| Start of section
Production, amateur Radio amateurs Aircraft model, rocket-model Useful, entertaining |
Stealth Master
Electronics Physics Technologies Inventions |
Secrets of the cosmos
Secrets of the Earth Secrets of the Ocean Tricks Map of section |
  |
| Use of the site materials is allowed subject to the link (for websites - hyperlinks) | |||
Navigation: => |
Home / Patent catalog / Catalog section / Back / |
|
INVENTION
Patent of the Russian Federation RU2109792
METHOD OF PRODUCTION OF LOW-FORGED PETROLEUM PRODUCTS
The name of the inventor: DF Train; Konovalchikov O.D .; Misko OM; Krasilnikova LA; Zelentsov Yu.N .; Porublev MA; Babikov AF; Elshin AI; Tselutina M.I.
The name of the patent holder: Open Joint-Stock Company "Angarsk petrochemical company"
Address for correspondence:
Date of commencement of the patent: 1996.03.29
The invention relates to oil refining, in particular, to methods for producing low-ash oils, hydraulic fluids, diesel and aviation fuels. At present, the most effective methods for obtaining low-solidified petroleum products are processes using catalytic dewaxing on catalysts based on silica zeolites. High-silica zeolites are used in the hydrogen form. A common disadvantage of the known methods is their relatively low productivity, due to the insufficient activity of the catalysts used. The object of the invention is to increase the productivity of catalytic dewaxing processes and the quality of the target products obtained. The goal is achieved by the fact that the process for obtaining low-hardening petroleum products by catalytic dewaxing of the corresponding petroleum distillates is carried out on a catalyst containing a mixed polyvalent and hydrogen form of the high-silica zeolite with a sodium exchange rate in the initial zeolite per polyvalent cation or a mixture thereof of at least 50% by weight with a total degree Exchange of not less than 95% by weight and the process is carried out under the following conditions: T = 260-380 ° C; P = 4 - 5 MPa; V = 2-6 h -1 ; Н 2 / raw materials = 500 - 1500. The proposed method for obtaining low-hardening petroleum products allows to increase the productivity of catalytic dewaxing processes and the quality of the target products 2-3 times (low-temperature properties, thermal-oxidative stability).
DESCRIPTION OF THE INVENTION
The invention relates to oil refining, in particular to processes for producing low-hardening oils, hydraulic fluids, diesel and aviation fuels.
At present, the most effective methods for obtaining low-solidification petroleum products are processes using catalytic dewaxing on catalysts based on high-silica zeolites in hydrogen form.
Thus, according to [1], the process of obtaining low-hardening petroleum products is carried out on a catalyst containing high-silica zeolite of a CVM or CEC in hydrogen form, hydrogenating components, boron oxide and a binder (Al 2 O 3 ) under the following conditions: T = (280-350) o C ; P = (4 - 5) MPa; V = 1 h -1 ; H 2 / feed = 1000.
Based on the hydrogen form of the ZEO zeolite, an industrial catalyst SGK-1 was developed [2], in which, by catalytic dewaxing of an oil distillate (250-430) oC, a method for producing a transformer oil (T = -45 ° C) is realized under the following conditions: T = 340 ° C; P = (4 - 5) MPa; V = 1 h -1 ; H 2 / feed = 1000.
A common disadvantage of the known methods is their relatively low productivity, due to the insufficient activity of the catalysts used.
The object of the invention is to increase the productivity of catalytic dewaxing processes and the quality of the target products obtained.
The goal is achieved by the fact that the process is carried out on a catalyst containing a mixed polyvalent and hydrogen form of the high-silica zeolite with a degree of sodium exchange in the initial zeolite to a polyvalent cation or a mixture of polyvalent cations of at least 50% by weight with a total degree of exchange of at least 95% And the process is carried out under the following conditions: temperature T = (260-380) ° C; Pressure P (4 - 5) MPa; The volumetric feed rate V = (2 - 6) h -1 ; The ratio H 2 / feed = 500 - 1500.
The proposed method for obtaining low-hardening petroleum products allows to increase the productivity of catalytic dewaxing processes and the quality of the target products 2 to 3 times (low-temperature properties, thermal-oxidative stability).
Example 1 . Catalytic dewaxing is subjected to a fraction of the transformer oil (hydrocracking product) of the following quality: fr. (240-420) o C containing 25.6 wt% naphthalene hydrocarbons; 6.3 wt.% Of aromatic hydrocarbons and solidifying at + 15 ° C. The process is carried out on a catalyst similar to the prototype based on high-silica zeolite CMC in various polyvalent forms (see Table 1) under the conditions: T = 320 ° C; P = 4 MPa; V = 2 h -1 ; H 2 / feed = 1000. In the same conditions, the results of the prototype test are given. The results of the tests are shown in Table. 2.
Example 2 . Catalytic dewaxing was subjected to a transformer oil fraction according to example 1 under the same conditions on a catalyst, wt.% NiO-4.0; MoO 3 8.0; Zeolite FeNCBM - 67.0; Al 2 O 3 is the rest. A transformer oil base is obtained with a yield of 83.3% by weight with a pour point of 47 ° C. and an acid number of 0.008.
Example 3 . Catalytic dewaxing was subjected to a transformer oil fraction according to example 1 under the same conditions on a catalyst, wt.% NiO-3.0; WO 3 - 9.0; Zeolite FeNCBM - 67.0; Al 2 O 3 is the rest. A transformer oil base is obtained with a yield of 83.6% by weight with a pour point of 49 ° C. and an acid number of 0.003.
Example 4 . Catalytic dewaxing is subjected to a straight-run diesel fraction (190-360) o C containing 0.5% by weight sulfur and solidified at -9 ° C on a catalyst, by weight: NiO-16.0; WO 3 - 24.0; Zeolite FeNCBM - 40.0; Al 2 O 3 is the rest. Process conditions: T = 340 ° C; P = 4 MPa; V = 3.5 h -1 ; H 2 / feedstock 1000. Diesel fuel was produced in the output of 85% by weight, solidified at -48 ° C and containing 0.18% by weight of sulfur, which meets the requirements of GOST for northern diesel fuel.
Example 5 . Catalytic dewaxing is subjected to a diesel fraction according to example 4 under the conditions: T = 380 ° C; P = 5 MPa; V = 6 h -1 ; H 2 / feed = 1000. A diesel fuel is obtained with a yield of 84.0% by weight, solidifying at -47.0 ° C and containing 0.17% by weight of sulfur.
Example 6 . The hydraulic oil fraction (220-320) o C (hydrocracked product) containing 6.8 weight percent aromatic hydrocarbons is subjected to dewaxing on a catalyst, %: NiO - 3.0; WO 3 - 9.0; Zeolite FeNCBM - 67.0; Al 2 O 3 is the rest. Process conditions: T = 280 ° C; P = 5 MPa; V = 2 h -1 ; H 2 / feed = 1000. A hydraulic oil base was obtained with a pour point of -80 ° C. and good viscosity-temperature properties.
Example 7 . Catalytic dewaxing is subjected to hydrotreated kerosene boiling within (160-280) ° C containing 21% by weight of n-paraffinic hydrocarbons having a crystallization start temperature of -34 ° C on the catalyst of Example 6. Test conditions: T = 260 ° C ; P = 5 MPa; V = 2 h -1 ; H 2 / feed = 1000. An aviation fuel component was obtained with a yield of 80.0% by weight and a crystallization start temperature of -66 ° C.
In accordance with the examples given, the recommended method allows (Example 1) to increase the process productivity (V = 2 h -1 ) of the dewaxing of the transformer distillate by a factor of 2 compared to the existing one (V = 1 h -1 ). Under the conditions of the proposed method, the known method does not provide the desired product with the desired pour point (-45) ° C.
The decrease in the cation exchange of sodium in the initial zeolite by a polyvalent cation is below 50% by weight (see Table 2) with a total degree of exchange of at least 90 wt. % Is impractical due to a decrease in the activity of the catalyst.
The maximum exchange of the zeolite of a digital computer only with a polyvalent cation (see sample 7) does not provide the required activity of the catalyst.
The use of cation-decationated forms (Fe +++ , Ni ++ , H + ) of high-silica zeolite for the preparation of dewaxing catalysts leads to an increase in the thermo-oxidative stability of the desired product (see Table 2). Further increase in the stability of the target products based on the results of the acid number is achieved through the use in the dewaxing process of a catalyst containing a Ni-W hydrogenation system (see Example 3).
In addition to obtaining transformer oil, the proposed method is recommended for the production of hydraulic oils (example 6), diesel fuels (examples 4-5), aviation fuels (example 7). At the same time, the productivity of these processes by the proposed method exceeds by several times the productivity of processes by known methods [1, 2].
CLAIM
1. A process for producing low-hardening petroleum products by catalytic dewaxing of hydrocarbon distillates on a catalyst containing a high silica zeolite, a binder, hydrogenating components, additives that enhance the activity, selectivity, catalyst strength, characterized in that the process is carried out on a catalyst containing a mixed polyvalent and hydrogen form of high silica zeolite With a degree of exchange of Na + starting zeolite with a polyvalent cation or a mixture of polyvalent cations of at least 50 wt. % With a total degree of exchange of not less than 95% by weight and the process is carried out at the following conditions: temperature 260-380 ° C, pressure 4-5 MPa, volume feed rate 2-6 h -1 , ratio H 2 : feed 500: 1500.
print version
Date of publication 07.04.2007gg
Comments
When commenting on, remember that the content and tone of your message can hurt the feelings of real people, show respect and tolerance to your interlocutors even if you do not share their opinion, your behavior in the conditions of freedom of expression and anonymity provided by the Internet, changes Not only virtual, but also the real world. All comments are hidden from the index, spam is controlled.