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Paraffin hydrofining catalyst and preparation method thereof

A hydrorefining and catalyst technology, applied in catalyst activation/preparation, petroleum wax refining, molecular sieve catalysts, etc., can solve the problems of high concentration, low utilization rate of active metals, and no increase in the dispersion of active metal nickel, and achieve utilization rate High, high dispersion, good activity effect

Inactive Publication Date: 2020-05-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The concentration of the mixed solution of molybdenum, nickel and phosphorus used in the preparation of this method is high, especially the mass concentration of molybdenum. In addition, this method cannot reduce the distribution of the active metal at the small pores of the catalyst and does not improve the dispersion of the active metal nickel, so that the active metal low utilization

Method used

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  • Paraffin hydrofining catalyst and preparation method thereof
  • Paraffin hydrofining catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Weigh 500g of pseudo-boehmite and 40g of montmorillonite, mix well;

[0039] (2) Weigh 5g hydrogen-type Y-type molecular sieve (SiO 2 / Al 2 o 3 The molar ratio is 5.2), added to 400g deionized water, mixed and beaten;

[0040] (3) Add the slurry obtained in step (2) to the mixture obtained in step (1), add 10g of turnip powder, 20g of methylcellulose, 15g of acetic acid, add an appropriate amount of deionized water, and knead at room temperature to form. After forming, dry at 120°C for 4 hours, and bake at 600°C for 4 hours. The specific surface area of ​​the carrier after calcination is 372m 2 / g, the pore volume is 0.96 mL / g, and the average pore diameter is 15nm;

[0041] (4) Weigh 100 g of the catalyst carrier prepared in step (3), impregnate it with 200 mL of 1.00% disodium hydrogen phosphate solution at 60°C for 3 hours, filter off the excess solution, and drop the temperature at a rate of 0.3°C / min. After reaching -40°C, freeze-dry for 5 hours;

[0042...

Embodiment 2

[0044] Others are the same as in Example 1, except that in step (1), 60 g of montmorillonite is weighed and mixed with pseudo-boehmite to obtain catalyst B for paraffin hydrotreating.

Embodiment 3

[0046] Others are the same as in Example 1, except that in step (2), 10 g of hydrogen-type Y-type molecular sieves are weighed and added to 400 g of deionized water, mixed and beaten to obtain paraffin hydrorefining catalyst C.

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Abstract

The invention discloses a paraffin hydrofining catalyst and a preparation method thereof. The method comprises the following steps: (1) uniformly mixing pseudo-boehmite and layered clay; (2) mixing aY-type molecular sieve with water, and pulping to obtain a uniformly dispersed slurry; (3) adding the slurry obtained in the step (2) into a mixture obtained in the step (1), mixing, kneading, molding, drying and roasting to obtain a carrier; (4) impregnating the catalyst carrier obtained in the step (3) with a phosphorus-containing solution, and then drying; and (5) impregnating the carrier driedin the step (4) with an active metal solution containing a carboxyl-containing polymer, and then drying and roasting to obtain the paraffin hydrofining catalyst. The paraffin hydrofining catalyst prepared by the method is high in active metal utilization rate, high in active metal dispersity and high in activity.

Description

technical field [0001] The invention relates to a preparation method of a catalyst, in particular to a paraffin hydrorefining catalyst and a preparation method thereof. Background technique [0002] Paraffin wax is mainly composed of n-alkane, which is solid at room temperature, with a relatively large average molecular weight, generally between 300 and 500, and a carbon number of C20 to C30. Hydrofining of paraffin wax is mainly that the raw material wax is mixed with a certain proportion of hydrogen gas into the reactor at a certain temperature. h 2 S, NH 3 、H 2 O and other by-products to remove impurities. Regarding paraffin hydrorefining catalysts, molybdenum is generally used as the main metal component, and tungsten is also used as the main metal component. Hydrotreating catalysts employ secondary metal components such as nickel or cobalt in addition to the primary metal component. [0003] The raw material cost of active metals in paraffin hydrorefining catalyst...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/16B01J37/02B01J37/08B01J35/10C10G73/44
CPCB01J29/166B01J37/0201B01J37/082C10G73/44B01J35/615B01J35/638B01J35/635B01J35/647
Inventor 袁胜华刘文洁张皓段日张艳侠
Owner CHINA PETROLEUM & CHEM CORP
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