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Method for preparing alcohols from olefin

A technology of olefins and acetates, applied in chemical instruments and methods, preparation of hydroxyl compounds, preparation of organic compounds, etc., can solve the problems of high reaction pressure, low single-pass conversion rate, low reaction conversion rate, etc., and achieve mild reaction conditions , High raw material conversion rate, good product selectivity

Active Publication Date: 2011-08-10
HUNAN CHANGLING PETROCHEM SCI & TECH DEV CO LTD
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Problems solved by technology

Olefin hydration method to prepare the corresponding alcohol has high reaction pressure, low conversion rate per pass, and high water-ene ratio, so the equipment investment is large and the energy consumption for separation is high.
Alcohol synthesis by olefin carbonylation and hydrogenation includes two steps of homogeneous hydroformylation and heterogeneous hydrogenation. Under homogeneous reaction conditions, the loss of catalyst and raw materials is large, and the energy consumption of product separation is high
It can be seen that the current method for synthesizing alcohol has the disadvantages of low reaction conversion rate, high reaction pressure, large loss of raw materials or high energy consumption.

Method used

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  • Method for preparing alcohols from olefin

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Experimental program
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Effect test

Embodiment 1～5

[0016] In the catalytic distillation tower, a certain proportion of olefins and acetic acid are countercurrently contacted on the surface of different solid acid catalysts, and the corresponding acetates are synthesized by catalytic esterification. The specific data are shown in Table 1.

[0017] Table 1 Synthesis of acetate from acetic acid and olefins by catalytic distillation

[0018]

Embodiment 6

[0020] The catalyst is CuO-ZnO-Al 2 o 3 (CuO content is 20% (wt), ZnO content is 70% (wt), Al 2 o 3 The content is 10% (wt)), the raw material for hydrogenation is sec-butyl acetate, the process conditions are: the reaction temperature is 170°C, the reaction pressure is 7.0Mpa, and the ester liquid space velocity is 0.1h -1 , The hydrogen ester molar ratio is 40. The reaction results are: ester conversion rate 93.5%, ethanol selectivity 100%, sec-butanol selectivity 100%.

Embodiment 7

[0022] The catalyst is CuO-MnO 2 -BaO-ZrO 2 (CuO content is 60% (wt), MnO 2 content of 20% (wt), BaO content of 5% (wt), ZrO 2 The content is 15% (wt)), the hydrogenation raw material is ethyl acetate, the process conditions are: the reaction temperature is 190°C, the reaction pressure is 3.0Mpa, and the ester liquid space velocity is 0.3h -1 , The hydrogen ester molar ratio is 160. The reaction result is: ester conversion rate 94.2%, ethanol selectivity 100%.

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Abstract

The invention discloses a method for preparing alcohols from olefin. The method comprises an esterification process and a hydrogenation process. The method comprises the following steps of: performing countercurrent contact on olefin and acetic acid in a catalytic distillation tower on the surface of a solid acid catalyst, and synthesizing corresponding acetic ester by catalytic esterification; and then catalytically converting the acetic ester and hydrogen into corresponding alcohols in a fixed bed reactor by using the synthesized acetic ester as a raw material under a copper-containing hydrogenation catalyst and reaction conditions. The method has the characteristics of simple process flow, mild reaction conditions, low energy consumption, high raw material conversion rate and good production selectivity. Moreover, the method for preparing the corresponding alcohols from the olefin can be also used for preparing acetic ester and ethanol products which are wide in application.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, in particular to a method for preparing alcohol from olefins. Background technique [0002] Alcohol has many uses, and can be used as clean gasoline additives, liquid fuels and oil substitutes, and raw materials for bulk chemical production. In addition, higher alcohols can also be used as surfactants, demulsifiers, dye dispersants, dehydrating agents, paint removers, industrial detergents, etc.; they can also be used as plasticizers, oil extractants, wetting agents, fragrances, etc. The manufacture has great economic value. [0003] The well-known and industrially commonly used routes for synthesizing alcohols are mainly olefin hydration and olefin carbonylation hydrogenation. Olefin hydration method to prepare the corresponding alcohol has high reaction pressure, low single-pass conversion rate and high water-ene ratio, so the equipment investment is large and the separation energy ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C31/08C07C31/12C07C31/125C07C31/135C07C31/10C07C29/149B01J31/08B01J23/80B01J23/889B01J23/89B01J23/86B01J23/83
CPCY02P20/10
Inventor 李庆华向明林佘喜春
Owner HUNAN CHANGLING PETROCHEM SCI & TECH DEV CO LTD
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