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Butanone preparation and refining method

A refining method and technology of methyl ethyl ketone, which is applied in the field of preparation and refining of methyl ethyl ketone, can solve problems such as product surplus, and achieve the effects of short process, high purity of raw materials, and uniform temperature distribution

Active Publication Date: 2015-02-25
HUNAN RUIYUAN PETROCHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The invention provides a method for preparing and refining methyl ethyl ketone, the purpose of which is to expand the derivatives of sec-butyl acetate industry and solve the problem of product surplus that may be caused by the expansion of production capacity

Method used

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  • Butanone preparation and refining method

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preparation example Construction

[0057] In the present invention, the hydrogenation catalyst is prepared according to conventional methods. For example, the preparation method of the copper-chromium catalyst may include: adopting the method of excessive impregnation, the excess carrier γ-Al 2 o 3 Add it to the mixed solution of copper nitrate and chromium nitrate prepared according to a certain atomic ratio, soak it at room temperature for 20 hours, filter out the excess solution, dry the filter residue in an oven at 120°C for 12 hours, and then roast it in a muffle furnace to obtain copper - Chromium catalyst. The carrier includes γ-Al 2 o 3 , BaO-γ-Al 2 o 3 , MgO-γ-Al 2 o 3 Wait. The Cu / Cr atomic ratio in the copper nitrate and chromium nitrate solution is 1-30, the calcination temperature is 300-600°C, and the calcination time is 3-9h.

[0058] In the present invention, the dehydrogenation copper-zinc catalyst is prepared according to conventional methods. For example, the preparation method of t...

Embodiment 1

[0068] This embodiment is used to illustrate the preparation method of butanone of the present invention.

[0069] (1) Preparation of hydrogenation catalyst

[0070] Prepared according to the Cu / Cr atomic ratio of 2.35. Take copper nitrate (Cu(NO 3 ) 2 3H2O) 70g and chromium nitrate (Cr(NO 3 ) 3 9H 2O) 50g were dissolved in water at 50°C respectively to form a mixed aqueous solution, weighed 12g of carrier γ-Al2O3 and added to the solution, maintained in an incubator at 25°C for 20h. Ordinary filtration was used to remove excess solution, and the filtrate was dried in an oven at 120°C for 12 hours, and then calcined in a muffle furnace for 5 hours at 500°C to obtain a copper-chromium catalyst. Then take 4 parts by weight of the copper-chromium catalyst and 1 part by weight of alumina particles and mix evenly.

[0071] (2) Preparation of sec-butanol

[0072] The hydrogenation reactor is a small stainless steel fixed bed reactor. The inner diameter of the reaction chamb...

Embodiment 2

[0082] This embodiment is used to illustrate the preparation method of butanone of the present invention. Butanone was prepared according to the method of Example 1, the difference being the preparation of the hydrogenation catalyst. The copper-nickel catalyst is formulated according to the Cu / Ni atomic ratio of 12, and the loading is preferably such that alumina accounts for 50% of the total weight of the catalyst.

[0083] It can be known by calculation that the conversion rate of sec-butanol is 97.2%, the selectivity of butanone is 97.8%, and the purity of product butanone is 99.4%.

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Abstract

The invention provides a butanone preparation and refining method. The method includes: (A), subjecting sec-butyl acetate and hydrogen to hydrogenation reaction in a fixed-bed reactor filled with hydrogenation catalyst; (B), feeding a hydrogenation product obtained in the step (A) into a crude alcohol separating tower for separation so as to obtain crude ethanol at the tower top, and feeding tower bottom components into a sec-butyl alcohol refining tower for refining; (C), preheating high-purity sec-butyl alcohol obtained at the tower top of the sec-butyl alcohol refining tower prior to feeding the preheated high-purity sec-butyl alcohol into a dehydrogenation reactor filled with dehydrogenation catalyst for dehydrogenation reaction; (D), feeding a dehydrogenation product obtained in the step (C) into a butanone drying tower via a buffer tank, supplementing entrainer from the top of a return tank, and removing water in crude butanone by means of azeotropic distillation; (E), feeding the dewatered crude butanone in the step (D) into a butanone refining tower for distillation so as to obtain butanone with the mass fraction above 99% from the top of the butanone refining tower.

Description

technical field [0001] The invention relates to a method for preparing and refining butanone. technical background [0002] Along with the application and promotion of sec-butyl acetate in the market, different purposes have been developed, and its application prospect makes the production scale constantly expand. Since 2008, sec-butyl acetate has become a bulk chemical product, and the development of its downstream products has gradually attracted the attention of major manufacturers and scientific research institutions. [0003] Among the downstream products of sec-butyl acetate, sec-butanol is the most important one, which can be used as emulsifier, dye dispersant, dehydrating agent, paint remover, industrial detergent, etc., and also used as plasticizer, weed control agent, oil extractant. Because adding an appropriate amount of sec-butanol to the coating can increase the processing performance and ductility of the coating, it can be used as a cosolvent for nitro spray...

Claims

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Application Information

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IPC IPC(8): C07C49/10C07C45/29C07C45/54C07C31/08C07C31/12C07C29/149
CPCC07C29/149C07C29/82C07C45/41C07C45/82C07C45/83C07C49/10C07C31/08C07C31/12
Inventor 甘健李园园刘成
Owner HUNAN RUIYUAN PETROCHEM
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