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Preparation method of isopropanol

A technology of isopropanol and isopropyl acetate, which is applied in the preparation of organic compounds, chemical instruments and methods, and the preparation of oxygenated compounds, can solve the problems of complicated process, increased side reactions of hydrogenation reaction, and high energy consumption. Achieve the effects of improved product selectivity, mild reaction conditions, and high catalytic activity

Active Publication Date: 2017-05-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the process is complicated, the energy consumption is high, and the product yield is low
Especially catalytic addition and hydrogenation technology, it is easy to make unreacted propylene produce oligomerization products under hydrogenation reaction conditions, which increases the side reactions of hydrogenation reaction, the selectivity of target products is low, and product separation is more difficult

Method used

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  • Preparation method of isopropanol

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Embodiment 1

[0020] D005 type strong acid cation exchange resin catalyst was used, which was purchased from Dandong Mingzhu Special Resin Co., Ltd. The D005 strong acid cation exchange resin needs to be modified before use. Place the D005 strong acid cation exchange resin in isopropanol solvent. The volume ratio of isopropanol to D005 strong acid cation exchange resin is 3:1. Soak for 24 hours, then pass nitrogen gas in three stages, the first stage is at a pressure of 0.5MPa, temperature 60°C, and the flow rate of nitrogen gas is 1m 3 / h; the conditions for feeding nitrogen in the second stage are pressure 0.8MPa, temperature 80°C, nitrogen flow rate 3m 3 / h; the conditions for feeding nitrogen in the third stage are pressure 1.2MPa; temperature 100°C, nitrogen flow rate 6m 3 / h.

[0021] Take the above-mentioned modified catalyst and put it into a Φ18mm×1200mm stainless steel reactor. The top and bottom of the reactor are respectively filled with quartz sand with a diameter of Φ0.5mm~1...

Embodiment 2

[0023] According to the method for embodiment 1, just replace Virahol with ethanol, its condition is identical with embodiment 1.

Embodiment 3

[0025] According to the method for embodiment 1, just replace Virahol with methyl alcohol, its condition is identical with embodiment 1.

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Abstract

The invention provides a preparation method of isopropanol. The preparation method of isopropanol comprises the following steps: (1) adding conventional strong-acid cation-exchange resin into a low-carbon alcohol solvent, soaking for 8-24 hours at a temperature of 50-150 DEG C, then introducing inert gas in three stages, and obtaining a catalyst applied to hydrolysis reaction of isopropyl acetate after modification is completed; (2) hydrolyzing isopropyl acetate and water in the presence of a strong-acid cation-exchange resin catalyst modified in the step (1) to generate a mixture with isopropyl alcohol and acetic acid, separating the mixture to obtain isopropyl alcohol, and concentrating the acetic acid and then recycling the acetic acid. The method has the advantages of simple processes, high conversion rate and low energy consumption.

Description

technical field [0001] The invention relates to a method for preparing isopropanol, in particular to a method for preparing isopropanol by hydrolyzing isopropyl acetate under the action of an acidic cation exchange resin. Background technique [0002] Isopropanol is an important organic chemical raw material, which has a wide range of uses in the fields of pesticides, medicine, electronics, daily chemicals, and gasoline additives. Although the production of isopropanol in my country has increased year after year, it still cannot meet the domestic demand, so a large amount of isopropanol is imported every year. [0003] At present, the industrial production method of isopropanol at home and abroad is mainly propylene hydration method, and its process route can be divided into propylene indirect hydration method and propylene direct hydration method. US patent US3352930 uses propylene indirect hydration method to prepare isopropanol, dilutes sulfuric acid to 70%~80% with wate...

Claims

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Application Information

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IPC IPC(8): C07C31/10C07C27/02
CPCC07C29/095C07C31/10
Inventor 霍稳周刘野张宝国李花伊邓玉媛
Owner CHINA PETROLEUM & CHEM CORP
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