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A sec-butanol production process

A production process, the technology of sec-butanol, is applied in the preparation of organic compounds, the reaction preparation of carboxylic acid/symmetric anhydride and saturated hydrocarbon, organic chemistry, etc. It can solve the problems of high hydrogen mole, high temperature and low catalyst space velocity, etc. Achieve the effects of increasing the space velocity, reducing the serious corrosion of equipment, and reducing the reaction temperature

Active Publication Date: 2018-01-05
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the temperature of this reaction is high, and the hydrogen molar ratio is high, and the catalyst space velocity is low.

Method used

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  • A sec-butanol production process

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Effect test

Embodiment 1

[0026] Adopt above-mentioned attached of the present invention figure 1 The process flow shown: Propionic acid and carbon four are used as raw materials, the content of n-butene in carbon four is 85%, resin is used as a catalyst, a fixed-bed reactor is used, the reaction temperature is 70°C, and the conversion rate of n-butene is 52.5% . Using the sec-butyl propionate generated by the reaction as the raw material, the ester hydrogenation process is used to produce sec-butanol, and the catalyst used is Cu-Pt-Al 2 o 3 , where the mass fraction of Pt is 0.12wt%, the mass fraction of Cu is 32.3wt%, and the rest is alumina, the reaction temperature is 190°C, and the mass space velocity is 1.0h -1 , the conversion rate of sec-butyl propionate is 98%, the yield of sec-butanol is 95.5%, and the single pass conversion rate of n-butene in the invention process is 51.45%.

Embodiment 2

[0028] Adopt above-mentioned attached of the present invention figure 1 The process flow shown: Propionic acid and n-butene are used as raw materials, the content of n-butene in C4 is 25%, resin is used as a catalyst, a fixed-bed reactor is used, the reaction temperature is 70°C, and the conversion rate of n-butene is 51.5%. . The sec-butyl propionate generated by the reaction is used as the raw material, and the catalyst used is Cu-Pt-Al2 o 3 , wherein the mass fraction of Pt is 0.10wt%, the mass fraction of Cu is 33.9wt%, and the rest is alumina, the reaction temperature is 200°C, and the mass space velocity is 0.8h -1 , the conversion rate of sec-butyl propionate is 96%, the yield of sec-butanol is 94.5%, and the single pass conversion rate of n-butene in the invention process is 49.44%.

Embodiment 3

[0030] Adopt above-mentioned attached of the present invention figure 1 The process flow shown: Propionic acid and n-butene are used as raw materials, the content of n-butene in C4 is 45%, resin is used as a catalyst, a fixed-bed reactor is used, the reaction temperature is 90°C, and the conversion rate of n-butene is 53.5%. . The sec-butyl propionate generated by the reaction is used as the raw material, and the catalyst used is Cu-Pt-Al 2 o 3 , where the mass fraction of Pt is 0.40wt%, the mass fraction of Cu is 50wt%, and the rest is alumina, the reaction temperature is 180°C, and the mass space velocity is 2h -1 , the conversion rate of sec-butyl propionate is 95.7%, the yield of sec-butanol is 93.5%, and the single-pass conversion rate of n-butene in the invention process is 49.29%.

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Abstract

The invention provides a sec-butanol production process and belongs to the technical field of organic synthesis. The process is characterized in that the process comprises steps of subjecting propionic acid and C4 to an esterification reaction firstly; preheating a material mixture obtained by esterification and hydrogen; then performing a hydrogenation reaction; controlling the mole ratio of thehydrogen to the material mixture; and subjecting a material discharged from a hydrogenation reactor to separation by rectification through a separating column to obtain sec-butanol; and a double-atomcatalyst including a copper base and a platinum group element is adopted so that the reaction temperature can be reduced and the mass space velocity can be increased. The process lowers the temperature of the ester hydrogenation reaction, increases the space velocity, and increase the economical efficiency of a process of preparing sec-butanol through ester hydrogenation. In addition, severe equipment corrosion, more side reactions, difficult product separation and much waste water in a sec-butanol production process are reduced.

Description

technical field [0001] A production process of sec-butanol belongs to the technical field of organic synthesis. Background technique [0002] Sec-butanol (SBA) is a colorless liquid with a fragrance, the boiling point is 99.5 ° C, soluble in water, and is an excellent solvent, synthetic raw material and gasoline additive. As a solvent, it can be used as a paint co-solvent. As a synthetic raw material, sec-butanol can be dehydrogenated to produce methyl ethyl ketone (MEK), which is used to produce butyl acetate and sec-butyl ester, etc.; sec-butanol can also be used to produce plasticizers, dehydrating agents, mineral processing agents, emulsifiers, weed control agent etc. The use of sec-butanol as a raw material for organic synthesis accounts for 90% of its total consumption. With the shortage of petroleum resources, blending gasoline as vehicle driving fuel has become a trend nowadays. Compared with other types of blended gasoline, sec-butanol gasoline has the following...

Claims

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Application Information

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IPC IPC(8): C07C29/149C07C31/12C07C67/035C07C69/24
Inventor 郭岩锋王文彬彭光辉孙丛丛董凌云王鹏
Owner CHINA PETROLEUM & CHEM CORP
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