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Process for short chain alkane synthesis while maintaining faradaic efficiency

A technology of alkanes and electrodes, applied in the field of synthesizing short-chain alkanes while maintaining Faradaic efficiency

Pending Publication Date: 2021-08-24
GRIDTHINK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The '299 patent shows that when the Kolbe synthesis of dimethyl sebacate is performed at 16 bar (abs.), the conversion

Method used

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  • Process for short chain alkane synthesis while maintaining faradaic efficiency
  • Process for short chain alkane synthesis while maintaining faradaic efficiency
  • Process for short chain alkane synthesis while maintaining faradaic efficiency

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0026] This example provides figure 1 and the results in Examples 2-4 for the test Kolbe synthesis setup. The pressure vessel consists of 2.5" pipe fittings made of 150 grade 316 stainless steel and caps of the same material and pressure rating. A tight fitting thin polyethylene sleeve is placed inside the pipe and serves as the electrolyte reservoir Pool. The total volume of the reservoir is 0.225 L. The Kolbe electrolytic cell is constructed of a cast acrylic plate with a hole drilled at the bottom as an inlet and a slot at the top to allow free convection through the electrode gap. Thickness is 1 mm and exposed surface area 2.61cm 2 The solid Pt plates were used as anode and cathode and were placed vertically with an inter-electrode spacing of 6.75 mm. The electrolytic cell is completely submerged in the electrolyte and is suspended in the middle of the depth of the electrolyte by hanging from its power cord. The upper cap houses the pressure gauge, outlet and power fee...

example 2

[0029] The pressure vessel and measuring equipment from Example 1 were used, but with 225 mL of fresh unused electrolyte. Set the back pressure regulator to 6 bar gauge and allow the electrolytic cell to purge until a steady state composition is reached. Flow rate and composition measurements enable the derivation of Faradaic efficiency.

example 3

[0031] The pressure vessel and measuring equipment from Example 1 were used, but with 225 mL of fresh unused electrolyte. Set the back pressure regulator to 10.5 bar gauge and allow the cell to purge until a steady state composition is reached. Flow rate and composition measurements enable the derivation of Faradaic efficiency.

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Abstract

There is disclosed a process for synthesis of a C2-8 alkane comprising: (a) providing an electrolyte formulation comprising from about 3N to about 6N C2-C5 carboxylic acid and from about 2M to about 4M alkali C2-C5 carboxylate, wherein the C2-C5 carboxylate and carboxylic acid have the same carbon alkyl length into a pressure vessel having an electrode cell or stack; (b) adding electrical current to the electrode cell or stack; (c) pressurizing the pressure vessel; and (d) recovering a gas stream from the pressure vessel comprising a C2-8 alkane, CO2 and H2. Preferably, the carboxylic acid is acetic acid and the alkane is ethane.

Description

technical field [0001] The present disclosure provides a method of synthesizing C2-8 alkanes comprising: (a) providing an electrolyte formulation comprising about 3N to about 6N C2 into a pressure vessel having an electrode electrolytic cell or stack. -C5 carboxylic acid and about 2M to about 4M alkali metal C2-C5 carboxylate, wherein said C2-C5 carboxylate and carboxylic acid have the same carbon alkyl length; (b) adding to said electrode electrolytic cell or stack (c) pressurizing the pressure vessel; and (d) recovering from the pressure vessel comprising C2-8 alkanes, CO 2 and H 2 airflow. Preferably, the carboxylic acid is acetic acid and the alkane is ethane. [0002] Cross References to Related Applications [0003] This application claims priority to U.S. Provisional Patent Application 62 / 792,324, filed January 14, 2019. Background technique [0004] In the field of electrochemical synthesis, the decarboxylation dimerization reaction of carboxylic acid is called...

Claims

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Application Information

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IPC IPC(8): C25B3/03C25B3/29C25B9/17C25B9/05
CPCC25B11/04C25B3/29C25B9/17C25B9/73C25B3/03C25B11/042
Inventor J·奥马利D·蒙哥马利
Owner GRIDTHINK INC