Method for synthesizing hydroxylamine hydrochloride from nitromethane and hydrochloric acid through phase transfer

A technology of nitromethane and hydroxylamine hydrochloride, applied in chemical instruments and methods, hydroxylamine, nitrogen and non-metallic compounds, etc., can solve the problems of low conversion rate and long reaction time, and achieve low production cost, fast reaction speed, and yield high rate effect

CN106946235AActive Publication Date: 2017-07-14BEIJING CHEM REACTION ENG SCI & TECH CO LTD

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Patent Information

Authority / Receiving Office: CN · China
Patent Type: Applications(China)
Current Assignee / Owner: BEIJING CHEM REACTION ENG SCI & TECH CO LTD
Publication Date: 2017-07-14

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Abstract

The invention relates to a method for synthesizing hydroxylamine hydrochloride from nitromethane and hydrochloric acid through phase transfer. The method comprises the following steps: 1, carrying out a synthesis reaction: adding raw materials which are nitromethane, hydrochloric acid and water into a batch reactor with a stirrer, stirring and mixing the raw materials, adding an extractant, heating the reactor to a reaction temperature, and carrying out the reaction for a period of time to obtain a reaction product; and 2, separating the product: standing the reaction product to layer the reaction product, conveying the obtained water phase to a concentration tower, carrying out crystallizing, filtering, washing and drying on the obtained concentrate to obtain the hydroxylamine hydrochloride, recycling hydrochloric acid and water obtained in the concentration tower, conveying the obtained oil phase to a rectifying tower, and carrying out separation to obtain the extract and nitromethane which can be recycled and formic acid as a byproduct.

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Description

technical field

[0001] The invention belongs to the technical field of fine chemicals, and relates to a method for synthesizing hydroxylamine hydrochloride by phase transfer from nitromethane and hydrochloric acid. Background technique

[0002] Hydroxylamine hydrochloride is a widely used organic chemical raw material and organic synthesis intermediate. It is used in the preparation of oximes in organic synthesis, and is also used as a raw material for the synthesis of anticancer drugs (such as hydroxyurea), sulfonamides (such as sulfamethoxazole) and pesticides (such as methomyl); used as a depolarizer in electroanalysis; In the synthetic rubber industry, it is used as a non-coloring short-term stopper; in the synthetic fuel industry, it is used to prepare isatin intermediates; in the oil industry, it is used as an anti-aging agent and antioxidant for fatty acids and soaps; in analytical chemistry, it is used to analyze formaldehyde, furfural, and camphor And the reducing ...

Claims

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