CN1073197A - Catalytic reforming method for hydrocarbon oil - Google Patents
Catalytic reforming method for hydrocarbon oil Download PDFInfo
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- CN1073197A CN1073197A CN91111492A CN91111492A CN1073197A CN 1073197 A CN1073197 A CN 1073197A CN 91111492 A CN91111492 A CN 91111492A CN 91111492 A CN91111492 A CN 91111492A CN 1073197 A CN1073197 A CN 1073197A
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Abstract
A kind of catalytic reforming method for hydrocarbon oil uses at the mixed carrier of β zeolite and inorganic oxide and uploads catalyzer with platinum, rhenium (or tin), chlorine, and its operational condition is identical with the industrial reforming method of existing general routine.Its advantage is that the stock oil that different hydrocarbon are formed is all had higher aromatics yield and aromatics conversion rate, and the effect of alkane isomerization also is better than general conventional reforming method.
Description
The present invention relates to a kind of catalystic reforming method of hydrocarbon ils, more precisely, the present invention relates to the hydrocarbon ils reforming method that a kind of use contains the reforming catalyst of β zeolite.
Catalytic reforming is an important process method in refining of petroleum and the petrochemical complex, it can not only produce high-octane gasoline component and important petrochemical materials-benzene, toluene and dimethylbenzene, can also face the use of hydrogen working method faster for the petroleum refining industry development in recent years by by-product hydrogen simultaneously.At present because the saving of the energy and the cry that requires that prevents the pollution of the environment are improved day by day, motor spirit is to the not stop bracket gasoline development of leading, the gasoline component of producing with reforming method shared ratio in motor spirit is increasing, thereby the requirement of reforming method is also being improved.The reforming catalyst of development of new, the performance of improving catalyzer, the technological process of improving reforming method are the problems that the oil refining worker is concerned about very much.
The reaction of catalystic reforming method mainly is to make hydrocarbon molecules under the effect and resurfacing operation condition of reforming catalyst, carries out rearranging between molecular structure.And the carbon atom number in the hydrocarbon molecule is not changed basically.Series reaction such as the dehydrogenation of six membered ring alkane, five-membered ring alkane dehydroisomerization, alkane isomery, dehydrating alkanes cyclisation, alkane hydrocracking in catalystic reforming method, have been comprised.Be the dual-function catalyst that is called as of series such as platiniferous rhenium, platinum tin at industrial reforming catalyst of being used widely at present, this catalyzer is exactly that metal constituent elements such as platinum-rhenium, platinum-Xi are stated from the carrier of gama-alumina or η-aluminum oxide.The metal constituent element provides dehydrogenation, hydrogenating function.Alumina supporter provides acid function.This dual-function catalyst is stronger to the performance of dehydrogenation of six membered ring alkane and five-membered ring alkane dehydroisomerization, but to dehydrogenating low-carbon alkane cyclisation (being commonly referred to as the aromizing of the low-carbon alkanes) poor-performing of six carbon and seven carbon.In order to improve the selection performance of reforming catalyst, carried out in recent years the reforming catalyst that contains zeolite and the research of reforming process thereof to aromatizing low-carbon paraffin.Existing in this respect many patented technologies are open, as the alkaline L zeolitic reforming catalyst that carries platinum and relevant reforming method (as US4,448,841, GB2114150A etc.).This catalyzer that contains the L zeolite is good than dual-function catalyst to the aromizing performance of alkane, but remains in anti-sulphur ability stable imperfect problem.Research Institute of Petro-Chemical Engineering has applied for the patent of invention (publication number CN1035316A and CN1043450A) of the catalysis type material of relevant β zeolite in 1988, subsequently, having proposed application number in nineteen ninety again is 901060232 application for a patent for invention, this application is a carrier with this catalysis type material exactly, be loaded with the reforming catalyst of metal constituent element, it can have further improvement than existing reforming catalyst on indivedual performances.
Purpose of the present invention is exactly the catalystic reforming method that will propose a kind of hydrocarbon ils, and this method is used the above-mentioned catalyzer that contains the β zeolite, to improve the conversion performance of alkane.
The feature of the inventive method is to use a kind of catalyzer that is loaded with platinum, rhenium (or tin), chlorine on the mixed carrier of β zeolite and inorganic oxide.This catalyzer is to be preparation method preparation in 901060232 patents of invention according to above-mentioned application number, and catalyzer contains the weight % that 0.04～2.0%(accounts for catalyzer, down with), be preferably 0.3～0.8% a kind of VIII family precious metal, preferably platinum; Contain 0.05～3.0%, be preferably a kind of halogen of 0.1～2.0%, preferably chlorine; Contain 0.04～2.7%, be preferably a kind of VII of 0.1～1.4%
BFamily's element, preferably rhenium; Or contain 0.04～1.8%, be preferably a kind of IV of 0.1～0.8%
AFamily's element, preferably tin.Surplus is a carrier.This carrier itself contains 20～80% weights, and sending out most is 30～70% heavy β zeolite and 80～20% weights, 70～30% heavy inorganic oxides preferably, aluminum oxide preferably, and preferably gamma-alumina or η aluminum oxide.The β zeolite of preparing by the method in the publication number CN1043450A application for a patent for invention contains 0.5～2.5% weight, preferably 1.0～2.0% a kind of basic metal that weighs, preferably potassium; And contain 0～0.05% weight, 0.05～0.3% heavy a kind of V preferably
AFamily's element, phosphorus preferably, the silica alumina ratio of β zeolite is greater than 25, preferably 40～100.When containing rhenium as catalyzer, should carry out conventional prevulcanized before use and handle, sulphur content is 0.01～0.5% weight, preferably 0.02～0.24% weight.
The used catalyzer of hydrocarbon ils reforming method involved in the present invention can all use above-mentioned catalyzer, but in order to remedy at present weak point in its alkane aromatization poor performance of dual-function catalyst of generally using, also catalyzer that can the present invention is the used use of connecting with dual-function catalyst, make stock oil earlier through behind the dual-function catalyst again by the used catalyzer of the present invention.Reforming method of the present invention can be applied to the fixed bed reaction apparatus of half regenerative, also can be used for the moving bed reactor device of continuous regenerative.
Hydrocarbon ils reforming method of the present invention is applicable to that with alkane and/or naphthenic hydrocarbon be the reforming raw oil of main ingredient, no matter is when being main ingredient with alkane and/or naphthenic hydrocarbon, all to be with C
5～C
12Better, and C
5～C
10For best.It also is applicable to general narrow fraction or width distillate renormalizing stock oil or has contained the stock oil of a certain amount of aromatic hydrocarbons.According to the difference of the hydrocarbon component of raw materials used oil, method of the present invention is applicable to the production high octane gasoline component or is the reforming process of purpose to produce aromatic hydrocarbons.
Reforming method of the present invention can be suitable on existing industrial reformer, also can go design technology process and operational condition according to the requirement of the used specificity of catalyst of the inventive method.From the thermodynamics angle, the low more generation that helps aromatization more of pressure reduces pressure and also can suppress scission reaction to improve liquid product yield.But when reducing pressure, but make speeding up of catalyst activity reduction.On the other hand, from the kinetics angle, increase temperature of reaction and reduce the aromatization activity raising that reaction velocity (promptly improving the duration of contact of catalyzer and hydrocarbon ils) all will make catalyzer, yet scission reaction is speeded up.In addition, the more little generation that helps aromatization more of the hydrogen-oil ratio of reaction will make speeding up of catalyst activity reduction again but hydrogen-oil ratio is too small.Therefore after all multifactor influencing each other more than the balance, the operational condition of the inventive method is:
Reaction pressure: 1.9 * 10
5～4.9 * 10
6Pa., preferably 5.0 * 10
5～3.9 * 10
6Pa.;
Temperature of reaction: 400～600 ℃., preferably 430～550 ℃;
Weight hourly space velocity: 0.1～50, preferably 1～30;
Hydrogen oil molecule ratio: 2～50, preferably 3～15.
Reforming method of the present invention compared with prior art, its advantage is can both adapt to the reforming raw oil that different hydrocarbon are formed, aromatics conversion rate and aromatics yield height, isomerization of paraffins is effective, and sulfur resistance is preferably arranged.Below will be further described reforming method of the present invention by embodiment:
Embodiment 1
Present embodiment is the used preparation that contains beta-zeolite catalyst of the inventive method and makes correlated prior art catalyzer.
1, presses the method for embodiment 1 in the publication number CN1043450A application for a patent for invention prospectus, prepare and contain potassium 1.8% weight, phosphorus 0.08% weight, silica alumina ratio is 60 modified beta zeolite 7 grams, mixes with 3 aluminium hydroxides (West Germany CONDEA product SB trade mark aluminium hydroxide) that restrain, and adds acetic acid (Beijing Chemical Plant, chemical pure) an amount of, mediate extrusion, 120 ℃ of dryings 5 hours, then 550 ℃ of roastings 3 hours.
2, prepare modified beta zeolite 7 grams by above identical method, mix with the aluminium hydroxide (production of oil three factories) of 3 gram stanniferous 0.5% weights (is radix with the alumina content), it is an amount of to add acetic acid, mediates extrusion, with dry, roasting under the above-mentioned same condition.
3, be respectively the Pt(NH of 2.5 mg/ml with the 1st step with platiniferous concentration with prepared carrier of the 2nd step
3)
4Cl
2Solution mixes in the ratio (volume ratio) of 2.4: 1 and 2: 1, after at room temperature soaking 24 hours, 120 ℃ of dryings 5 hours, roasting 3 hours in 300 ℃ of airflows again, reduction is 4 hours in 500 ℃ of hydrogen streams, promptly make platiniferous 0.6% heavy and 0.5% heavy strip catalyst respectively, represent with catalyst A and catalyst B.
4, with catalyst A under the condition of 500 ℃ of hydrogen streams, the hydrogen sulfide that injected 40ml in 15 minutes carries out prevulcanized, purges 1 hour under 500 ℃ of hydrogen streams then, promptly get the pre-sulfide catalyst of sulfur-bearing 0.06% weight, S represents with catalyst A.
5, get present platinum-rhenium-sulphur reforming catalyst (the CB-6 catalyzer that the Chang Ling catalyst plant is produced, platiniferous 0.3% weight, rhenium 0.3% weight, chlorine 1.1% weight, sulphur 0.05% weight, γ-Al used on full scale plant
2O
3Carrier) catalyzer as a comparison, C represents with catalyzer.
Embodiment 2
Present embodiment explanation the inventive method is applied to C
6Pure alkane is the aromatization effect of raw material.
With normal hexane (reagent three factories in Shenyang produce, analytical pure) is raw material, carries out the reactivity worth test on the continuous micro-reactor of the pressurization that Research Institute of Petro-Chemical Engineering installs voluntarily.Reaction conditions is: 480 ℃, and 0.981MPa, weight space velocity 13.2 hours
-1, the hydrogen oil molecule is than 7, and reaction product is with its composition of gc analysis, and reaction result sees Table 1.From the data of table 1 as can be seen, the inventive method is to C
6Alkane aromatization and isomerized effect all obviously surpass the reforming method that uses platinum-rhenium/aluminium oxide catalyst.
Note: 1. productive rate=(reaction back its product amount)/(injecting pure hydrocarbon amount) * 100%
2. total conversion rate=(1-(the pure hydrocarbon amount of unreacted)/(injecting pure hydrocarbon amount)) * 100%
3. arenes selectivity=(aromatics yield)/(total conversion rate)
Embodiment 3
Present embodiment explanation the inventive method is used with C
7Pure alkane is the aromatization effect of raw material.
On the continuous micro-reactor of pressurization, carry out the reactivity worth test with normal heptane (the octane value standard test specimen is measured in Hangzhou Refinery production).Reaction conditions is: 480 ℃, and 0.981MPa, weight space velocity 13.7 hours
-1, the hydrogen oil molecule is than 7, and reaction result sees Table 2.By the data of table 2 as can be seen, the inventive method is for C
7The effect of alkane aromatization also obviously surpasses the reforming method that uses platinum-rhenium/aluminium oxide catalyst.
Embodiment 4
It is the effect of the dehydroisomerization generation aromatic hydrocarbons of raw material that present embodiment explanation the inventive method is applied to five-membered ring alkane.
With methylcyclopentane (Beijing Chemical Plant produces, analytical pure) is raw material, carries out the reactivity worth test on the continuous micro-reactor of pressurization.Reaction conditions is: 480 ℃, and 0.981MPa, weight space velocity 13.5 hours
-1, the hydrogen oil molecule is than 7, and reaction result sees Table 3.By the data of table 3 as can be seen, the inventive method is better than the reforming method that uses platinum-rhenium/aluminium oxide catalyst for the effect that the dehydroisomerization of five-membered ring alkane generates aromatic hydrocarbons.The effect that generates isoparaffin after the naphthenic hydrocarbon open loop is also obvious.The used catalyzer of the inventive method can also further improve the ability that dehydroisomerization changes into aromatic hydrocarbons through (AS) after the prevulcanized, and the ability of inhibition naphthenic hydrocarbon open loop generation structure alkane.
Embodiment 5
Present embodiment is 35 hours data of successive reaction, and being applied to the normal heptane in order to explanation the inventive method is the aromatization effect of raw material, reaches the stability of catalyzer under different operational conditions.
(with embodiment 3) is raw material with normal heptane, carries out the reactivity worth test on the continuous micro-reactor of pressurization.Reaction conditions and the results are shown in Table 4.By the result of table 4 as can be seen, catalyst A that the inventive method is used and AS all have stability preferably, through stable better than without the catalyst A of prevulcanized of the catalyst A S of prevulcanized.
Embodiment 6
It is the aromatization effect of raw material that present embodiment explanation the inventive method is applied to the reforming raffinate oil.
Reforming raffinate oil is after the reformed oil that contains high aromatic hydrocarbons is extracted out aromatic hydrocarbons with the organic solvent that the highly selective energy is arranged, the resulting excess of taking out.Its main component is positive structure and isoparaffin.For the suitability of the inventive method to various different material oil is described, present embodiment is to be raw material with the reforming raffinate oil, the reaction test that carries out on the continuous micro-reactor of pressurization.Used raffinating oil is Tianjin refinery production, and reaction conditions is 430～520 ℃, 0.981MPa, weight space velocity 13.6 hours
-1, the hydrogen oil molecule is than 7, and reaction result sees Table 5.By the data of table 5 as can be seen, the inventive method also is applicable to the reforming raffinate oil to be the aromatization reaction of raw material.Compare with the reforming method that uses platinum-rhenium catalyst in the prior art, the inventive method is superior to existing reforming method.Particularly the difference on the isoparaffin of same carbonatoms and the normal paraffin ratio is particularly remarkable in reaction product, and therefore the octane value of product also will improve.
Embodiment 7
Existing in order to give full play to still in the effect of the dual-function reforming catalyst that uses, remedy its weak point in alkane aromatization poor performance, present embodiment is to make raw material through two reacted reformation the 3rd reactor inlet oil of reforming reactor with simulation, the reaction test of carrying out according to the inventive method.Contrast with catalyzer C simultaneously, condition is: 480～500 ℃, and 0.981MPa, weight space velocity 14.5 hours
-1, the hydrogen oil molecule is than 7.9, and test-results sees Table 6.By the data of table 6 as can be seen, the inventive method still has aromatization effect preferably for the stock oil that contains a certain amount of aromatic hydrocarbons.
Embodiment 8
Present embodiment is the effect that the inventive method is applied to the reforming raw oil on the full scale plant.This reforming raw oil is taken from Beijing yanshan petrochemical factory refinery, and used testing apparatus is that capacity is 100 milliliters of medium-sized reformation testing apparatuss that hydrogen recycle is arranged.The raw material oil properties sees Table 7, and reaction test the results are shown in Table 8.
Table 8
| Reaction conditions pressure, MPa temperature, ℃ air speed (volume), hr -1H2/HC | 1.19 460 2.5 4.8 | 1.19 455 3.5 4.8 | ||
| Catalyzer | A | C | A | C |
| Aromaticity content in the reactant, heavy % benzene toluene C 6Aromatic hydrocarbons C 9The total aromatics conversion rate of aromatic hydrocarbons, % | 10.04 24.42 21.04 6.13 61.63 108.2 | 7.56 17.78 17.52 6.78 49.64 101.5 | 8.94 22.07 22.13 6.40 59.54 111.9 | 6.89 16.69 16.25 6.29 46.12 94.8 |
The data of table 8 show, use the resulting product of the inventive method, be monomer aromaticity content or total aromatic hydrocarbons all apparently higher than the reforming method of prior art, transformation efficiency is also like this.
Embodiment 9
Present embodiment is the further test of embodiment 7.At present industrial in order to give full play to still in the effect of the dual-function reforming catalyst that uses, simultaneously remedy its weak point in the aromizing poor performance with the inventive method, present embodiment is with the inventive method used catalyst A and the used two sections reaction tests of types of feed respectively of catalyzer C do of prior art.Upper and lower section catalyzer of packing at the continuous little anti-reactor of pressurization loads with three kinds of following forms:
Filling form epimere hypomere
I C C
II C AS
III C B
The used stock oil of present embodiment is with embodiment 8, reaction conditions: 460～500 ℃, and 0.981MPa, weight hourly space velocity 15.5 hours
-1, the hydrogen oil molecule is than 6.Test-results sees Table 9.From the data of table 9 as can be seen, the catalyzer that the inventive method is used and the catalyzer of prior art are united when using, and can improve aromaticity content on by a relatively large margin.Under the suitable substantially condition of aromaticity content, unite use (II, III) and can hang down more than 20 ℃ on the temperature of reaction at least than the catalyzer (I) of independent use prior art.Simultaneously, in uniting the product of use, isoparaffin and normal paraffin ratio also are greatly improved, and this also will make the octane value of product significantly improve.
Claims (5)
1, a kind of catalytic reforming method for hydrocarbon oil is characterized in that this method is used at the mixed carrier of β zeolite and inorganic oxide to upload catalyzer with platinum, rhenium (or tin), chlorine, and operational condition is:
Pressure: 1.9 * 10
5～4.9 * 10
6Pa, preferably 5.0 * 10
5～3.9 * 10
6Pa;
Temperature: 400～600 ℃, preferably 430～550 ℃.;
Weight hourly space velocity: 0.1～50, preferably 1～30;
Hydrogen oil molecule ratio: 2～50, preferably 3～15.
2,, it is characterized in that the composition of said catalyzer is according to the catalystic reforming method of claim 1:
A kind of VIII family precious metal, better with platinum, its content is 0.04～2.0% weight, with 0.3～0.8% heavy better (account for the weight % of catalyzer, down with);
A kind of haloid element, better with chlorine, its content is 0.05～3.0% weight, and is better heavy with 0.1～2.0%;
A kind of VIII
BFamily's element, better with rhenium, its content is 0.04～2.7% weight, with 0.1～1.4% weight better, or a kind of IV
AFamily's element, better with tin, its content is 0.04～1.8% weight, and is better heavy with 0.1～0.8%;
Surplus is a carrier.
3, according to the said catalyzer of claim 2, it is characterized in that carrier is to be made of β zeolite and inorganic oxide, the content of β zeolite in carrier is 80～20% weights, better heavy with 70～30%, the content of inorganic oxide in carrier is 20～80% weights, with 30～70% weights better, in the β zeolite, contain again:
A kind of basic metal, better with potassium, its content is 0.5～2.5% weight, with 1.0～2.0% heavy better (accounting for the weight percent of β zeolite, down together);
A kind of V
AFamily's element, better with phosphorus, its content is 0～0.5% weight, and is better heavy with 0.05～0.3%;
The sial molecular ratio of β zeolite is greater than 25, and with 40～100 better, inorganic oxide is better with aluminum oxide or silicon oxide, and best with gama-alumina or η-aluminum oxide.
4, according to the catalystic reforming method of claim 1, it is characterized in that used stock oil can be the conventional hydrorefined reforming raw oil that passes through, also can be C
5～C
12Alkane or naphthenic hydrocarbon, also can be the reformation intermediates oil that has contained a certain amount of aromatic hydrocarbons, the sulphur content in the stock oil below 2ppm, with below 1ppm better.
5, according to the catalystic reforming method of claim 1, it is characterized in that and can use separately by the catalyzer that present method is used, also can be with dual-function catalyst segmentation filling associating use used in this catalyzer and the prior art.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN91108425A CN1026244C (en) | 1991-12-12 | 1991-12-12 | Catalytic reforming method for hydrocarbon oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN91108425A CN1026244C (en) | 1991-12-12 | 1991-12-12 | Catalytic reforming method for hydrocarbon oil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1073197A true CN1073197A (en) | 1993-06-16 |
| CN1026244C CN1026244C (en) | 1994-10-19 |
Family
ID=4910671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN91108425A Expired - Fee Related CN1026244C (en) | 1991-12-12 | 1991-12-12 | Catalytic reforming method for hydrocarbon oil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1026244C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0653411A2 (en) * | 1993-11-08 | 1995-05-17 | Texaco Development Corporation | Synthesis of alkyl t-alkyl ether |
| CN1048425C (en) * | 1994-08-22 | 2000-01-19 | 中国石油化工总公司 | Catalyst and method for converting heavy arene into light one |
| CN102796553A (en) * | 2011-05-27 | 2012-11-28 | 中国石油化工股份有限公司 | Catalytic reforming method for naphtha |
| CN102925206A (en) * | 2012-10-31 | 2013-02-13 | 成都易态科技有限公司 | Membrane filtration element for catalytic reforming and preparation method thereof |
| CN115999596A (en) * | 2021-10-21 | 2023-04-25 | 中国石油化工股份有限公司 | Catalyst for preparing aromatic hydrocarbon by dehydrogenation of six-membered cycloalkane and preparation method thereof |
-
1991
- 1991-12-12 CN CN91108425A patent/CN1026244C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0653411A2 (en) * | 1993-11-08 | 1995-05-17 | Texaco Development Corporation | Synthesis of alkyl t-alkyl ether |
| EP0653411A3 (en) * | 1993-11-08 | 1995-05-24 | Texaco Development Corporation | Synthesis of alkyl t-alkyl ether |
| CN1048425C (en) * | 1994-08-22 | 2000-01-19 | 中国石油化工总公司 | Catalyst and method for converting heavy arene into light one |
| CN102796553A (en) * | 2011-05-27 | 2012-11-28 | 中国石油化工股份有限公司 | Catalytic reforming method for naphtha |
| CN102796553B (en) * | 2011-05-27 | 2015-07-29 | 中国石油化工股份有限公司 | A kind of Benzin naphtha catalytic reforming method |
| CN102925206A (en) * | 2012-10-31 | 2013-02-13 | 成都易态科技有限公司 | Membrane filtration element for catalytic reforming and preparation method thereof |
| CN102925206B (en) * | 2012-10-31 | 2015-06-10 | 成都易态科技有限公司 | Membrane filtration element for catalytic reforming and preparation method thereof |
| CN115999596A (en) * | 2021-10-21 | 2023-04-25 | 中国石油化工股份有限公司 | Catalyst for preparing aromatic hydrocarbon by dehydrogenation of six-membered cycloalkane and preparation method thereof |
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| Publication number | Publication date |
|---|---|
| CN1026244C (en) | 1994-10-19 |
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