Method for recovering and preparing furanone acid from syn-2-methoxyimino-2-(2-furayl)-acetic acid-ammonia salt waste residue
The invention discloses a method for recovering and preparing furanone acid from syn-2-methoxyimino-2-(2-furayl)-acetic acid-ammonia salt waste residue. The technical points are that: 2-methoxyimino-2-(2-furyl)acetic acid is obtained by acidizing the syn-2-methoxyimino-2-(2-furayl)-acetic acid-ammon...
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Format: | Patent |
Sprache: | chi ; eng |
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Zusammenfassung: | The invention discloses a method for recovering and preparing furanone acid from syn-2-methoxyimino-2-(2-furayl)-acetic acid-ammonia salt waste residue. The technical points are that: 2-methoxyimino-2-(2-furyl)acetic acid is obtained by acidizing the syn-2-methoxyimino-2-(2-furayl)-acetic acid-ammonia salt waste residue; pH is kept between 1.0 and 2.0; an oxidation reaction is performed on the 2-methoxyimino-2-(2-furyl)acetic acid and sodium nitrite under the action of a catalyst to obtain the solution of the furanone acid; and the solution of the furanone acid can be directly used as a raw material for synthesizing syn-2-methoxyimino-2-(2-furayl)-acetic acid-ammonia salt. By the process, the 2-methoxyimino-2-(2-furyl)acetic acid in the syn-2-methoxyimino-2-(2-furayl)-acetic acid-ammonia salt waste residue can be recovered to prepare the furanone acid, so that a waste material is turned into treasure; therefore, the method not only reduces pollution, but also has very good economic benefit. |
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