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Butane dehydrogenation catalyst and preparation method thereof

A butane dehydrogenation and catalyst technology, which is applied in the direction of molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of non-environmental protection, high price, activity and selectivity improvement, etc., and achieve improved mechanical strength And long-term operation stability, prevent damage and loss, improve the effect of activity and selectivity

Inactive Publication Date: 2013-12-18
SHANDONG KENLI PETROCHEM GRP
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Problems solved by technology

Cr 2 o 3 / Al 2 o 3 The system is characterized by high activity and good selectivity, but deactivation is fast, toxic, and does not meet the requirements of environmental protection, while Pt-Sn / Al 2 o 3 The advantage of the system is good stability, but the disadvantage is that the price is expensive, and the activity and selectivity still need to be improved

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  • Butane dehydrogenation catalyst and preparation method thereof

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Embodiment Construction

[0020] combined with figure 1 , further describe the present invention:

[0021] A butane dehydrogenation catalyst, consisting of the following materials by weight percentage:

[0022] Chromium trioxide: 12%~20%, potassium oxide: 1%~2%, vanadium pentoxide: 1%~2%, silicon dioxide: 1%~2%, molecular sieve: balance.

[0023] The preparation method of the present invention is:

[0024] (1) Preparation of Cr 2 o 3 and K 2 CO 3 After heating it to 30°C, slowly add it to the molecular sieve and stir evenly, heat the molecular sieve to 250°C under the action of N2 flow in the fluidized bed of the reactor, remove the impregnating liquid, and then cool to normal temperature;

[0025] (2) The molecular sieve in the fluidized state at room temperature in step (1) was uniformly dropped into Si(OC 2 h 5 ) 4 ethanol solution to fix the lattice of the active components in the molecular sieve;

[0026] (3) After adding the solution of step (2) and the molecular sieve is still in a...

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Abstract

The invention relates to a butane dehydrogenation catalyst and a preparation method thereof. The butane dehydrogenation catalyst comprises the following substances in percentage by weight: 12%-20% of chromic oxide, 1%-2% of potassium oxide, 1%-2% of vanadic oxide, 1%-2% of silicon dioxide and the balance of molecular sieves. The preparation method comprises the following process steps: (1) soaking, namely soaking the molecular sieves by using a solution which contains chromium compounds, potassium compounds and vanadium compounds, and drying a product; (2) lattice fixation, namely carrying out lattice fixation on the active components of the product dried from the step (1) by using a silicon compound solution; (3) product roasting, namely heating and roasting the product dried from the step (2) at a certain heating speed to till the temperature is 600 DEG C, and performing heat preservation for 1 hour. The preparation method disclosed by the invention can be used for preventing the active phase of the catalyst from being damaged and lost in a using process, and enhancing the mechanical strength and long-term operation stability of the catalyst.

Description

Technical field: [0001] The invention relates to a petrochemical technology, in particular to a butane dehydrogenation catalyst and a preparation method. Background technique: [0002] With the development of petrochemical technology, especially the huge demand for olefin resources in my country in recent years, the demand for butene (including 1-butene, 2-butene and isobutene) shows an increasing trend year by year. Butene is an important petrochemical resource second only to ethylene and propylene, mainly derived from the separation and chemical synthesis of C4 fractions. [0003] C4 fractions come from natural gas, refinery gas generated during petroleum refining, and cracked gas from hydrocarbon cracking in petrochemical production. The sources are different and the composition is different. The C4 fraction recovered from natural gas mainly contains C4 alkanes, while the latter two processes provide almost all C4 alkenes. For example, the C4 fraction of the catalyt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/00C07C11/08C07C11/09C07C5/333
Inventor 王全平姚秀伟王宗廷季其华宋爱民王发明隋红庆屈玉玺刁旺梅
Owner SHANDONG KENLI PETROCHEM GRP
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