Pd-Ag/Al2O3-TiO2 catalyst for selective hydrogenation of cracked gasoline or its fractions, and preparation method thereof

A technology for pyrolysis gasoline and catalysts, applied in the direction of metal/metal oxide/metal hydroxide catalysts, through selective hydrotreating, physical/chemical process catalysts, etc., which can solve the problems of catalyst stability and low deactivation rate and other problems, to achieve the effect of stable hydrogenation activity and good gel capacity

Active Publication Date: 2012-10-17
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
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Problems solved by technology

[0004] Chinese patent application publication CN1665588A discloses a palladium-silver hydrogenation catalyst and a preparation method thereof. The carrier material is selected from alumina, silicon dioxide, titania, zirconia, aluminosilicate, zinc titanate and mixtures thereof, and the carrier is preferably Alumina, the catalyst composition has a palladium content of about 0.01-0.6 wt%, a silver c...

Method used

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  • Pd-Ag/Al2O3-TiO2 catalyst for selective hydrogenation of cracked gasoline or its fractions, and preparation method thereof
  • Pd-Ag/Al2O3-TiO2 catalyst for selective hydrogenation of cracked gasoline or its fractions, and preparation method thereof
  • Pd-Ag/Al2O3-TiO2 catalyst for selective hydrogenation of cracked gasoline or its fractions, and preparation method thereof

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Embodiment 1

[0037] 1. Preparation of Vector

[0038] Take the specific surface area as 110 meters 2 88 g of clover-shaped alumina with a pore volume of 0.59 ml / g and a most probable pore diameter of 130 angstroms, impregnated with 0.557 g / ml dilute sulfuric acid solution of 65 ml of titanium sulfate, stirred for 15 minutes, and dried at 120°C After 8 hours, it was calcined at 900° C. for 4 hours to obtain a titanium oxide-alumina composite. The composite has a titanium oxide content of 11.87% by weight and a specific surface area of ​​87 m 2 / g, the pore volume is 0.53 ml / g, and the most probable pore diameter is 123 Angstroms.

[0039] 2. Preparation of catalyst semi-finished products

[0040] Get 100 grams of the titania-alumina composite prepared above, the concentration is Ag 2 O is calculated as 0.97 grams of Ag 2 110 ml of O / 100 ml silver oxalate aqueous solution was poured into the composite carrier, stirred for 20 minutes, allowed to stand for 1.5 hours, drained, and dried at...

Embodiment 2

[0044] Repeat Example 1, the difference is: with the concentration of Ag 2 O counted as 3.906 grams of Ag 2 110 milliliters of silver oxalate aqueous solution of 0 / 100ml is impregnated 96 grams of titania-alumina composite carrier, and use concentration is 85 milliliters of palladium chloride aqueous solution of 0.307 gram of palladium / 100ml to impregnate 90 grams of catalyst semi-finished products, make catalyst B1-2, The results are shown in Table 1.

Embodiment 3

[0046] Repeat Example 1, the difference is: with the concentration of Ag 2 O counts as 1.96 grams of Ag 2 110 milliliters of silver oxalate aqueous solution of 0 / 100ml impregnates 98 grams of titania-alumina composite carrier, and use concentration is 0.307 gram palladium / 100ml palladium chloride aqueous solution 85 milliliters impregnates 90 grams of catalyst semi-finished products, makes catalyst C1-2, The results are shown in Table 1.

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Abstract

The invention relates to a Pd-Ag/Al2O3-TiO2 catalyst for selective hydrogenation of cracked gasoline or its fractions. The catalyst comprises an Al2O3-TiO2 composite as a carrier, and active components of Pd and Ag loaded on the carrier, wherein the Pd content accounts for 0.15-0.5wt% of the total weight of the catalyst, and the Ag content accounts for 0.8-4.5wt% of the total weight of the catalyst. Compared with same catalysts, the catalyst for the hydrogenation of the cracked gasoline or its fractions of the invention has the advantages of high hydrogenation selectivity at a low temperature, strong As impurity resistance, large charging capacity and stable activity. In addition, the invention also relates to a preparation method of the catalyst. The catalyst of the invention can also be used for the selective hydrogenation of alkynes and/or diolefins of other petroleum hydrocarbons.

Description

technical field [0001] The invention relates to a palladium-silver / alumina-titania catalyst for selective hydrogenation of petroleum hydrocarbons, in particular to a palladium-silver / alumina-titania catalyst for selective hydrogenation of pyrolysis gasoline or its fractions. The invention also relates to a process for preparing said catalyst. Background technique [0002] pyrolysis gasoline C 5 -C 9 Distillate is a by-product of the ethylene industry. According to different cracking raw materials and cracking depths, its output accounts for more than 50% by weight of ethylene production capacity, and the content of aromatics accounts for 40-80% by weight, so it is the main source of aromatics. Cutting C on industrial production 8 and C 9 The distillate undergoes one-stage hydrogenation to remove highly unsaturated hydrocarbons, such as chain conjugated dienes, styrene, alkynes and cyclic conjugated dienes, and then undergoes two-stage hydrodesulfurization to remove monoe...

Claims

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Application Information

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IPC IPC(8): B01J23/50B01J35/10C10G45/00C10G45/40
Inventor 柴忠义杜周纪玉国季静任玉梅
Owner CHINA PETROLEUM & CHEM CORP
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