What are the production methods for butenoxime, and what is the proper storage method?

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There are several methods for producing butenoxime: (1) catalytic hydrogenation of 2-nitrobutane； This method produces butenoxime. Since the raw material must be obtained through a nitration reaction, there is a large amount of pollutants such as wastewater and exhaust gas, making it unsuitable for industrial production. (2) Electrochemical method ； In the presence of a nitrite salt solution, with Zn used as the electrode and CO continuously introduced under the application of an electric current, the current efficiency was only 40%. (3) Oxime exchange method ； In the presence of organic acids such as p-sulfonic acid, propionoxime reacts with butyronoxime to yield propionoxime and butyronoxime at 55–60 degrees Celsius for 10 hours. (4) Hydrated nitrile method ； Under the catalysis of a base, butylhydrazine reacts with hydrazine to form a hydrazone first; this hydrazone is then hydrolyzed under alkaline conditions to yield the oxime. (5) Hydroxylamine method ； The method of preparing butenoloxime by reacting butene with hydroxylamine hydrochloride or hydroxylamine sulfate is currently the main route for its synthesis. (6) Ammonia oxidation method: Generally, TS-1 is used as a catalyst, butane is used as the raw material, and hydrogen peroxide and ammonia water are added dropwise to obtain the product. Storage method: 1. Store in a cool and well-ventilated warehouse. Keep away from sources of fire and heat. Keep the container sealed. It should be stored separately from oxidizers; mixed storage is strictly prohibited. 2. Equip with fire-fighting equipment of appropriate types and quantities. The storage area should be equipped with emergency response equipment for leaks and appropriate containment materials.