CN113668002B - Method for preparing acetone by using formic acid - Google Patents
Method for preparing acetone by using formic acid Download PDFInfo
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- CN113668002B CN113668002B CN202110930397.4A CN202110930397A CN113668002B CN 113668002 B CN113668002 B CN 113668002B CN 202110930397 A CN202110930397 A CN 202110930397A CN 113668002 B CN113668002 B CN 113668002B
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B3/00—Electrolytic production of organic compounds
- C25B3/01—Products
- C25B3/07—Oxygen containing compounds
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B3/00—Electrolytic production of organic compounds
- C25B3/20—Processes
- C25B3/25—Reduction
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- Chemical Kinetics & Catalysis (AREA)
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- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
The invention discloses a method for preparing acetone by formic acid, which is 0.1-0.7 mol.L ‑1 Formic acid solution as electrolyte, metal lead sheet as cathode, inert material as anode, inThe cathode electrolytic voltage relative to the saturated calomel electrode is-1.4 to-1.7V vs.SCE Carrying out electrolysis; the method electrochemically reduces formic acid into acetone and ethanol, has the characteristics of simple equipment, small occupied area, simple process, convenient operation and the like, and has better theoretical and practical significance in preparing C3 organic matters from C1 organic matters.
Description
Technical Field
The invention relates to the technical field of organic chemical preparation, in particular to an electrochemical method for preparing acetone by formic acid.
Background
Formic acid, also known as formic acid, has the molecular formula HCOOH. Formic acid is colorless and smelly liquid, is an important basic chemical raw material, is an intermediate of chemical reaction and a renewable energy carrier, and is widely applied to industries such as pesticides, leather, dyes, medicines, rubber and the like. Formic acid is a C1 organic substance, the preparation method is relatively simple and easy, and the industrial preparation mainly comprises a sodium formate method, a methanol oxo synthesis method (also called a methyl formate method), a formamide method and the like.
Acetone, also known as dimethyl ketone, of the formula CH 3 COCH 3 The simplest saturated ketone is a colorless transparent liquid with a special pungent smell. It is easily dissolved in water and organic solvents such as methanol, ethanol, ether, chloroform, pyridine, etc., and is flammable, volatile and active in chemical property. Acetone is a C3 organic matter, is an important organic synthetic raw material, is used for producing epoxy resin, polycarbonate, organic glass, medicines, pesticides and the like, is an important raw material for producing acetic anhydride, diacetone alcohol, chloroform, iodoform, epoxy resin, polyisoprene rubber, methyl methacrylate and the like, and is also an excellent solvent, a diluent, a cleaning agent, an extracting agent and the like. The production method of acetone mainly comprises a cumene method, an isopropanol method, a fermentation method, an acetylene hydration method, a propylene direct oxidation method and the like, and at present, the industrial production of acetone mainly comprises the cumene method.
The electrochemical method has the advantages of simple equipment, small occupied area, normal operation at room temperature, convenient operation, changeable production scale, few byproducts, high product selectivity and the like, and is widely applied to organic chemical industry, but at present, no method for preparing acetone by the electrochemical method by taking formic acid as a substrate reactant exists.
Disclosure of Invention
In order to solve the defects in the prior art, the inventor provides an electrochemical method for preparing acetone by formic acid, and the electrochemical method has the characteristics of simple process, convenient operation and high selectivity of acetone and ethanol products.
Specifically, the invention provides a method for preparing acetone by using formic acid, which takes the formic acid as a substrate reactant and prepares the acetone by an electrochemical method, the formic acid is electrochemically reduced into acetone and/or ethanol, and the reaction generated by a cathode is as follows:
3HCOOH+10H + +10e - →CH 3 COCH 3 +5H 2 O。
in the range of 0.1 to 0.7 mol.L -1 The formic acid solution is taken as electrolyte, the metal lead sheet is taken as cathode, the inert material is taken as anode, and the cathode electrolysis voltage relative to the saturated calomel electrode is-1.4 to-1.7V vs.SCE Electrolysis is carried out. Wherein, the sizes of the cathode and the anode are determined according to actual requirements.
Further, the inert material is a metal platinum sheet or a graphite plate.
The invention provides a method for preparing acetone by an electrochemical method by taking formic acid as a substrate reactant, which electrochemically reduces the formic acid into acetone and ethanol, and every 3mol of formic acid can react to generate 1mol of acetone, so that the method has the advantages of simple process, convenient operation and small occupied area, and has better theoretical and practical significance in the aspect of preparing C3 organic matters from C1 organic matters.
Detailed Description
The present invention will be described in further detail by way of examples.
Example 1
0.1 mol.L is added into a 150mL electrolytic cell -1 100mL of HCOOH solution, a lead sheet with the thickness of 3cm multiplied by 4cm is taken as a cathode, a platinum sheet with the thickness of 3cm multiplied by 4cm is taken as an anode, a saturated calomel electrode is taken as a reference electrode, and the electrolytic voltage at the cathode is minus 1.6V vs.SCE After electrolysis for 10 hours, the faradic efficiency of the product acetone is 5.47 percent, and no byproduct ethanol exists.
Example 2
0.3 mol.L is added into a 150mL electrolytic cell -1 HCOOH solution100mL of the solution, 3cm × 4cm lead sheet as a cathode, 3cm × 4cm platinum sheet as an anode, saturated calomel electrode as a reference electrode, and electrolytic voltage of-1.6V at the cathode vs.SCE After electrolysis for 10 hours, the faradaic efficiency of the acetone product is 9.60 percent, and the faradaic efficiency of the ethanol byproduct is 0.90 percent.
Example 3
0.7 mol.L is added into a 150mL electrolytic cell -1 100mL of HCOOH solution, a lead sheet of 3cm × 4cm as a cathode, a platinum sheet of 3cm × 4cm as an anode, and a saturated calomel electrode as a reference electrode. Electrolytic voltage at cathode is-1.6V vs.SCE After electrolysis for 10 hours, the faradaic efficiency of the acetone product is 2.18 percent, and the faradaic efficiency of the ethanol byproduct is 2.12 percent.
Example 4
0.3 mol.L is added into a 150mL electrolytic cell -1 100mL of HCOOH solution, a lead sheet of 3cm × 4cm as a cathode, a platinum sheet of 3cm × 4cm as an anode, and a saturated calomel electrode as a reference electrode. Electrolytic voltage at cathode-1.4V vs.SCE After 10 hours of electrolysis, the faradaic efficiency of the product acetone is 4.77 percent, and the faradaic efficiency of the byproduct ethanol is 1.80 percent.
Example 5
0.3 mol.L is added into a 150mL electrolytic cell -1 100mL of HCOOH solution, a lead sheet of 3cm × 4cm as a cathode, a platinum sheet of 3cm × 4cm as an anode, and a saturated calomel electrode as a reference electrode. Electrolytic voltage at cathode-1.7V vs.SCE After 10 hours of electrolysis, the faradaic efficiency of the product acetone is 2.55 percent, and the faradaic efficiency of the byproduct ethanol is 0.18 percent.
Example 6
0.3 mol.L is added into a 150mL electrolytic cell -1 100mL of HCOOH solution, a lead sheet of 3cm × 4cm as a cathode, a platinum sheet of 3cm × 4cm as an anode, and a saturated calomel electrode as a reference electrode. Electrolytic voltage at cathode-1.6V vs.SCE After 7 hours of electrolysis, the faradaic efficiency of the product acetone is 7.36 percent, and the faradaic efficiency of the byproduct ethanol is 2.74 percent.
Claims (2)
1. A process for preparing acetone from formic acid features that the solution is prepared from 0.1-0.7 mol of 8729L -1 The formic acid solution is taken as electrolyte, the metal lead sheet is taken as cathode, the inert material is taken as anode, and the cathode electrolysis voltage relative to the saturated calomel electrode is-1.4 to-1.7V vs.SCE The electrolysis is carried out to electrochemically reduce formic acid to acetone, and the reaction at the cathode is as follows:
3HCOOH+10H + +10e - →CH 3 COCH 3 +5H 2 O。
2. the method of claim 1, wherein the inert material is a metallic platinum sheet or a graphite plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110930397.4A CN113668002B (en) | 2021-08-13 | 2021-08-13 | Method for preparing acetone by using formic acid |
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| CN202110930397.4A CN113668002B (en) | 2021-08-13 | 2021-08-13 | Method for preparing acetone by using formic acid |
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| CN113668002A CN113668002A (en) | 2021-11-19 |
| CN113668002B true CN113668002B (en) | 2023-04-11 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP6332732B2 (en) * | 2014-02-07 | 2018-05-30 | 日立化成株式会社 | Electrode, electrode manufacturing method, electrochemical reduction method, and electrochemical reduction product manufacturing method |
| CN106498437B (en) * | 2015-09-07 | 2019-06-11 | 中国科学院大连化学物理研究所 | A kind of Carbon dioxide electrochemical reduction electrode preparation method |
| CN111254456B (en) * | 2020-03-31 | 2021-04-09 | 青岛科技大学 | Electrochemical synthesis method of 2-nitro-4-methylsulfonylbenzoic acid |
| CN112760674B (en) * | 2020-12-24 | 2022-07-22 | 山东师范大学 | System and method for synthesizing ammonia and acetone in one step by electrochemical reduction at normal temperature and normal pressure |
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