US3771638A - Method and apparatus for preventing coke obstructions in pyrolysis plants - Google Patents

Method and apparatus for preventing coke obstructions in pyrolysis plants Download PDF

Info

Publication number
US3771638A
US3771638A US00094734A US3771638DA US3771638A US 3771638 A US3771638 A US 3771638A US 00094734 A US00094734 A US 00094734A US 3771638D A US3771638D A US 3771638DA US 3771638 A US3771638 A US 3771638A
Authority
US
United States
Prior art keywords
cooler
inlet
coke
cage
pyrolysis
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
Application number
US00094734A
Inventor
H Schneider
R Hussner
R Fischer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wintershall Dea Deutschland AG
Original Assignee
Deutsche Texaco AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Deutsche Texaco AG filed Critical Deutsche Texaco AG
Application granted granted Critical
Publication of US3771638A publication Critical patent/US3771638A/en
Assigned to RWE-DEA AKTIENGESELLSCHAFT FUR MINERALOEL UND CHEMIE reassignment RWE-DEA AKTIENGESELLSCHAFT FUR MINERALOEL UND CHEMIE CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). EFFECTIVE: JUNE 8, 1989, GERMANY Assignors: DEUTSCHE TEXACO AKTIENGESELLSCHAFT GMBH
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C5/00—Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms
    • C07C5/32—Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms by dehydrogenation with formation of free hydrogen
    • C07C5/327—Formation of non-aromatic carbon-to-carbon double bonds only
    • 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
    • C10G9/00—Thermal non-catalytic cracking, in the absence of hydrogen, of hydrocarbon oils
    • C10G9/002—Cooling of cracked gases
    • 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
    • C10G9/00—Thermal non-catalytic cracking, in the absence of hydrogen, of hydrocarbon oils
    • C10G9/14—Thermal non-catalytic cracking, in the absence of hydrogen, of hydrocarbon oils in pipes or coils with or without auxiliary means, e.g. digesters, soaking drums, expansion means
    • C10G9/16—Preventing or removing incrustation
    • 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
    • Y10S55/00—Gas separation
    • Y10S55/20—Spark arrester

Definitions

  • the present invention relates to an improvement of methods for the recovery of olefins from saturated hydrocarbons by means of pyrolysis. It further relates to any other method for pyrolysing organic compounds in the gaseous phase, in which separation of coke is to be expected.
  • the present invention has solved these problems by a device for preventing coke obstructions in pyrolysis plants, characterized by causing the coke to deposit at an easily accessible point in the cracked gas stream between the pyrolysis furnace and the cooler by arranging at said point a screen or sieve medium.
  • a device for preventing coke obstructions in pyrolysis plants characterized by causing the coke to deposit at an easily accessible point in the cracked gas stream between the pyrolysis furnace and the cooler by arranging at said point a screen or sieve medium.
  • the sieve medium of this invention may consist of a hollow structure of wire mesh or a structure consisting of several wire mesh disks. It is also possible to use irregularly joined filaments or even filament balls. Other materials may also be used in place of wire, e.g. ceramic bars or ceramic splinters as packing combined in a wide-meshed flat two-r three-dimensionally extended sieve medium. According to this invention anyone skilled in the art may manufacture a sieve medium such that it presents as large a surface as possible to the cracked gas stream and yet allows said gas stream to pass through.
  • Another embodiment of this invention consists of several wire mesh cages fitted into each other, with the cage meshes increasing in size from the outer to the inner cages.
  • a double cage, wherein the inner cage has wider meshes than the outer cage, is of particular advantage.
  • the sieve medium is removed from the plant as soon as coke crust formations noticeably impede the flow of the cracked gas stream, and is replaced by a new coke-free sieve medium.
  • means for opening and closing have therefore been arranged at the point inside the pyrolysis plant where the sieve medium is placed.
  • the cooler inlet head (1) is attached to the tube sheet, (2) by flange or connecting means not shown.
  • the screen cage (4) stands on feet (3) on said tube sheet (2). Bars (5) are fixed within the cage (4) holding a plate cone (6).
  • the cage (4) is upwardly tapered ending in an inlet nozzle (7). Said inlet nozzle (7 may be sealed to the inlet pipe or conduit (8) of said cooler inlet head (I) by means not shown.
  • Inlet pipe (8) is flanged or disconnectably attached to inlet head (1) by a conventional disconnectable flange (12).
  • the cage (4) consists of iron wire mesh with meshes of 6mm width and a wire thickness of 2mm.
  • Said cage is reinforced by steel rings and steel bands, which arenot shown in the figure.
  • the arrows indicate the approximate directions of the cracked gas stream.
  • a major portion of the cracked gas that leaves hydrocarbon pyrolysis furnace (l0) enters via inlet pipe (8) andinlet nozzle (7) into the cage (4) which cage (4) comprises an inner truncated cone (4a) fitted upon an outer truncated cone (4b), each cone having different opening angles, passes through the cage meshes of the cage inner cone (42 into the space (9) intermediate the cage and the cooler inlet head (1), and from there this major portion of cracked gas returns into the cage outer cone 4b) and finally leaves the cage (4) via the bottom meshes to pass through the cooler (11), which latter is shown in the bottom of the figure.
  • Flanges (l2) detachably connect inlet pipe or conduit (8) to cooler inlet head (1), and flanges (13) detachably connect the inlet head (1) to the cooler (11).
  • the plate cone (6) has been provided for breaking the falling pieces.
  • the embodiment as shown in this example was applied in an ethane pyrolysis plant.
  • the cracked gases leaving the pyrolysis furnace (10) contain approximately 33 mole-% of ethene and have a temperature of 800 i 50 C. when entering the inlet pipe (8) of the cooler inlet head (I).
  • the plant had to be closed down about every 3 weeks because of coke obstructions.
  • the only thing to do was to replace after 3 months the use cage by another coke-free one.
  • An apparatus comprising a hydrocarbon pyrolysis furnace, a cooler having an inlet head, a conduit from said furnace to said cooler inlet head, means for disconnecting said inlet head from said conduit, means for inlet in said cooler inlet head conduit, and a cone fixedly mounted internally of said sieve cage with the apex of said cone being directed toward the inlet of said sieve cage.
  • ABSTRACT line 7, "line” should read t 1'. n g--. ABSTRACT, line 8, "stream” should rea' d -lS1in Col-1mm 2, line 38, "(42)” should read "E”.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)

Abstract

An apparatus for the prevention of coke obstruction in a pyrolysis plant, for example in the cracking of ethane in the manufacture of ethylene, wherein cracked gases from a pyrolysis furnace at a temperature of 750* to 850* C. are passed to a cooler and a screen is disposed in the inlet portion of the cooler at an easily accessible portion whereby the on stream line of the pyrolysis stream is extended.

Description

United States Patent [1 Schneider et al.
[ Nov. 13, 1973 METHOD AND APPARATUS FOR PREVENTING COKE OBSTRUCTIONS IN PYROLYSIS PLANTS [75] Inventors: Hans Schneider; RichardGustav Hussner, both of Heide/Holst; Raimund Erhard Fischer, Hemmingste'dt, all of Germany [73] Assignee: Deutsche Texaco Aktiengesellschaft,
Hamburg, Mittelweg, Germany 22 Filed: Dec. 3, 1970 21 Appl. No.: 94,734
[52] US. Cl 196/98, 55/267, 55/307,
55/521, 55/529, 55/DIG. 2O [51] Int. Cl B01d 46/00 [58] Field of Search 55/1, 267, 268, 269,
55/307, 308, 385, 318, 320, 321, 323, 331, 332, 333, 334, 335, 336, 463, 368, DIG. 20; 202/96, 152, 163, 180, 182, 185, 197, 200; 196/98 [56] References Cited UNITED STATES PATENTS 36,619 10/1862 Marks et a1 55/335 127,966 6/1872 Radley 55/D1G. 20 132,179 10/1872 Radley 55/D1G. 20 367,413 8/1887 Koch 55/308 X 378,762 2/1888 Brown 55/D1G. 20 955,504 4/1910 Dunlap et al. 55/DIG. 20 1,126,692 2/1915 Blanchette 55/307 X 1,281,142 lO/l9l8 2,068,332 l/1937 Kneisley 55/368 X Primary Examiner-Dennis E. Talbert, Jr. AttorneyThomas H. Whaley, Carl G. Ries and H. L. Madinger [5 7 ABSTRACT An apparatus for the prevention of coke obstruction in a pyrolysis plant, for example in the cracking of ethane in the manufacture of ethylene, wherein cracked gases from a pyrolysis furnace at a temperature of 750 to 850 C. are passed to a cooler and a screen is disposed in the inlet portion of the cooler at an easily accessible portion whereby the on stream line of the pyrolysis stream is extended.
1 Claim, 1 Drawing Figure Illlll Ill IlIIlll ll I Illlll METHOD AND APPARATUS FOR PREVENTING COKE OBSTRUCTIONS IN PYROLYSIS PLANTS BACKGROUND OF THE INVENTION In the known processes the hot olefin-containing cracked gases leaving the pyrolysis furnace are passed through a cooler and/or a quenching zone. The pyrolysed gases form coke inside the cooler, which is then separated. At the inlet of the heat exchanger surfaces of the cooler and on said surfaces the coke deposits in a firm crustlike layer or coating continuously increasing in thickness, which results in an ever reduced heat exchange, eventual obstructions and close-down of the plant. It is difficult and costly to remove these coke crusts, as the customary coolers have large heat exchange surfaces arranged over a minimum space.
There are tests known by which to obviate coke crust formation by measures derived from flow technique. This involves cooler inlets being equipped with devices whereby the rate of flow of the cracked gases is kept constant across the section of the cooler. Without these devices the coke crust formation used to be irregular across the section of the cooler, i.e. certain areas in the cooler were covered much faster by coke crusts than were others. With these devices coke crust formation proceeded at an equal rate across the section of the cooler, however, the times needed for covering certain parts of the cooler were slightly prolonged. Thus the close-down of the cooler was, not prevented, but delayed.
SUMMARY OF THE INVENTION The present invention relates to an improvement of methods for the recovery of olefins from saturated hydrocarbons by means of pyrolysis. It further relates to any other method for pyrolysing organic compounds in the gaseous phase, in which separation of coke is to be expected.
It is an object of this invention to prevent or considerably delay coke obstruction of the cooler, in order to extend many times the running times of the furnaces. It is another object of this invention to prevent coke obstruction of other parts of pyrolysis plants.
The present invention has solved these problems by a device for preventing coke obstructions in pyrolysis plants, characterized by causing the coke to deposit at an easily accessible point in the cracked gas stream between the pyrolysis furnace and the cooler by arranging at said point a screen or sieve medium. Surprisingly, the formation of coke crusts now concentrates on this sieve medium and no longer occurs on the parts of the pyrolysis plant arranged behind the sieve medium, as seen in the direction of flow of the cracked gas stream.
The sieve medium of this invention may consist of a hollow structure of wire mesh or a structure consisting of several wire mesh disks. It is also possible to use irregularly joined filaments or even filament balls. Other materials may also be used in place of wire, e.g. ceramic bars or ceramic splinters as packing combined in a wide-meshed flat two-r three-dimensionally extended sieve medium. According to this invention anyone skilled in the art may manufacture a sieve medium such that it presents as large a surface as possible to the cracked gas stream and yet allows said gas stream to pass through.
wall being more or less fitted to the cooler inlet head.
Another embodiment of this invention consists of several wire mesh cages fitted into each other, with the cage meshes increasing in size from the outer to the inner cages. A double cage, wherein the inner cage has wider meshes than the outer cage, is of particular advantage.
According to this invention the sieve medium is removed from the plant as soon as coke crust formations noticeably impede the flow of the cracked gas stream, and is replaced by a new coke-free sieve medium. According to this invention means for opening and closing have therefore been arranged at the point inside the pyrolysis plant where the sieve medium is placed.
The invention is illustrated by the following special example, without limiting the scope thereof.
This example is shown in the figure. The cooler inlet head (1) is attached to the tube sheet, (2) by flange or connecting means not shown. The screen cage (4) stands on feet (3) on said tube sheet (2). Bars (5) are fixed within the cage (4) holding a plate cone (6). The cage (4) is upwardly tapered ending in an inlet nozzle (7). Said inlet nozzle (7 may be sealed to the inlet pipe or conduit (8) of said cooler inlet head (I) by means not shown. Inlet pipe (8) is flanged or disconnectably attached to inlet head (1) by a conventional disconnectable flange (12). The cage (4) consists of iron wire mesh with meshes of 6mm width and a wire thickness of 2mm. Said cage is reinforced by steel rings and steel bands, which arenot shown in the figure. The arrows indicate the approximate directions of the cracked gas stream. A major portion of the cracked gas that leaves hydrocarbon pyrolysis furnace (l0) enters via inlet pipe (8) andinlet nozzle (7) into the cage (4) which cage (4) comprises an inner truncated cone (4a) fitted upon an outer truncated cone (4b), each cone having different opening angles, passes through the cage meshes of the cage inner cone (42 into the space (9) intermediate the cage and the cooler inlet head (1), and from there this major portion of cracked gas returns into the cage outer cone 4b) and finally leaves the cage (4) via the bottom meshes to pass through the cooler (11), which latter is shown in the bottom of the figure. Flanges (l2) detachably connect inlet pipe or conduit (8) to cooler inlet head (1), and flanges (13) detachably connect the inlet head (1) to the cooler (11). Of the coke crusts formed on the wire occasionally larger pieces come off from the upper part of the cage (4) and fall to the bottom of said cage. In order to prevent these pieces from impeding the gas flow too strongly, the plate cone (6) has been provided for breaking the falling pieces. The embodiment as shown in this example was applied in an ethane pyrolysis plant. The cracked gases leaving the pyrolysis furnace (10) contain approximately 33 mole-% of ethene and have a temperature of 800 i 50 C. when entering the inlet pipe (8) of the cooler inlet head (I). When no sieve cage (4) was used, the plant had to be closed down about every 3 weeks because of coke obstructions. When it was used however, the only thing to do was to replace after 3 months the use cage by another coke-free one.
We claim:
1. An apparatus comprising a hydrocarbon pyrolysis furnace, a cooler having an inlet head, a conduit from said furnace to said cooler inlet head, means for disconnecting said inlet head from said conduit, means for inlet in said cooler inlet head conduit, and a cone fixedly mounted internally of said sieve cage with the apex of said cone being directed toward the inlet of said sieve cage.
v UNITED STATES PATENT OFFICE I CERTIFICATE OF CORRECTION Patent no. 3,771,638 bated November 13, 1973 Invenmfls) Hans lE Richard Gustav Hussner; and
RaimunI Erhard Fischer It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:
ABSTRACT, line 7, "line" should read t 1'. n g--. ABSTRACT, line 8, "stream" should rea' d -lS1in Col-1mm 2, line 38, "(42)" should read "E". I
Signd ar1dsea1ed this 30th day of Ju1y 1974.
(SEAL) Attest:
' MCCOY M. GIBSON, JR. C. MARSHALL DANN Attesting Officer Commissioner of Patents

Claims (1)

1. An apparatus comprising a hydrocarbon pyrolysis furnace, a cooler having an inlet head, a conduit from said furnace to said cooler inlet head, means for disconnecting said inlet head from said conduit, means for disconnectably attaching said cooler inlet head to said cooler, a perforated tube sheet secured to the interior surfaces of said inlet cooler head, a plurality of feet mounted on said tube sheet, a wire mesh sieve cage fixedly mounted on said plurality of feet and having an inlet in said cooler inlet head conduit, and a cone fixedly mounted internally of said sieve cage with the apex of said cone being directed toward the inlet of said sieve cage.
US00094734A 1970-12-03 1970-12-03 Method and apparatus for preventing coke obstructions in pyrolysis plants Expired - Lifetime US3771638A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US9473470A 1970-12-03 1970-12-03

Publications (1)

Publication Number Publication Date
US3771638A true US3771638A (en) 1973-11-13

Family

ID=22246845

Family Applications (1)

Application Number Title Priority Date Filing Date
US00094734A Expired - Lifetime US3771638A (en) 1970-12-03 1970-12-03 Method and apparatus for preventing coke obstructions in pyrolysis plants

Country Status (1)

Country Link
US (1) US3771638A (en)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3951630A (en) * 1974-10-29 1976-04-20 G. A. Kleissler Co. Tapered tubular filter element having flared outlet
US5888260A (en) * 1997-05-02 1999-03-30 Sica; Gerardo High performance automotive air intake
US6845813B1 (en) * 2003-10-13 2005-01-25 Knighthawk Engineering Intra-body flow distributor for heat exchanger
WO2005036079A2 (en) * 2003-10-15 2005-04-21 Matsushita Electric Industrial Co., Ltd. Heat pump apparatus
US20130075061A1 (en) * 2010-01-29 2013-03-28 Sppt Pesquisas Tecnologicas Ltda Vibratory heat exchanger unit for low temperature conversion for processing organic waste and process for processing organic waste using a vibratory heat exchanger unit for low temperature conversion
JP2021041305A (en) * 2019-09-06 2021-03-18 株式会社松井製作所 Collection device of granular material
US11203719B2 (en) * 2017-09-29 2021-12-21 Marathon Petroleum Company Lp Tower bottoms coke catching device
US11802257B2 (en) 2022-01-31 2023-10-31 Marathon Petroleum Company Lp Systems and methods for reducing rendered fats pour point
US11860069B2 (en) 2021-02-25 2024-01-02 Marathon Petroleum Company Lp Methods and assemblies for determining and using standardized spectral responses for calibration of spectroscopic analyzers
US11898109B2 (en) 2021-02-25 2024-02-13 Marathon Petroleum Company Lp Assemblies and methods for enhancing control of hydrotreating and fluid catalytic cracking (FCC) processes using spectroscopic analyzers
US11905479B2 (en) 2020-02-19 2024-02-20 Marathon Petroleum Company Lp Low sulfur fuel oil blends for stability enhancement and associated methods
US11905468B2 (en) 2021-02-25 2024-02-20 Marathon Petroleum Company Lp Assemblies and methods for enhancing control of fluid catalytic cracking (FCC) processes using spectroscopic analyzers
US11970664B2 (en) 2021-10-10 2024-04-30 Marathon Petroleum Company Lp Methods and systems for enhancing processing of hydrocarbons in a fluid catalytic cracking unit using a renewable additive
US11975316B2 (en) 2019-05-09 2024-05-07 Marathon Petroleum Company Lp Methods and reforming systems for re-dispersing platinum on reforming catalyst
US12000720B2 (en) 2018-09-10 2024-06-04 Marathon Petroleum Company Lp Product inventory monitoring
US12031676B2 (en) 2019-03-25 2024-07-09 Marathon Petroleum Company Lp Insulation securement system and associated methods
US12031094B2 (en) 2021-02-25 2024-07-09 Marathon Petroleum Company Lp Assemblies and methods for enhancing fluid catalytic cracking (FCC) processes during the FCC process using spectroscopic analyzers

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US36619A (en) * 1862-10-07 Improved spark-arrester
US127966A (en) * 1872-06-18 Improvement in moldings for coffins
US132179A (en) * 1872-10-15 Improvement in spark-arresters for locomotives
US367413A (en) * 1887-08-02 Peters
US378762A (en) * 1888-02-28 Perry j
US955504A (en) * 1909-07-29 1910-04-19 George R Dunlap Spark-arrester.
US1126692A (en) * 1914-07-13 1915-02-02 Joseph Blanchette Spark-arrester.
US1281142A (en) * 1917-12-29 1918-10-08 Dillard H Cox Spark-arrester.
US2068332A (en) * 1936-06-24 1937-01-19 American Floor Surfacing Mach Method and means of collecting dust from an air current

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US36619A (en) * 1862-10-07 Improved spark-arrester
US127966A (en) * 1872-06-18 Improvement in moldings for coffins
US132179A (en) * 1872-10-15 Improvement in spark-arresters for locomotives
US367413A (en) * 1887-08-02 Peters
US378762A (en) * 1888-02-28 Perry j
US955504A (en) * 1909-07-29 1910-04-19 George R Dunlap Spark-arrester.
US1126692A (en) * 1914-07-13 1915-02-02 Joseph Blanchette Spark-arrester.
US1281142A (en) * 1917-12-29 1918-10-08 Dillard H Cox Spark-arrester.
US2068332A (en) * 1936-06-24 1937-01-19 American Floor Surfacing Mach Method and means of collecting dust from an air current

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3951630A (en) * 1974-10-29 1976-04-20 G. A. Kleissler Co. Tapered tubular filter element having flared outlet
US5888260A (en) * 1997-05-02 1999-03-30 Sica; Gerardo High performance automotive air intake
US6845813B1 (en) * 2003-10-13 2005-01-25 Knighthawk Engineering Intra-body flow distributor for heat exchanger
WO2005036079A3 (en) * 2003-10-15 2005-07-07 Matsushita Electric Ind Co Ltd Heat pump apparatus
WO2005036079A2 (en) * 2003-10-15 2005-04-21 Matsushita Electric Industrial Co., Ltd. Heat pump apparatus
US20130075061A1 (en) * 2010-01-29 2013-03-28 Sppt Pesquisas Tecnologicas Ltda Vibratory heat exchanger unit for low temperature conversion for processing organic waste and process for processing organic waste using a vibratory heat exchanger unit for low temperature conversion
US20230220286A1 (en) * 2017-09-29 2023-07-13 Marathon Petroleum Company Lp Tower bottoms coke catching device
US11203719B2 (en) * 2017-09-29 2021-12-21 Marathon Petroleum Company Lp Tower bottoms coke catching device
US20220064542A1 (en) * 2017-09-29 2022-03-03 Marathon Petroleum Company Lp Tower bottoms coke catching device
US11634647B2 (en) * 2017-09-29 2023-04-25 Marathon Petroleum Company Lp Tower bottoms coke catching device
US11891581B2 (en) * 2017-09-29 2024-02-06 Marathon Petroleum Company Lp Tower bottoms coke catching device
US12000720B2 (en) 2018-09-10 2024-06-04 Marathon Petroleum Company Lp Product inventory monitoring
US12031676B2 (en) 2019-03-25 2024-07-09 Marathon Petroleum Company Lp Insulation securement system and associated methods
US11975316B2 (en) 2019-05-09 2024-05-07 Marathon Petroleum Company Lp Methods and reforming systems for re-dispersing platinum on reforming catalyst
JP2021041305A (en) * 2019-09-06 2021-03-18 株式会社松井製作所 Collection device of granular material
US11920096B2 (en) 2020-02-19 2024-03-05 Marathon Petroleum Company Lp Low sulfur fuel oil blends for paraffinic resid stability and associated methods
US11905479B2 (en) 2020-02-19 2024-02-20 Marathon Petroleum Company Lp Low sulfur fuel oil blends for stability enhancement and associated methods
US11860069B2 (en) 2021-02-25 2024-01-02 Marathon Petroleum Company Lp Methods and assemblies for determining and using standardized spectral responses for calibration of spectroscopic analyzers
US11905468B2 (en) 2021-02-25 2024-02-20 Marathon Petroleum Company Lp Assemblies and methods for enhancing control of fluid catalytic cracking (FCC) processes using spectroscopic analyzers
US11921035B2 (en) 2021-02-25 2024-03-05 Marathon Petroleum Company Lp Methods and assemblies for determining and using standardized spectral responses for calibration of spectroscopic analyzers
US11906423B2 (en) 2021-02-25 2024-02-20 Marathon Petroleum Company Lp Methods, assemblies, and controllers for determining and using standardized spectral responses for calibration of spectroscopic analyzers
US11898109B2 (en) 2021-02-25 2024-02-13 Marathon Petroleum Company Lp Assemblies and methods for enhancing control of hydrotreating and fluid catalytic cracking (FCC) processes using spectroscopic analyzers
US11885739B2 (en) 2021-02-25 2024-01-30 Marathon Petroleum Company Lp Methods and assemblies for determining and using standardized spectral responses for calibration of spectroscopic analyzers
US12031094B2 (en) 2021-02-25 2024-07-09 Marathon Petroleum Company Lp Assemblies and methods for enhancing fluid catalytic cracking (FCC) processes during the FCC process using spectroscopic analyzers
US11970664B2 (en) 2021-10-10 2024-04-30 Marathon Petroleum Company Lp Methods and systems for enhancing processing of hydrocarbons in a fluid catalytic cracking unit using a renewable additive
US11802257B2 (en) 2022-01-31 2023-10-31 Marathon Petroleum Company Lp Systems and methods for reducing rendered fats pour point

Similar Documents

Publication Publication Date Title
US3771638A (en) Method and apparatus for preventing coke obstructions in pyrolysis plants
US20110240526A1 (en) Debris Separation Device and Method of Use
US2399560A (en) Apparatus for production of olefins and diolefins
US3392211A (en) Production of ethylene by thermal cracking of hydrocarbons
US2436254A (en) Process and apparatus for the thermal cracking of hydrocarbons
US2123799A (en) Heat treatment of hydrocarbon gases
US4397740A (en) Method and apparatus for cooling thermally cracked hydrocarbon gases
US2490828A (en) Apparatus for contacting gases with solid fluent materials
US3880621A (en) Method for preventing coke obstructions in pyrolysis plants
US2234826A (en) Quenching tower for coking plants
US2639215A (en) Art of protecting the walls of vessels containing fluent granular solids
US2511813A (en) Transfer line connection
US2503188A (en) Apparatus for thermal cracking of hydrocarbons
US2789148A (en) Conversion of hydrocarbons
US1382746A (en) Distillation-oven
US2680706A (en) Device and method for preventing carbon laydown during hydrocarbon conversion
US2493672A (en) Apparatus for hydrocarbon conversion
US2865848A (en) Temperature control in hydrocarbon conversion processes
US2766187A (en) Method and apparatus for hydrocarbon conversion
US2503703A (en) Reactor
US2414816A (en) Method for dehydrogenating normal butenes to form butadiene
US3527832A (en) Coke prevention in steam cracking
US2692849A (en) Method and means for treatment of coal distillation gases and vapors
US1998401A (en) Catalyst roasting plant
US2537079A (en) Prevention of coke formation in pyrolysis of acetone

Legal Events

Date Code Title Description
AS Assignment

Owner name: RWE-DEA AKTIENGESELLSCHAFT FUR MINERALOEL UND CHEM

Free format text: CHANGE OF NAME;ASSIGNOR:DEUTSCHE TEXACO AKTIENGESELLSCHAFT GMBH;REEL/FRAME:005244/0417

Effective date: 19890621