CN103923689A - Catalytic cracking sulfur-reducing auxiliary agent and preparation method thereof, and method for reducing sulfur content in catalytic cracking gasoline - Google Patents
Catalytic cracking sulfur-reducing auxiliary agent and preparation method thereof, and method for reducing sulfur content in catalytic cracking gasoline Download PDFInfo
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Abstract
The invention discloses a preparation method for a catalytic cracking sulfur-reducing auxiliary agent, a catalytic cracking sulfur-reducing auxiliary agent prepared by the preparation method, and a method for reducing sulfur content in catalytic cracking gasoline by using the catalytic cracking sulfur-reducing auxiliary agent. With the provided catalytic cracking sulfur-reducing auxiliary agent, the sulfur content of the gasoline can be reduced; meanwhile, yield of the catalytic cracking gasoline is increased.
Description
Technical field
The present invention relates to a kind of catalytic cracking sulfur reduction additive, and the preparation method of this catalytic cracking sulfur reduction additive, and use this catalytic cracking sulfur reduction additive to reduce the method for Sulfur Content in Catalytic Cracking Gasoline.
Background technology
Current, atmosphere environmental regulation increasingly stringent.For meeting the laws and regulations requirement to motor vehicle exhaust, the sulphur content significantly reducing in gasoline becomes the important topic that China's oil refining industry faces.In China, produce in the complete processing of petrol and diesel oil, catalytic cracking process is core process process, and diesel oil more than more than 70% gasoline and 30% of China is all from catalytic cracking process.The sulphur content that this just makes to reduce in the gasoline that catalytic cracking process obtains, becomes the top priority that reduces the sulphur content in gasoline.
The method of existing reduction sulfur content of catalytic cracking gasoline comprises uses low-sulfur raw material oil (buying sweet crude oil or the hydrogenating desulfurization of fcc raw material oil), catalytic gasoline hydrogenation desulfurization or adsorption desulfurize, and also having is exactly to use and have catalyzer or the auxiliary agent that falls sulfur functional in catalytic cracking process.
Stock oil hydrogenating desulfurization says it is suitable from sweetening effectiveness, but investment is large and hydrogen consumption is high.Catalytic gasoline hydrogenation sweetening effectiveness is also fine, but also has large and the large problem of loss of octane number of investing.
Therefore in catalytic cracking process, use catalyzer agent or the auxiliary agent with desulfurizing function to become the method generally adopting at present.
US5376608A discloses a kind of catalytic cracking catalyst compositions.The Lewis acid that said composition contains molecular sieve, inorganic oxide carrier and contains aluminum oxide, selected Lewis acid comprises the elements such as zinc, copper, nickel, loads on aluminum oxide.Although said composition can reduce sulfur content of catalytic cracking gasoline, gasoline yield does not improve.
US2011120911A1 discloses a kind of method that reduces the sulphur content of catalytically cracked gasoline cut, and the method is used and contained molecular sieve, yttrium and be selected from a kind of element in zinc, magnesium and manganese.The method has reduced the sulphur content in gasoline, but yield of gasoline has reduced.
US6482315B1 discloses a kind of sulphur content method in reduction catalytically cracked gasoline cut.The assistant for calalytic cracking that the method is used is used the vanadium oxide of alumina load as the active component that falls sulphur.Although this auxiliary agent can reduce sulfur content of catalytic cracking gasoline, itself does not have catalytic cracking activity, and the v element adding can cause catalytic cracking catalyst poisoning, affects the reactive behavior of catalyzer host.
US20070249495A1 discloses a kind of sulfur-lowing catalyst that reduces sulphur content in catalytically cracked gasoline product.The vanadium metal acid compound that this catalyzer contains carrier and load, wherein metal is selected from rare earth metal, Zn, Mn, Zr, Al, Mg, Ni and Cu.Although this catalyzer has the effect of falling sulphur, the v element of introducing can cause that catalytic cracking catalyst is poisoning.
As can be seen here, although have at present the sulfur prodegradant that can reduce Sulfur Content in Catalytic Cracking Gasoline, can realize Sulfur Content in Catalytic Cracking Gasoline reduces, but adopt existing sulfur prodegradant also can reduce the yield of gasoline simultaneously, what have even also can bring poisoning impact to catalytic cracking catalyst, makes catalytic cracking process produce the decline in benefits of gasoline.
Summary of the invention
Although the object of the invention is to overcome existing catalytic cracking sulfur reduction additive, can reduce the sulphur content in gasoline, can reduce the defect of yield of gasoline, a kind of catalytic cracking sulfur reduction additive and its preparation method and application is provided.
To achieve these goals, the invention provides a kind of preparation method of catalytic cracking sulfur reduction additive, the method comprises the following steps: (1) mixes making beating for the first time by molecular sieve, clay, pseudo-boehmite and aluminium colloidal sol, obtains the first slurries; (2) described the first slurries are mixed to making beating for the second time with titanium-containing compound, obtain the second slurries; (3) described the second slurries are dried and roasting successively.
The present invention also provides prepared according to the methods of the invention catalytic cracking sulfur reduction additive.
The present invention also provides a kind of method that reduces Sulfur Content in Catalytic Cracking Gasoline, the method comprises: under catalytic cracking reaction condition, the catalyzer that contains sulfur prodegradant is contacted with hydrocarbon oil containing surphur, and wherein, described sulfur prodegradant is catalytic cracking sulfur reduction additive provided by the invention.
By technical scheme provided by the invention, in the catalytic cracking reaction process of hydrocarbon oil containing surphur, adopt the catalytic cracking sulfur reduction additive of preparing according to method provided by the invention, owing to having introduced titanium oxide component, the sulphur content in the gasoline of acquisition can not only be reduced, the yield of gasoline products can also be improved.Particularly, while using the cat-1 catalyst reaction of the catalytic cracking sulfur reduction additive SAC-1 that contains embodiment 1 preparation, the sulfur content in gasoline of acquisition is reduced to 261 μ g/g, and yield of gasoline is 43.4%.During the cat-6 catalyst reaction of the comparative catalyst D1 that use contains comparative example 1 preparation, the sulfur content in gasoline of acquisition is 310 μ g/g, and yield of gasoline is 42.0%.As can be seen here, the catalytic cracking sulfur reduction additive that adopts preparation method provided by the invention to obtain, can realize reduction content of sulfur in gasoline, improves the goal of the invention of yield of gasoline simultaneously.
Other features and advantages of the present invention partly in detail are described the embodiment subsequently.
Embodiment
Below the specific embodiment of the present invention is elaborated.Should be understood that, embodiment described herein only, for description and interpretation the present invention, is not limited to the present invention.
The preparation method who the invention provides a kind of catalytic cracking sulfur reduction additive, the method comprises the following steps:
(1) molecular sieve, clay, pseudo-boehmite and aluminium colloidal sol are mixed to making beating for the first time, obtain the first slurries;
(2) described the first slurries are mixed to making beating for the second time with titanium-containing compound, obtain the second slurries;
(3) described the second slurries are dried and roasting successively.
According to the present invention, in step (1), in butt, the described catalytic cracking sulfur reduction additive of preparing with respect to 100 weight parts, the consumption of described molecular sieve is 25-45 weight part, is preferably 30-40 weight part; The consumption of described clay is 20-60 weight part, is preferably 30-40 weight part; The consumption of described pseudo-boehmite is 10-20 weight part, is preferably 12-18 weight part; The consumption of described aluminium colloidal sol is 2-15 weight part, is preferably 4-8 weight part.
In the present invention, in butt, refer to by molecular sieve, clay, pseudo-boehmite and aluminium colloidal sol respectively after roasting the weighing scale of the calcining matter obtaining with each material.Catalytic cracking sulfur reduction additive with respect to preparation is with respect to the catalytic cracking sulfur reduction additive obtaining after roasting.
According to the present invention, described molecular sieve can be the conventional various molecular sieves that use in this area.Under preferable case, described molecular sieve contains REY molecular sieves more than 50 % by weight, more preferably contains REY molecular sieve more than 80-95 % by weight.In described REY molecular sieve, the content of rare earth of rare earth oxide of take can be 10-20 % by weight, is preferably 14-18 % by weight.Described rare earth oxide can be one or more in lanthanum trioxide, cerium oxide and Samarium trioxide.
According to the present invention, described molecular sieve can also contain other molecular sieves of 0.1-50 % by weight, and described other molecular sieves are at least one being selected from MFI structure molecular screen, USY molecular sieve and REUSY molecular sieve.Under preferable case, other molecular sieves that contain 5-20 % by weight.
In the present invention, described clay can be the conventional various clays that use in this area, for example can be for being selected from least one in kaolin, halloysite, sepiolite, polynite, wilkinite, halloysite, diatomite, saponite, rectorite, attapulgite and hydrotalcite.Under preferable case, described clay is kaolin and/or halloysite.
In the present invention, described in step (1), mix for the first time making beating, can take the conventional methods of beating using of this area catalyzer preparation, for example molecular sieve, clay and pseudo-boehmite first can be mixed into respectively to the slurries of certain solid content with water, and then successively each slurries and aluminium colloidal sol are mixed, obtain the first slurries.Described mixing for the first time pulls an oar and can, at 25-40 ℃ of temperature, in the conventional making beating tank using in this area, carry out.Described mixing for the first time pulls an oar and can within 20-40 minute, complete through stirring.
According to the present invention, in step (2), the described catalytic cracking sulfur reduction additive of preparing with respect to 100 weight parts, it is 3-20 weight part that described titanium-containing compound be take the consumption of titanium oxide, is preferably 6-10 weight part.
According to the present invention, described titanium-containing compound, for introducing titanium oxide to the described catalytic cracking sulfur reduction additive of preparation, can be used the various titanium-containing compounds that can realize this object, and under preferable case, described titanium-containing compound can be organic titanic compound.Further preferably, described titanium-containing compound is at least one in tetrabutyl titanate, titanium sulfate and titanium tetrachloride.
In the present invention, in step (2), described, mix for the second time before making beating, can be first described titanium-containing compound and water be mixed into the aqueous solution of described titanium-containing compound, wherein take the described titanium-containing compound of titanium elements and the mol ratio of described water can be 1:2-30.It is described that to mix for the second time making beating can be the making beating that mixes of the aqueous solution of described the first slurries and described titanium-containing compound.
In the present invention, the described making beating of mixing for the second time temperature can be 25-40 ℃.Described mixing for the second time pulls an oar and can within 20-40 minute, complete through stirring.
According to the present invention, the dry and roasting of carrying out in step (3) can be taked the conventional method of using in this area.Conventional cracking catalyst as described in CN1727442A is dried the condition with roasting, if drying temperature can be room temperature to 200 ℃, is preferably 80-180 ℃; Maturing temperature can be 200-750 ℃, is preferably 300-600 ℃; Roasting time is at least 0.1 hour, is preferably 0.1-10 hour, more preferably 0.3-4 hour.Described dry method can adopt existing various drying means, as dried or spray-dired method.
In the present invention, in step (3), can further include afterwards the described catalytic cracking sulfur reduction additive that roasting is obtained and wash and be dried.Can take the conventional method of using in this area, as used the water washing 0.5-4 hour of 40-90 ℃; Dry can carrying out in pneumatic dryer, drying temperature can be 100-200 ℃, can be 0.5-3 hour time of drying.
The present invention also provides prepared according to the methods of the invention catalytic cracking sulfur reduction additive.
The present invention also provides a kind of method that reduces Sulfur Content in Catalytic Cracking Gasoline, the method comprises: under catalytic cracking reaction condition, the catalyzer that contains sulfur prodegradant is contacted with hydrocarbon oil containing surphur, and wherein, described sulfur prodegradant is catalytic cracking sulfur reduction additive provided by the invention.
According to the present invention, described catalytic cracking reaction condition can be the conventional condition of using in this area, and under preferable case, described catalytic cracking reaction condition comprises: temperature of reaction is 460-540 ℃, more preferably 485-500 ℃; Agent-oil ratio (weight ratio of catalyzer and hydrocarbon ils) is 4-20, more preferably 6-10.
In the method for reduction Sulfur Content in Catalytic Cracking Gasoline of the present invention, described sulfur prodegradant can mix together with catalytic cracking catalyst, for example, according to weight ratio, be that 1:3-6 mixes use with equilibrium catalyst for catalytic cracking process.Described hydrocarbon oil containing surphur can be the various raw materials for catalytic cracking reaction, for example, can be at least one in long residuum, vacuum residuum, VGO and hydrogenation tail oil.The sulphur content of described sulfur crude can be 0.1-1.5 % by weight.
The method of reduction Sulfur Content in Catalytic Cracking Gasoline of the present invention can be carried out in fluidized-bed reactor and/or riser reactor, also can in fixed-bed reactor, carry out.
Below will describe the present invention by embodiment.
In following examples, the total pore volume of catalytic cracking sulfur reduction additive and mesopore pore volume, according to the standard method of RIPP151-90 (referring to volumes such as < < Petrochemical Engineering Analysis method > > (RIPP test method) Yang Cuiding, Science Press, nineteen ninety publishes) record.
The abrasion index of catalytic cracking sulfur reduction additive records according to the method for ASTM D5757-00 (2006).
In following examples, use raw material condition as follows:
REY molecular sieve, purchased from China Petrochemical Industry's catalyst Co. Chang Ling branch office, trade mark CDY, rare earth oxide content is 16.2 % by weight;
USY molecular sieve, purchased from China Petrochemical Industry's catalyst Co. Chang Ling branch office;
ZRP molecular sieve, purchased from Hunan Jian Chang company, silica alumina ratio 120;
Pseudo-boehmite, purchased from Shanxi Aluminium Plant product, alumina content is 60.2 % by weight;
Aluminium colloidal sol, purchased from Hunan Jian Chang company, alumina content is 21.8 % by weight;
Halloysite, purchased from Cenxi, Hunan kaolin company, solid content 72.0 % by weight;
Kaolin, purchased from China Kaolin Co., Ltd's product, solid content 70.0 % by weight;
Tetrabutyl titanate, purchased from Beijing Chemical Plant company.
Embodiment 1
The present embodiment is for illustrating the preparation method of catalytic cracking sulfur reduction additive of the present invention.
(1) the REY molecular sieve pulp that is 30 % by weight by 700.0 grams of solid contents successively, 179.4 grams of pseudo-boehmites, 192.7 grams of aluminium colloidal sols and 325.0 grams of halloysites add making beating tank, mix making beating and within 30 minutes, obtain the first slurries A1;
(2) the first slurries A1 is mixed to making beating 20 minutes with the solution of 280.8 grams of tetrabutyl titanates and 59.0 grams of water formation, obtain the second slurries B1;
(3) the second slurries B1 is sprayed successively after dry, roasting, hot wash, drier, obtain sulfur prodegradant SAC-1; Spraying drying temperature is 450 ℃; Maturing temperature is 500 ℃, and roasting time is 1 hour.
Wherein, according to charging capacity, calculate and learn, with respect to the SAC-1 of 100 weight parts, the content of titanium oxide is 10 weight parts.
Embodiment 2
The present embodiment is for illustrating the preparation method of catalytic cracking sulfur reduction additive of the present invention.
(1) by 700.0 grams of solid contents, be that the slurries that are comprised of 95 % by weight REY molecular sieves and 5 % by weight USY molecular sieves of 30 % by weight, 179.4 grams of pseudo-boehmites, 192.7 grams of aluminium colloidal sols and 257.1 grams of kaolin add making beating tank successively, mix making beating and within 30 minutes, obtain the first slurries A2.
(2) the first slurries A2 is mixed to making beating with the solution of 199.8 grams of tetrabutyl titanates and 42.0 grams of water formation, after 30 minutes, obtain the second slurries B2.
(3) the second slurries B2 is sprayed successively after dry, roasting, hot wash, drier, obtain sulfur prodegradant SAC-2; Spraying drying temperature is 450 ℃; Maturing temperature is 500 ℃, and roasting time is 1 hour.
Wherein, according to charging capacity, calculate and learn, with respect to the SAC-2 of 100 weight parts, the content of titanium oxide is 8 weight parts.
Embodiment 3
The present embodiment is for illustrating the preparation method of catalytic cracking sulfur reduction additive of the present invention.
(1) by 700.0 grams of concentration, be that the slurries that are comprised of 80 % by weight REY molecular sieves and 20 % by weight ZRP molecular sieves of 30 % by weight, 179.4 grams of pseudo-boehmites, 192.7 grams of aluminium colloidal sols and 334.3 grams of kaolin add making beating tank successively, mix making beating and within 30 minutes, obtain the first slurries A3.
(2) the first slurries A3 is mixed to making beating with the solution of 161.3 grams of tetrabutyl titanates and 33.9 grams of water formation, after 20 minutes, obtain the second slurries B3.
(3) the second slurries B3 is sprayed successively after dry, roasting, hot wash, drier, obtain sulfur prodegradant SAC-3; Spraying drying temperature is 450 ℃; Maturing temperature is 500 ℃, and roasting time is 1 hour.
Wherein, according to charging capacity, calculate and learn, with respect to the SAC-3 of 100 weight parts, the content of titanium oxide is 6 weight parts.
Embodiment 4
According to the method for embodiment 1, different, with 631.9 grams of tetrabutyl titanates and 132.7 grams of water, substitute 280.8 grams of tetrabutyl titanates and 59.0 grams of water.Obtain sulfur prodegradant SAC-4.
Wherein, according to charging capacity, calculate and learn, with respect to the SAC-4 of 100 weight parts, the content of titanium oxide is 20 weight parts.
Embodiment 5
According to the method for embodiment 1, different, with 78.2 grams of tetrabutyl titanates and 16.4 grams of water, substitute 280.8 grams of tetrabutyl titanates and 59.0 grams of water.Obtain sulfur prodegradant SAC-5.
Wherein, according to charging capacity, calculate and learn, with respect to the SAC-5 of 100 weight parts, the content of titanium oxide is 3 weight parts.
Comparative example 1
According to the method for embodiment 1, different, there is no step (2), the first slurries A1 is directly carried out to step (3), obtain comparative catalyst D1.
Wherein, in comparative catalyst D1, do not contain titanium oxide.
Test case 1
Measure the catalytic cracking sulfur reduction additive SAC-1 to 5 that above-described embodiment 1-5 and comparative example 1 obtain, and the total pore volume of comparative catalyst D1 and mesopore pore volume; Measure the catalytic cracking sulfur reduction additive SAC-1 to 5 that above-described embodiment 1-5 and comparative example 1 obtain, and the abrasion index of comparative catalyst D1.Measurement result is as shown in table 1 below.
Table 1
| Catalyzer numbering | Abrasion index | Total pore volume (ml/g) | Specific surface area (m 2/g） |
| SAC-1 | 1.2 | 0.21 | 287 |
| SAC-2 | 1.5 | 0.21 | 272 |
| SAC-3 | 1.4 | 0.21 | 264 |
| SAC-4 | 1.8 | 0.21 | 278 |
| SAC-5 | 1.0 | 0.21 | 248 |
| D1 | 1.0 | 0.20 | 280 |
Embodiment 6
The present embodiment is for illustrating the method for reduction Sulfur Content in Catalytic Cracking Gasoline of the present invention.
Catalytic cracking sulfur reduction additive SAC-1 to 5 prepared by above-described embodiment 1-5 under 800 ℃, 100% water vapor aging 17 hours respectively.
Auxiliary agent through overaging and poiser (refinery branch office catalysis workshop, China National Offshore Oil Corporation Huizhou) are mixed to get to cat-1, cat-2, cat-3, cat-4, cat-5 by the weight ratio of 20:80.
Poiser and cat-1 to 5 are filled in respectively in fixed fluidized bed device (purchased from The Earth S. A. of Sinopec Research Institute of Petro-Chemical Engineering), and amount of fill is 150g; Then, temperature of reaction, the weight hourly space velocity of 500 ℃, be 30h
-1, under agent-oil ratio (weight) condition that is 7, by forming raw material hydrocarbon ils as shown in table 2, inject described fixed fluidized bed device and carry out catalytic cracking reaction, and analyze the composition of catalytic cracking reaction product, result is as shown in table 3 below.
Comparative example 2
According to the method for embodiment 6, different, the SAC-1 to 5 with comparative catalyst D1 alternate embodiment 1-5, is mixed to get cat-6 with poiser.Result is as shown in table 3 below.
Table 2
| Raw material hydrocarbon ils | Parameter |
| Density (20 ℃) (kgm -3） | 933.3 |
| Carbon residue (% by weight) | 9.83 |
| Stable hydrocarbon (% by weight) | 50.7 |
| Aromatic hydrocarbons (% by weight) | 38.7 |
| Colloid (% by weight) | 6.2 |
| Bituminous matter (% by weight) | 4.4 |
| Sulphur content (% by weight) | 0.2758 |
Table 3
Data by table 3 can find out, the sulfur content in gasoline that balance agent reaction obtains is 320 μ g/g, and while using cat-6, sulfur content in gasoline is 310 μ g/g, and the sulfur content in gasoline that reaction obtains while using cat-1 catalyzer is 261 μ g/g.When sulphur object falls in realization, the yield of gasoline that uses cat-1 catalyst reaction to obtain is 43.4%, and the yield of gasoline 41.7% that can obtain than balance agent reaction, improves 1.7 percentage points; Yield of gasoline 42.0% than using cat-6 reaction to obtain, improves 1.4 percentage points.
Therefore, the catalytic cracking sulfur reduction additive that adopts preparation method provided by the invention to obtain, can significantly reduce content of sulfur in gasoline, improves yield of gasoline simultaneously.
Claims (10)
1. a preparation method for catalytic cracking sulfur reduction additive, the method comprises the following steps:
(1) molecular sieve, clay, pseudo-boehmite and aluminium colloidal sol are mixed to making beating for the first time, obtain the first slurries;
(2) described the first slurries are mixed to making beating for the second time with titanium-containing compound, obtain the second slurries;
(3) described the second slurries are dried and roasting successively.
2. method according to claim 1, wherein, in step (1), in butt, the described catalytic cracking sulfur reduction additive of preparing with respect to 100 weight parts, the consumption of described molecular sieve is 25-45 weight part, is preferably 30-40 weight part; The consumption of described clay is 20-60 weight part, is preferably 30-40 weight part; The consumption of described pseudo-boehmite is 10-20 weight part, is preferably 12-18 weight part; The consumption of described aluminium colloidal sol is 2-15 weight part, is preferably 4-8 weight part.
3. method according to claim 1 and 2, wherein, described molecular sieve contains REY molecular sieves more than 50 % by weight.
4. method according to claim 3, wherein, described molecular sieve also contains other molecular sieves of 0.1-50 % by weight, and described other molecular sieves are at least one being selected from MFI structure molecular screen, USY molecular sieve and REUSY molecular sieve.
5. method according to claim 1, wherein, in step (2), the described catalytic cracking sulfur reduction additive of preparing with respect to 100 weight parts, it is 3-20 weight part that described titanium-containing compound be take the consumption of titanium oxide, is preferably 6-10 weight part.
6. method according to claim 1 or 5, wherein, described titanium-containing compound is organic titanic compound.
7. method according to claim 6, wherein, described titanium-containing compound is at least one in tetrabutyl titanate, titanium sulfate and titanium tetrachloride.
8. the catalytic cracking sulfur reduction additive of preparing according to the method described in any one in claim 1-7.
9. a method that reduces Sulfur Content in Catalytic Cracking Gasoline, the method comprises: under catalytic cracking reaction condition, the catalyzer that contains sulfur prodegradant is contacted with hydrocarbon oil containing surphur, it is characterized in that, described sulfur prodegradant is catalytic cracking sulfur reduction additive claimed in claim 8.
10. method according to claim 9, wherein, described catalytic cracking reaction condition comprises: temperature of reaction is 460-540 ℃, agent-oil ratio is 6-10.
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| CN112108176A (en) * | 2019-06-21 | 2020-12-22 | 中国石油天然气股份有限公司 | Preparation method of catalyst for reducing sulfur content of catalytically cracked gasoline |
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Effective date of registration: 20170418 Address after: 516086 Huizhou, Dayawan, Australia, the first Petrochemical Road, No. 302, No. Co-patentee after: Beijing University of Chemical Technology Patentee after: CNOOC Huizhou Petrochemical Co., Ltd. Address before: 516082 Guangdong, Dayawan Petrochemical Road, No. 29, No. 302 box Co-patentee before: Beijing University of Chemical Technology Patentee before: Huizhou Refinery Branch, CNOOC Oil & Petrochemicals Co., Ltd. |
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