Method for preparing tert-butanol by extraction of carbon 4 hydrocarbon containing isobutene

A carbon tetrahydrocarbon and tert-butanol technology, applied in the field of continuous production of tert-butanol, can solve the problems of high energy consumption, reduced equipment utilization rate, etc., and achieves the advantages of reducing energy consumption, improving conversion rate and selectivity, and saving equipment investment costs Effect

Active Publication Date: 2009-05-06
PETROCHINA CO LTD
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  • Claims
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Problems solved by technology

However, the hydration reaction of isobutene is a liquid phase reaction. A large amount of gas phase produced in the reactive distillation reduces the utilization rate of the

Method used

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  • Method for preparing tert-butanol by extraction of carbon 4 hydrocarbon containing isobutene

Examples

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Example Embodiment

[0020] Example 1:

[0021] in 100×11000mm reaction extraction tower, divided into four sections 5×5mm cylindrical cation exchange resin catalyst, the total height of the catalyst is 10 meters, and the catalyst loading volume is 70L. The specific surface area of ​​the catalyst is 42m 2 / g, the exchange equivalent is 4.3mmol / g (dry basis), the porosity of the catalyst bed is 50%, and the top of the catalyst bed is filled 6×6mm porcelain Raschig ring 0.5m. At pressure 2.0MPa, reaction temperature 85℃, water / C 4 = 4(v / v), C 4 The concentration of isobutylene is 38.35wt%, C 4 At a flow rate of 0.4mm / s, C 4 After continuous reaction extraction operation, the isobutene conversion rate is 94.2%, the selectivity is 100%, and the C from the top of the tower 4 Does not contain TBA.

Example Embodiment

[0024] Example 2:

[0025] Using the same raw material composition as in Example 1, the reaction extraction tower in Example 1 was filled with the same amount of catalyst and ceramic Raschig ring packing. The pressure was 2.0MPa and the temperature was 85°C. 4 At a flow rate of 0.5mm / s, C 4 Continuous reaction extraction operation with water in the tower, when water / C 4 = 8(v / v), C 4 The conversion rate of isobutylene in the water can reach 95.0%, the selectivity is 100%; when water / C 4 =10(v / v), C 4 The conversion rate of isobutylene in the carbon dioxide can reach 99.4%, and the selectivity is 100%.

Example Embodiment

[0026] Example 3:

[0027] Use the reaction temperature, pressure, water / C in Example 1 4 (v / v) ratio and C4 hydrocarbons containing 18.72wt% isobutylene as raw materials, In the 32×8000mm reactive extraction tower, 6L of the same catalyst as in Example 1 is charged in 4 stages, 4 When the flow rate is 0.45mm / s, continuous reactive extraction, the conversion rate of isobutylene reaches 90.21%, and the selectivity is 100%.

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Abstract

The invention provides a method for continuously producing tertiary butyl alcohol by C4 hydrocarbon containing isobutene through a hydration reaction and extraction action in the presence of a cation exchange resin catalyst. The method is characterized in that a reactor and an extracting tower are combined in a device, the functions of the hydration reaction and the extraction separation are synchronously realized in the device, and the tertiary butyl alcohol generated by the reaction is extracted by water in time, thereby breaking through the limit of chemical equilibrium, improving the conversion rate and the selectivity of the isobutene, simplifying the flow, saving the investment cost for the device, also realizing heat integration, and greatly reducing the energy consumption in the production.

Description

technical field [0001] The invention relates to a method for preparing tert-butanol by reactive extraction of isobutene-containing C4 hydrocarbons, in particular to a method for continuously producing tertiary-butanol through reactive extraction with water in the presence of a cationic exchange resin catalyst. Background technique [0002] The C4 hydrocarbon fraction is a by-product of the ethylene unit and the catalytic cracking unit. Except for the butadiene in the cracked C4 hydrocarbon which is extracted as a chemical monomer, the chemical utilization rate of the remaining C4 hydrocarbon components is not high and is often used burnt as fuel. Tert-butyl alcohol (TBA) is an important chemical raw material, which can be used in paints and solvents to produce tert-butylphenol. Two-step oxidation and esterification of TBA can produce methyl methacrylate (MMA), which is an important plexiglass monomer and is widely used in the fields of automobiles, lighting, building materi...

Claims

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Application Information

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IPC IPC(8): C07C31/12C07C29/04B01J31/08
Inventor 李吉春林泰明李长明王小强董炳利王玫苟文甲孙世林程中克张慧刘飞杨利斌黄剑锋宋帮勇
Owner PETROCHINA CO LTD
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