Olefin hydration process

Abstract

The invention discloses an olefin hydration process which comprises the following contents: an olefin hydration reactor is provided with n catalyst bed layers from bottom to top, a reaction mixed raw material containing an olefin phase and a water phase is divided into a feed I and a feed II, the feed I is divided into n streams after being mixed and dispersed, and the n streams are introduced from the lower parts of the catalyst bed layers; mixing and dispersing the feed II, dividing the feed II into y strands, introducing the y strands into the upper parts of different catalyst bed layers, enabling each feed to pass through each catalyst bed layer from bottom to top, carrying out olefin hydration reaction in the catalyst bed layers, and enabling a final reaction product to flow out from the top of the reactor and enter a next separation unit. According to the process disclosed by the invention, reactor feed is divided into two kinds of feed of olefin liquid drops with different water-olefin ratios and different sizes, the feed is introduced into different parts of a catalyst bed layer, and the mass transfer effect of olefin and water is enhanced, so that a relatively high olefin hydration reaction rate is kept in the whole catalyst bed layer, the water-olefin ratio is reduced, the conversion per pass of olefin is improved, and the yield of olefin is increased. The number and volume of reactors are reduced, and energy consumption in the separation process is reduced.

Description

technical field [0001] The invention belongs to the technical field of organic chemical industry, in particular to an olefin hydration process. Background technique [0002] The olefin hydration process is a liquid (olefin)-liquid (water)-solid (catalyst) three-phase catalytic reaction, so the reaction rate and conversion rate are greatly affected by liquid-liquid mass transfer. Due to the low mutual solubility of the two liquid phases of olefin and water, the reaction efficiency and production capacity of the olefin hydration process are restricted. Among olefin hydration reactions, cyclohexene hydration to cyclohexanol, n-butene hydration to sec-butanol, isobutene hydration to tert-butanol, and isoamyl hydration to tert-amyl alcohol are typical and important olefin hydration reactions. The more typical ones are the hydration of cyclohexene to cyclohexanol and the hydration of n-butene to sec-butanol. The single-pass conversion rate in the prior art is low, which not only ...

AI Technical Summary

Problems solved by technology

[0005] To sum up, for the process of olefin hydration, mainly cyclohexene hydration to cyclohexanol, n-butene hydration to sec-butanol), mass transfer is greatly affected by the low miscibility of olefins and water and easy phase separation. Therefore, how to make the two phases in a highly mixed state during the olefin hydration reaction without phase separation is a process route that can effectively solve the problems of low reaction rate and long residence time caused by the low mass transfer rate of olefin hydration. It is of great significance to greatly improve the olefin hydration reaction rate and single-pass conversion rate

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