Process for aldehyde removal from alcohols by treatment with bisulphite

A technology of bisulfite and sodium bisulfite, applied in the field of purifying alcohol, can solve problems such as value reduction

Active Publication Date: 2020-05-15
SABIC GLOBAL TECH BV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the value of 2-ethylhexanol decreases over time, for example, only thro

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  • Process for aldehyde removal from alcohols by treatment with bisulphite
  • Process for aldehyde removal from alcohols by treatment with bisulphite
  • Process for aldehyde removal from alcohols by treatment with bisulphite

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Embodiment

[0048] As part of the disclosure of the present invention, specific examples are included below. The examples are for illustrative purposes only and are not intended to limit the invention. Those skilled in the art will readily recognize parameters that can be changed or modified to produce substantially the same results.

[0049] Example

[0050] (Purification of 2-ethylhexanol)

[0051]37 ml of a 2-ethylhexanol solution with 361.27 ppm of aldehyde was stirred with 0.5 g of sodium sulfite at room temperature (25° C.) for 1 hour. The mixture was filtered and analyzed for aldehydes by gas chromatography (GC). The sodium bisulfite treated sample had 35 ppm aldehyde, which corresponds to greater than 90% reduction of the aldehyde (see Table 1).

[0052] Table 1

[0053] Sample name Average concentration of aldehyde (ppm) Feed 361.27 processed sample 35.68

[0054] The results of this example demonstrate the effectiveness of the concept of using s...

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Abstract

A process of purifying alcohol produced in a process that includes the Oxo process is disclosed. Aldehyde from the Oxo process that remains with the alcohol is removed by a reaction with an alkali sulphite to produce an insoluble adduct and alcohol having a reduced amount of aldehyde mixed with it. The adduct is removed from the alcohol by filtration.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of priority to U.S. Provisional Patent Application No. 62 / 563,463, filed September 26, 2017, which is hereby incorporated by reference in its entirety. technical field [0003] The present invention generally relates to methods of purifying alcohols. More specifically, the invention relates to the purification of alcohols by treatment with bisulfite. Background technique [0004] Some alcohols are prepared by converting alkenes to their corresponding alcohols. In a process known as oxo, first, olefins are reacted with synthesis gas (carbon monoxide and hydrogen) to form aldehydes (hydroformylation reaction). Second, the aldehyde is subjected to an aldol condensation to form an aldol. Third, the aldols are hydrogenated to form alcohols. For example, 2-ethylhexanol is produced by hydroformylation of propylene to form n-butyraldehyde, aldol condensation of n-butyraldehyde to form hy...

Claims

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Application Information

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IPC IPC(8): C07C29/88C07C31/125
CPCC07C29/88C07C31/125C07C29/76
Inventor 优曼许·克里希纳·哈斯亚加尔瑞提什·南迪维诺德·S·尼尔索马克·保罗易卜拉欣·S·马洪-阿尔
Owner SABIC GLOBAL TECH BV
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