A method for preparing 5-chlorofuranic acid
By using a copper-cobalt catalyst and oxidant in a strongly alkaline medium to oxidize 5-chlorofurfural, a high-yield 5-chlorofuric acid was prepared, solving the problems of inefficiency and environmental friendliness in existing preparation methods and realizing an environmentally friendly and low-cost preparation process.
CN117843596BActive Publication Date: 2026-05-26ZHONGKE GUOSHENG (HANGZHOU) TECH CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- ZHONGKE GUOSHENG (HANGZHOU) TECH CO LTD
- Filing Date
- 2023-12-20
- Publication Date
- 2026-05-26
AI Technical Summary
Technical Problem
Existing technologies for the preparation of 5-chlorofuranic acid are limited and inefficient, and often use organic solvents and heavy metal catalysts, which raise environmental and cost concerns.
Method used
5-Chlorofuraldehyde was oxidized in a strongly alkaline medium using a copper-cobalt catalyst and hydrogen peroxide or sodium hypochlorite solution, followed by acidification with hydrochloric acid, to prepare 5-chlorofuric acid in high yield, avoiding the use of organic solvents and heavy metal catalysts.
Benefits of technology
A high-yield preparation of 5-chlorofuranic acid was achieved. The process is simple, environmentally friendly, low-cost, and easy to operate.
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Smart Images
Figure HDA0004616736350000011
Abstract
This invention discloses a method for preparing 5-chlorofuronic acid, comprising the following steps: 1) preparing sodium hydroxide solution and 5-chlorofuraldehyde solution in two beakers respectively; 2) adding the sodium hydroxide solution prepared in step 1) to the beaker containing the 5-chlorofuraldehyde solution, and then stirring. After stirring evenly, adding a copper-cobalt catalyst, and then adding an oxidant solution dropwise while stirring. After the addition is complete, stirring is continued. After the reaction is complete, hydrochloric acid is added to adjust the pH value of the reaction system. When the pH value is 2-3.5, most of the solvent is removed by vacuum distillation, and a solid precipitates out. The reacted material is filtered to obtain the filtered solid, which is dried to obtain a light yellow solid, which is the 5-chlorofuronic acid to be prepared. The preparation process of this invention is simple, and the raw materials and solvents used are all green and environmentally friendly, and the yield of the prepared 5-chlorofuronic acid is high.
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