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Paraffin hydrocarbon shape selective isomerization catalyst, preparation method and application thereof

A catalyst and a technology for paraffin hydrocarbons, which are applied in the field of paraffin hydrocarbon shape-selective isomerization catalysts and their preparation, can solve the problems of easy cracking, low activity and selectivity, weak catalyst acidity, etc., and achieve low pour point and product yield. High, high viscosity index effect

Active Publication Date: 2013-10-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above-mentioned materials have acid centers with moderate strength and pore structures that match wax molecules, and have obvious space restrictions on multi-branched isomers, they can all cause isomerization reactions of paraffins to a certain extent, but due to In the process of catalyst preparation, most of the acidic centers will be covered, and the obtained catalyst is weak in acidity, low in activity and selectivity. In addition, the stability of the catalyst is closely related to its acidity, and the catalyst with strong acidity is resistant to sulfur and nitrogen poisoning. Strong ability and good stability, but it is also more prone to side reactions such as cracking

Method used

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  • Paraffin hydrocarbon shape selective isomerization catalyst, preparation method and application thereof
  • Paraffin hydrocarbon shape selective isomerization catalyst, preparation method and application thereof

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preparation example Construction

[0023] Provide a kind of specific preparation method of catalyst of the present invention below, but not limited to this method, concrete steps are:

[0024] (1) loading the rare earth on the molecular sieve, drying and roasting to obtain the rare earth modified molecular sieve;

[0025] (2) loading the halogen on the inorganic refractory oxide, drying and roasting to obtain the halogen modified inorganic refractory oxide;

[0026] (3) Fully kneading rare earth modified molecular sieves, halogen modified inorganic refractory oxides, extrusion aids, water and peptizing agent into a plastic paste, extrusion molding, drying and roasting to obtain the catalyst carrier of the present invention.

[0027] (4) The active metal-containing component is loaded on the carrier by a conventional impregnation method, and then dried and calcined to obtain the paraffin hydrocarbon shape-selective isomerization catalyst of the present invention.

[0028] The rare earth described in step (1) ca...

Embodiment 1

[0039] The preparation of the comparative catalyst E-1 of the present invention.

[0040] (1) Preparation of ZSM-22 molecular sieve

[0041] ZSM-22 used in the present invention is prepared according to the method of Chinese Patent CN1565969A Example 1, and the obtained molecular sieve has a silicon-aluminum molar ratio of 92 and a specific surface area of ​​223m 2 / g, pore volume 0.21mL / g.

[0042] The zeolite synthesized above contains alkali metal or alkaline earth metal cations, which are exchanged with ammonium cations, and then roasted in the air at 316°C to 540°C for 1 to 10 hours, and the obtained acidic molecular sieve is numbered S-1, which forms acidic zeolite are well known in the art.

[0043] (2) getting 1000 grams of mass concentration as lanthanum nitrate solution of 20% (calculated as lanthanum oxide) and 800 grams of S-1 molecular sieves is fully mixed, then dried at 130°C for 24 hours, and roasted at 750°C for 3 hours, A modified S-1 molecular sieve with ...

Embodiment 2

[0048] The preparation of catalyst E-2 of the present invention

[0049] The preparation process of the catalyst E-2 of the present invention is the same as in Example 1, except that cerium nitrate is used to replace lanthanum nitrate, and the prepared catalyst of the present invention is numbered E-2, its physicochemical properties are shown in Table 3, and the reaction results are shown in Table 4 .

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Abstract

The invention discloses a paraffin hydrocarbon shape selective isomerization catalyst, a preparation method and application thereof. The catalyst comprises a rare earth-modified molecular sieve and a halogen-modified inorganic melting-resisting oxide and at least one VIII-family precious metal, wherein the molecular sieve is a TON type molecular sieve, the weight ratio of the rare earth-modified molecular sieve to the halogen-modified inorganic melting-resisting oxide is 10:90-90:10, in the catalyst, the content of the VIII-family precious metal is 0.1-10 percent by weight, in the rare earth-modified molecular sieve, the mass content of the rare earth oxide is 0.5-60.0 percent, and in the halogen-modified inorganic melting-resisting oxide, the mass content of the halogen is 0.1-20.0 percent. Compared with the prior art, the catalyst is especially suitable for a hydroprocessing process of lubricating oil distillate, and has the characteristics of high yield of a target product, low flow point and high viscosity index.

Description

technical field [0001] The invention relates to a paraffin hydrocarbon shape-selective isomerization catalyst and its preparation method and application. Specifically, it relates to a waxy raw material oil isomerization dewaxing catalyst and its preparation method and application, especially suitable for the hydroisomerization dewaxing process of lubricating oil. Background technique [0002] The waxy feed oil mentioned in the present invention mainly includes diesel oil, AGO, VGO, white oil, hydrocracking tail oil and lubricating oil fractions, etc. Waxy raw oils, especially heavy distillate oils derived from paraffin-based crude oils, contain more waxes, have higher freezing points, and poor low-temperature fluidity. During storage, transportation, and use, the oil will Thickening, even solidification, thereby blocking the oil pipeline and interrupting the oil supply to the engine to cause engine failure. At present, there are many methods to solve various problems cause...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/74C10G45/64C10M177/00
Inventor 徐会青刘全杰贾立明张喜文王伟
Owner CHINA PETROLEUM & CHEM CORP
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