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Method for preparing hydrocarbons by electrolysis of mixed carboxylic acids

A technology for mixtures and hydrocarbons, applied in the field of electrocatalytic preparation of hydrocarbons, to achieve the effects of wide sources, short reaction cycle, and reduced energy consumption

Active Publication Date: 2021-01-15
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But using monocarboxylic acid R 1 -COOH and dicarboxylic acid HOOC-R 2 The mixture of -COOH is electrolyzed to obtain the general formula R 1 -R 2 -R 1 And other carbon chain growth hydrocarbons that do not conform to the Kolbe reaction law have not been reported

Method used

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  • Method for preparing hydrocarbons by electrolysis of mixed carboxylic acids

Examples

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Embodiment 1

[0023] Drugs: deionized water (18.2MΩ, Merck Milli-QAdvantageA10 ultrapure water system), the carboxylic acid, potassium hydroxide, and potassium sulfate used were bought back and used directly without further purification.

[0024] Electrolytic cell: The electrolytic cell used in this reaction is 50mm 3 The screw port can be sealed without diaphragm Pikes glass electrolytic cell. The electrolysis system is a three-electrode system, in which a Pt sheet (1cm×1cm) is used as the working electrode, a Pt mesh (60 mesh, 1cm×1cm) is used as the counter electrode, and a Hg / HgO (1M KOH) electrode is used as the reference electrode.

[0025] Weigh 1.1g of adipic acid, 2.2g of n-octanoic acid and 15.0mm 3 2molcm -3 KOH aqueous solution, add to the beaker and mix in turn, then add ultrapure water to make the volume to 30mm -3 . Put the magnet into the beaker, turn on 600rpm and stir for 10min, then add it to the above electrolytic cell. Place the electrolytic cell in a water bath at...

Embodiment 2-15

[0029] Table 1 shows the composition and selectivity of the obtained products after the electrolytic reaction is carried out with different unit carboxylic acids and dicarboxylic acids as mixtures. Wherein Examples 1-8 and 10-15 use the same working electrode as Example 1, and the working electrode used in Example 9 is a graphite electrode. Others are the same as embodiment 1.

[0030] Table 1 Examples 1-15

[0031]

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Abstract

The invention discloses a preparation method of hydrocarbon substances. The method comprises the step of performing electrolysis by using inert electrodes as a working electrode and a counter electrode and a solution obtained by dissolving a mixture of a monobasic aliphatic acid and a dibasic aliphatic acid into a protic solvent or an aprotic solvent as an electrolyte at operating voltage of not less than 3.0 V to obtain the hydrocarbon substances, wherein the structural formula of the monobasic aliphatic acid is R<1>-COOH, the structural formula of the dicarboxylic acid is HOOC-R<2>-COOH, thehydrocarbon products comprise a hydrocarbon product having a structural formula of R<1>-(R<2>)n-R<1> and / or a hydrocarbon product having a double bond, branched chains or a carbon ring structure, andn is a natural number. The method provided by the invention adopts an electrochemical method to prepare the hydrocarbons, the monobasic carboxylic acid and the dicarboxylic acid which are both renewable green raw materials, an aqueous solution system can be completely adopted, the obtained hydrocarbon products are naturally separated, and the products have high purity.

Description

technical field [0001] The invention belongs to the technical field of electrochemical synthesis, and in particular relates to an electrocatalytic preparation method of hydrocarbons with carbon chain growth. Background technique [0002] With the rapid growth of the global population, the continuous improvement of people's requirements for quality of life, the depletion of non-renewable fossils and the increasingly prominent environmental pollution problems, the research and development of renewable carbon-neutral chemical products is of great help to alleviate the oil crisis and improve the environment. Pollution situation, achieving sustainable development is of strategic significance [0003] In organic synthesis, the construction of carbon skeleton is an extremely important step, which involves the growth of carbon chains. The traditional carbon chain growth methods are mostly accompanied by the use of toxic and harmful reagents, or the carbon chain growth ability is we...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B3/00
CPCC25B3/00
Inventor 王庆法袁刚张香文王涖邹吉军刘国柱李国柱
Owner TIANJIN UNIV
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