Catalyst and method for preparing butene-2 ​​by hydroisomerization of butene-1

A hydroisomerization and catalyst technology, applied in the direction of isomerization hydrocarbon production, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of poor selectivity of butene-2 ​​and n-butene Facing problems such as low conversion rate of hydroisomerization and low yield of total olefins, it can achieve high reaction space velocity, help reaction selectivity and water resistance, and low olefin hydrogenation rate

Active Publication Date: 2017-01-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] One of the technical problems to be solved by the present invention is the technical problems of low n-butene hydroisomerization conversion rate, low total olefin yield and poor butene-2 ​​selectivity in the prior art. Catalyst for the Hydroisomerization of En-1 to Butene-2

Method used

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  • Catalyst and method for preparing butene-2 ​​by hydroisomerization of butene-1
  • Catalyst and method for preparing butene-2 ​​by hydroisomerization of butene-1
  • Catalyst and method for preparing butene-2 ​​by hydroisomerization of butene-1

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Weigh 30 grams of pseudo-boehmite, 150 grams of θ-alumina, 5 grams of δ-alumina, and 9 grams of sesame powder, mix them, and then add 20 grams of polyvinyl alcohol solution (mass concentration of 5%), concentration 4.0 g of 68% nitric acid, 300 ml of aqueous solution, extruded into a clover-shaped carrier of φ2.5 mm, the wet bar is 120 o C dry at 750 for 4 hours o C was calcined for 4 hours to obtain carrier Z1. The carrier composition is shown in Table 1 and 2, and the carrier properties are shown in Table 3. The carrier is immersed in an equal amount in an impregnation solution with a metal nickel content of 8%, 60 o C dry for 8 hours, 450 o C was calcined for 4 hours to obtain Ni-based catalyst C1. The catalyst composition is shown in Table 4, and the content of each component is based on the weight of the catalyst.

Embodiment 2

[0022] Weigh 30 grams of pseudo-boehmite, 150 grams of θ-alumina, 20 grams of δ-alumina, 9 grams of sesame powder, and 10 grams of diatomaceous earth, mix them, and then add a solution containing polyvinyl alcohol (the mass concentration is 5 %) 20 grams, 4.0 grams of nitric acid with a concentration of 68%, 300 ml of aqueous solution, extruded into a clover-shaped carrier of φ 2.5 mm, the wet strip is 120 o C dry at 750 for 4 hours o C was calcined for 4 hours to obtain carrier Z2. The carrier composition is shown in Tables 1 and 2, and the carrier properties are shown in Table 3. The carrier is immersed in the same amount in the immersion solution with a metal nickel content of 10%, 60 o C dry for 8 hours, 450 o C was calcined for 4 hours to obtain Ni-based catalyst C2. The catalyst composition is shown in Table 4, and the content of each component is based on the weight of the catalyst.

Embodiment 3

[0024] Weigh 30 grams of pseudo-boehmite, 140 grams of θ-alumina, 45 grams of δ-alumina, 9 grams of sesame powder, and 30 grams of diatomaceous earth, mix them, and then add a solution containing polyvinyl alcohol (the mass concentration is 5 %) 20 grams, 4.0 grams of nitric acid with a concentration of 68%, 1.2 grams of magnesium nitrate, 310 ml of aqueous solution, squeezed into a clover-shaped carrier of φ 2.5 mm, the wet bar is 120 o C dry at 750 for 4 hours o C was calcined for 4 hours to obtain carrier Z3. The carrier composition is shown in Tables 1 and 2, and the carrier properties are shown in Table 3. The carrier is immersed in the same amount of immersion solution with a metal nickel content of 12% and a metal molybdenum content of 0.1%, 60 o C dry for 8 hours, 450 o C was calcined for 4 hours to obtain Ni-based catalyst C3. The catalyst composition is shown in Table 4, and the content of each component is based on the weight of the catalyst.

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Abstract

The invention relates to a catalyst and a method for preparing butene-2 through butene-1 hydroisomerization. The technical problems in the prior art the n-butene hydroisomerization is low in conversion rate, the total olefin yield is low and the butene-2 is low in selectivity are mainly solved. With the adoption of the technical scheme, a mixed-phase alumina carrier consisting of theta-phase alumina and delta-phase alumina is adopted, the theta-phase alumina accounts for 60-90wt%, and the delta-phase alumina accounts for 10-40wt%. The problems are well solved, and the catalyst and method can be used for industrial production of cracking C4 fractions and increasing the yield of butene-2.

Description

Technical field [0001] The invention relates to a catalyst and a method for olefin hydroisomerization, in particular to a catalyst and a method for preparing butene-2 ​​by hydrogen isomerization of butene-1 for C4 olefin disproportionation. Background technique [0002] Olefin disproportionation refers to the technology in which butene-2 ​​in the C4 fraction undergoes a metathesis reaction with ethylene to produce propylene under the action of a catalyst. The reaction uses non-precious metal catalysts, and the operating temperature is higher than 200~400 o C. The catalyst is easily deactivated due to the polymerization and gelation of butadiene and alkynes in the C4 component, resulting in poor catalyst stability and frequent regeneration. Through the hydrogen isomerization technology, the diolefins and alkynes in the raw materials can be removed first, and the butene-1 can be isomerized to the butene-2 ​​at the same time, which improves the quality of the raw materials for the d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/755B01J23/883B01J23/887B01J23/888C07C11/08C07C5/13C07C5/25
Inventor 赵多刘仲能王建强任杰顾国耀
Owner CHINA PETROLEUM & CHEM CORP
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