Coal tar hydrogenation catalyst, and preparation method and application thereof
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A hydrogenation catalyst, catalyst technology, applied in chemical instruments and methods, organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, etc. Beneficial to the hydrogenation reaction, avoiding the effect of agglomeration or decomposition
Active Publication Date: 2015-05-06
CHINA PETROLEUM & CHEM CORP +1
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The particle size of the catalyst in this patent is too small, suitable for the suspension bed hydrogenation process, not suitable for ebullating bed hydrogenation
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Embodiment 1
[0039] Weigh 1000g of ferric oxyhydroxide filter cake prepared by wet air oxidation method, which contains 400g of ferric oxyhydroxide, add 80g of citric acid dissolved in 1L of water to it and stir to make it evenly mixed, the modification treatment time is 1h, and the treated slurry is use.
[0040] Preparation of sodium metaaluminate solution concentration is 50gAl 2 o 3 / L, a total of 1L, heated to 75°C for use, the concentration of aluminum sulfate solution is 20gAl 2 o 3 / L for a total of 2L, heated to 75°C for use.
[0041] Add 1.0L of distilled water into the gel tank and heat to 75°C. Weigh 500g macroporous alumina (specific surface area 220m 2 / g, pore volume 0.92mL / g, average pore diameter 17nm) and 100g Y-type molecular sieve (SiO 2 / Al 2 o 3 =11.5), add it into the gelling tank and stir evenly, and then add sodium metaaluminate solution and aluminum sulfate solution, the gelling temperature is kept at 75°C, and the pH value is kept at 7.5. After gelling, ...
Embodiment 2
[0044] Other conditions are with embodiment 1, just change citric acid addition into 140g, Y type molecular sieve (SiO 2 / Al 2 o 3 =11.5) was changed to 70g, the treatment time was 2h, the gelling temperature was 85°C, the pH value of gelling was 8.0, the aging temperature was 150°C, and the aging time was 6h, and the catalyst B-2 was prepared.
Embodiment 3
[0046] Other conditions are the same as in Example 1, but the preparation of sodium metaaluminate solution concentration is 60gAl 2 o 3 / L totals 2L, the concentration of aluminum sulfate solution is 20gAl 2 o 3 / L is 4L in total, the bottom water in the gel-forming tank is 3L, and 800g of alumina is added to prepare catalyst B-3.
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Abstract
The invention discloses a coal tar hydrogenation catalyst, and a preparation method and application thereof. The catalyst comprises iron oxyhydroxide, organic polybasic carboxylic acid, macroporous alumina, a molecular sieve and pseudo-boehmite. The preparation method comprises the following steps: adding organic polybasic carboxylic acid into an iron oxyhydroxide filter cake and carrying out beating to obtain slurry; preparing aluminum hydroxide colloid, wherein the macroporous alumina and the molecular sieve are added before, during or after preparation of the aluminum hydroxide colloid so as to obtain the aluminum hydroxide colloid containing the macroporous alumina and the molecular sieve; adding the iron oxyhydroxide slurry before ageing of the aluminum hydroxide colloid; then carrying out filtering, washing, drying and molding; and carrying out drying so as to obtain the coal tar hydrogenation catalyst. The method provided by the invention adopts cheap iron oxyhydroxide as an active metal component, so cost is low. The catalyst prepared in the invention is especially applicable as a fluidized bed coal tar hydrogenation catalyst and has high hydrogenation activity, proper cracking activity and good stability.
Description
technical field [0001] The invention relates to a coal tar hydrogenation catalyst and a preparation method thereof, which is particularly suitable for the fluidized bed hydrocracking process of coal tar. Background technique [0002] Coal tar is an important by-product of coal pyrolysis and carbonization process. It is a complex mixture of various substances. According to the temperature and process method of coal pyrolysis and carbonization, coal tar can be divided into low-temperature coal tar and high-temperature coal tar. [0003] Compared with petroleum heavy fractions, coal tar raw materials have the characteristics of high content of heteroatoms such as sulfur and nitrogen, high ash content, high content of polycyclic aromatic hydrocarbons, and high content of colloids and asphaltenes. Therefore, direct combustion will produce a large amount of sulfide and nitride, causing serious environmental pollution. Clean processing and effective utilization of coal tar become...
Claims
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