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Method for preparing sec-butyl acetate by using acetic acid and butane

A technology of sec-butyl acetate and acetic acid, which is applied in the field of preparing sec-butyl acetate, can solve the problems of low reaction efficiency and poor mutual solubility, and achieve the effects of increasing reaction rate, high conversion rate, and strengthening microscopic mixing

Active Publication Date: 2013-02-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] Aiming at the deficiencies in the prior art, the present invention provides a method for preparing sec-butyl acetate from acetic acid and n-butene. By adding a static mixer before the reactor, the reactants are mixed evenly and the contact is more sufficient, which solves the problem of acetic acid and n-butene. The problem of poor miscibility of n-butene and low reaction efficiency improves the conversion rate

Method used

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  • Method for preparing sec-butyl acetate by using acetic acid and butane
  • Method for preparing sec-butyl acetate by using acetic acid and butane

Examples

Experimental program
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Effect test

Embodiment 1

[0032] The n-butene and acetic acid are pumped into the static mixer according to the ratio required for the reaction, and the static components are impacted in the static mixer for rapid mixing, then enter the reactor, and the reacted materials enter the phase separator for gas-liquid separation , The unreacted gas phase n-butene is circulated to the inlet of the static reactor, and the liquid phase enters the product after separation to obtain sec-butyl acetate product. The static mixer adopts a standard SV type static mixer.

[0033] The reactor is carried out in a stainless steel reactor of Φ18mm×1200mm, and 30ml of DA-330 temperature-resistant resin catalyst produced by Dandong Mingzhu Special Resin Co., Ltd. is filled in the reactor. The top and bottom of the reactor are respectively filled with a diameter of Φ0. For quartz sand of 5mm~1.2mm, after the reactor is installed, replace it with nitrogen three times, and the airtightness test is qualified, the reaction pressure i...

Embodiment 2

[0035] According to the method of Example 1, the static mixer adopts the SY type standard static mixer.

Embodiment 3

[0037] According to the method of Example 1, the static mixer adopts an SL standard static mixer.

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Abstract

The present invention discloses a method for preparing sec-butyl acetate by using acetic acid and butane. The acetic acid and n-butene are sufficiently mixed by continuously passing through a static mixer, and are fed into a reactor filled with a strongly acidic cation-exchange resin catalyst for an addition reaction; the materials after the reaction are fed into a phase separator for a gas-liquid separation; and a fractional distillation of the liquid phase obtained by the gas-liquid separation is performed in a fractionation column to obtain the sec-butyl acetate. Compared with the prior art, the process of the present invention has the advantages of a simple process, high conversion of acetic acid, high selectivity of sec-butyl acetate, less byproducts, and low energy consumption, etc.

Description

Technical field [0001] The invention discloses a method for preparing sec-butyl acetate from acetic acid and n-butene, in particular to a method for preparing sec-butyl acetate with acetic acid and n-butene in the presence of a strong acid cation exchange resin catalyst. Background technique [0002] Butyl acetate (including n-butyl acetate, sec-butyl acetate, isobutyl acetate and tert-butyl acetate) is an important organic chemical, which can be widely used in the preparation of greases, resins, coatings and paints As well as excellent organic solvents for organic reaction processes, extraction and separation processes, etc., it can also be used to prepare metal cleaning agents and perfumes. Especially in recent years, due to increasingly stringent environmental protection requirements, the use of solvents containing toxic substances such as benzene, toluene, and chlorinated hydrocarbons is gradually being restricted. The amount of environmentally friendly ester solvents has inc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C69/14C07C67/04
Inventor 田丹霍稳周李花伊吕清林刘野魏晓霞
Owner CHINA PETROLEUM & CHEM CORP
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