Apparatus and method for producing aminoanisole by reduction of sodium hydrosulfide

A technology of aminoanisole and sodium hydrosulfide, which is applied in chemical instruments and methods, preparation of organic compounds, preparation of aminohydroxyl compounds, etc., can solve the problems of low production capacity, high production cost, and high labor intensity of the intermittent reduction device , to achieve the effects of strengthening direct mechanical shearing, high production efficiency, and improving mixing efficiency

Active Publication Date: 2018-07-06
金塔县海拓化工有限公司
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] There are manufacturers in China that use the sodium hydrogen sulfide reduction process to produce aminoanisole, but they use intermittent reduction devices for production, which have low production capacity, high labor intensity and high production costs.

Method used

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  • Apparatus and method for producing aminoanisole by reduction of sodium hydrosulfide
  • Apparatus and method for producing aminoanisole by reduction of sodium hydrosulfide
  • Apparatus and method for producing aminoanisole by reduction of sodium hydrosulfide

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Embodiment Construction

[0025] A device and method for reducing sodium bisulfide to produce aminoanisole, comprising nitroanisole storage tank 1, sodium bisulfide storage tank 2, liquid caustic soda storage tank 3, primary reduction kettle 4, and secondary reduction kettle 5 , three-stage reduction kettle 6, discharge liquid level control tank 7, reducing liquid cooler 8, reducing liquid separator 9, aminoanisole storage tank 10, waste water storage tank 11, said primary reduction kettle 4, secondary The reduction kettle 5 and the three-stage reduction kettle 6 have the same structure. The first-stage reduction kettle 4 includes a housing 41, a transmission device 42, a guide tube 43, a stirring blade 44, a stirring shaft 45, and a heat exchange coil 46. The transmission The device 42 is fixed on the top of the housing 41 through a bracket, the guide tube 43 is suspended in the housing 41 through the bracket, the inner wall of the guide tube 43 is provided with a radial baffle 47, and the stirring bla...

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Abstract

The invention discloses a device and a method of aminoanisole production by sodium hydrosulfide reduction. The device comprises a nitroanisole storage tank, a sodium hydrosulfide storage tank, an alkaline liquor storage tank, a primary reduction kettle, a secondary reduction kettle, a tertiary reduction kettle, a discharge liquid level control tank, a reduction solution cooler, a reduction solution separator, an aminoanisole storage tank and a wastewater storage tank, wherein the primary reduction kettle, the secondary reduction kettle and the tertiary reduction kettle are the same in structure. The continuous production is achieved; the automation degree is high; the production efficiency can be improved; the labor intensity of workers is reduced; the production cost is lowered; the safety performance of the device is improved; and the intrinsic safety is achieved.

Description

technical field [0001] The invention belongs to the field of chemical production, and in particular relates to a device and method for reducing sodium hydrosulfide to produce aminoanisole. Background technique [0002] Aminoanisole (mainly o-aminoanisole or p-aminoanisole) is an important dye, spice and pharmaceutical intermediate. At present, the domestic production of aminoanisole mainly adopts three production processes of alkali sulfide reduction, sodium hydrosulfide reduction and catalytic hydrogenation reduction. Using sodium sulfide reduction, the amount of waste water and waste solids is large, and the production cost is high. The use of catalytic hydrogenation reduction process requires hydrogen resources, high requirements for equipment manufacturing, and large project investment. However, the use of sodium hydrogen sulfide reduction process has small waste water and waste solids. , and the domestic by-product sodium hydrosulfide is rich in resources and low in pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C213/02C07C217/84
CPCC07C213/02C07C217/84
Inventor 姚春红于建民王苏广
Owner 金塔县海拓化工有限公司
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