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A kind of method of 2-butene isomerization to produce 1-butene

A technology of isomerization and butene, applied in the direction of isomerization hydrocarbon production, organic chemistry, etc., can solve the problems of rare catalysts, etc., and achieve the effects of easy industrial production, low price, high activity and selectivity

Inactive Publication Date: 2011-12-07
成都欣华源科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are many catalysts that can catalyze the positional isomerization of 2-butene double bonds into 1-butene, such as metal oxides, metal sulfates and phosphates, supported noble metal catalysts, molecular sieves, ionic liquids, etc., the catalytic activity is good, High selectivity and good stability, catalysts with industrial application value are rare

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～6

[0036] According to Na 2 Prepare the supported catalyst at a ratio of 0.35% O loading, dissolve 0.340 g of anhydrous sodium carbonate in 82 ml of deionized water, and then take the strip-shaped Al that was roasted at a temperature of 500 ° C 2 o 3 Carrier 100ml, size Ф3×8~10mm, weight 57g, Al 2 o 3 The carrier was put into the sodium carbonate solution, soaked for 16 hours, filtered off the residual liquid, dried at a temperature of 120°C, and roasted at a temperature of 500°C for later use. The Na in the catalyst 2 The O content is 0.35%, and the specific surface area of ​​the catalyst is 205m 2 / g.

[0037] The above-mentioned supported catalyst is loaded into a fixed-bed catalytic reactor, and 2-butene gas is introduced. The main components of the gas are: trans-2-butene 64.3%, cis-2-butene 33.0%, 1-butene 2.7%, the reaction conditions are: pressure 0.1MPa, gas hourly space velocity 240h -1 , the content of 1-butene, isobutene and cracking product in the reaction prod...

Embodiment 7～10

[0039] According to K 2 O loading 0.60% and Na 2 The ratio of O loading 0.15% prepares supported catalyst, with 0.546 gram potassium chloride, 0.147 gram anhydrous sodium carbonate dissolves in 85ml deionized water, takes in the strip-shaped Al of temperature 600 ℃ roasting. 2 o 3 Carrier 100ml, size Ф3×8~10mm, weight 57g, Al 2 o 3 The carrier is put into the mixed solution of potassium chloride and sodium carbonate, immersed for 24 hours, the residual liquid is filtered off, dried at a temperature of 120°C, and roasted at a temperature of 500°C for later use. The K in the catalyst 2 O content is 0.60%, Na 2 The O content is 0.15%, and the specific surface area of ​​the catalyst is 180m 2 / g.

[0040] The above-mentioned supported catalyst is loaded into a fixed-bed catalytic reactor, and 2-butene gas is introduced. The main components of the gas are: trans-2-butene 64.3%, cis-2-butene 33.0%, 1-butene 2.7%. The reaction conditions are: temperature 450° C., pressure 0.5...

Embodiment 11

[0042] According to Na 2 Prepare the supported catalyst at a ratio of 2.0% O loading, dissolve 1.99 grams of anhydrous sodium carbonate in 95 ml of deionized water, and then take the strip-shaped Al 2 o 3 Carrier 100ml, size Ф3×8~10mm, weight 57g, Al 2 o 3 The carrier was put into the sodium carbonate solution, soaked for 18 hours, filtered off the residual liquid, dried at a temperature of 120°C, and roasted at a temperature of 600°C for later use. The Na in the catalyst 2 The O content is 2.0%, and the specific surface area of ​​the catalyst is 150m 2 / g.

[0043] The above-mentioned supported catalyst is loaded into a fixed-bed catalytic reactor, and 2-butene gas is introduced. The main components of the gas are: trans-2-butene 64.3%, cis-2-butene 33.0%, 1-butene 2.7%, the reaction conditions are: temperature 450°C, pressure 0.1MPa, gas hourly space velocity 60h -1 , the content of 1-butene in the reaction product is 23.1%, and the content of isobutene is 0.0%.

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Abstract

The invention discloses a method for isomerizing 2-butene to produce 1-butene, which is characterized in that the method comprises the following steps: calcining catalyst carrier alumina at a temperature of 400-600°C for 1-12 hours to increase the surface area of ​​the alumina At 150-210m2 / g, dissolve 0.146-23.82 parts by weight of metal salt in 82-100 parts by weight of deionized water to prepare an aqueous solution, and then put 57 parts by weight of the catalyst carrier that has been roasted into the above-mentioned metal salt solution. Stand and soak for 16-24 hours, filter off the residual liquid, bake at a temperature of 120-160°C for 4-10 hours until the water is completely removed, and then bake at a temperature of 500-600°C for 1-12 hours to obtain a metal composite oxide catalyst; The catalyst prepared by the above method is loaded in a fixed-bed catalytic reactor, and the 2-butene gas with a content of 85.0-99.0% is passed through the catalyst bed, at a temperature of 300-480°C and a pressure of 0.1-0.5MPa, the 2-butene Under the condition that the gas hourly space velocity of the feed is 60-900h-1, the double bond isomerization reaction is carried out, the gas after the reaction is regularly sampled and analyzed, and the 1-butene content is 19.0-27.0%.

Description

technical field [0001] The invention relates to a method for isomerizing 2-butene to produce 1-butene, which belongs to the field of organic catalysis. Background technique [0002] C 4 1-butene in olefins is an α-olefin with active chemical properties and a wide range of uses. The main use of 1-butene is as a comonomer for the preparation of linear low density polyethylene (LLDPE). 1-butene is hydroformylated to generate mixed valeraldehyde mainly composed of n-valeraldehyde, and isodecyl alcohol generated by condensation and hydrogenation of valeraldehyde is the main raw material for the synthesis of advanced plasticizers. Due to the wide range of uses of 1-butene, the demand has increased dramatically in recent years. [0003] The main sources of 1-butene are: [0004] 1. By-products obtained during catalytic cracking or thermal cracking in the refining process; [0005] 2. By-products obtained when saturated hydrocarbons are subjected to steam cracking to produce ot...

Claims

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Application Information

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IPC IPC(8): C07C11/08C07C5/25B01J23/04B01J23/58B01J23/78
Inventor 李贤均陈骏如胡家元兰小杭
Owner 成都欣华源科技有限责任公司
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