Selective hydrogenation catalyst for pyrolysis gasoline

A pyrolysis gasoline, selective technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, hydrocarbon oil cracking, etc., can solve the unmentioned anti-interference, gel capacity and water resistance Sex and other issues, to achieve good anti-interference, good technical effect, good low-temperature activity effect

Active Publication Date: 2008-02-13
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0004] Chinese patent CN1184289C discloses a catalyst for the selective hydrogenation of pyrolysis gasoline and its preparation method and application, including a titanium oxide-alumina composite as a carrier, and the active component metal palladium loaded on the composite carrier, wherein the metal The content of pa

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Take by weighing 300 grams of pseudo-boehmite, 150 grams of α-alumina, 9 grams of scallop powder, mix, then add 25 grams of polyvinyl alcohol solution (mass concentration is 5%), 4.0 grams of nitric acid, concentration is 85% 1.8 grams of phosphoric acid, 1.5 grams of potassium nitrate, 360 milliliters of aqueous solution of 2 grams of magnesium nitrate, extruded into a clover of φ 2.5 mm, dried at 50 ° C for 24 hours and then roasted at 1000 ° C for 4 hours to obtain an improved compound pore structure. permanent alumina carrier Z1. The carrier was presoaked with deionized water, then drained, and the carrier was soaked in excess PdCl 2 Immerse in the impregnating liquid until the impregnating liquid is colorless, drain, dry at 120°C for 4 hours, and roast at 450°C for 4 hours to obtain Pd-based catalyst C1, so that the final Pd content is 0.3% of the weight of the carrier alumina. The catalyst composition, specific surface area, pore volume, and pore distribution are...

Embodiment 2

[0017] A modified alumina carrier Z2 with a composite pore structure was used, and the preparation method of the carrier was the same as in Example 1. The composition of the carrier is shown in Table 1. The Pd-based catalyst C2 was prepared with the same operation steps and conditions as in Example 1, so that the final Pd content was 0.5% by weight of the carrier alumina. The catalyst composition, specific surface area, pore volume, and pore distribution are shown in Table 1, and the content of each component is based on the weight of the carrier alumina.

Embodiment 3

[0019] A modified alumina carrier Z3 with a composite pore structure was used, and the preparation method of the carrier was the same as in Example 1. The composition of the carrier is shown in Table 1. The Pd-based catalyst C3 was prepared with the same operation steps and conditions as in Example 1, so that the final Pd content was 0.15% by weight of the carrier alumina. The catalyst composition, specific surface area, pore volume, and pore distribution are shown in Table 1, and the content of each component is based on the weight of the carrier alumina.

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Abstract

The present invention relates to a selective hydrogenation catalyst of pyrolysis gasoline which mainly solves the technical problem in the prior art that the selective hydrogenation catalyst of pyrolysis gasoline which has a high activity in low temperature, a strong anti-interference ability, a high glue capacity, the good stability and well resistant ability towards free water is difficult to prepare. The present invention solves the problem well by a technical proposal which includes that (a) 0.01 percent to 0.5 percent of active component of palladium or an oxide of the palladium; (b) 0.01 percent to 2.0 percent of at least one element which is selected from IA or II A in an element periodic table or the oxide of the element; (c) 0.01 percent to 20.0 percent of at least one element which is selected from IVA or VA in the element periodic table or the oxide of the element; (d) an alumina carrier, which are accounted by a weight proportion of the alumina carrier, and in which, a specific surface of the alumina carrier is 40 square meters per gram to 160 square meters per gram; a total pore volume is 0.3ml/g to 1.2ml/g; the pore volume that a pore diameter of which is less than 30nm is 5 percent to 60 percent of the total pore volume; the pore volume that the pore diameter of which is between 30nm to 60nm is 20 percent to 75 percent of the total pore volume; the pore volume that the pore diameter of which is more than 60nm is 20 percent to 60 percent of the total pore volume. The present invention can be used for the industrial production of the selective hydrogenation of pyrolysis gasoline.

Description

technical field [0001] The present invention relates to a kind of catalyst that is used for the selective hydrogenation of pyrolysis gasoline, especially about a kind of catalyst that is used for C 5 Hydrocarbons ~ hydrocarbon compounds with a dry point of 204°C, whole fraction pyrolysis gasoline or C 6 ~C 8 Catalyst for hydrogenation of pyrolysis gasoline of middle distillates of hydrocarbon compounds. Background technique [0002] Utilization of pyrolysis gasoline in ethylene plant is one of the main ways to improve the comprehensive economic benefits of the plant. Due to the complex composition and poor thermal stability of pyrolysis gasoline, it is usually used for the extraction of aromatics after the first stage of selective hydrogenation to remove dienes and styrene, and the second stage of hydrodesulfurization. At present, the catalysts for selective hydrogenation of pyrolysis gasoline in industry are mainly Pd-based or Ni-based catalysts, and the middle distillat...

Claims

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Application Information

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IPC IPC(8): B01J27/185B01J23/44B01J21/04C10G47/02C10G47/14
Inventor 谢在库刘仲能侯闽渤江兴华吴晓玲
Owner CHINA PETROLEUM & CHEM CORP
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