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Method for producing high-concentration alcohol

A manufacturing method and high-concentration technology, which is applied in the field of manufacturing high-concentration alcohol from water-alcohol mixtures and high-concentration alcohol manufacturing equipment, can solve problems such as difficult to purify organic compounds, and achieve high purity and overall high efficiency of the process.

Active Publication Date: 2017-05-31
MITSUBISHI RAYON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the case of removing only water from a mixture of organic compounds such as alcohols, ketones, ethers, and water, the mixture of water and organic compounds becomes an azeotropic mixture with the lowest boiling point, and it is difficult to obtain a high-concentration mixture only by ordinary rectification. purify organic compounds

Method used

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  • Method for producing high-concentration alcohol
  • Method for producing high-concentration alcohol
  • Method for producing high-concentration alcohol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0193] As an aqueous reaction mixture for hydrothermal synthesis, the following were prepared.

[0194] to aluminum hydroxide (containing Al 2 o 3 53.5% by mass, manufactured by Aldrich) were added 1 mol / L-KOH aqueous solution and water, mixed and stirred to dissolve, and a solution was prepared.

[0195] Colloidal silica (manufactured by Nissan Chemical Co., Ltd., SNOWTEX-40) was added thereto, and stirred for 2 hours to prepare an aqueous reaction mixture.

[0196] The composition (molar ratio) of the aqueous reaction mixture is SiO 2 / Al 2 o 3 / KOH / H 2 O=1 / 0.125 / 0.7 / 80, SiO 2 / Al 2 o 3 =8.

[0197] As the inorganic porous support, a porous alumina tube (outer diameter: 12 mm, inner diameter: 9 mm) was used.

[0198] 5.00 g of NaOH and 100 g of water were mixed with 10.0 g of proton-type Y-type zeolite (HY (SAR=5), manufactured by Catalyst Chemicals Co., Ltd.), and the resulting mixture was heated at 100° C. for 7 days, filtered, washed with water, and dried. , t...

Embodiment 2

[0206] Use with SiO 2 / Al 2 o 3 The zeolite-membrane complex of the zeolite membrane of the CHA-type zeolite with a molar ratio of 7 is used to make water selectively from the separated liquid at 100°C, that is, hydrous ethanol (water / ethanol=49 / 51% by mass) by pervaporation. Permeable membrane separation process.

[0207] A schematic diagram of the apparatus used in pervaporation is shown in Figure 7 .

[0208] Figure 7 Among them, the liquid to be separated (volume 4.0 L) located in the raw material tank 11 is transported to the membrane separation device 14 by the circulation pump 12 at a flow rate of 1.0 L / min.

[0209] The liquid to be separated was heated to 100° C. by an electric heater 13 before being introduced into the membrane separation device 14 . The inside of the zeolite membrane complex in the membrane separation device 14 is depressurized by a vacuum pump 19 so that the pressure difference between the outside in contact with the liquid to be separated ...

Embodiment 3

[0213] In the same manner as in Example 2, a membrane separation step of selectively permeating water from 100° C. hydrous ethanol (water / ethanol=32 / 68% by mass) was performed by the pervaporation method. The permeation flux of water is 10.4kg / (m 2 • h), the concentration of water in the permeate was 99.99% by mass. The measurement results are shown in Table 1.

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Abstract

The purpose of the present invention is to provide a method for producing high-concentration alcohol from a water-alcohol mixture, the method being efficient as an overall process. The present invention pertains to a method for producing high-concentration alcohol, the method having: a water adsorption step for obtaining a first concentrated alcohol by adsorbing the water in a water-alcohol mixture in an adsorption tower; a water desorption step for subsequently introducing alcohol and obtaining water-containing alcohol; and a membrane separation step for introducing the water-containing alcohol into a membrane separation apparatus provided with a membrane composite that includes zeolite having an SiO2 / Al2O3 molar ratio of 5-15, and obtaining a second concentrated alcohol.

Description

technical field [0001] The present invention relates to a method for producing high-concentration alcohol, in particular to a method for producing high-concentration alcohol from a water-alcohol mixture. Moreover, it also relates to the manufacturing apparatus of this high-concentration alcohol. Background technique [0002] In the case of removing only water from a mixture of organic compounds such as alcohols, ketones, ethers, and water, the mixture of water and organic compounds becomes an azeotropic mixture with the lowest boiling point, and it is difficult to obtain a high-concentration mixture only by ordinary rectification. purify organic compounds. [0003] Therefore, as a method of extracting only the organic compound from a mixture of the organic compound and water at a high concentration, the following method has been proposed. Swing Absorption, hereinafter also simply referred to as "PSA") removes residual moisture (see Patent Document 1). [0004] In addition...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C29/76B01D71/02C07C31/08
CPCB01D3/005B01D3/145B01D67/0051B01D2311/04B01D2323/12C07C29/76B01D61/362B01D71/0281C07C31/04C07C31/08B01D2311/2626B01D2311/2669B01D17/0202
Inventor 前多一秀山崎幸一垣内博行田原岳史武胁隆彦
Owner MITSUBISHI RAYON CO LTD
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