20x 10 C.)
It will be obvious to those skilled in the art that under less severe conditions of temperature with longer times of contact, slightly lower temperatures can be utilized to produce highly aromatic cracked stocks suitable for coking to produce coke equivalent to that of the process of the invention. Furthermore, the pyrolysis fuel oils which are generated in the production of olefins by processes other than steam dilution in tubular furnaces as disclosed hereinbefore are suitable for coking in the manner disclosed. For example, the pyrolysis fuel oils from processes for olefin production utilizing recirculating granular or powdered ceramic solids, as disclosed in US. Patent 2,432,298 and 2,436,254, or carbonaceous solids (as disclosed in the Petroleum Refiner, vol. 34, October 1955, pp. 139-140) may also be used.
What is claimed is:
1. A process for producing coke having a low sulfur content and a vanadium content of less than 20 parts per million, comprising feeding to a delayed coker a pyrolysis fuel oil fraction obtained by cracking petroleum distillate fractions in the presence of a diluent gas at essentially atmospheric pressure and at a temperature range of 650 C. to 775 C. so as to produce olefinic gases and said pyrolysis fuel oil fraction, and coking said pyrolysis fuel oil fraction.
2. The process of claim 1 wherein said pyrolysis fuel oil is anhydrous.
3. The process of claim 1 wherein said pyrolysis fuel oil fraction has a molecular Weight of above 250 and a boiling point in excess of about 315 C.
4. The process of claim 1 wherein said cracking is effected in the presence of methane.
5. The process of claim 1 wherein said diluent gas is steam.
6. The process of claim 1 wherein said pyrolysis fuel oil is dried prior to feeding to said delayed coker.
References Cited UNITED STATES PATENTS HERBERT LEVINE, Primary Examiner.
US. Cl. X.R. 208-50, 131
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US42792865A | 1965-01-25 | 1965-01-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3451921A true US3451921A (en) | 1969-06-24 |
Family
ID=23696869
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US427928A Expired - Lifetime US3451921A (en) | 1965-01-25 | 1965-01-25 | Coke production |
Country Status (6)
Country | Link |
---|---|
US (1) | US3451921A (en) |
JP (1) | JPS5125361B1 (en) |
BE (1) | BE675451A (en) |
DE (1) | DE1571689B1 (en) |
GB (1) | GB1137082A (en) |
NL (1) | NL6600946A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4043898A (en) * | 1975-08-25 | 1977-08-23 | Continental Oil Company | Control of feedstock for delayed coking |
US4740293A (en) * | 1981-12-29 | 1988-04-26 | Union Carbide Corporation | Premium coke from a blend of pyrolysis tar and hydrotreated decant oil |
US4874505A (en) * | 1988-02-02 | 1989-10-17 | Mobil Oil Corporation | Recycle of oily refinery wastes |
US20080026088A1 (en) * | 2006-06-20 | 2008-01-31 | Metaproteomics, Llc | Reduced isoalpha acid based protein kinase modulation cancer treatment |
US20090000425A1 (en) * | 2004-05-12 | 2009-01-01 | Sgl Carbon Ag | Graphite Electrode for Electrothermic Reduction Furnaces, Electrode Column, and Method of Producing Graphite Electrodes |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NZ217510A (en) * | 1985-09-12 | 1989-09-27 | Comalco Alu | Process for producing high purity coke by flash pyrolysis-delayed coking method |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2775549A (en) * | 1954-01-25 | 1956-12-25 | Great Lakes Carbon Corp | Production of coke from petroleum hydrocarbons |
US3326796A (en) * | 1964-06-22 | 1967-06-20 | Great Lakes Carbon Corp | Production of electrode grade petroleum coke |
US3349024A (en) * | 1964-11-17 | 1967-10-24 | Phillips Petroleum Co | Maintaining pressure in a hydrocarbon thermalcracking zone |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2198557A (en) * | 1938-09-13 | 1940-04-23 | Florez Engineering Co Inc De | Cracking hydrocarbon oils |
DE1111146B (en) * | 1954-03-22 | 1961-07-20 | Exxon Research Engineering Co | Process for the heat treatment of fluidized bed petroleum coke for the production of electrodes |
AT199161B (en) * | 1956-09-19 | 1958-08-25 | Great Lakes Carbon Corp | Process for the production of a petroleum coke with a needle-like structure |
FR76254E (en) * | 1958-05-08 | 1961-09-29 | Bataafsche Petroleum | Process for the production of petroleum coke which can be transformed into moderator graphite for nuclear reactors |
NL230995A (en) * | 1958-05-08 | |||
GB874439A (en) * | 1958-09-03 | 1961-08-10 | Shell Int Research | Improvements in or relating to the production of petroleum coke |
US3116231A (en) * | 1960-08-22 | 1963-12-31 | Continental Oil Co | Manufacture of petroleum coke |
FR1314633A (en) * | 1962-01-19 | 1963-01-11 | Continental Oil Co | Coke production process |
-
1965
- 1965-01-25 US US427928A patent/US3451921A/en not_active Expired - Lifetime
-
1966
- 1966-01-13 DE DE1966U0012363 patent/DE1571689B1/en active Pending
- 1966-01-21 BE BE675451D patent/BE675451A/xx unknown
- 1966-01-21 GB GB2758/66A patent/GB1137082A/en not_active Expired
- 1966-01-25 JP JP41003927A patent/JPS5125361B1/ja active Pending
- 1966-01-25 NL NL6600946A patent/NL6600946A/xx unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2775549A (en) * | 1954-01-25 | 1956-12-25 | Great Lakes Carbon Corp | Production of coke from petroleum hydrocarbons |
US3326796A (en) * | 1964-06-22 | 1967-06-20 | Great Lakes Carbon Corp | Production of electrode grade petroleum coke |
US3349024A (en) * | 1964-11-17 | 1967-10-24 | Phillips Petroleum Co | Maintaining pressure in a hydrocarbon thermalcracking zone |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4043898A (en) * | 1975-08-25 | 1977-08-23 | Continental Oil Company | Control of feedstock for delayed coking |
US4740293A (en) * | 1981-12-29 | 1988-04-26 | Union Carbide Corporation | Premium coke from a blend of pyrolysis tar and hydrotreated decant oil |
US4874505A (en) * | 1988-02-02 | 1989-10-17 | Mobil Oil Corporation | Recycle of oily refinery wastes |
US20090000425A1 (en) * | 2004-05-12 | 2009-01-01 | Sgl Carbon Ag | Graphite Electrode for Electrothermic Reduction Furnaces, Electrode Column, and Method of Producing Graphite Electrodes |
US7794519B2 (en) * | 2004-05-12 | 2010-09-14 | Sgl Carbon Se | Graphite electrode for electrothermic reduction furnaces, electrode column, and method of producing graphite electrodes |
US20080026088A1 (en) * | 2006-06-20 | 2008-01-31 | Metaproteomics, Llc | Reduced isoalpha acid based protein kinase modulation cancer treatment |
Also Published As
Publication number | Publication date |
---|---|
DE1571689B1 (en) | 1970-11-12 |
NL6600946A (en) | 1966-07-26 |
BE675451A (en) | 1966-05-16 |
GB1137082A (en) | 1968-12-18 |
JPS5125361B1 (en) | 1976-07-30 |
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Legal Events
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Owner name: MORGAN GUARANTY TRUST COMPANY OF NEW YORK, AND MOR Free format text: MORTGAGE;ASSIGNORS:UNION CARBIDE CORPORATION, A CORP.,;STP CORPORATION, A CORP. OF DE.,;UNION CARBIDE AGRICULTURAL PRODUCTS CO., INC., A CORP. OF PA.,;AND OTHERS;REEL/FRAME:004547/0001 Effective date: 19860106 |
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Owner name: UNION CARBIDE CORPORATION, Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:MORGAN BANK (DELAWARE) AS COLLATERAL AGENT;REEL/FRAME:004665/0131 Effective date: 19860925 |