CA2219011A1 - Method to vapor-phase deliver heater antifoulants - Google Patents
Method to vapor-phase deliver heater antifoulants Download PDFInfo
- Publication number
- CA2219011A1 CA2219011A1 CA002219011A CA2219011A CA2219011A1 CA 2219011 A1 CA2219011 A1 CA 2219011A1 CA 002219011 A CA002219011 A CA 002219011A CA 2219011 A CA2219011 A CA 2219011A CA 2219011 A1 CA2219011 A1 CA 2219011A1
- Authority
- CA
- Canada
- Prior art keywords
- hydrocarbon fluid
- antifoulant
- hydrocarbon
- processing equipment
- processing
- 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.)
- Abandoned
Links
- 238000000034 method Methods 0.000 title claims abstract description 92
- 239000012808 vapor phase Substances 0.000 title claims abstract description 17
- 229930195733 hydrocarbon Natural products 0.000 claims abstract description 156
- 239000004215 Carbon black (E152) Substances 0.000 claims abstract description 155
- 150000002430 hydrocarbons Chemical class 0.000 claims abstract description 155
- 239000012530 fluid Substances 0.000 claims abstract description 123
- 239000002519 antifouling agent Substances 0.000 claims abstract description 75
- 125000000217 alkyl group Chemical group 0.000 claims abstract description 50
- 239000000571 coke Substances 0.000 claims abstract description 46
- 239000001257 hydrogen Substances 0.000 claims abstract description 26
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 26
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 24
- 239000000203 mixture Substances 0.000 claims abstract description 23
- 150000001875 compounds Chemical class 0.000 claims abstract description 22
- 125000004432 carbon atom Chemical group C* 0.000 claims abstract description 19
- MXWLJBLIKWUVIO-UHFFFAOYSA-N (2,3,4-tritert-butylphenyl) dihydrogen phosphate Chemical class CC(C)(C)C1=CC=C(OP(O)(O)=O)C(C(C)(C)C)=C1C(C)(C)C MXWLJBLIKWUVIO-UHFFFAOYSA-N 0.000 claims abstract description 12
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims abstract 10
- 239000007789 gas Substances 0.000 claims description 12
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 8
- 239000005977 Ethylene Substances 0.000 claims description 8
- 230000003197 catalytic effect Effects 0.000 claims description 7
- 230000003111 delayed effect Effects 0.000 claims description 7
- 230000002401 inhibitory effect Effects 0.000 claims description 7
- 238000005235 decoking Methods 0.000 claims description 6
- 239000011261 inert gas Substances 0.000 claims description 5
- 239000003350 kerosene Substances 0.000 claims description 5
- 239000001273 butane Substances 0.000 claims description 4
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 claims description 4
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 claims description 4
- 150000003014 phosphoric acid esters Chemical class 0.000 claims description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 claims 4
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 claims 2
- 239000001294 propane Substances 0.000 claims 2
- 239000010779 crude oil Substances 0.000 description 45
- 239000000463 material Substances 0.000 description 16
- 239000003208 petroleum Substances 0.000 description 16
- 239000000654 additive Substances 0.000 description 14
- 238000002347 injection Methods 0.000 description 12
- 239000007924 injection Substances 0.000 description 12
- 239000000047 product Substances 0.000 description 12
- 150000002431 hydrogen Chemical group 0.000 description 11
- 239000003921 oil Substances 0.000 description 11
- -1 aralkyl phosphate esters Chemical class 0.000 description 10
- 230000000996 additive effect Effects 0.000 description 9
- 238000010438 heat treatment Methods 0.000 description 9
- 238000004140 cleaning Methods 0.000 description 8
- 150000002148 esters Chemical class 0.000 description 8
- 239000011295 pitch Substances 0.000 description 8
- 238000000197 pyrolysis Methods 0.000 description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 5
- 229910019142 PO4 Inorganic materials 0.000 description 5
- 238000009835 boiling Methods 0.000 description 5
- 238000004939 coking Methods 0.000 description 5
- 239000010452 phosphate Substances 0.000 description 5
- 238000005336 cracking Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 230000004580 weight loss Effects 0.000 description 3
- 241000196324 Embryophyta Species 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 125000002877 alkyl aryl group Chemical group 0.000 description 2
- 125000003118 aryl group Chemical group 0.000 description 2
- 125000000753 cycloalkyl group Chemical group 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 150000005690 diesters Chemical class 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- LWSYSCQGRROTHV-UHFFFAOYSA-N ethane;propane Chemical compound CC.CCC LWSYSCQGRROTHV-UHFFFAOYSA-N 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000002343 natural gas well Substances 0.000 description 2
- 238000005504 petroleum refining Methods 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229920005862 polyol Polymers 0.000 description 2
- 239000003079 shale oil Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000011275 tar sand Substances 0.000 description 2
- PXZZRISEDBDRLY-UHFFFAOYSA-N (2-tert-butylphenyl) dihydrogen phosphate Chemical class CC(C)(C)C1=CC=CC=C1OP(O)(O)=O PXZZRISEDBDRLY-UHFFFAOYSA-N 0.000 description 1
- JJULABXIXFRDCQ-UHFFFAOYSA-N 2,3,4-tritert-butylphenol Chemical compound CC(C)(C)C1=CC=C(O)C(C(C)(C)C)=C1C(C)(C)C JJULABXIXFRDCQ-UHFFFAOYSA-N 0.000 description 1
- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 description 1
- 241000102319 Ampelisca typica Species 0.000 description 1
- 241001550224 Apha Species 0.000 description 1
- 101100134298 Bacillus subtilis (strain 168) nucA gene Proteins 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical class [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical class [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 1
- 101100029872 Dictyostelium discoideum pitC gene Proteins 0.000 description 1
- 241001547070 Eriodes Species 0.000 description 1
- MBMLMWLHJBBADN-UHFFFAOYSA-N Ferrous sulfide Chemical class [Fe]=S MBMLMWLHJBBADN-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 125000003342 alkenyl group Chemical group 0.000 description 1
- 239000007866 anti-wear additive Substances 0.000 description 1
- 239000008346 aqueous phase Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910002090 carbon oxide Inorganic materials 0.000 description 1
- 150000001733 carboxylic acid esters Chemical class 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 150000001879 copper Chemical class 0.000 description 1
- 230000009089 cytolysis Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 239000007857 degradation product Substances 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 1
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- 235000013980 iron oxide Nutrition 0.000 description 1
- VBMVTYDPPZVILR-UHFFFAOYSA-N iron(2+);oxygen(2-) Chemical class [O-2].[Fe+2] VBMVTYDPPZVILR-UHFFFAOYSA-N 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000002101 lytic effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000004058 oil shale Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- CMPQUABWPXYYSH-UHFFFAOYSA-N phenyl phosphate Chemical class OP(O)(=O)OC1=CC=CC=C1 CMPQUABWPXYYSH-UHFFFAOYSA-N 0.000 description 1
- 150000008301 phosphite esters Chemical class 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 150000003077 polyols Chemical class 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 231100000241 scar Toxicity 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 1
- 229910001948 sodium oxide Inorganic materials 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000004901 spalling Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical class S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
- 229910052815 sulfur oxide Inorganic materials 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 238000004227 thermal cracking Methods 0.000 description 1
- KUAZQDVKQLNFPE-UHFFFAOYSA-N thiram Chemical compound CN(C)C(=S)SSC(=S)N(C)C KUAZQDVKQLNFPE-UHFFFAOYSA-N 0.000 description 1
- 239000013638 trimer Substances 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G75/00—Inhibiting corrosion or fouling in apparatus for treatment or conversion of hydrocarbon oils, in general
- C10G75/04—Inhibiting corrosion or fouling in apparatus for treatment or conversion of hydrocarbon oils, in general by addition of antifouling agents
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G29/00—Refining of hydrocarbon oils, in the absence of hydrogen, with other chemicals
- C10G29/20—Organic compounds not containing metal atoms
- C10G29/22—Organic compounds not containing metal atoms containing oxygen as the only hetero atom
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S585/00—Chemistry of hydrocarbon compounds
- Y10S585/949—Miscellaneous considerations
- Y10S585/95—Prevention or removal of corrosion or solid deposits
Landscapes
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/734,056 | 1996-10-18 | ||
| US08/734,056 US5863416A (en) | 1996-10-18 | 1996-10-18 | Method to vapor-phase deliver heater antifoulants |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2219011A1 true CA2219011A1 (en) | 1998-04-18 |
Family
ID=24950138
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002219011A Abandoned CA2219011A1 (en) | 1996-10-18 | 1997-10-17 | Method to vapor-phase deliver heater antifoulants |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US5863416A (https=) |
| EP (1) | EP0837119A3 (https=) |
| JP (1) | JPH10176174A (https=) |
| KR (1) | KR100453302B1 (https=) |
| CA (1) | CA2219011A1 (https=) |
| SG (1) | SG55397A1 (https=) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6852213B1 (en) * | 1999-09-15 | 2005-02-08 | Nalco Energy Services | Phosphorus-sulfur based antifoulants |
| US20030234171A1 (en) * | 2002-06-19 | 2003-12-25 | Owen Steven A. | Cracking furnace antifoulant injection system |
| US8192613B2 (en) * | 2008-02-25 | 2012-06-05 | Baker Hughes Incorporated | Method for reducing fouling in furnaces |
| US8092618B2 (en) * | 2009-10-21 | 2012-01-10 | Nalco Company | Surface passivation technique for reduction of fouling |
Family Cites Families (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3531394A (en) * | 1968-04-25 | 1970-09-29 | Exxon Research Engineering Co | Antifoulant additive for steam-cracking process |
| US3837803A (en) * | 1972-07-11 | 1974-09-24 | Betz Laboratories | Orthophosphate corrosion inhibitors and their use |
| US3951837A (en) * | 1973-09-24 | 1976-04-20 | Mcdonnell Douglas Corporation | Functional fluid compositions |
| US3957668A (en) * | 1973-09-24 | 1976-05-18 | Mcdonnell Douglas Corporation | Novel epoxy compounds and functional fluid compositions containing such compounds |
| US4024049A (en) * | 1975-01-07 | 1977-05-17 | Nalco Chemical Company | Mono and di organophosphite esters as crude oil antifoulants |
| US4024050A (en) * | 1975-01-07 | 1977-05-17 | Nalco Chemical Company | Phosphorous ester antifoulants in crude oil refining |
| US4024051A (en) * | 1975-01-07 | 1977-05-17 | Nalco Chemical Company | Using an antifoulant in a crude oil heating process |
| US4024048A (en) * | 1975-01-07 | 1977-05-17 | Nalco Chemical Company | Organophosphorous antifoulants in hydrodesulfurization |
| US4105540A (en) * | 1977-12-15 | 1978-08-08 | Nalco Chemical Company | Phosphorus containing compounds as antifoulants in ethylene cracking furnaces |
| US4176045A (en) * | 1978-07-10 | 1979-11-27 | Pullman Incorporated | Pyrolysis coke inhibition |
| US4226700A (en) * | 1978-08-14 | 1980-10-07 | Nalco Chemical Company | Method for inhibiting fouling of petrochemical processing equipment |
| US4303568A (en) * | 1979-12-10 | 1981-12-01 | Betz Laboratories, Inc. | Corrosion inhibition treatments and method |
| US4452253A (en) * | 1980-04-04 | 1984-06-05 | The Kendall Company | Collection bag |
| US4451442A (en) * | 1982-06-21 | 1984-05-29 | The Dow Chemical Company | Removal of hydrogen sulfide from fluid streams with minimum production of solids |
| DD222324A1 (de) * | 1983-12-30 | 1985-05-15 | Adw D Ddr Zi F Org Chemie | Verfahren zur herstellung von niederen olefinen und aromaten |
| US4599480A (en) * | 1985-07-12 | 1986-07-08 | Shell Oil Company | Sequential cracking of hydrocarbons |
| US4842716A (en) * | 1987-08-13 | 1989-06-27 | Nalco Chemical Company | Ethylene furnace antifoulants |
| US4828674A (en) * | 1988-04-04 | 1989-05-09 | Betz Laboratories, Inc. | Method for controlling fouling deposit formation in a liquid hydrocarbonaceous medium |
| US4835332A (en) * | 1988-08-31 | 1989-05-30 | Nalco Chemical Company | Use of triphenylphosphine as an ethylene furnace antifoulant |
| US4830838A (en) * | 1988-11-01 | 1989-05-16 | The Dow Chemical Company | Removal of hydrogen sulfide from fluid streams with minimum production of solids |
| US4900426A (en) * | 1989-04-03 | 1990-02-13 | Nalco Chemical Company | Triphenylphosphine oxide as an ethylene furnace antifoulant |
| US5360531A (en) * | 1992-12-10 | 1994-11-01 | Nalco Chemical Company | Phosphoric triamide coking inhibitors |
| EP0626990A1 (en) * | 1992-12-18 | 1994-12-07 | Amoco Corporation | Thermal cracking process with reduced coking |
| US5354450A (en) * | 1993-04-07 | 1994-10-11 | Nalco Chemical Company | Phosphorothioate coking inhibitors |
| US5593568A (en) * | 1994-05-13 | 1997-01-14 | Nalco Chemical Company | Coker/visbreaker and ethylene furnace antifoulant |
| US5460712A (en) * | 1994-11-30 | 1995-10-24 | Nalco Chemical Company | Coker/visbreaker and ethylene furnace antifoulant |
-
1996
- 1996-10-18 US US08/734,056 patent/US5863416A/en not_active Expired - Fee Related
-
1997
- 1997-10-17 EP EP97118089A patent/EP0837119A3/en not_active Withdrawn
- 1997-10-17 CA CA002219011A patent/CA2219011A1/en not_active Abandoned
- 1997-10-18 KR KR1019970053483A patent/KR100453302B1/ko not_active Expired - Fee Related
- 1997-10-18 SG SG1997003793A patent/SG55397A1/en unknown
- 1997-10-20 JP JP9287114A patent/JPH10176174A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| SG55397A1 (en) | 1998-12-21 |
| KR19980032947A (ko) | 1998-07-25 |
| US5863416A (en) | 1999-01-26 |
| MX9708014A (es) | 1998-07-31 |
| EP0837119A2 (en) | 1998-04-22 |
| EP0837119A3 (en) | 1999-01-20 |
| KR100453302B1 (ko) | 2004-12-17 |
| JPH10176174A (ja) | 1998-06-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |