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N-alkane low-temperature isomerization catalyst as well as preparation method and application thereof

A low-temperature isomerization and normal paraffin technology, which can be used in isomerization to produce hydrocarbons, catalysts for physical/chemical processes, chemical instruments and methods, etc., and can solve the problems of low utilization rate of effective Cl and inability to ensure uniform distribution of Cl. , to achieve the effect of improving activity and stability, increasing effective active specific surface area, and improving isomerization activity

Active Publication Date: 2015-11-25
BEIJING SINO SPHERE PETROCHEM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the Cl in the catalyst is added during extruding. After roasting, it cannot ensure that Cl is evenly distributed on the surface of the catalyst, and the utilization rate of effective Cl is low.

Method used

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  • N-alkane low-temperature isomerization catalyst as well as preparation method and application thereof
  • N-alkane low-temperature isomerization catalyst as well as preparation method and application thereof
  • N-alkane low-temperature isomerization catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Get 20 parts by weight of chloroplatinic acid, impregnate it into γ-Al of 100 parts by weight 2 o 3 On the carrier, γ-Al 2 o 3 The specific surface area of ​​the carrier is 220m 2 / g, the pore volume is 0.55ml / g, and then the impregnated product is placed in an oven at 100°C for drying treatment for 2h, and then placed in a muffle furnace at 500°C for 5h.

[0030] The obtained product is reduced by hydrogen, the reduction temperature in the reactor is 250°C, the hydrogen pressure is 2MPa, and the reduction time is 2h; then the hydrogen pressure is kept at 0.1MPa, and the reaction temperature is lowered to 20°C to obtain Catalyst to be chlorinated.

[0031] AlCl 3 Dissolved in ethyl acetate solvent, where AlCl 3 The Cl concentration is 18% of the solution mass. Under the condition that the temperature is 20°C, the catalyst is chlorinated in liquid phase on the reaction device, chlorinated at normal pressure for 15 hours, and the volume space velocity is 2 hours. -...

Embodiment 2

[0038] Get 30 parts by weight of chloroplatinic acid and impregnate it into 80 parts by weight of γ-Al 2 o 3 On the carrier, γ-Al 2 o 3 The specific surface area of ​​the carrier is 200m 2 / g, the pore volume is 0.60ml / g, and then the impregnated product is dried in an oven at 100°C for 4h, and then baked in a muffle furnace at 600°C for 2h.

[0039] The obtained product is reduced by hydrogen, the reduction temperature in the reactor is 450°C, the hydrogen pressure is 1MPa, and the reduction time is 3h; then the hydrogen pressure is kept at 0.1MPa, and the reaction temperature is lowered to 30°C to obtain Catalyst to be chlorinated.

[0040] AlCl 3 Dissolved in a mixed solvent of ethyl acetate and chloroform (4:1), where AlCl 3 The concentration of Cl is 16% of the solution mass. Under the condition that the temperature is 30°C, the catalyst is chlorinated in liquid phase on the reaction device, chlorinated at normal pressure for 15h, and the volume space velocity is 1....

Embodiment 3

[0047] Get 25 parts by weight of chloroplatinic acid, impregnate it into γ-Al of 120 parts by weight 2 o 3 On the carrier, γ-Al 2 o 3 The specific surface area of ​​the carrier is 240m 2 / g, the pore volume is 0.75ml / g, and then the impregnated product is dried in an oven at 110°C for 4h, and then baked in a muffle furnace at 700°C for 3h.

[0048] The obtained product is reduced by hydrogen, the reduction temperature in the reactor is 250°C, the hydrogen pressure is 3MPa, and the reduction time is 4h; then the hydrogen pressure is kept at 0.5MPa, and the reaction temperature is lowered to 25°C to obtain Catalyst to be chlorinated.

[0049] AlCl 3 Dissolved in a mixed solvent of ethyl acetate and chloroform (3:1), where AlCl 3 The Cl concentration is 15% of the solution mass. Under the condition that the temperature is 25°C, the catalyst is chlorinated in liquid phase on the reaction device, chlorinated at normal pressure for 15 hours, and the volume space velocity is 2 ...

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Abstract

The invention discloses an n-alkane low-temperature isomerization catalyst as well as a preparation method and an application of the n-alkane low-temperature isomerization catalyst. The catalyst disclosed by the invention comprises the following components in percentage by weight: 0.1%-1.0% of loaded metal Pt, 5.0%-10.0% of an element Cl, and the balance of a carrier gamma-Al2O3. The preparation method of the catalyst disclosed by the invention comprises the following steps: dipping chloroplatinic acid on the carrier gamma-Al2O3, and then drying and roasting to obtain Pt / gamma-Al2O3 catalyst containing 0.1%-1% of the Pt; and firstly reducing a platinum-containing catalyst, then uniformly dipping a chlorinating agent on the surface of the Pt / gamma-Al2O3 catalyst by adopting a chlorinating way of liquid-phase dipping, and then carrying out programmed warming for curing the chlorinating agent to obtain the Pt / gamma-Al2O3-Cl n-alkane isomerization catalyst with high chloride loading quantity (5%) and uniform distribution of the chlorine element. The catalyst provided by the invention has relatively high chlorine content, also has good chlorine distribution, and achieves high acidity loading quantity, high isomerization activity and high stability of the catalyst.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a catalyst for low-temperature isomerization of normal alkanes, a preparation method and application thereof. Background technique [0002] In recent years, with the rapid development of my country's automobile industry and increasingly stringent environmental protection requirements, the standards for gasoline and diesel have been gradually upgraded. Therefore, the production of clean high-octane gasoline is a top priority for refineries. Clean gasoline has the characteristics of low aromatics, high octane number, low vapor pressure, lead-free and high oxygen content, which is conducive to reducing environmental pollution and improving the safety performance of automobiles. The following methods are generally used to increase the octane value of gasoline: (1) increasing the content of aromatics and olefins in gasoline; (2) adding acid compounds; (3) alkylating gasoline; (4) is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/13C07C5/27C07C9/18C07C9/16
Inventor 李宇实
Owner BEIJING SINO SPHERE PETROCHEM TECH CO LTD
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