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Light hydrocarbon modified catalyst and preparation method thereof

A catalyst and modification technology, applied in the direction of molecular sieve catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem of catalyst activity, stability, limited increase in selectivity, no effective treatment of active components, and modification processes High cost and other issues, to achieve the effect of more regeneration times, good performance and improved strength

Inactive Publication Date: 2013-04-24
SHANDONG JINCHENG PETROCHEMICAL GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantages are: the cost of modification process with compounds of VA group elements antimony, bismuth, and tungsten is relatively high, and the modification method is single
Its shortcomings are: after the catalyst is formed (in the shape of a small ball), the mixed modification process of ZnO, rare earth and VA group elements is used, the process is complicated, the operation is difficult, and the cost is high
Its shortcoming is that the aluminum phosphate modification process obtained by impregnating the composite carrier does not effectively treat the active components, and the activity, stability and selectivity of the entire catalyst are limited.

Method used

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  • Light hydrocarbon modified catalyst and preparation method thereof
  • Light hydrocarbon modified catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Take 2.0kg of hydrogen-type ZSM-5 series zeolite molecular sieve with a silicon-aluminum ratio of 50, 0.65kg of pseudoboehmite, and 0.13kg of starch, mix and stir for 20 minutes, take 90ml of 56% nitric acid solution and 820ml of demineralized water to prepare nitric acid aqueous solution, and then added to the mixed material and stirred for 110min. Put the mixed material on the φ2mm-φ3mm template with the extruder to extrude. Dry in batches at a constant temperature of 100°C-120°C for 2-5h, and bake at a constant temperature of 500-600°C for 3-7h. Immerse the catalyst in PO 4 3- In the solution with a content of 40%, let it stand for 3-8 hours, then dry and roast to obtain catalyst A. The crushing strength and pilot test data of catalyst A are shown in Table 1 and Table 2.

Embodiment 2

[0037] Take 2.0kg of hydrogen-type ZSM-5 series zeolite molecular sieve with a silicon-aluminum ratio of 38, 0.58kg of pseudoboehmite, and 0.12kg of activated carbon micropowder, mix and stir for 20 minutes, and mix 250ml of 56% nitric acid solution with 750ml of demineralized water to prepare Aqueous nitric acid solution was then added to the mixture and stirred for 110 minutes. Operation steps are obtained catalyst B with example 1. The crushing strength and pilot test data of Catalyst B are shown in Table 1 and Table 2.

Embodiment 3

[0039] Catalyst C was prepared according to the method in Example 1, except that 2.0 Kg of ZSP-3 series molecular sieve, 0.49 Kg of pseudoboehmite, and 0.1 Kg of starch were mixed and stirred for 30 minutes. The crushing strength and pilot test data of Catalyst C are shown in Table 1 and Table 2.

[0040] Table 1 self-made catalyst and market catalyst crushing strength N) comparison table

[0041]

[0042] Table 2 Comparison table of pilot octane number of self-made catalyst and market catalyst

[0043]

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Abstract

The invention relates to a light hydrocarbon aromatized catalyst and a preparation method thereof, in particular to a light hydrocarbon modified catalyst and a preparation method thereof. The preparation method comprises: mixing a carrier, a bonding agent, a pore-enlarging agent and diluted nitric acid agent, extruding the mixture to form strips, drying, roasting to make dry rubber strips, and loading an active component by using an impregnation process. The preparation method is characterized in that: the carrier may be a hydrogen type ZSM-5 (zeolite sieve of molecular porosity 5) zeolite molecular sieve, a ZSP-3(zeolite sieve of porosity 3) molecular sieve or mixed molecular sieve; the bonding agent is pseudoboehmite; and after being passivated, the catalyst is modified by solution containing PO4<3-> in a mode of impregnation. In the invention, the modification is implemented by using a phosphorus element, so the carbon accumulated on the surface of the catalyst is reduced; a modification process is simple in operation and practical, can allow the catalyst and a modifying component to fully and effectively combine, so the modification is actually realized; various indexes such as activity and selectivity of the catalyst can be determined by testing the phosphorus content; and the catalyst prepared by the method has high activity, high selectivity and long single-circle service life, and can be regenerated for more times, reduce carbon accumulation and increase oil product yield obviously.

Description

technical field [0001] The invention relates to a light hydrocarbon aromatization catalyst and a preparation method thereof, in particular to a light hydrocarbon upgrading catalyst and a preparation method thereof. Background technique [0002] With the further development of petrochemical technology and the country's further requirements on exhaust emissions, there are new regulations on gasoline quality. The country has successively promulgated new gasoline standards to promote the progress of energy conservation and emission reduction. Compared with the current National II standard, the National III standard has been improved a lot. In the new standard, the sulfur content in gasoline is reduced from 500ppm to below 150ppm, which puts forward higher requirements for gasoline octane number. [0003] At present, the utilization of light hydrocarbons in my country's petroleum processing plants is still low, and many light hydrocarbon components are included in liquefied gas,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/80B01J29/70B01J29/40C10G45/68
Inventor 郭秀学杨传水孙农三韩刚己周克伟姚若纳李拥军
Owner SHANDONG JINCHENG PETROCHEMICAL GRP CO LTD