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Preparation method of aliphatic diol

An aliphatic diol and cathode technology, which is applied in electrolysis process, electrolysis components, electrolysis organic production, etc., can solve the problems of high yield of aliphatic diol, inconvenient large-scale production, large discharge of three wastes, etc., and meet the equipment requirements Not high, reduce the production of metal ions, and reduce production costs

Active Publication Date: 2022-03-22
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In view of this, the main purpose of the present invention is to provide a new method for electrochemically preparing fatty diols, which solves the problem of long preparation routes and three waste discharges in existing production technologies Large and inconvenient for large-scale production, the use of conventional materials such as diene and CO2 reduces production costs, and at the same time has high current efficiency, high yield of aliphatic diols, and no need to use anode sacrificial electrode

Method used

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  • Preparation method of aliphatic diol
  • Preparation method of aliphatic diol

Examples

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Effect test

Embodiment 1

[0050] Cathode preparation method:

[0051] Polish the 2mm thick titanium substrate with 600, 800, and 1500 mesh sandpaper for 5 minutes in sequence, then put it into the polishing solution containing 15wt% HF and 25wt% nitric acid for 20 seconds, take it out, rinse it with deionized water for two minutes, and then put it Sonicate in ethanol for 5 minutes, take it out and dry it. Use the electrode as the anode and the graphite sheet as the cathode, and polarize for 30 minutes under constant potential conditions in 100ml of polarizing solution containing 0.5wt% HF and 0.15wt% TiCl 4 Ethylene glycol solution. Wherein, cathode electrode area: anode electrode area=4, above operation makes TiO 2 array of nanotubes.

[0052] After taking out the above electrode, put it in the electroplating solution containing 0.3M nickel sulfate, use the electrode as the cathode, and the platinum sheet as the anode, conduct constant current electroplating at room temperature for 30 minutes, and ...

Embodiment 2

[0056] Polish the 2mm thick zinc substrate with 600, 800, and 1000 mesh sandpaper for 5 minutes in sequence, then put it into the polishing solution containing 15wt% HF and 25wt% nitric acid for 10 seconds, take it out, rinse it with deionized water for two minutes, and then put it Sonicate in ethanol for 5 minutes, take it out and dry it. Use the electrode as the anode and the graphite sheet as the cathode, and polarize for 60 minutes under constant potential conditions in 100ml of polarizing solution containing 0.5wt% HF, 0.25wt% ZnCl 2 Ethanol solution, wherein, cathode electrode area: anode electrode area=4, above operation makes ZnO nanotube array.

[0057] After taking out the above electrode, put it in the electroplating solution containing 0.6M cobalt sulfate, use the electrode as the cathode, and the platinum sheet as the anode, conduct constant current electroplating at room temperature for 40 minutes, and the current size is 0.5A. After taking out the electrode, was...

Embodiment 3

[0060] Cathode preparation method:

[0061] Polish the 2mm thick titanium substrate with 600, 800, and 1500 mesh sandpaper for 5 minutes in sequence, then put it into the polishing solution containing 15wt% HF and 25wt% nitric acid for 20 seconds, take it out, rinse it with deionized water for two minutes, and then put it Sonicate in ethanol for 5 minutes, take it out and dry it. The electrode is used as an anode and polarized for 40 minutes under constant potential conditions in 100ml polarizing solution, which contains 0.5wt% HF, 0.15wt% TiCl 4 Ethylene glycol solution, the corresponding cathode is graphite sheet, wherein, cathode electrode area: anode electrode area=4, above operation makes TiO 2 array of nanotubes.

[0062] After taking out the above electrode, put it in the electroplating solution containing 0.5M copper sulfate, use the electrode as the cathode, and the platinum sheet as the anode, conduct constant current electroplating at room temperature for 30 minut...

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Abstract

The invention discloses a method for electrochemically preparing aliphatic diol, which comprises the following steps: adding a diene substance, an amine compound and carbon dioxide into an electrolytic tank, and carrying out electrocarboxylation-reduction cascade reaction on the diene substance and CO2 at a cathode to obtain the aliphatic diol. The invention provides a green and efficient method for preparing aliphatic diol, solves the problems of long preparation route, large output of three wastes and the like in the existing production technology, avoids the use of dangerous materials such as hydrogen, hydrogen peroxide and the like, and reduces the safety risk caused by the dangerous materials. According to the method, conventional materials such as diene and CO2 are used, the production cost is reduced, the technological process is simple, the requirement for equipment is not high, and the method is suitable for industrial production.

Description

technical field [0001] The invention relates to the field of organic electrochemical synthesis, in particular to a method for electrochemically preparing aliphatic diols. Background technique [0002] Aliphatic diols are an important class of chemical raw materials, such as 1,6-hexanediol, 1,10-decanediol, etc. 1,6-hexanediol is used to prepare high-performance TUP and polyurethane industries, 1,10 -Decanediol is an important pharmaceutical intermediate. [0003] At present, such substances are mainly prepared by esterification-hydrogenation of aliphatic diacids. The process is cumbersome and lengthy, and it also involves dangerous reactions such as catalytic hydrogenation. Some diacids such as suberic acid and sebacic acid are relatively expensive, resulting in The price of corresponding diol is also higher, which limits the large-scale application of diol. [0004] Patent CN201910583592 reports a method for the preparation of 1,6-hexanediol. The method uses concentrated ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B3/07C25B3/20
CPCC25B3/07C25B3/20
Inventor 杜旺明张静栾谨鑫朱梦瑶赵文娟王未振
Owner WANHUA CHEM GRP CO LTD
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