Device and method for producing propionic acid through OXO process

A technology of oxo synthesis and propionic acid, which is applied in the preparation of carboxylic acid by carbon monoxide reaction, separation/purification of carboxylic acid compounds, chemical recovery, etc., can solve the problems of high production cost, low yield of propionic acid, high separation cost, etc., and achieve improvement Efficiency, good cost advantage, effect of increasing flexibility

Pending Publication Date: 2021-03-05
SINOPEC CHANGCHENG ENERGY CHEM NINGXIA CO LTD
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Problems solved by technology

The synthesis of natural propionic acid mainly adopts fermentation method, but this method has low propionic acid yield and high separation cost
Propionic acid has been industrially prod

Method used

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  • Device and method for producing propionic acid through OXO process

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Embodiment Construction

[0016] The specific embodiments will be further described below in conjunction with the drawings of the present invention, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

[0017] like figure 1 As shown, a device for producing propionic acid by oxo synthesis includes a reactor 1, a flash tank 2, a light component tower 3, a drying tower 4, a heavy component tower 5, a stripping tower 6, a deacetic acid tower 7, and propionic acid Tower 8, ethanol-rich methanol raw material pump 9, catalyst mother liquor pump 10, light component tower bottom pump 11, light component tower bottom reflux pump 12, drying tower kettle pump 13, drying tower top reflux pump 14, heavy component tower Kettle pump 15, heavy component tower top reflux pump 16, stripping tower tank pump 17, deacetate tower tank pump 18, deacetate tower top reflux pump 19, prop...

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Abstract

The invention provides a device and method for producing propionic acid through an OXO process. The device comprises a reactor, a flash tank, a light component tower, a drying tower, a heavy componenttower, a stripping tower, an acetic acid removing tower, a propionic acid tower, an ethanol-rich methanol raw material pump, a catalyst mother liquor pump, a light component tower bottom pump, a drying tower bottom pump, a heavy component tower bottom pump, a stripping tower bottom pump and an acetic acid removing tower bottom pump which are connected through pipelines. The method comprises the following steps: adding a carbon monoxide raw material and an ethanol-rich methanol raw material into the reactor, and carrying out an OXO reaction under the action of a catalyst to generate a mixed solution of acetic acid and propionic acid; rectifying the mixed solution in an acetic acid rectifying area and a propionic acid rectifying area to obtain an acetic acid product and a propionic acid product respectively; pumping the catalyst into the reactor for recycling through the catalyst mother liquor pump in the flash tank,; and pumping light components such as methyl acetate, methyl iodide and water rectified from each tower top back into the reactor from the tower tops for recycling. According to the method, an ethanol-rich methanol product is used for producing acetic acid and propionicacid through the OXO process, so good economic benefits are obtained.

Description

technical field [0001] The invention belongs to the technical field of chemical preparation of propionic acid, in particular to a device and method for producing propionic acid by synthesizing hydroxyl groups. Background technique [0002] Propionic acid is a three-carbon carboxylic acid, which has the typical chemical properties of low-carbon carboxylic acids. It can prepare a variety of propionic acid derivatives. It is an important fine chemical and an intermediate of many other fine chemicals. Propionic acid can inhibit the growth of fungi, and is considered to be the most economical, safe and effective edible preservative and antifungal agent in the world. Propionic acid is widely used in food, feed, medicine, spices, electroplating, agricultural textiles and other fields. [0003] The production of propionic acid is mainly divided into natural fermentation method and chemical synthesis method. The synthesis of natural propionic acid mainly adopts fermentation method,...

Claims

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Application Information

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IPC IPC(8): C07C51/12C07C51/44C07C53/122C07C53/08
CPCC07C51/12C07C51/44C07C53/122C07C53/08Y02P20/584
Inventor 何洋
Owner SINOPEC CHANGCHENG ENERGY CHEM NINGXIA CO LTD
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