US20100078356A1 - Process for the distillation of decanted oils for the production of petroleum pitches - Google Patents

Process for the distillation of decanted oils for the production of petroleum pitches Download PDF

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Publication number
US20100078356A1
US20100078356A1 US12/497,770 US49777009A US2010078356A1 US 20100078356 A1 US20100078356 A1 US 20100078356A1 US 49777009 A US49777009 A US 49777009A US 2010078356 A1 US2010078356 A1 US 2010078356A1
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US
United States
Prior art keywords
distillation
compounds
still
pitch
coil
Prior art date
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Abandoned
Application number
US12/497,770
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English (en)
Inventor
Luiz Depine de Castro
Carlos Henrique Monteiro de Castro Dutra
Luiz Clovis de Freitas
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.)
Petroleo Brasileiro SA Petrobras
Original Assignee
Petroleo Brasileiro SA Petrobras
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Filing date
Publication date
Application filed by Petroleo Brasileiro SA Petrobras filed Critical Petroleo Brasileiro SA Petrobras
Assigned to PETROLEO BRASILEIRO S.A. - PETROBRAS reassignment PETROLEO BRASILEIRO S.A. - PETROBRAS ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DE CASTRO, LUIZ DEPINE, DE FREITAS, LUIZ CLOVIS, DUTRA, CARLOS HENRIQUE MONTEIRO DE CASTRO
Publication of US20100078356A1 publication Critical patent/US20100078356A1/en
Abandoned legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10C—WORKING-UP PITCH, ASPHALT, BITUMEN, TAR; PYROLIGNEOUS ACID
    • C10C3/00—Working-up pitch, asphalt, bitumen
    • C10C3/06—Working-up pitch, asphalt, bitumen by distillation
    • 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
    • C10G7/00—Distillation of hydrocarbon oils
    • C10G7/12—Controlling or regulating

Definitions

  • This invention has scope for application in the processes for the distillation of decanted oil with the aim of increasing the production yield and quality of the pitches obtained.
  • Pitches are used for the production of carbon artefacts, especially for the production of carbon fibres having excellent mechanical properties. They also have application as binders in the industries for the production of anodes, aluminium and graphite electrodes for the steel industry.
  • pitches conventionally uses coal tar as a raw material.
  • pitches from decanted oil involves a processing stage in which the raw material is distilled with removal of the lighter compounds, leaving as the end product a pitch which has solid properties at ambient temperature.
  • the mean yield from a conventional process such as that described above is approximately 20% of pitch.
  • the flow from this heater is transferred to a distillation column where it is distilled at a specific pressure and temperature so that the light fractions derived from the heavy fraction are separated out as product from the top of this column and the heavy fraction is collected from the bottom of the column as an intermediate pitch.
  • bituminous material is subjected to hydrogenation treatment at a particular temperature and pressure with the addition of a solvent based on a hydrogen donor, essentially yielding an isotropic hydrogenated pitch and finally, in a fourth stage, the compound from the third stage is subjected to heat treatment in a temperature range from 350° C. to 500° C. under a pressure above atmospheric to convert it into a pitch binder.
  • U.S. Pat. No. 5,259,947 discloses a solvated mesophase pitch having a liquid-crystalline structure comprising a vehicle of mesogens, pseudo-mesogens or a mixture thereof in which the solvated mesophase pitch is at least 40% by volume optically anisotropic and in which the solvated mesophase pitch melts at at least 40° C.
  • the solvated mesophase pitch contains pseudo-mesogens, where the solvated mesophase pitch melts or softens and the pseudo-mesogen component does not; where the solvent dissolves in the mesogen or pseudo-mesogen and gives rise to a lower melting point when it retains a substantial volume of liquid-crystalline structure.
  • This invention relates to a process for the distillation of decanted oil in order to increase the yield of the production of pitch binders with excellent physical and chemical qualities which makes them suitable for use in various industrial applications.
  • the above aim has been accomplished through developing a distillation process which basically comprises the introduction of a stage of the condensing the light and volatile compounds deriving from the distillation of decanted oil, these light compounds being recycled to the hot zone of the still where they react with the raw material forming a mixture which has less viscosity than the reaction system, which acts as a solvent phase.
  • This stage is carried out at a particular temperature and for a particular time.
  • FIG. 1 is a diagrammatical view of the distillation system according to this invention.
  • FIG. 2 shows a graph of heating in a first distillation experiment with a cooling coil according to this invention, in which graphs of the temperature within the still and the temperature at the top of the distillation column are plotted.
  • FIG. 3 illustrates a graph of heating in a second distillation experiment with a cooling coil according to this invention, in which graphs of the temperature within the still and the temperature at the top of the distillation column are plotted.
  • FIG. 4 illustrates a graph of heating in a third distillation experiment with a cooling coil according to this invention, in which graphs of the temperature within the still and the temperature at the top of the distillation column are plotted.
  • FIG. 5 shows a graph of heating in a fourth distillation experiment with a cooling coil according to this invention, in which graphs of the temperature within the still and the temperature at the top of the distillation column are plotted.
  • This invention relates to a process for the distillation of decanted oil with a view to increasing the production yield of pitches having excellent physical and chemical properties.
  • pitches can be produced using coal tar and heavy oil residues. Heavy oil residues or residues from its processing have been widely used as a primary material for obtaining pitches.
  • the majority of the technical work which uses petroleum pitch in its experiments mentions the use of commercial pitches as a raw material.
  • the production of pitches from decanted oil as raw material involves a distillation which removes lighter compounds and makes it possible to form a heavy material, a pitch which is in the solid state at ambient temperature.
  • the yield of pitch obtained from conventional distillation is of the order of 20%.
  • a vacuum which although accelerating the distillation process also results in even lower yields than in the conventional process may be applied during distillation.
  • the process according to this invention is based on heat treatment with reflux.
  • Heating of the decanted oil and reflux allows light molecules which would be withdrawn from the system by being volatilised to return and remain within the still. This reduces excessive condensation of the heavier molecules, purely because of the presence of these lighter molecules which have considerable aromaticity and naphthenic hydrogens which improve the physical and chemical properties of the pitch.
  • FIG. 4 shows the heating graph for this Run 5 in which the change in the temperature within the still (T int ) is plotted on the graph in the form of squares and the change in the temperature at the top of the column (T top ) is plotted in the form of solid circles.
  • this invention has been described in the form of its preferred embodiment, the main concept underlying this invention, which is a process for the distillation of decanted oil with the object of increasing the efficiency of the production of pitches having excellent physical and chemical properties rendering them suitable for use in various industrial applications, including the manufacture of carbon fibres, retains its innovative nature, while those skilled in the art may envisage and make variations, modifications, changes, adaptations and the like which are necessary and compatible with the method of working in question without however going beyond the spirit and scope of this invention which is represented by the following claims.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Working-Up Tar And Pitch (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
US12/497,770 2008-10-01 2009-07-06 Process for the distillation of decanted oils for the production of petroleum pitches Abandoned US20100078356A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BRPI0804234-9A BRPI0804234A2 (pt) 2008-10-01 2008-10-01 processo de destilação de óleos decantados para produção de piches de petróleo
BRPI0804234-9 2008-10-01

Publications (1)

Publication Number Publication Date
US20100078356A1 true US20100078356A1 (en) 2010-04-01

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US12/497,770 Abandoned US20100078356A1 (en) 2008-10-01 2009-07-06 Process for the distillation of decanted oils for the production of petroleum pitches

Country Status (6)

Country Link
US (1) US20100078356A1 (zh)
JP (1) JP2012504673A (zh)
CN (1) CN102099440A (zh)
AR (1) AR071415A1 (zh)
BR (1) BRPI0804234A2 (zh)
WO (1) WO2010038026A2 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170174999A1 (en) * 2015-12-18 2017-06-22 National Chung Shan Institute Of Science And Technology Method of manufacturing refined pitch

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9243187B2 (en) 2011-05-27 2016-01-26 Petroleo Brasileiro S.A.—Petrobras Process for the production of pitch
CN107245346B (zh) * 2017-06-20 2022-12-13 中冶焦耐(大连)工程技术有限公司 一种改质沥青生产工艺
CN109504417A (zh) * 2017-09-14 2019-03-22 大连正邦新能源材料有限公司 一种中间相可纺沥青的生产方法及系统

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2752290A (en) * 1953-11-27 1956-06-26 Cabot Godfrey L Inc Production of pitch from petroleum residues
US4705618A (en) * 1984-10-29 1987-11-10 Maruzen Petrochemical Co., Ltd. Process for the preparation of an intermediate pitch for manufacturing carbon products
US4721578A (en) * 1986-10-06 1988-01-26 E. I. Du Pont De Nemours And Company Perfluorinated polypropylene oxide compounds for vapor phase heat transfer processes
US4820401A (en) * 1986-05-19 1989-04-11 Kozo Iizuka Process for the preparation of mesophase pitches
US4931162A (en) * 1987-10-09 1990-06-05 Conoco Inc. Process for producing clean distillate pitch and/or mesophase pitch for use in the production of carbon filters
US5032250A (en) * 1988-12-22 1991-07-16 Conoco Inc. Process for isolating mesophase pitch
US5259947A (en) * 1990-12-21 1993-11-09 Conoco Inc. Solvated mesophase pitches

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2763602A (en) * 1953-02-06 1956-09-18 Cabot Godfrey L Inc Process for the production of pitch from petroleum residues
US4645584A (en) * 1981-09-24 1987-02-24 Amoco Corporation Mesophase pitch feedstock from hydrotreated decant oils
US4427530A (en) * 1982-02-08 1984-01-24 Exxon Research And Engineering Co. Aromatic pitch derived from a middle fraction of a cat cracker bottom

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2752290A (en) * 1953-11-27 1956-06-26 Cabot Godfrey L Inc Production of pitch from petroleum residues
US4705618A (en) * 1984-10-29 1987-11-10 Maruzen Petrochemical Co., Ltd. Process for the preparation of an intermediate pitch for manufacturing carbon products
US4820401A (en) * 1986-05-19 1989-04-11 Kozo Iizuka Process for the preparation of mesophase pitches
US4721578A (en) * 1986-10-06 1988-01-26 E. I. Du Pont De Nemours And Company Perfluorinated polypropylene oxide compounds for vapor phase heat transfer processes
US4931162A (en) * 1987-10-09 1990-06-05 Conoco Inc. Process for producing clean distillate pitch and/or mesophase pitch for use in the production of carbon filters
US5032250A (en) * 1988-12-22 1991-07-16 Conoco Inc. Process for isolating mesophase pitch
US5259947A (en) * 1990-12-21 1993-11-09 Conoco Inc. Solvated mesophase pitches

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170174999A1 (en) * 2015-12-18 2017-06-22 National Chung Shan Institute Of Science And Technology Method of manufacturing refined pitch

Also Published As

Publication number Publication date
AR071415A1 (es) 2010-06-16
WO2010038026A2 (en) 2010-04-08
WO2010038026A3 (en) 2010-11-04
BRPI0804234A2 (pt) 2011-05-17
CN102099440A (zh) 2011-06-15
JP2012504673A (ja) 2012-02-23

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AS Assignment

Owner name: PETROLEO BRASILEIRO S.A. - PETROBRAS,BRAZIL

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:DE CASTRO, LUIZ DEPINE;DUTRA, CARLOS HENRIQUE MONTEIRO DE CASTRO;DE FREITAS, LUIZ CLOVIS;REEL/FRAME:022913/0728

Effective date: 20090427

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION