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Method for electrochemically synthesizing isocaprylic acid metal salt

A technology of isooctanoic acid and metal salts, applied in the electrolysis process, electrolysis components, electrolysis organic production and other directions, can solve the problems of generating more waste water, polluting the environment, and large water consumption, and achieving cost reduction, green environmental protection cost, and low voltage. Effect

Inactive Publication Date: 2017-05-31
CENT SOUTH UNIV
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  • Claims
  • Application Information

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Problems solved by technology

[0008] Aiming at the disadvantages of large water consumption, large amount of waste water and environmental pollution in the saponification reaction in the synthesis of isooctanoate at present, the purpose of the present invention is to provide a kind of electrochemically synthesized iso-octanoate with no waste water and waste liquid, simple steps and low energy consumption. octanoic acid metal salt method

Method used

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  • Method for electrochemically synthesizing isocaprylic acid metal salt

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Effect test

Embodiment 1

[0034] Take 700mL of aqueous solution, 0.2mol of sodium hydroxide, 0.2mol of sodium chloride, and 300mL of isooctanoic acid, mix and stir, and heat up to 95°C. Two nickel plates are used as cathode and anode respectively, with an area of ​​8cm*9cm and a distance of 10cm. 250A / m 2 , Tank voltage 2.8 ~ 3.5V, every 60min to change the direct current direction of cathode and anode, scraper. After 25 hours, the electrolytic mixture was separated, and the lower oil phase was the product nickel isooctanoate, which was detected by Avatar 360 infrared spectrometer. figure 1 .

Embodiment 2

[0036] Take 700mL of aqueous solution, 0.1mol of sodium hydroxide, 1.0mol of sodium chloride, and 100mL of isooctanoic acid, mix and stir, heat up to 70°C, use two iron plates as the cathode and anode, the area is 8cm*9cm, the pole distance is 4cm, and the current density is 150A / m 2 , Tank voltage 1.5 ~ 2.0V, every 20min to change the negative and positive direct current direction, scraper. After 10 hours, the electrolytic mixture was separated, and the lower oil phase was the product iron isooctanoate.

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Abstract

The invention discloses a method for electrochemically synthesizing isocaprylic acid metal salt. The method comprises the following steps: respectively taking two metal plates of the same type as a negative electrode and a positive electrode, taking an isocaprylic acid-containing alkaline electrolyte solution as electrolyte, and feeding direct current for electrolysis; and after the electrolysis is completed, carrying out liquid separation on an electrolytic mixed solution, wherein a lower-layer oil phase which is an isocaprylic acid metal salt product and an upper-layer liquid phase which is electrolyte are recycled for repeated use. According to the method disclosed by the invention, the steps are simple, and the electrolyte can be recycled; no saponification is needed, and no waste water is produced, so that the method goes green and is safe and environmentally-friendly; and the product is easy and convenient to separate, the tank voltage is low, the energy consumption is low, and industrial production is facilitated.

Description

technical field [0001] The invention relates to a method for synthesizing metal isooctanoate, in particular to a method for electrochemically synthesizing metal isooctanoate, which belongs to the field of synthesis of metal isooctanoate. Background technique [0002] Isooctanoate, compared with traditional naphthenate driers, it has the advantages of good solubility, less dosage, high purity, light color, light smell, low viscosity, etc., and is widely used in various coatings Drier, drier of ink, catalyst for hydrogenation and additive of lubricating oil, can also be used as grinding dispersant, ultraviolet light absorber, etc. [0003] At present, there are usually three methods for producing isooctanoate. [0004] Method 1: use isooctanoic acid and liquid alkali to saponify to produce sodium isooctanoate, and then use metal sulfate solution to react with sodium isooctanoate to obtain liquid isooctanoate. [0005] Method 2: react metal with nitric acid to produce nitrate...

Claims

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Application Information

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IPC IPC(8): C25B3/12C25B3/13
CPCC25B3/13
Inventor 杨声海吴彦增陈永明王长红孙彦伟何静唐朝波杨建广
Owner CENT SOUTH UNIV