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An ethanol product with low acidity

A low-acidity, product technology, applied in the preparation of organic compounds, organic chemistry, separation/purification of hydroxyl compounds, etc., can solve the problems of high energy consumption of rectification deacidification, large size of deacidification tower, low acid value, etc.

Active Publication Date: 2018-03-02
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

In these patents, acetic acid is generally removed first by rectification, which can reduce the material requirements in the subsequent separation, thereby reducing investment costs, but there are also some problems: ethanol and ethanol, which account for the vast majority of product quality Water needs to be vaporized, so the energy consumption of rectification and deacidification is extremely high, and the deacidification tower has a large size and high material requirements, and the investment cost is extremely high; and in the actual rectification separation, there may be a very small amount of In the case of acetic acid, fuel ethanol and industrial ethanol products have strict requirements on acidity, so the product is unqualified in the case of operational fluctuations
[0009] The present invention proposes a method for direct hydrogenation of acetic acid with low energy consumption and low material consumption level to ethanol, the method can avoid the problem of high energy consumption in the prior art, and the inventor has reduced the Material consumption level and investment cost are reduced, especially the ethanol product obtained by the present invention has an ultra-low acid value, thereby having extremely high quality and application prospects

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  • An ethanol product with low acidity

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Embodiment Construction

[0058] The following examples are illustrative descriptions of the present invention in more detail, but the present invention is not limited to these examples.

[0059] In this embodiment, the specific flow chart is shown in the attachment figure 1 shown.

[0060] First, preheat the acetic acid raw material, return material and hydrogen to form a steam feed stream, and introduce the steam feed stream into the reactor R101 equipped with a gas-phase hydrogenation catalyst. The catalyst for the gas-phase hydrogenation of acetic acid is produced by Beijing Research Institute of Chemical Industry The acetic acid hydrogenation catalyst, (1) cobalt, wherein cobalt metal content accounts for 18wt% of catalyst gross weight; (2) molybdenum and tin, respectively account for 3wt% and 34wt% of catalyst gross weight; (3) boron and bismuth, respectively It accounts for 2wt% and 5wt% of the total weight of the catalyst, and the balance is silicon dioxide. Acetic acid is hydrogenated to cru...

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Abstract

An ethanol product with low acidity is provided. The content of ethanol in the ethanol product is 99.9-92 wt%. The acid value calculated based on acetic acid is 0-5 mg / L. The ultraviolet light transmittance is 50-99 at a wavelength of 220 nm.

Description

technical field [0001] The present invention relates to an ethanol product, and more particularly, to a high quality ethanol product with low acidity. Background technique [0002] Ethanol is the earliest and most widely used fatty alcohol, and it is also the main component of wine. At present, the industrial production methods of ethanol mainly include fermentation method and ethylene hydration method. Ethylene hydration method is developed along with the rise of petrochemical industry, including indirect hydration method and direct hydration method. Due to the increase of ethylene production cost in recent years, the ethylene process is basically in a state of suspension in my country. The main raw material of the fermentation method is crops (including corn, sugarcane, sorghum, cassava, rice, etc.), and ethanol is obtained by fermenting starch in the crops. [0003] The raw materials used by my country's main ethanol production enterprises are corn, wheat and cassava (...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C31/08C07C29/149C07C29/74C07C29/88
Inventor 黄龙戴伟田保亮杨溢唐国旗王国清彭晖李宝芹
Owner CHINA PETROLEUM & CHEM CORP
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