CN103102898B - Hydrocracking method for producing low aromatic hydrocarbon solvent oil from biological oil - Google Patents
Hydrocracking method for producing low aromatic hydrocarbon solvent oil from biological oil Download PDFInfo
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- Y02P30/00—Technologies relating to oil refining and petrochemical industry
- Y02P30/20—Technologies relating to oil refining and petrochemical industry using bio-feedstock
Abstract
The present invention relates to a hydrocracking method for producing a low aromatic hydrocarbon solvent oil from a biological oil. The method is characterized in that a biological oil is adopted as a raw material oil; under a hydrogenation condition, the raw material oil and hydrogen are mixed, and pass through a first stage hydrogenation reaction zone, wherein the reaction zone contains at least two hydrocarbon catalyst bed layers, and hydrocarbon activity component contents of the two hydrocarbon catalyst bed layers are sequentially increased; hydrogen-rich gas separated from a stream generated through first stage hydrogenation is recycled; the separated liquid enters a second stage hydrocracking reaction zone; and sub-hydrogen gas separated from a stream generated through second stage hydrogenation is recycled, and the separated liquid product is subjected to fractionation to obtain various low aromatic hydrocarbon solvent oils, wherein hydrogenation activity components of the hydrogenation catalyst are one or a plurality of materials selected from reduction state W, Mo, Ni and Co under a reaction state. Compared with the method in the prior art, the method of the present invention has the following advantages that: low aromatic hydrocarbon solvent oil production methods are increased, activity stability of the catalyst can be ensured, and stable and long period device operation can be ensured.
Description
Technical field
The present invention relates to a kind of method for hydrogen cracking, particularly one take bio-oil as the method for hydrogen cracking of stock oil, direct production solvent oil.
Background technology
World economy sustainable development, in current global range, the main source of Chemicals is fossil energy, wherein most importantly oil and coal.These two kinds of fossil energies all belong to Nonrenewable energy resources, not only resource is day by day exhausted, and heaviness and in poor quality aggravation, difficulty of processing and tooling cost increase gradually, new oil substitutes is found except carrying out existing oil Refining Technologies improving, produce satisfactory product with minimum cost, especially the development and utilization of renewable resources obtains paying attention to more and more widely.
Bio-oil is as renewable resources, and main composition is carbon, hydrogen and oxygen, very similar to the composition of alkane, alcohol, ether etc., and each research unit and enterprise are all making great efforts to carry out its research as clean energy.The method production biofuel (being generally fatty acid methyl ester) utilizing transesterify has been proven technique, but because fatty acid methyl ester oxygen level is high, although many countries and regions have put into effect the standard of biofuel successively, and are not suitable for all oil engines.Bio-oil produces automotive fuel by the method for hydrogenation, and all remove by oxygen or partly remove the product produced and meet automotive fuel standard, this method directly can meet the requirement of existing market.
Existing animal-plant oil 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), the petroleum hydrocarbon cuts such as wax oil cut and bio-oil are mixed into hydrogenation catalyst bed, produce diesel product or preparing ethylene by steam cracking raw material etc.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 low freezing point diesel fuel cut with animal-plant oil.
Comprise in the bio-oil hydrogenation process of aforesaid method, one of subject matter run into is that bed carbon distribution causes shorten running period, needs more catalyst changeout of often stopping work, and the main purpose product of these technology is automotive fuel.
Solvent oil is important petroleum products, and its added value is higher than fuel product, and particularly the added value of high-grade low aromatic solvent naphtha is higher.The low aromatic solvent naphtha raw materials for production of current top grade are limited (is generally only limitted to gasoline fraction or the kerosene(oil)fraction of paraffinic crude, or reforming raffinate oil etc.), owing to requiring aromaticity content lower (some solvent oil index request aromaticity content is lower than 0.1%), therefore need to adopt complicated processing route, condition is harsh, production cost is high, limits the production of high-grade low aromatic solvent naphtha.
In prior art, bio-oil usually passes through separately or produces the method for automotive fuel with the method for other petroleum products mixing back end hydrogenations.The present invention is by optimizing the grating technology and operational condition that use reduction-state hydrogenation catalyst, and first paragraph hydrotreatment (hydrogenation catalyst of grating), second segment hydrocracking can be directly raw material production low aromatic solvent naphtha with bio-oil.The present invention extends the raw material sources of high added value low aromatic solvent naphtha, and production cost is low, can improve added value of product further.
Summary of the invention
For the deficiencies in the prior art, the invention provides the production method that a kind of bio-oil produces low aromatic solvent naphtha, can be separately stock oil with bio-oil, use take as-reduced metal as the catalyzer of hydrogenation component, direct production low aromatic solvent naphtha under the condition of two-stage method hydrogenation, there is hydrogenation process stablize, the features such as running period is long.
The method for hydrogen cracking that bio-oil of the present invention produces low aromatic solvent naphtha comprises following content:
A one or more in () bio-oil are stock oil;
B () is under Hydroprocessing conditions, stock oil and hydrogen are by first paragraph reaction zone, first paragraph reaction zone comprises the hydrogenation catalyst bed that at least two hydrogenation active component content raise successively, first stock oil and hydrogen pass through the low beds of hydrogenation active component content, then the high beds of hydrogenation active component content is passed through, under response behaviour, hydrogenation active component is one or more in W, Mo, Ni and Co of reduction-state;
C () first paragraph reaction zone hydrogenation effluent is separated into gas phase and liquid phase, gas-phase dehydration process Posterior circle uses, the second segment reaction zone using hydrocracking catalyst is entered after liquid phase mixes with circulation gas, under response behaviour, the active metal component of hydrocracking catalyst is one or more in W, Mo, Ni and Co of reduction-state;
D gas phase that () second segment reaction zone generates logistics recycles, and the liquid phase of second segment reaction zone reaction effluent is carried out fractionation by distillation and obtained low aromatic solvent oil distillate.
In the inventive method step (a), the bio-oil used 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, sunflower seed oil and rice bran wet goods, and animal grease comprises one or more in butter, lard, sheep oil and fish oil etc.
In the inventive method step (b), the Hydroprocessing conditions of first paragraph reaction zone is generally reaction pressure 2.0MPa ~ 20.0MPa, and hydrogen to oil volume ratio is 200:1 ~ 3000:1, and volume space velocity is 0.1h
-1~ 6.0h
-1, average reaction temperature 180 DEG C ~ 465 DEG C; Preferred operational condition is reaction pressure 2.0MPa ~ 18.0MPa, hydrogen to oil volume ratio 300:1 ~ 2500:1, volume space velocity 0.2h
-1~ 4.0h
-1, average reaction temperature 200 DEG C ~ 445 DEG C.
In the inventive method step (b), beds generally can arrange 2 ~ 5, in the beds that first reaction mass passes through, hydrogenation active component with the weight content of oxide basis for 3% ~ 10%, the hydrogenation catalyst that first reaction mass passes through accounts for 10% ~ 80% of all hydrogenation catalyst volumes in first paragraph reaction zone, preferably 20% ~ 70%, best 30% ~ 60%.The hydrogenation active component of the downstream catalyst that reaction mass passes through increases by 3 ~ 25 percentage points in oxide weight than adjacent upstream catalyzer, preferably increases by 5 ~ 20 percentage points.Beds generally can arrange 2 ~ 5.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 segment reaction zone is generally reaction pressure 2.0MPa ~ 20.0MPa, usually (pressure rating that identical finger herein identical identical with first paragraph reaction zone, due to the Pressure Drop of Flow of Goods and Materials, second segment reaction zone reaction pressure can a little less than first paragraph 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 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 hydrocracking catalyst of second segment reaction zone has cracking function, as containing the component such as Y zeolite and/or ZSM-5 molecular sieve.The hydrogenation active metals component of hydrocracking catalyst is generally 5% ~ 40% with the weight content of oxide basis.The weight content of molecular sieve component in hydrocracking catalyst is generally 5% ~ 60%.Other refractory inorganic oxides can be contained in hydrocracking catalyst simultaneously.Second segment reaction zone use commercial catalysts mainly contain, as Fushun Petrochemical Research Institute (FRIPP) develop 3971,3976, FC-12, FC-18, FC-24, FC-26, FC-32, FC-46, FC-50, FDW-1 etc.
In the inventive method step (d), the low aromatic solvent naphtha obtained is mixed solvent oil distillate, can continue fractionation according to the actual requirements and obtain vegetable oil extraction solvent, No. 90 solvent oils, No. 120 solvent oils, No. 200 solvent oils, D30, D40 etc. trade mark low aromatic solvent naphthas.Specifically specifically can determine according to the boiling range of mixed solvent oil.If there is unconverted oil, unconverted oil can go out system, also capable of circulation time reactive system.
In the inventive method step (d), at low conversion rate in 100% time, the unconverted oil fractionated out in separation column can loop back first paragraph reaction zone or second segment reaction zone, and preferred cycle goes back to second segment reaction zone, and the quality looping back the unconverted oil of reactive system is 5% ~ 50% of fresh feed.
The hydrogenation catalyst of business hydrogenation catalyst or preparation is generally oxidation state, uses hydrogen 200 DEG C ~ 500 DEG C temperature before use, is reduced to reduction-state under preferably 220 DEG C ~ 450 DEG C conditions.Whenever forbid in system, inject sulfur-bearing, nitrogenous medium, avoid poisoning of catalyst.
In the inventive method, Hydrobon catalyst can be supplemented in right amount, by material hydrogenation such as issuable a small amount of rare hydrocarbon in hydrocracking process finally arranging of hydrocracking catalyst bed.
Accompanying drawing explanation
Fig. 1 is the method for hydrogen cracking principle flow chart that bio-oil of the present invention produces low aromatic solvent naphtha.
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 paragraph 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 (abbreviation high score), also system can be gone out, the liquid fractionation obtained and hydrogen are mixed into the second Fan Duanying district comprising and have cracking performance hydrocracking catalyst, obtain hydrocracking logistics and be separated the gas circulation use obtained in high-pressure separator (abbreviation high score), also system can be gone out, liquid separation obtains low aromatic solvent oil production, during low conversion rate, unconverted oil is circulated to second segment reaction zone.The bio-oil that embodiment uses is commercially available prod, uses front filtering solid impurity.
Further illustrate particular case of the present invention below by embodiment, before formally reacting, catalyzer uses hydrogen reducing 10 hours at 380 DEG C.
The main composition of table 1 hydrogenation catalyst and character.
| Catalyzer | Catalyzer 1 | Catalyzer 2 | Catalyzer 3 | Catalyzer 4 | Cracking catalyst 1 | Cracking catalyst 2 |
| Catalyzer forms | ||||||
| MoO 3，wt% | 7.0 | 5.0 | 24.5 | 15.7 | 10.0 | 18.0 |
| NiO，wt% | 2.0 | 3.8 | 2.4 | 2.1 | ||
| CoO，wt% | 1.6 | 3.6 | ||||
| ZSM-5 molecular sieve, wt% | 13.6 | |||||
| Y molecular sieve, wt% | 30.0 | |||||
| Alumina supporter, wt% | Surplus | Surplus | Surplus | Surplus | Surplus | Surplus |
| The main character of catalyzer | ||||||
| Specific surface, m 2/g | >160 | >160 | >160 | >160 | >160 | >160 |
| Pore volume, ml/g | >0.30 | >0.30 | 0.33 | 0.32 | >0.34 | >0.34 |
Table 2 embodiment processing condition and test-results.
| First paragraph processing condition | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 |
| Catalyzer | Catalyzer 1/ catalyzer 3 | Catalyzer 2/ catalyzer 3 | Catalyzer 2/ catalyzer 3 | Catalyzer 1/ catalyzer 4/ catalyzer 3 |
| Catalyst volume ratio | 10:90 | 20:80 | 40:60 | 25:35:40 |
| Stock oil | Soybean oil | Rapeseed oil | Cocounut oil | Oleum Gossypii semen |
| Reaction pressure, MPa | 17.0 | 5.0 | 9.0 | 13.0 |
| Entrance hydrogen to oil volume ratio | 2000:1 | 300:1 | 1000:1 | 1000:1 |
| Cumulative volume air speed, h -1 | 2.0 | 1.8 | 0.5 | 0.5 |
| Average reaction temperature, DEG C | 380 | 310 | 330 | 370 |
| Second segment processing condition | ||||
| Stock oil | First paragraph product liquid | First paragraph product liquid | First paragraph product liquid | First paragraph product liquid+15% unconverted oil |
| Catalyzer | Cracking catalyst 1 | Cracking catalyst 1 | Cracking catalyst 2 | Cracking catalyst 2 |
| Reaction pressure, MPa | 17.0 | 5.0 | 10.0 | 10.0 |
| Entrance hydrogen to oil volume ratio | 1500:1 | 500:1 | 800:1 | 1000:1 |
| Volume space velocity, h -1 | 2.0 | 4.5 | 1.5 | 3.0 |
| Average reaction temperature, DEG C | 320 | 350 | 310 | 380 |
| Spirit fraction | ||||
| Yield, quality % | 87 | 82 | 86 | 80 |
| Aromaticity content | Do not detect | Do not detect | Do not detect | Do not detect |
| Sulphur content, μ g/g | Do not detect | Do not detect | Do not detect | Do not detect |
| Boiling range scope, DEG C | 65～174 | 63～155 | 62～75 | 61～120 |
Table 3 embodiment processing condition and test-results.
| First paragraph processing condition | Embodiment 5 | Comparative example 1 | Comparative example 2 | Comparative example 3 |
| Catalyzer | Catalyzer 2/ catalyzer 3 | Catalyzer 3/ cracking catalyst 1 | Catalyzer 3/ cracking catalyst 1 | Catalyzer 3/ cracking catalyst 1 |
| Catalyst volume ratio | 40:60 | |||
| Stock oil | Oleum Gossypii semen | Oleum Gossypii semen | Oleum Gossypii semen | Oleum Gossypii semen |
| 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 |
| Cumulative volume air speed, h -1 | 0.6 | 0.48 | 0.48 | 0.48 |
| Average reaction temperature, DEG C | 330 | 330 | 330 | 330 |
| Second segment processing condition | — | — | — | |
| Catalyzer | Cracking catalyst 1 | |||
| Reaction pressure, MPa | 10.0 | |||
| Entrance hydrogen to oil volume ratio | 1000:1 | |||
| Cumulative volume air speed, h -1 | 2.4 | |||
| Average reaction temperature, DEG C | 330 | |||
| Runtime, h | 1000 | 200 | 300 | 500 |
| Pressure Drop, MPa | 0 | 0.1 | 0.3 | 0.6 |
| Spirit fraction | ||||
| Yield, quality % | 87 | 87 | 64 | 41 |
| Aromaticity content | Do not detect | Do not detect | Do not detect | Do not detect |
| Sulphur content, μ g/g | Do not detect | Do not detect | Do not detect | Do not detect |
| Boiling range scope, DEG C | 65～174 | 65～174 | 65～174 | 65～174 |
Yield with second segment reaction zone feeds for benchmark.Comparative example catalyzer 3 consumption is identical with the total consumption of embodiment 5 catalyzer 2 and catalyzer 3, and comparative example cracking catalyst 1 consumption is identical with embodiment 5 cracking catalyst 1 consumption.
As can be seen from embodiment, bio-oil can the various low aromatic solvent oil production of direct production by the method for hydrotreating of this technology, by selecting different bio-oils, can produce high-quality low aromatic solvent naphtha, and running is stable.
Claims (9)
1. bio-oil produces a method for hydrogen cracking for low aromatic solvent naphtha, it is characterized in that comprising following content:
A one or more in () bio-oil are stock oil;
B () is under Hydroprocessing conditions, stock oil and hydrogen are by first paragraph reaction zone, first paragraph reaction zone comprises the hydrogenation catalyst bed that at least two hydrogenation active component content raise successively, first stock oil and hydrogen pass through the low beds of hydrogenation active component content, then the high beds of hydrogenation active component content is passed through, under response behaviour, hydrogenation active component is the W of reduction-state, Mo, one or more in Ni and Co, in the beds that first reaction mass passes through, hydrogenation active component with the weight content of oxide basis for 3% ~ 10%, the hydrogenation active component of the downstream catalyst that reaction mass passes through increases by 3 ~ 25 percentage points in oxide weight than adjacent upstream catalyzer,
C () first paragraph reaction zone hydrogenation effluent is separated into gas phase and liquid phase, gas-phase dehydration process Posterior circle uses, the second segment reaction zone using hydrocracking catalyst is entered after liquid phase mixes with circulation gas, under response behaviour, the active metal component of hydrocracking catalyst is one or more in W, Mo, Ni and Co of reduction-state;
D gas phase that () second segment reaction zone generates logistics recycles, and the liquid phase of second segment reaction zone reaction effluent is carried out fractionation by distillation and obtained low aromatic solvent oil distillate;
In described step (b), the Hydroprocessing conditions of first paragraph reaction zone is reaction pressure is 2.0MPa ~ 20.0MPa, and hydrogen to oil volume ratio is 200:1 ~ 3000:1, and volume space velocity is 0.1h
-1~ 6.0h
-1, average reaction temperature is 180 DEG C ~ 465 DEG C, in step (c), and the reaction pressure of second segment reaction zone is 2.0MPa ~ 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.
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 (b), the Hydroprocessing conditions of first paragraph reaction zone is reaction pressure is 2.0MPa ~ 18.0MPa, and hydrogen to oil volume ratio is 300:1 ~ 2500:1, and volume space velocity is 0.2h
-1~ 4.0h
-1, average reaction temperature is 200 DEG C ~ 445 DEG C.
4. according to the method described in claim 1 or 3, it is characterized in that: in step (b), first paragraph reaction zone beds arranges 2 ~ 5, and the hydrogenation catalyst that first reaction mass passes through accounts for 10% ~ 80% of all hydrogenation catalyst volumes in first paragraph reaction zone.
5. in accordance with the method for claim 4, it is characterized in that: in step (b) first paragraph reaction zone, the hydrogenation catalyst that first reaction mass passes through accounts for 20% ~ 70% of all hydrogenation catalyst volumes in first paragraph reaction zone.
6. in accordance with the method for claim 4, it is characterized in that: in step (b) first paragraph reaction zone, the hydrogenation active component of the downstream catalyst that reaction mass passes through increases by 5 ~ 20 percentage points in oxide weight than adjacent upstream catalyzer.
7. in accordance with the method for claim 1, it is characterized in that: in step (c), the hydrogen to oil volume ratio of second segment reaction zone 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.
8. in accordance with the method for claim 1, it is characterized in that: in step (c), the hydrocracking catalyst of second segment reaction zone has cracking function, and hydrocracking catalyst contains Y type molecular sieve and/or ZSM-5 molecular sieve component; The hydrogenation active metals component of hydrocracking catalyst is with the weight content of oxide basis for 5% ~ 40%, and the weight content of molecular sieve component in hydrocracking catalyst is 5% ~ 60%.
9. in accordance with the method for claim 1, it is characterized in that: in step (d), unconverted oil is circulated to first paragraph reaction zone, or is circulated to second segment reaction zone, and turning oil accounts for 5% ~ 50% of fresh feed quality.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101029245A (en) * | 2007-04-13 | 2007-09-05 | 清华大学 | Production of biological diesel oil by integrated hydrogenation |
| CN102027098A (en) * | 2008-03-17 | 2011-04-20 | 环球油品公司 | Production of transportation fuel from renewable feedstocks |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101029245A (en) * | 2007-04-13 | 2007-09-05 | 清华大学 | Production of biological diesel oil by integrated hydrogenation |
| CN102027098A (en) * | 2008-03-17 | 2011-04-20 | 环球油品公司 | Production of transportation fuel from renewable feedstocks |
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