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Selective ring-opening catalyst and preparation method thereof

A selectivity and catalyst technology, applied in the direction of molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of low yield of single-ring aromatics, fast catalyst deactivation rate, poor ring-opening selectivity of polycyclic aromatics, etc. problems, to achieve the effects of delaying the inactivation rate, improving the ring-opening efficiency, and inhibiting agglomeration

Active Publication Date: 2019-07-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] One of the technical problems to be solved by the present invention is to provide a new polycyclic aromatic hydrocarbon selection method to overcome the problems of poor ring-opening selectivity of polycyclic aromatic hydrocarbons, low yield of single-ring aromatic hydrocarbons and fast catalyst deactivation rate in the prior art. Sexual Ring Opening Catalyst

Method used

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  • Selective ring-opening catalyst and preparation method thereof
  • Selective ring-opening catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Add 70g large-pore pseudo-boehmite (commercially available) on a dry basis and 30g small-pore pseudo-boehmite (commercially available) on a dry basis into a mixer until uniform, then add 3g of scallop powder, 5g of volume ratio 1:1HNO 3 solution and 45g deionized water, grind evenly to make a dough suitable for extrusion. It is extruded through a die and is in the shape of a slender cylinder (diameter 1.7mm). After drying at 120°C, it is baked at 550°C for 4 hours, and then it is cut into carrier particles (1.7×4.0mm) of uniform size for use.

[0037] Prepare chloroiridic acid and barium nitrate in proportion to impregnate the carrier particles at 40°C. The dry basis weight of the carrier contained in the impregnating solution is 1% Ir and 3% Ba. After aging for 8 hours and drying, the Oxidation at 350°C in air for 4h, and reduction in hydrogen at 300°C for 4h (this step can be done in a reactor) to obtain the finished catalyst 1.

[0038] Catalyst 1 was used in a fix...

Embodiment 2

[0040]Add 70g of amorphous silica-alumina (commercially available) on a dry basis and 30g of small-pore pseudo-boehmite (commercially available) on a dry basis into a mixer until they are uniform, then add 3g of turnip powder and 5g of HNO at a volume ratio of 1:1 to the mixture. 3 solution and 45g deionized water, grind evenly to make a dough suitable for extrusion. It is extruded through a die and is in the shape of a slender cylinder (diameter 1.7mm). After drying at 120°C, it is baked at 550°C for 4 hours, and then it is cut into carrier particles (1.7×4.0mm) of uniform size for use.

[0041] Prepare chloroiridic acid and barium nitrate in proportion to impregnate the carrier particles at 40°C. The dry basis weight of the carrier contained in the impregnating solution is 1% Ir and 3% Ba. After aging for 8 hours and drying, the Oxidation at 350°C in air for 4h, and reduction in hydrogen at 300°C for 4h (this step can be completed in a reactor) to obtain the finished catalys...

Embodiment 3

[0044] Add 70g USY (commercially purchased) on a dry basis and 30g small-pore pseudo-boehmite (commercially purchased) on a dry basis into the mixer until uniform, then add 3g of kale powder, 5g of HNO at a volume ratio of 1:1 to the mixture 3 solution and 45g deionized water, grind evenly to make a dough suitable for extrusion. It is extruded through a die and is in the shape of a slender cylinder (diameter 1.7mm). After drying at 120°C, it is baked at 550°C for 4 hours, and then it is cut into carrier particles (1.7×4.0mm) of uniform size for use.

[0045] Prepare chloroiridic acid and barium nitrate in proportion to impregnate the carrier particles at 40°C. The dry basis weight of the carrier contained in the impregnating solution is 1% Ir and 3% Ba. After aging for 8 hours and drying, the Oxidation in air at 350°C for 4h, and reduction in hydrogen at 300°C for 4h (this step can be done in a reactor) to obtain the finished catalyst 3.

[0046] Catalyst 3 was used in a fixe...

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Abstract

The present invention relates to a selective ring-opening catalyst and a preparation method thereof. A purpose of the present invention is to mainly solve the problems of poor polycyclic aromatic hydrocarbon ring-opening selectivity, low monocyclic aromatic hydrocarbon yield and rapid catalyst deactivation in the prior art. The technical scheme of the present invention comprises that the selective ring-opening catalyst comprises, by weight, 63.5-68.4% of at least one selected from alumina, amorphous silicon aluminum and a zeolite molecular sieve, 20-30% of pseudo boehmite, 0.1-1.5% of a noble metal Ir, and 0.1-5% of at least one selected from Ba, Zn and Mg. With the technical scheme, the problems in the prior art are well solved. The selective ring-opening catalyst of the present invention has characteristics of high polycyclic aromatic hydrocarbon ring-opening selectivity, high monocyclic aromatic hydrocarbon yield and slow catalyst deactivation, and can be used in the aromatic hydrocarbon refining field.

Description

technical field [0001] The invention relates to a selective ring-opening catalyst and a preparation method thereof. Background technique [0002] Benzene, toluene and xylene (BTX) are all important organic chemical raw materials. Benzene is the basic raw material for the preparation of styrene, nylon, polyester and other products; while toluene is used as a blending component of gasoline to increase the octane number, and can also be used to produce paints, adhesives, organic solvents, etc. in industry, agriculture and It is widely used in medicine; xylene is mostly used to produce polyester, chemical fiber and other products, which are closely related to the development of the national economy and people's clothing, food, housing and transportation. In recent years, the demand has been strong and increasing rapidly, and There will be a situation where supply exceeds demand, and it is very urgent to seek technologies for increasing the production of aromatics. However, wit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/58B01J29/12C07C15/04C07C15/06C07C15/08C07C15/02C07C4/12C07C4/26
CPCY02P20/52
Inventor 李旭光孔德金陈燕姜向东
Owner CHINA PETROLEUM & CHEM CORP
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