EP0726306B1 - Verfahren zur gemeinsamen Hydrierung von kohlenwasserstoffhaltigen Gasen und Kondensaten - Google Patents
Verfahren zur gemeinsamen Hydrierung von kohlenwasserstoffhaltigen Gasen und Kondensaten Download PDFInfo
- Publication number
- EP0726306B1 EP0726306B1 EP96101496A EP96101496A EP0726306B1 EP 0726306 B1 EP0726306 B1 EP 0726306B1 EP 96101496 A EP96101496 A EP 96101496A EP 96101496 A EP96101496 A EP 96101496A EP 0726306 B1 EP0726306 B1 EP 0726306B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gas
- condensate
- stage
- hydrogenation
- condensates
- 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
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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
- C10G1/00—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal
- C10G1/10—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal from rubber or rubber waste
-
- 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
- C10G1/00—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal
Definitions
- the present invention relates to a new common method Hydrogenation of hydrocarbon gases and condensates.
- DE-A 43 11 034 proposes that by depolymerization gas, condensate and plastic waste the bottom phase containing the viscous depolymerization products in subtract separate streams and the condensate and the bottom phase to be processed separately. This also teaches Document a one-step hydrogenation of the condensate on a fixed bed catalyst.
- the object of the present invention was to provide a method that in a technically simpler way than according to the state technology to substantially reduce polymer formation containing saturated and unsaturated hydrocarbons Gases and condensates. Another aspect of the task was to find a procedure that despite fluctuations constant in the composition of the input streams Operation mode enabled.
- a process for the catalytic hydrogenation of a Gas and a condensate each being substantially saturated and unsaturated and aromatic in the case of condensate Contained hydrocarbons, found with hydrogen, the result is characterized in that at a hydrogen partial pressure from 1 to 50 bar the condensate and part of the gas catalytically hydrogenated in a first stage at 160 to 250 ° C, the Hydrogen product adds the remaining part of the gas and so obtained mixture in a second stage at 250 to 420 ° C catalytically hydrated.
- gases and condensates to be hydrogenated according to the invention are gaseous or liquid under normal pressure.
- the main components of the gases are saturated hydrocarbons such as methane, ethane, propane, n-butane, isobutane and n-pentane.
- saturated hydrocarbons such as methane, ethane, propane, n-butane, isobutane and n-pentane.
- unsaturated hydrocarbons they contain e.g. Ethylene, propylene, 1-butene and 1-pentene.
- gases to be processed can include other components such as Hydrogen, carbon monoxide, carbon dioxide, ammonia, hydrogen sulfide and nitrogen, but also chlorinated carbons such as methyl chloride contain.
- the content of unsaturated hydrocarbons is in the gas at 0.5 to 35 wt .-%, in special cases it can but also higher.
- the gas preferably contains at least 50% by weight saturated hydrocarbons, but can only about 30 wt .-% occur in such gases, the particularly high proportions contain unsaturated hydrocarbons.
- the whole The chlorine content is generally 0.01 to 1% by weight.
- the condensates generally start to boil at approx. 60 ° C and a boiling end at approx. 180 ° C (ASTM D-86). They contain isomeric as saturated hydrocarbons in general Pentanes, hexanes, heptanes, octanes and nonanes, but also longer-chain ones Alkanes. Aromatic hydrocarbons can be used as main components such as benzene, toluene and ethylbenzene continue to occur Xylenes.
- the polymerizable unsaturated compounds are generally essentially styrene, methylstyrene and In the. Condensates with a styrene content of 1 to are preferred 4% by weight.
- the diene number of the condensate is preferably 5 to 50 g / 100 g (UOP method 326-82), the bromine uptake at 20 to 60 g / 100 g (DIN 51 774), particularly preferably 40 to 50 g / 100 g.
- the condensate can also contain chlorine-containing compounds (in usually less than 500 ppm chlorine content, based on the mass) and sulfur compounds (usually less than 100 ppm Sulfur, by mass).
- the gases and condensates mentioned occur in thermal and catalytic Splitting plants of hydrocarbon mixtures.
- Some are coker, coking plants, catalytic crackers or To name Visbreaker, whose product range includes the gases mentioned and includes condensates which, when appropriately worked up can be made available by distillation, for example.
- plastic waste usually as a mixture of polymers such as polyolefins, e.g. Polyethylene and polypropylene, polystyrene, polyvinyl chloride, blends such as ABS, but also used by polyurethanes, polyesters and polyamides become. If necessary, this waste is crushed and melted. The melt, e.g. at 400 to 550 ° C, converted into products, which are then usually distilled be separated. The resulting distillation residues can be returned to the reactor, previously solids and optionally acids are separated.
- polyolefins e.g. Polyethylene and polypropylene, polystyrene, polyvinyl chloride, blends such as ABS, but also used by polyurethanes, polyesters and polyamides become. If necessary, this waste is crushed and melted. The melt, e.g. at 400 to 550 ° C, converted into products, which are then usually distilled be separated. The resulting distillation residues can be returned to the reactor, previously solids and optional
- Hydrogenating starting materials becomes one procedure, accordingly from the depolymerization product in one directly to the reactor downstream first column at 200 to 280 ° C Top product is separated after partial condensation is fed to a second column at 70 to 150 ° C and therein in a gas mixture emerging at the top of the column and one at the bottom of the Column resulting condensate is separated.
- the gas thus obtained and condensate can then be hydrogenated according to the invention.
- the hydrogenation is carried out in two stages.
- the temperature in the first stage is 160 to 250 ° C, that in the second stage 250 to 420 ° C, with the temperatures of the individual stages preferred are different.
- the partial pressure of that used for the hydrogenation Hydrogen is 1 to 50 bar, the pressure range from 5 to 20 bar is preferred.
- the hydrogenation is carried out on catalysts as are known to the person skilled in the art the hydrogenation of hydrocarbon streams containing unsaturated compounds are known per se (e.g. pyrolysis gasoline hydrogenation, Ullmann's Encyclopedia of Industrial Chemistry, 5th edition, VCH, vol. A3, p. 489, and benzene printing refining, Ullmann's Encyclopedia of Technical Chemistry, 4th edition, VCH, Vol. 8, p. 389).
- catalytic converters active metals nickel, cobalt, chromium, molybdenum, tungsten, Palladium and platinum and mixtures thereof, which on supports such as aluminum oxide, silicon dioxide, titanium oxide and Zirconium oxide are applied.
- Co-Mo and Ni-Mo catalysts are particularly preferred commercial catalysts, the cobalt and molybdenum or Contain nickel and molybdenum as active catalysts, so-called Co-Mo and Ni-Mo catalysts, as described for example in DE-A 23 00 038, DE-A 29 03 193 and EP-A 8 424 are.
- the catalysts in both hydrogenation stages are expediently arranged as a fixed bed.
- a vertical hydrogenation reactor is preferred Flow from bottom to top, possibly in the reactor inlet or liquid appearing on the catalyst to drain at the bottom and remove in the bottom of the reactor can.
- the gas to be hydrogenated is applied to both hydrogenation stages divided up. A part is with the condensate to be hydrogenated hydrogenated in the first stage. The hydrogenation product thus obtained the remaining part of the gas is then added before this The mixture obtained is fed to the hydrogenation in the second stage becomes. This ensures that the heat of reaction released both levels are distributed.
- a regulation of the distribution of gas quantities to the first and second stages advantageously takes place in such a way that the temperature of the hydrogenation product leaving the first stage is measured. If this temperature rises, less will occur Gas metered into the first stage and vice versa. By doing this can also be used with fluctuating concentrations Individual components in the mixture to be hydrogenated are relative Ensure constant reaction temperature on the catalyst.
- the amount of gas added to the first stage is determined according to the amount of heat released during the hydrogenation of the gas, which depends on its composition and the reaction temperature in the first reactor. It can easily be carried out by a specialist appropriate preliminary tests can be determined.
- the process according to the invention is preferred in a cycle gas mode operated, i.e. there will be gas in the hydrogenation stages in the circuit driven, only the freshly supplied gas and condensate appropriate amount of hydrogenation product is removed.
- the Product obtained after the second stage can be known per se Way, for example, worked up by distillation. Prefers is a relaxation of the mixture in a column and subsequent fractionation.
- the process products can be used in many ways, for example as raw gas for a steam cracker or as gasoline. It is still possible to obtain the hydrogenation product in an aromatic plant processing of pure aromatics.
- a separator 11 is the hydrogenated condensate and optionally wash water withdrawn via a line 12.
- the gas phase becomes partial discharged via a line 13 in order to level up to avoid unwanted components in the cycle gas.
- the remaining one Part is mixed with hydrogen 4 and over a Compressor 14 returned to the process.
- FIG. 2 shows the described method with an optimized Heat composite.
- a pre-evaporator 15 in front of the evaporator 5 appropriate.
- the pre-evaporation takes place in countercurrent to the reactor outlet stream 6 after preheating the pre-evaporator inlet stream.
- the current fed directly to the evaporator 5 also becomes preheated against the outlet flow of the pre-evaporator 16.
- gases and condensates which essentially contain hydrocarbons, from unsaturated ones Connections free, so that in the further processing the process products no undesirable polymerization products occur.
- the special distribution of the gas flow over both hydrogenation stages ensures a constant temperature at the catalyst, which leads to longer catalyst life. By avoiding it of excessive temperature increases on the catalyst the process is operated adiabatically, i.e. there are no more Costs for corresponding components for heat removal from the reactor. It was also found that the process contains chlorine Hydrocarbons are dehalogenated, as they are primarily in feedstocks from the depolymerization of plastic waste are. The hydrogen chloride formed can easily be in one Laundry are separated from the process product.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Claims (7)
- Verfahren zur katalytischen Hydrierung eines Gases und eines Kondensats, die jeweils im wesentlichen gesättigte und ungesättigte sowie im Falle des Kondensats weiterhin aromatische Kohlenwasserstoffe enthalten, mit Wasserstoff, dadurch gekennzeichnet, daß man bei einem Wasserstoffpartialdruck von 1 bis 50 bar das Kondensat sowie einen Teil des Gases in einer ersten Stufe bei 160 bis 250°C katalytisch hydriert, dem Hydrierprodukt den verbliebenen Teil des Gases zusetzt und das so erhaltene Gemisch in einer zweiten Stufe bei 250 bis 420°C katalytisch hydriert.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß man die erste Stufe in einem senkrecht stehenden Reaktor ausführt, der vom zu hydrierenden Gas und Kondensat von unten nach oben durchströmt wird.
- Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß man in Kreisgasfahrweise arbeitet.
- Verfahren nach den Ansprüchen 1 bis 3, dadurch gekennzeichnet, daß man in der ersten Stufe, der zweiten Stufe oder in beiden Stufen Katalysatoren verwendet, die Cobalt und Molybdän oder Nickel und Molybdän als katalytisch aktive Bestandteile enthalten.
- Verfahren nach den Ansprüchen 1 bis 4, dadurch gekennzeichnet, daß man ein Gas und ein Kondensat verwendet, die bei der thermischen Depolymerisation von Kunststoffabfällen anfallen.
- Verfahren nach den Ansprüchen 1 bis 5, dadurch gekennzeichnet, daß man ein Kondensat mit einer Bromaufnahme von 20 bis 60 g/100 g nach der DIN 51 774 verwendet.
- Verfahren nach den Ansprüchen 1 bis 6, dadurch gekennzeichnet, daß man ein Kondensat mit einem Styrolgehalt von 1 bis 4 Gew.-% verwendet.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19504595A DE19504595A1 (de) | 1995-02-11 | 1995-02-11 | Verfahren zur gemeinsamen Hydrierung von kohlenwasserstoffhaltigen Gasen und Kondensaten |
| DE19504595 | 1995-02-11 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0726306A1 EP0726306A1 (de) | 1996-08-14 |
| EP0726306B1 true EP0726306B1 (de) | 1999-04-28 |
Family
ID=7753734
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP96101496A Expired - Lifetime EP0726306B1 (de) | 1995-02-11 | 1996-02-02 | Verfahren zur gemeinsamen Hydrierung von kohlenwasserstoffhaltigen Gasen und Kondensaten |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0726306B1 (de) |
| DE (2) | DE19504595A1 (de) |
| DK (1) | DK0726306T3 (de) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19721301C1 (de) * | 1997-05-21 | 1998-10-01 | Basf Ag | Verfahren zur Hydrolyse von Alkylmonohalogeniden |
| WO2017122040A1 (en) | 2016-01-12 | 2017-07-20 | Sabic Global Technologies B.V. | A dynamic melt crystallization process for purifying dicyclopentadiene from a mixed liquid hydrocarbon stream |
| US10442997B2 (en) | 2016-06-29 | 2019-10-15 | Sabic Global Technologies B.V. | Plastic pyrolysis |
| CN109477006B (zh) | 2016-07-13 | 2021-09-10 | 沙特基础全球技术有限公司 | 热解油同时脱氯和裂化并同时实现芳烃脱烷基化的方法 |
| CN109642164B (zh) | 2016-09-22 | 2021-06-08 | 沙特基础工业全球技术公司 | 包括热解、加氢裂化、加氢脱烷基化和蒸汽裂解步骤的集成工艺配置 |
| NO345506B1 (en) * | 2018-07-06 | 2021-03-15 | Quantafuel As | Production of hydrocarbon fuels from waste plastic |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2337195A1 (fr) * | 1976-01-05 | 1977-07-29 | Inst Francais Du Petrole | Procede de traitement catalytique, en trois etapes, sous pression d'hydrogene de coupes lourdes tres fortement insaturees |
| DE4311034A1 (de) * | 1993-04-03 | 1994-10-06 | Veba Oel Ag | Verfahren zur Gewinnung von Chemierohstoffen und Kraftstoffkomponenten aus Alt- oder Abfallkunststoff |
| DE4402953A1 (de) * | 1993-04-22 | 1995-08-03 | Veba Oel Ag | Verfahren zur Spaltung von Polymeren |
-
1995
- 1995-02-11 DE DE19504595A patent/DE19504595A1/de not_active Withdrawn
-
1996
- 1996-02-02 DK DK96101496T patent/DK0726306T3/da active
- 1996-02-02 DE DE59601740T patent/DE59601740D1/de not_active Expired - Fee Related
- 1996-02-02 EP EP96101496A patent/EP0726306B1/de not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE19504595A1 (de) | 1996-08-14 |
| EP0726306A1 (de) | 1996-08-14 |
| DK0726306T3 (da) | 1999-10-25 |
| DE59601740D1 (de) | 1999-06-02 |
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