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Combined technique for synthesizing iso-propylidene acetone and sec-butyl alcohol

A technology of mesityl oxide and combined process, which is applied in chemical instruments and methods, preparation of organic compounds, preparation of hydroxyl addition, etc., can solve the problem of low conversion rate, achieve the effect of increasing conversion rate and reducing energy consumption

Active Publication Date: 2015-06-17
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

But because this reaction is an equilibrium reaction, the conversion rate is very low, so no one has adopted this route to produce MO so far.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1~2

[0046] The catalyst used in the experiment is DNW type temperature-resistant strongly acidic cation exchange resin, and its physical properties are shown in Table 1. A fixed-bed reactor was used for the reaction, and 200 ml of catalyst was taken and loaded into a stainless steel reactor with an inner diameter of 25 mm and a length of 1200 mm. The purity of the raw material acetone is >99%, and the purity of n-butene is 90%~92.20. The reaction is under-feeding, and the raw materials enter the reactor for synthesis reaction. The reaction materials flow out from the top of the reactor and enter the separator after being cooled. The gas phase is discharged from the top of the separator, and the liquid phase at the bottom is regularly sampled. The composition is analyzed by gas chromatography. The specific reaction conditions and results are listed in Table 4.

[0047] Table 4 The reaction conditions and results of synthesizing MO and sec-butanol from acetone and n-butene.

[0...

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Abstract

The invention relates to a combined technique for synthesizing iso-propylidene acetone and sec-butyl alcohol. According to the technique, a fixed bed reactor is adopted, solid acid is used as a catalyst, feedstock includes acetone and n-butene, and acetone is subjected to condensation reaction at a catalytic reaction bed to generate iso-propylidene acetone and water; n-butene and water react to generate sec-butyl alcohol; products from the reactor are sent into a high-pressure separator after being cooled and depressurized, and unreacted n-butene is gasified, subjected to gas-liquid separation and recycled to the reactor; the liquid phase is separated to obtain corresponding substances. The technique provided by the invention provides a new method for producing MO at one step by condensation of bimolecular acetone, and can break reaction balance and improve the conversion rate so as to reduce energy consumption and the production cost of products.

Description

technical field [0001] The invention relates to a combined process for synthesizing mesityl oxide from acetone and sec-butanol from n-butene. Background technique [0002] Mesityl oxide (alias: mesityl acetone, 4-methyl-4-pentanone, iso-Propylidene acetone 4-Methyl-4-penten-2-one, referred to as MO) is a medium boiling point strong solvent, the main Used as a solvent for nitrocellulose and various resins, especially vinyl resins and spray paints; it is also an important intermediate in organic synthesis, mainly used in drugs, fine chemicals and pesticides, etc., and is also used for the production of methyl iso Raw material for butyl(methyl)ketone and methyl isobutanol. [0003] The traditional production method of mesityl oxide is a two-step method: [0004] In the first step, acetone (AC) is compressed and compressed in the presence of a basic catalyst to convert it into diacetone alcohol (DAA). The catalyst is calcium hydroxide or barium hydroxide. [0005] Acetone con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C49/203C07C45/73C07C31/10C07C29/04
CPCC07C29/04C07C45/74C07C49/203C07C31/10
Inventor 艾抚宾乔凯徐彤袁毅陈明翟庆铜苏杰张淑梅黎元生
Owner CHINA PETROLEUM & CHEM CORP
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