Regeneration method of cyclohexene hydration catalyst

Abstract

The invention relates to a regeneration method of a cyclohexene hydration catalyst. The regeneration method includes steps that: molecular sieve catalyst water solution with activity reduced in a cyclohexene hydration reaction is subjected to gas stripping so as to remove entrained organics, the catalyst solution is subjected to oxidization for further oil removing, and the catalyst with oil removed is subjected to filtering for impurity removing and harmonious stabilizing. The activity of the catalyst obtained after the steps is restored in the maximum limit, and the catalyst is directly sent back to a hydration reaction system by a pump for cycle use. The regeneration method of the cyclohexene hydration catalyst enables the catalyst activity to restore to be above 95% of the initial activity, and achieves online regeneration of the catalyst when the catalyst is in the slurry state same as that in a reactor.

Description

technical field [0001] The invention relates to a cyclohexene hydration process, in particular to a cyclohexene hydration catalyst regeneration method. Background technique [0002] Molecular sieve catalyst is used in cyclohexene hydration to prepare cyclohexanol because of its special catalytic performance. However, as the reaction proceeds, the activity of the catalyst will decrease. On the one hand, the organic matter in the reaction system occupies the acidic active center of the catalyst, causing the passivation of the catalyst. In addition, nitrogen-containing compounds, metal ions, etc. are also highly toxic to the catalyst, and the accumulation of various catalyst poisons also leads to a decrease in activity. In order to maintain the activity of the catalyst and keep the reaction going on normally, measures need to be taken to restore the performance of the catalyst. [0003] Patent CN1052468C discloses a cycloolefin hydration method, which uses a crystalline alumi...

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Problems solved by technology

[0005] Patent CN1092626C discloses a method of using zeolite as a catalyst to produce cyclohexanol through cyclohexene hydration, and proposes to improve the life of the catalyst by controlling the content of impurities such as 2-cyclohexene-1 ketone in cyclohexene, without Involved in the recovery of catalyst activity

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