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Modifying catalyst for naphtha processed maferial and method therefor

A technology for processing products and catalysts, which can be used in naphtha processing products upgrading catalysts and fields, and can solve problems such as complicated operations

Active Publication Date: 2006-08-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the addition of toluene to the reformed product in this method, the unreacted toluene in the product needs to be separated and recycled again, which makes the follow-up operation more complicated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0020] The preparation method of catalyst of the present invention comprises the steps:

[0021] (1) impregnating a hydrogen-type silica-alumina zeolite with a five-membered ring structure with a solution made of a phosphorus-containing compound, then drying and roasting the gained solid to obtain a phosphorus-modified zeolite,

[0022] (2) After mixing the silica-alumina zeolite with a five-membered ring structure modified by phosphorus and a binder, it is molded, dried and calcined to obtain a composite carrier,

[0023] (3) impregnating the composite support with a solution containing a VIII metal compound, then drying and calcining.

[0024] The step (1) in the method is to prepare phosphorus-modified zeolite. Phosphorus-modified zeolite is prepared from hydrogen-type zeolite, and hydrogen-type zeolite can be prepared from sodium-type zeolite by conventional ion exchange method. The exchange agent used mainly includes ammonium salt, dilute hydrochloric acid or dilute nitr...

example 1

[0037] Catalysts described in the present invention are prepared.

[0038] (1) Preparation of phosphorus-modified ZSM-5

[0039] SiO 2 / Al 2 o 3 NaZSM-5 with a molar ratio of 30 and a grain size of 1.6 μm was mixed with a 1.0 mol / L ammonium chloride solution at 70°C to make a liquid / solid ratio of 10 mL / g, and stirred thoroughly for 2 hours for ion exchange, It was then filtered and the solid was washed three times with deionized water. The above ammonium exchange was repeated three times, and the obtained ammonium ZSM-5 was dried at 120° C. for 8 hours and calcined at 550° C. for 6 hours to obtain HZSM-5.

[0040] Mix the above-mentioned hydrogen ZSM-5 with 1.14 mol / liter ammonium dihydrogen phosphate solution at a liquid / solid ratio of 2.5 ml / g, soak at 25°C for 3 hours, dry the obtained solid at 120°C for 8 hours, and roast at 550°C for 4 hours. hours, SiO 2 / Al 2 o 3 Phosphorus-modified ZSM-5 (PZSM-5) zeolite with a ratio of 30, PZSM-5 containing 0.8% by mass of ph...

example 2

[0044] Prepare catalyst B by the method for example 1, difference is the SiO of the ZSM-5 zeolite that uses in (1) step 2 / Al 2 o 3 The molar ratio is 130, and the composition of catalyst B is shown in Table 1.

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PUM

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Abstract

This invention relates to a modifying catalyst for processing naphtha products including VIII family metals and a compound carrier, in which, the content of VIII family metal is 0.01-5mass% corresponding to dry basis compound carrier, which includes 10-90mass% modified P SiAl zeolite with five-membered ring structure and 10-90% adhesive agent and P content is 0.1-5.0%.

Description

technical field [0001] The invention relates to a naphtha processing product upgrading catalyst, a preparation method and an application in upgrading. Specifically, it is a catalyst containing a hydrogenation metal and a five-membered ring structure zeolite and a method for upgrading naphtha processed products by using the catalyst. Background technique [0002] Catalytic reforming is one of the petroleum product processing techniques. Its process is to convert straight-run naphtha into high-octane gasoline or reformed products rich in aromatics through catalytic reaction, and at the same time produce rich and cheap hydrogen. In the catalytic reforming process, the naphtha raw material rich in paraffins and naphthenes is contacted with the platinum reforming catalyst under certain conditions, and the following reactions mainly occur: dehydrogenation of naphthenes into aromatics, paraffin dehydrogenation ring into aromatics, isomerization of paraffins and naphthenes, and hyd...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G35/095
Inventor 蔡迎春马爱增潘锦程周怡然刘辰
Owner CHINA PETROLEUM & CHEM CORP