Preparation method of catalyst for butylene oxidative dehydrogenation to produce butadiene

Abstract

The invention relates to a preparation method of a catalyst for butylene oxidative dehydrogenation to produce butadiene, and mainly solves the problems of easy loss of components in precipitation process and poor reproducibility in the existing preparation of the catalyst. The invention adopts ball milling method to grind iron oxide, magnesium oxide, zinc oxide and a catalytic promoter in the form of oxides into powder, so as to obtain a mixture of complex metal oxides, the mixture is subjected to high-temperature calcination to obtain butylene, and butylene is subjected to oxidative dehydrogenation to obtain butadiene. The technical scheme well solves the problem, and can be used in industrial production of butadiene from butylene oxidative dehydrogenation.

Description

technical field

[0001] The invention relates to a preparation method of a catalyst for preparing butadiene by oxidative dehydrogenation of butene. Background technique

[0002] Butadiene is the basic raw material of petrochemical industry and an important monomer for the production of polymer synthetic materials. It can be copolymerized with various compounds to produce various synthetic rubbers and synthetic resins. At present, there are mainly two production methods of butadiene: steam cracking in refinery to ethylene co-production, C4 extraction and separation and butene oxidation. Almost all butadiene in my country comes from C4 extraction and separation. This process has economic advantages, but it is obtained as a by-product of the refinery cracking unit. With the increase in demand for butadiene production in the rubber industry, the cracking unit The production of butadiene has been difficult to meet the demand. Butene oxidative dehydrogenation is a process in which...

Examples

Embodiment 1

[0028] Take 46.0g iron oxide (Fe 2 o 3 ), 20.0g magnesium oxide (MgO), 8.0g zinc oxide (ZnO), 1.6g manganese oxide (MnO 2 ) and 0.8g P 2 o 5 , and then added 3.0 g of glucose, and then mixed in a ball mill for 120 minutes, sifted >200 mesh powder (standard sieve), and calcined at 700 ° C for 6 hours to obtain composite oxide catalyst A.

[0029]

Embodiment 2

[0031] Take 24.0g iron oxide (Fe 2 o 3 ), 8.0g magnesium oxide (MgO), 10.0g zinc oxide (ZnO), 1.0g manganese oxide (MnO 2 ) and 2.0g P 2 o 5 , and then add 3.0g of polyvinyl alcohol, then mix in a ball mill for 30 minutes, sieve >200 mesh powder (standard sieve), and bake at 700°C for 8 hours to obtain composite oxide catalyst B.

[0032]

Embodiment 3

[0034] Take 36.2g iron oxide (Fe 2 o 3 ), 8.0g magnesium oxide (MgO), 11.0g zinc oxide (ZnO), 1.0g manganese oxide (MnO 2 ) and 2.0g P 2 o 5 , and then added 5.0 g of glucose, and then mixed in a ball mill for 60 minutes, screened the >150 mesh part powder (standard sieve), and calcined at 750 ° C for 6 hours to obtain composite oxide catalyst C.

[0035]

technical field

[0001] The invention relates to a preparation method of a catalyst for preparing butadiene by oxidative dehydrogenation of butene. Background technique

[0002] Butadiene is the basic raw material of petrochemical industry and an important monomer for the production of polymer synthetic materials. It can be copolymerized with various compounds to produce various synthetic rubbers and synthetic resins. At present, there are mainly two production methods of butadiene: steam cracking in refinery to ethylene co-production, C4 extraction and separation and butene oxidation. Almost all butadiene in my country comes from C4 extraction and separation. This process has economic advantages, but it is obtained as a by-product of the refinery cracking unit. With the increase in demand for butadiene production in the rubber industry, the cracking unit The production of butadiene has been difficult to meet the demand. Butene oxidative dehydrogenation is a process in which...

Examples

Embodiment 1

[0028] Take 46.0g iron oxide (Fe 2 o 3 ), 20.0g magnesium oxide (MgO), 8.0g zinc oxide (ZnO), 1.6g manganese oxide (MnO 2 ) and 0.8g P 2 o 5 , and then added 3.0 g of glucose, and then mixed in a ball mill for 120 minutes, sifted >200 mesh powder (standard sieve), and calcined at 700 ° C for 6 hours to obtain composite oxide catalyst A.

[0029]

Embodiment 2

[0031] Take 24.0g iron oxide (Fe 2 o 3 ), 8.0g magnesium oxide (MgO), 10.0g zinc oxide (ZnO), 1.0g manganese oxide (MnO 2 ) and 2.0g P 2 o 5 , and then add 3.0g of polyvinyl alcohol, then mix in a ball mill for 30 minutes, sieve >200 mesh powder (standard sieve), and bake at 700°C for 8 hours to obtain composite oxide catalyst B.

[0032]

Embodiment 3

[0034] Take 36.2g iron oxide (Fe 2 o 3 ), 8.0g magnesium oxide (MgO), 11.0g zinc oxide (ZnO), 1.0g manganese oxide (MnO 2 ) and 2.0g P 2 o 5 , and then added 5.0 g of glucose, and then mixed in a ball mill for 60 minutes, screened the >150 mesh part powder (standard sieve), and calcined at 750 ° C for 6 hours to obtain composite oxide catalyst C.

[0035]

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