CN103374378B - A kind of method of hydrotreating producing high-grade low-freezing point diesel oil - Google Patents
A kind of method of hydrotreating producing high-grade low-freezing point diesel oil Download PDFInfo
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- Y02P30/20—Technologies relating to oil refining and petrochemical industry using bio-feedstock
Abstract
The present invention relates to a kind of method of hydrotreating producing high-grade low-freezing point diesel oil.First under the condition of hydrogenation, bio-oil mixes with recycle hydrogen by hydrotreatment reaction zone, hydrotreatment resultant flow point uses from the gas circulation obtained, being separated the liquid obtained mixes by hydrofining reaction district with diesel raw material oil and recycle hydrogen, then the hydro-upgrading reaction zone at least comprising hydroisomerizing performance catalyzer is entered, hydro-upgrading resultant flow point continues fractionation from the liquid obtained and obtains petroleum naphtha and low freezing point diesel fuel product, under response behaviour, the hydrogenation active component of the hydrogenation catalyst that hydrotreatment reaction zone uses is the W of sulphided state, Mo, one or more in Ni and Co.Compared with prior art, the inventive method not only effectively can improve bio-oil as storage stability during oil fuel, can also direct production high-grade low-freezing point clean diesel.
Description
Technical field
The invention belongs to the working method of renewable energy source, relate to a kind of method of hydrotreating, particularly a kind of with bio-oil and diesel oil distillate for stock oil, the method for hydrotreating of direct production high-grade low-freezing point diesel oil.
Background technology
The energy in current global range is mainly derived from fossil energy, mainly comprise coal and oil, and motor for automobile fuel is mainly derived from oil.Fossil energy belongs to Nonrenewable energy resources, and resource is day by day exhausted, and oil more has the trend of heaviness and the aggravation of in poor quality degree.Along with sustained economic development, the environmental regulation increasingly stringent in the world, emission standard is more and more higher, various countries are very vigorous to the demand of light clean fuel, these all require that new oil substitutes is constantly found while improving existing oil Refining Technologies by oil company and R&D institution, and produce satisfactory product with minimum cost, especially can to the development and utilization of renewable resource.
Bio oil, fat are renewable resourcess, and therefore its comprehensive utilization also obtains worldwide extensive attention, and be devoted to take it as the research of raw material production cleaning product with all strength.Proven technique by the first-generation biofuel utilizing the method for transesterify to carry out production biofuel (being generally fatty acid methyl ester).But because in this kind of biofuel, oxygen level is high, although many countries and regions have put into effect the standard of biofuel successively, all oil engines can not be applicable to.If bio oil, fat are produced automotive fuel by the method for deep hydrogenation, all remove by oxygen or most of product removing production and meet automotive fuel standard, this method directly can meet the requirement of existing market.
Existing bio oil, fat hydrogenation method produces the processing technology of automotive fuel, US20060186020, EP1693432, CN101321847A, CN200710012090.6, CN200680045053.9, CN200710065393.4, CN200780035038.0, CN200710012208.5, CN200780028314.0 and CN101029245A etc. disclose vegetables oil hydroconversion process, adopt coker naphtha, diesel oil distillate (straight-run diesel oil, LCO and coker gas oil), petroleum hydrocarbon cut and the bio oil such as wax oil cut or residue oil fraction, fat is directly mixed into hydroconversion reaction zone, beds is passed through under the effect of hydrogen, produce the raw material etc. of diesel product or preparing ethylene by steam cracking.US5705722 discloses the diesel oil blending component producing diesel oil distillate scope containing the vegetables oil such as unsaturated fatty acids, fat and animal oil mixing back end hydrogenation.
EP1741767 and EP1741768 discloses a kind of method of producing diesel oil distillate with animal-plant oil, be mainly animal-plant oil first through hydrotreatment, then by isomerization catalyst bed layer, obtain low freezing point diesel fuel component, but owing to generating water in hydroprocessing processes, cause very adverse influence to isomerization catalyst, device can not long-period stable operation.
Comprise in the bio-oil hydrogenation process of aforesaid method, one of subject matter run into is that bed carbon distribution causes pressure drop rise that running period is shortened, and needs more catalyst changeout of often stopping work.Particularly independent with bio oil, fat for raw material or bio-oil blending ratio higher time, the running period of hydrogenation catalyst is more subject to obvious impact.Carry out conventional raw material weighted BMO spaces (as the hydrotreated lube base oil of routine or either shallow hydrofining etc.) according to this area general knowledge, although extend (generally can reach 500 hours) running period to some extent, but still long period steady running problem can not be solved.Containing multiple different organo-functional group in bio-oil, the reaction of these organo-functional groups in hydrogenation process is comparatively complicated, influence each other between different reactions, the major cause affecting bio-oil raw material hydrogenation process stability is still indefinite, and therefore improving run stability is the major issue that this area needs to solve.Simultaneously when producing low freezing point diesel fuel cut also because catalyst activity is affected the shortcomings such as the running period that causes is short.
In prior art, bio-oil hydrogenation produces the method for automotive fuel, the petroleum fractions hybrid process of general needs and larger proportion, otherwise can not running period be ensured, or directly by hydrofining-catalyst for hydro-upgrading bed, the component poor stability of cracking catalyst activity, can not long-term operation.The present invention is by optimizing the grating technology and operational condition that use catalyzer, first reaction zone hydrofining (hydrogenation catalyst of grating and suitable temperature of reaction), second reaction zone diesel oil hydrofining, 3rd reaction zone hydro-upgrading pour point depression, can directly with bio-oil and diesel oil for raw material production high-grade low-freezing point diesel product, solving bio-oil hydrogenation unit can not the problem of long period steady running, significantly can reduce the condensation point of diesel oil distillate simultaneously.And the weighted BMO spaces of routine does not still reach required stability, conventional weighted BMO spaces generally can realize the running period of 500 hours, the use properties of catalyzer obviously declines, and uses reacting system pressure during fixed bed to fall obvious rising, needs more catalyst changeout.And the present invention program, in steady running after 1000 hours, the Pressure Drop of catalyst performance and reactive system does not all have considerable change, and according to this trend, estimating completely can steady running 1 ~ 3 year.
Summary of the invention
For the deficiencies in the prior art, the invention provides a kind of method of hydrotreating producing high-grade low-freezing point diesel oil, with bio-oil and diesel oil distillate for stock oil, the diesel product of direct production super low sulfur, low condensation point under the condition of hydrogenation, there is hydrogenation process stablize, the features such as running period is long.
A kind of method of hydrotreating producing high-grade low-freezing point diesel oil of the present invention, is characterized in that comprising following content:
A one or more in () bio-oil are the first stock oil, one or more of straight-run diesel oil or secondary processing diesel oil cut are the second stock oil;
B () is under hydroprocessing operations condition, the first stock oil is by the first paragraph reaction zone of at least two hydrogenators, hydrogenation catalyst is loaded in hydrogenator, bio-oil and hydrogen are first by the hydrogenator of cold operation, then by the hydrogenator of high-temperature operation, under response behaviour, the active ingredient of hydrogenation catalyst is one or more in W, Mo, Ni and Co of sulphided state, first reaction zone hydrogenation effluent is separated into gas phase and liquid phase, and gas-phase dehydration process Posterior circle uses;
C () is under hydrofining operational condition, step (b) is separated and obtains the second reaction zone that liquid and the second stock oil pass through to load Hydrobon catalyst under hydroconversion condition, under hydroisomerizing condition, then continue to enter the 3rd reaction zone at least comprising hydroisomerization catalyst;
(d) the 3rd the gas phase of reaction zone reaction effluent recycle, the liquid phase of the 3rd reaction zone reaction effluent is carried out fractionation by distillation and is obtained petroleum naphtha and high-quality super low sulfur, low freezing point diesel fuel product cut;
E () supplements S-contained substance in the first reaction zone, to maintain hydrogen sulfide content in circulation gas.
In the inventive method step (a), the bio oil used, fat can comprise vegetables oil or animal grease, vegetables oil comprises one or more in soybean oil, peanut oil, Viscotrol C, rapeseed oil, Semen Maydis oil, sweet oil, plam oil, Oleum Cocois, tung oil, oleum lini, sesame oil, Oleum Gossypii semen, curcas oil, sunflower seed oil and rice bran wet goods, one or more during animal grease comprises butter, lard, sheep oil, fish oil and roasts grease that other animals obtain etc.
In the inventive method step (a), straight-run diesel oil is generally the diesel oil distillate that Atmospheric vacuum fractionation obtains, the straight-run diesel oil of preferred intermediate base crude oil and naphthenic base crude.Secondary processing diesel oil is generally secondary petroleum refining process, as the diesel oil distillate that the technological processs such as hydrocracking, catalytic cracking, hydrotreatment, coking, thermally splitting, viscosity breaking, ethene obtain, and coal tar diesel oil distillate.
In the inventive method step (a), the volume ratio of the first stock oil and the second stock oil is 1:99 ~ 99:1, preferred 5:95 ~ 95:5, best 10:90 ~ 90:10.
The Hydroprocessing conditions of the hydrogenator of cold operation is generally reaction pressure 3.0MPa ~ 20.0MPa, and be preferably 4.0MPa ~ 18.0MPa, hydrogen to oil volume ratio is 200:1 ~ 3000:1, and volume space velocity is 0.5h
-1~ 6.0h
-1, average reaction temperature 120 DEG C ~ 280 DEG C; The operational condition of the hydrogenator of high-temperature operation is reaction pressure 3.0MPa ~ 20.0MPa, is preferably 4.0MPa ~ 18.0MPa, hydrogen to oil volume ratio 200:1 ~ 3000:1, volume space velocity 0.5h
-1~ 6.0h
-1, average reaction temperature is higher than the hydrogenator of cold operation 50 DEG C ~ 300 DEG C, preferably high 80 ~ 220 DEG C.Process furnace or interchanger are set between the hydrogenator of cold operation and the hydrogenator of high-temperature operation, to adjust the temperature of reaction of the hydrogenator of high-temperature operation.
Bio-oil first by the hydrogenator of cold operation, hydrogenation active component with the weight content of oxide basis for 3% ~ 10%.Multiple catalysts grating can be used in the hydrogenator of cold operation to use.In the hydrogenator of high-temperature operation, the active component content of catalyzer is in element quality, higher than the catalyzer in cold operation hydrogenator 3 ~ 25 percentage points.The carrier of hydrogenation catalyst is generally aluminum oxide, amorphous silicon aluminium, silicon oxide, titanium oxide etc., can contain other auxiliary agent, as P, Si, B, Ti, Zr etc. simultaneously.Can commercial catalyst be adopted, also can by the existing method preparation in this area.The business hydrogenation catalyst that first reaction zone uses mainly contains, as Fushun Petrochemical Research Institute (FRIPP) develop 3926, 3936, CH-20, FF-14, FF-18, FF-24, FF-26, FF-36, FH-98, FH-UDS, the hydrogenation catalysts such as FZC-41, the HR-416 of Inst Francais Du Petrole, the hydrogenation catalysts such as HR-448, the ICR174 of CLG company, ICR178, the hydrogenation catalysts such as ICR179, Uop Inc. is newly developed HC-P, HC-K UF-210/220, the TK-525 of Topsor company, TK-555, the hydrogenation catalysts such as TK-557, the KF-752 of AKZO company, KF-840, KF-848, KF-901, the hydrogenation catalysts such as KF-907.
In the inventive method step (c), the Hydroprocessing conditions of second reaction zone is generally reaction pressure 2.0MPa ~ 20.0MPa, can be identical with the first reaction zone, also can not be identical, and hydrogen to oil volume ratio is 200:1 ~ 3000:1, and volume space velocity is 0.3h
-1~ 6.0h
-1, average reaction temperature 180 DEG C ~ 465 DEG C; Preferred operational condition is hydrogen to oil volume ratio 300:1 ~ 2500:1, volume space velocity 0.4h
-1~ 4.0h
-1, average reaction temperature 200 DEG C ~ 445 DEG C.
In the inventive method step (c), the Hydrobon catalyst that second catalyzer of answering district to use is routine, business hydrogenation catalyst mainly contains, as the FH-5 that Fushun Petrochemical Research Institute (FRIPP) develops, FH-5A, FH-98, FH-DS, FH-UDS series waits hydrogenation catalyst, the HR-416 of Inst Francais Du Petrole, HR-448, HR-548, the hydrogenation catalysts such as HR-568, the ICR174 of CLG company, ICR178, ICR179, the hydrogenation catalysts such as ICR417, the HC-P of Uop Inc.'s exploitation, HC-K, the catalyzer such as UF-210, the TK-525 of Topsor company, TK-559, TK-574, TK-576, TK-607, TK-907, the hydrogenation catalysts such as TK-911, the KF-756 of AKZO company, KF-757, KF-840, the hydrogenation catalysts such as KF-848, the DN2531 of Criterion company, the hydrogenation catalysts such as DN3330 and DN2318.
In the inventive method step (c), the Hydroprocessing conditions of the 3rd reaction zone is generally reaction pressure 2.0MPa ~ 20.0MPa, comparatively the low 0MPa ~ 2.0MPa of second reaction zone reaction pressure, and hydrogen to oil volume ratio is 200:1 ~ 3000:1, and volume space velocity is 0.3h
-1~ 6.0h
-1, average reaction temperature 180 DEG C ~ 465 DEG C; Preferred operational condition is hydrogen to oil volume ratio 300:1 ~ 2500:1, volume space velocity 0.4h
-1~ 4.0h
-1, average reaction temperature 200 DEG C ~ 445 DEG C.
In the inventive method step (c), the hydroisomerization catalyst of the 3rd reaction zone has isomery function (or being called catalyst for hydro-upgrading), containing beta-molecular sieve, the components such as SAPO-11 molecular sieve, SAPO-41, NU-10 molecular sieve or ZSM-22 molecular sieve, described molecular sieve weight content is in the catalyst generally 3% ~ 30%, is preferably 5% ~ 20%.The hydrogenation active metals component of catalyst for hydro-upgrading (in W, Mo, Ni and Co one or more) is generally 10% ~ 40% with the weight content of oxide basis.The commercial catalysts that second segment reaction zone uses mainly contains, as FC-14, FC-16, FC-20 etc. that Fushun Petrochemical Research Institute (FRIPP) develops.
In the inventive method step (e), the sulfur-containing medium supplemented in the first reaction zone material (optimum is dosed in stock oil) can be the compound of sulfur-bearing, as DMDS, CS
2deng.If with second reaction zone, the 3rd reaction zone common recycle hydrogen, then do not need to mend sulphur in addition, but need to ensure that the hydrogen sulfide content in circulation gas is not less than 0.005v%, preferred 0.01v% ~ 2.0v%.Three reaction zones can use independent recycle hydrogen system, also can common recycle hydrogen system.
In the inventive method, Hydrobon catalyst can be supplemented in right amount, by material hydrogenation such as issuable a small amount of alkene in hydro-upgrading process finally arranging of the 3rd reaction zone catalyst for hydro-upgrading bed.In the inventive method, the catalyzer of each reaction zone carries out conventional sulfidizing before use.
Accompanying drawing explanation
Fig. 1 is the method for hydrotreating principle flow chart that the present invention produces high-grade low-freezing point diesel oil.
Fig. 2 is another principle flow chart of method of hydrotreating that the present invention produces high-grade low-freezing point diesel oil.Be that the first reaction zone uses the recycle hydrogen of second, third reaction zone as new hydrogen with the difference of Fig. 1, and the injection of corresponding cancellation vulcanizing agent.
Embodiment
Method of the present invention is specific as follows: with the mixing oil of one or more in bio-oil for stock oil, under Hydroprocessing conditions, stock oil and hydrogen are by comprising the first reaction zone of at least two kinds of hydrogenation catalysts, the hydrotreatment obtained generates logistics and is separated the gas circulation use obtained in high-pressure separator, also system can be gone out, the liquid distillate obtained; The liquid distillate of the first reaction zone, diesel raw material and hydrogen are mixed into and comprise hydrorefined second reaction zone, the hydrofining obtained generates logistics and continues through the 3rd reaction zone comprising and have isomery performance catalyst for hydro-upgrading, the hydro-upgrading obtained generates logistics in high-pressure separator, is separated the gas circulation use obtained, also can go out system, liquid fractionation obtains following products: one or more in gas, petroleum naphtha, low freezing point diesel fuel.The bio-oil that embodiment uses is commercially available prod, uses front filtering solid impurity.
Particular case of the present invention is further illustrated below by embodiment.Modifying catalyst wherein and hydroisomerization catalyst.
The main composition of table 1 hydrogenation catalyst and character.
| Catalyzer | Catalyzer 1 | Catalyzer 2 | Catalyzer 3 | Catalyst for refining | Modifying catalyst |
| Catalyzer forms | |||||
| MoO 3，wt% | 7.8 | 4.0 | 21.0 | 19.0 | 20.3 |
| NiO，wt% | 2.5 | 4.3 | 3.5 | 3.8 | |
| CoO，wt% | 1.5 | 1.5 | |||
| Beta-molecular sieve, wt% | 8.4 | ||||
| Alumina supporter, wt% | Surplus | Surplus | Surplus | Surplus | Surplus |
| The main character of catalyzer | |||||
| Specific surface, m 2/g | >160 | >160 | >160 | >160 | >160 |
| Pore volume, ml/g | >0.30 | >0.30 | 0.33 | 0.34 | >0.34 |
The main character of table 2 diesel raw material oil.
| Catalyzer | Catalytic diesel oil | Medium diesel oil |
| Density, g/cm 3 | 0.934 | 0.878 |
| Cut scope, DEG C | 165~375 | 150~350 |
| Sulphur content, wt% | 1.5 | 1.0 |
| Nitrogen content, μ g/g | 680 | 400 |
| Condensation point, DEG C | 0 | 8 |
| Cetane value | 22 | 38 |
Table 3 embodiment processing condition and test-results.
| First reaction zone processing condition | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 |
| Stock oil | Oleum Gossypii semen | Soybean oil | Rapeseed oil | Plam oil |
| Cold operation reactor | ||||
| Catalyzer | Catalyzer 1 | Catalyzer 1 | Catalyzer 2 | Catalyzer 2/ catalyzer 1 |
| Catalyst volume ratio | 100 | 100 | 100 | 35:65 |
| Reaction pressure, MPa | 17.0 | 12.0 | 6.0 | 10.0 |
| Entrance hydrogen to oil volume ratio | 1500:1 | 500:1 | 2000:1 | 1000:1 |
| Volume space velocity, h -1 | 2.0 | 1.5 | 0.5 | 1.0 |
| Average reaction temperature, DEG C | 150 | 230 | 200 | 260 |
| High-temperature operation reactor | ||||
| Catalyzer | Catalyzer 3 | Catalyzer 3 | Catalyzer 3 | Catalyzer 3 |
| Reaction pressure, MPa | 17.0 | 12.0 | 6.0 | 10.0 |
| Entrance hydrogen to oil volume ratio | 1500:1 | 500:1 | 2000:1 | 1000:1 |
| Volume space velocity, h -1 | 2.5 | 1.5 | 4.0 | 1.0 |
| Average reaction temperature, DEG C | 360 | 335 | 385 | 330 |
| Sulfur-containing medium | CS 2 | DMDS | CS 2 | |
| Hydrogen sulfide content in circulation gas, μ L/L | 1000 | |||
| Second reaction zone processing condition | ||||
| Stock oil | First reaction zone and catalytic diesel oil volume ratio 50:50 | First reaction zone and catalytic diesel oil volume ratio 30:70 | First reaction zone and Medium diesel oil volume ratio 70:30 | First reaction zone and Medium diesel oil volume ratio 20:80 |
| Catalyzer | Catalyst for refining | Catalyst for refining | Catalyst for refining | Catalyst for refining |
| Reaction pressure, MPa | 10.0 | 12.0 | 8.0 | 6.0 |
| Entrance hydrogen to oil volume ratio | 1000:1 | 1500:1 | 400:1 | 600:1 |
| Volume space velocity, h -1 | 2.0 | 1.0 | 2.5 | 3.5 |
| Average reaction temperature, DEG C | 350 | 340 | 355 | 360 |
| 3rd reaction zone processing condition | ||||
| Catalyzer | Modifying catalyst | Modifying catalyst | Modifying catalyst | Modifying catalyst |
| Reaction pressure, MPa | 13.0 | 12.0 | 8.0 | 12.0 |
| Entrance hydrogen to oil volume ratio | 1500:1 | 900:1 | 600:1 | 1100:1 |
| Volume space velocity, h -1 | 2.0 | 1.0 | 4.5 | 2.0 |
| Average reaction temperature, DEG C | 360 | 350 | 365 | 330 |
| Diesel product | ||||
| Density, g/cm 3 | 0.840 | 0.845 | 0.815 | 0.822 |
| Sulphur content, μ g/g | <5 | <5 | <5 | <5 |
| Condensation point, DEG C | -30 | -35 | -20 | -50 |
| Cetane value | 53 | 51 | 68 | 60 |
Table 4 embodiment processing condition and test-results.
| First reaction zone processing condition | Embodiment 5 | Comparative example 1 | Comparative example 2 | Comparative example 3 |
| Cold operation reactor | ||||
| Catalyzer | Catalyzer 2 | Catalyzer 2/ catalyst for refining/modifying catalyst | Catalyzer 2/ catalyst for refining/modifying catalyst | Catalyzer 2/ catalyst for refining/modifying catalyst |
| Catalyst volume ratio | 100 | 50:30:20 | 50:30:20 | 50:30:20 |
| Stock oil volume ratio | Rapeseed oil | Rapeseed oil/catalytic diesel oil | Rapeseed oil/catalytic diesel oil | Rapeseed oil/catalytic diesel oil |
| Stock oil ratio | 100 | 50:50 | 50:50 | 50:50 |
| Reaction pressure, MPa | 10.0 | 10.0 | 10.0 | 10.0 |
| Entrance hydrogen to oil volume ratio | 1000:1 | 1000:1 | 1000:1 | 1000:1 |
| Volume space velocity, h -1 | 1.6 | 0.61 | 0.61 | 0.61 |
| Average reaction temperature, DEG C | 245 | 350 | 365 | 385 |
| High-temperature operation reactor | — | — | — | |
| Catalyzer | Catalyzer 3 | |||
| Reaction pressure, MPa | 10.0 | |||
| Entrance hydrogen to oil volume ratio | 1000:1 | |||
| Volume space velocity, h -1 | 1.6 | |||
| Average reaction temperature, DEG C | 330 | |||
| Sulfur-containing medium | CS 2 | |||
| Second reaction zone processing condition | Embodiment 5 | — | — | — |
| Stock oil | First reaction zone and catalytic diesel oil volume ratio 50:50 | |||
| Catalyzer | Catalyst for refining | |||
| Stock oil | Catalytic diesel oil | |||
| Reaction pressure, MPa | 9.0 | |||
| Entrance hydrogen to oil volume ratio | 800:1 | |||
| Volume space velocity, h -1 | 1.5 | |||
| Average reaction temperature, DEG C | 340 | |||
| 3rd reaction zone processing condition | — | — | — | |
| Catalyzer | Modifying catalyst | |||
| Reaction pressure, MPa | 9.0 | |||
| Entrance hydrogen to oil volume ratio | 1000:1 | |||
| Volume space velocity, h -1 | 3.0 | |||
| Average reaction temperature, DEG C | 360 | |||
| Runtime, h | 1000 | 100 | 300 | 500 |
| Total pressure drop, MPa | 0.06 | 0.06 | 0.15 | 0.28 |
| Diesel product | ||||
| Density, g/cm 3 | 0.843 | 0.844 | 0.869 | 0.895 |
| Sulphur content, μ g/g | <5 | <5 | 50 | 450 |
| Condensation point, DEG C | -20 | -20 | -10 | 5 |
| Cetane value | 62 | 62 | 55 | 47 |
As can be seen from embodiment, bio-oil and diesel raw material oil can produce high-grade low-freezing point diesel product by the method for hydrotreating of this technology, or high-grade low-freezing point diesel oil blending component, and can long-period stable operation be realized, operate after 1000 hours, reactive system pressure drop is not risen substantially, and on catalyzer, carbon deposition quantity only has about 3.8wt%, belong to balance carbon deposition quantity, do not affect catalyzer use properties.
Claims (12)
1. produce a method of hydrotreating for high-grade low-freezing point diesel oil, it is characterized in that comprising following content:
A one or more in () bio-oil are the first stock oil, one or more of straight-run diesel oil or secondary processing diesel oil cut are the second stock oil;
B () is under hydroprocessing operations condition, the first stock oil is by the first reaction zone of at least two hydrogenators, hydrogenation catalyst is loaded in hydrogenator, bio-oil and hydrogen are first by the hydrogenator of cold operation, then by the hydrogenator of high-temperature operation, under response behaviour, the active ingredient of hydrogenation catalyst is the W of sulphided state, Mo, one or more in Ni and Co, first reaction zone hydrogenation effluent is separated into gas phase and liquid phase, gas-phase dehydration process Posterior circle uses, wherein, in the hydrogenator of the cold operation that first reaction mass passes through, hydrogenation active component with the weight content of oxide basis for 3% ~ 10%, in the hydrogenator of high-temperature operation, the active component content of catalyzer is in element quality, higher than the catalyzer in cold operation hydrogenator 3 ~ 25 percentage points,
C () is under hydrofining operational condition, step (b) is separated and obtains the second reaction zone that liquid and the second stock oil pass through to load Hydrobon catalyst under hydroconversion condition, under hydroisomerizing condition, then continue to enter the 3rd reaction zone at least comprising hydroisomerization catalyst;
(d) the 3rd the gas phase of reaction zone reaction effluent recycle, the liquid phase of the 3rd reaction zone reaction effluent is carried out fractionation by distillation and is obtained petroleum naphtha and high-quality super low sulfur, low freezing point diesel fuel product cut;
E () supplements S-contained substance in the first reaction zone, to maintain hydrogen sulfide content in circulation gas;
In step (b), the average reaction temperature of the hydrogenator of cold operation 120 DEG C ~ 280 DEG C, the average reaction temperature of the hydrogenator of high-temperature operation is higher than the hydrogenator of cold operation 50 DEG C ~ 300 DEG C.
2. in accordance with the method for claim 1, it is characterized in that: in step (a), the bio-oil of use comprises vegetables oil or animal grease.
3. in accordance with the method for claim 1, it is characterized in that: in step (a), the straight-run diesel oil used comprises the diesel oil distillate that atmospheric and vacuum distillation of petroleum obtains, secondary processing diesel oil is generally the diesel oil distillate that the hydrocracking of secondary petroleum refining process, catalytic cracking, hydrotreatment, coking, thermally splitting, viscosity breaking or ethylene process process obtain, or coal tar diesel oil distillate.
4. in accordance with the method for claim 1, it is characterized in that: in step (b), the reaction pressure 3.0MPa ~ 20.0MPa of the hydrogenator of cold operation, hydrogen to oil volume ratio is 200:1 ~ 3000:1, and volume space velocity is 0.5h
-1~ 6.0h
-1; The operational condition of the hydrogenator of high-temperature operation is reaction pressure 3.0MPa ~ 20.0MPa, hydrogen to oil volume ratio 200:1 ~ 3000:1, volume space velocity 0.5h
-1~ 6.0h
-1.
5. in accordance with the method for claim 1, it is characterized in that: in step (b), the average reaction temperature of the hydrogenator of high-temperature operation is higher than the hydrogenator of cold operation 80 ~ 220 DEG C.
6. in accordance with the method for claim 1, it is characterized in that: in step (c), the reaction pressure of second reaction zone is 3.0MPa ~ 20.0MPa, and hydrogen to oil volume ratio is 200:1 ~ 3000:1, and volume space velocity is 0.3h
-1~ 6.0h
-1, average reaction temperature is 180 DEG C ~ 465 DEG C.
7. in accordance with the method for claim 6, it is characterized in that: in step (c), the reaction conditions of second reaction zone is: hydrogen to oil volume ratio is 300:1 ~ 2500:1, and volume space velocity is 0.4h
-1~ 5.0h
-1, average reaction temperature is 200 DEG C ~ 445 DEG C.
8. in accordance with the method for claim 1, it is characterized in that: in step (c), the reaction pressure of the 3rd reaction zone is 3.0MPa ~ 20.0MPa, compared with the low 0MPa ~ 2.0MPa of the reaction pressure of second reaction zone, hydrogen to oil volume ratio is 200:1 ~ 3000:1, and volume space velocity is 0.3h
-1~ 6.0h
-1, average reaction temperature is 180 DEG C ~ 465 DEG C.
9. in accordance with the method for claim 8, it is characterized in that: in step (c), the reaction conditions of the 3rd reaction zone is: hydrogen to oil volume ratio is 300:1 ~ 2500:1, and volume space velocity is 0.4h
-1~ 4.0h
-1, average reaction temperature is 200 DEG C ~ 445 DEG C.
10. in accordance with the method for claim 1, it is characterized in that: in step (c), the hydroisomerization catalyst of the 3rd reaction zone contains beta-molecular sieve, SAPO-11 molecular sieve, SAPO-41, NU-10 molecular sieve or ZSM-22 molecular sieve, the hydrogenation active metals component of hydroisomerization catalyst with the weight content of oxide basis for 10% ~ 40%.
11. in accordance with the method for claim 1, it is characterized in that: in step (e), the sulfur-containing medium supplemented in reaction mass is the compound of sulfur-bearing, or the sour gas in the 3rd reaction zone is introduced the first reaction zone mutually, ensures that the hydrogen sulfide content in circulation gas is not less than 0.005v%.
12. in accordance with the method for claim 1, it is characterized in that: it is characterized in that in step (a), and the volume ratio of the first stock oil and the second stock oil is 10:90 ~ 90:10.
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|---|---|---|---|
| CN201210130676.3A CN103374378B (en) | 2012-04-29 | 2012-04-29 | A kind of method of hydrotreating producing high-grade low-freezing point diesel oil |
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| WO2011112660A2 (en) * | 2010-03-09 | 2011-09-15 | Exxonmobil Research And Engineering Company | Dewaxing of renewable diesel fuel |
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| WO2011112660A2 (en) * | 2010-03-09 | 2011-09-15 | Exxonmobil Research And Engineering Company | Dewaxing of renewable diesel fuel |
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