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Catalyst for reducing olefin content in mixed material of liquified gas and gasoline

A technology of mixing raw materials and catalysts, which is applied in the petroleum industry, refining hydrocarbon oil, etc., and can solve problems affecting the production of liquefied gas LPG for vehicles

Inactive Publication Date: 2007-08-22
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] On the other hand, the implementation of my country's "West-to-East Gas Pipeline" plan and the civilian natural gas pipeline project has caused a further backlog of excess liquefied gas, and it is urgent to find a way out, especially the amount of carbon tetraolefins contained in it is less than 50%. And the presence of high content of olefins in the refinery liquefied gas affects the production of vehicle liquefied gas LPG (the QJ / DSH712-1999 standard for vehicle liquefied gas LPG requires that the olefin content is less than 5%)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A certain amount of rare earth-70 wt% ZSM5 / 30 wt% ZSM11 co-crystallized molecular sieve (rare earth content accounts for 1.2 wt% of rare earth-70 wt% ZSM5 / 30 wt% ZSM11 co-crystallized molecular sieve), alumina and deionized water are mixed evenly Afterwards, extrusion molding, drying, roasting and steam treatment, prepared catalyst B, wherein the roasting temperature was 550° C. for 4 hours, and the water treatment condition was 100% steam at 500° C. for 2 hours. In the prepared catalyst B, the rare earth-70% by weight ZSM5 / 30% by weight ZSM11 co-crystallized molecular sieve accounts for 50% of the weight of the catalyst.

Embodiment 2

[0031]A certain amount of rare earth-50 wt% ZSM5 / 50 wt% ZSM11 co-crystallized molecular sieve (rare earth content accounts for 5.2 wt% of rare earth-50 wt% ZSM5 / 50 wt% ZSM11 co-crystallized molecular sieve), aluminum oxide and deionized water are mixed evenly Afterwards, extrusion molding, drying, roasting and steam treatment, prepared catalyst C, wherein the roasting temperature was 500°C for 5 hours, and the water treatment conditions were 100% steam at 400°C for 8 hours. In the prepared catalyst C, the rare earth-70% by weight ZSM5 / 30% by weight ZSM11 co-crystal molecular sieve has a weight content of 30% in the catalyst.

Embodiment 3

[0033] A certain amount of rare earth-10 wt% ZSM5 / 90 wt% ZSM11 co-crystallized molecular sieve (rare earth content accounts for 3.2 wt% of rare earth-10 wt% ZSM5 / 90 wt% ZSM11 co-crystallized molecular sieve), aluminum oxide and deionized water are mixed evenly Afterwards, extrusion molding, drying, roasting and steam treatment, prepared catalyst D, wherein the roasting temperature was 580°C for 2 hours, and the water treatment conditions were 100% steam at 580°C for 4 hours. In the prepared catalyst D, the rare earth-70% by weight ZSM5 / 30% by weight ZSM11 co-crystal molecular sieve has a weight content of 70% in the catalyst.

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Abstract

The catalyst for reducing olefin content in mixed material of liquefied gas and gasoline includes cocrystallized RE-ZSM5 / ZSM11 molecular sieve as the active component in 25-75 wt% and alumina matrix for the rest. Its preparation process includes the following steps: 1. adding the aluminum source, inorganic acid, RE salt, water glass and deionized water successively into the reactor under stirring to synthesize the active component cocrystallized RE-ZSM5 / ZSM11 molecular sieve; and 2. mixing the cocrystallized RE-ZSM5 / ZSM11 molecular sieve with alumina and water, extruding the mixture into strip, drying at 60-120 deg.c for 2-4 hr, roasting in air atmosphere at 500-600 deg.c for 4-6 hr, and curing in 100 % water vapor at 400-600 deg.c for 2-10 hr to obtain the catalyst. The catalyst of the present invention has the capacity of obviously lowering olefin content in mixed material of liquefied gas and gasoline and raising the arene content.

Description

technical field [0001] The invention relates to a catalytic conversion technology of petroleum hydrocarbons, in particular to a fixed-bed catalyst for reducing the olefin content of gasoline and liquefied gas mixed raw materials through aromatization. [0002] The present invention also relates to a method for preparing the above-mentioned catalyst. [0003] The invention also relates to the use of the catalysts described above. Background technique [0004] With the continuous improvement of gasoline and diesel standards around the world, people have more and more strict requirements on the quality of gasoline for vehicles. In 2003, the gasoline standards implemented in major cities in my country: sulfur content is not more than 0.08%, olefin content is not more than 35%, benzene content Not more than 2.5%, the content of aromatics is not more than 40%, and in 2005, the content of olefins in gasoline will be further reduced to less than 20%. Foreign gasoline is mainly cata...

Claims

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Application Information

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IPC IPC(8): C10G45/68
Inventor 刘盛林安杰徐龙伢王清遐谢素娟
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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