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A kind of chelating amphoteric collector, its preparation method and its composition with fatty acid

A collector and chelating type technology, which is applied in the field of chelating amphoteric collectors and their preparation, can solve the problems of high viscosity of flotation foam, reduce the types of reagents, and reduce the flotation temperature to achieve high selectivity, The effect of reducing the amount of use and increasing the collection capacity

Active Publication Date: 2021-02-19
鞍山市津翔工业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Publication number [CN101088623A] proposes an ether amine cationic collector, which can reduce the types of reagents and lower the flotation temperature, but has the disadvantages of high viscosity of flotation foam and sensitivity to ore slime

Method used

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  • A kind of chelating amphoteric collector, its preparation method and its composition with fatty acid
  • A kind of chelating amphoteric collector, its preparation method and its composition with fatty acid
  • A kind of chelating amphoteric collector, its preparation method and its composition with fatty acid

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preparation example Construction

[0026] The preparation method of the chelating type amphoteric collector provided by the invention is: p-aminophenol reacts with sodium ethylate to generate p-aminophenol sodium, then reacts with 1-chloroalkane to generate p-alkoxyaniline; protection of amine groups, generating 2,6-dinitro-4-alkoxyphenylacetamide under the action of nitric acid and sulfuric acid; acidic hydrolysis, diazotization under the conditions of sodium nitrite and sulfuric acid, copper powder and cyanide The diazo group is replaced by a cyano group under potassium, and acidic hydrolysis generates 2,6-dinitro-4-alkoxybenzoic acid; a nitro group is selectively reduced with sodium sulfide and ammonium chloride, diazotization reaction, acidic Hydrolyze to generate 2-hydroxy-6-nitro-4-alkoxybenzoic acid; reduce under the action of iron powder and hydrochloric acid to generate the target product 2-hydroxy-6-amino-4-alkoxybenzoic acid.

[0027] The present invention takes the synthetic method of following step...

Embodiment 1

[0036] Take a certain amount of sodium ethylate in a flask, add an equimolar amount of p-aminophenol, then add an equimolar amount of 1-chlorohexane, reflux for 2 hours, cool to room temperature, add an equimolar amount of acetic anhydride, and reflux for 1 hour , cooled, added mixed acid in batches, and reacted at 56°C to 59°C for 50 minutes. After cooling, pour the reaction mixture into a separatory funnel to separate the acid layer. Cool the organic layer with an ice-salt bath to 0°C-2°C, slowly drop into the cooled sodium nitrite solution, add copper powder and potassium cyanide, heat up to 67°C-68°C, stir for 2 hours, and then add a certain amount of dilute sulfuric acid and continued stirring for 2 hours. After cooling, the reaction mixture was poured into a separatory funnel, and the acid layer was separated. Add sodium sulfide and ammonium chloride to the organic layer respectively, raise the temperature to 83°C-85°C, and react for 2 hours under stirring. Cool in an ...

Embodiment 2

[0039] Take a certain amount of sodium ethylate in a flask, add an equimolar amount of p-aminophenol, then add an equimolar amount of 1-chlorodecane, reflux for 3 hours, cool to room temperature, add an equimolar amount of acetic anhydride, and reflux for 1 hour , cool, add mixed acid in batches, react at 58°C-60°C for 50min, after cooling, pour the reaction mixture into a separatory funnel, and separate the acid layer. Cool the organic layer with an ice-salt bath to 1°C-2°C, slowly drop into the cooled sodium nitrite solution, add copper powder and potassium cyanide, heat up to 68°C-70°C, stir for 2 hours, and then add a certain amount of dilute sulfuric acid, stirring was continued for 1 hour. After cooling, the reaction mixture was poured into a separatory funnel, and the acid layer was separated. Add sodium sulfide and ammonium chloride to the organic layer respectively, raise the temperature to 83°C-85°C, and react for 2 hours under stirring. Cool in an ice-salt bath to...

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Abstract

The invention discloses a chelating amphoteric collector and a preparation method thereof. The collector contains alkyl, ether, phenyl, hydroxyl, amine and carboxyl, the length of the alkyl is C 5 ~C 16 . The preparation method is that p-aminophenol reacts with sodium ethylate to generate p-aminophenol sodium, and then reacts with 1-chloroalkane to generate p-alkoxyaniline; under the action of nitric acid and sulfuric acid, it generates 2,6-dinitro-4 ‑Alkoxyphenylacetamide; diazotization, diazo group replaced by cyano group under copper powder and potassium cyanide, acidic hydrolysis to 2,6‑dinitro‑4‑alkoxybenzoic acid; with sodium sulfide Selective reduction of a nitro group with ammonium chloride, diazotization reaction, acidic hydrolysis to generate 2-hydroxy-6-nitro-4-alkoxybenzoic acid; reduction to generate the target product 2-hydroxy-6-amine ‑4‑Alkoxybenzoic acid. The chelating amphoteric collector has good collecting ability, selectivity and low temperature resistance, and can be combined with various fatty acids to form a composite collector.

Description

technical field [0001] The invention relates to a chelating type amphoteric collector and a preparation method thereof, belonging to the technical field of ore dressing agents. Background technique [0002] At present, there are fewer and fewer iron ores that are easy to select. Most iron ores are characterized by "lean, miscellaneous, and fine". It is difficult to obtain high iron concentrate grade and metal recovery rate at the same time by ordinary gravity separation and magnetic separation. . In order to adapt to changes in iron ore characteristics, the reverse flotation process is the main method to obtain higher-grade iron concentrate and metal recovery rate. The core content of this process is the reagent system, and the collector is the key to the reagent system. At present, most of the collectors used in lean iron ore are fatty acids and their modified compounds. The flotation temperature of these collectors is generally 30°C to 45°C, and boiler heating is often re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/01B03D101/02B03D103/04
CPCB03D1/01B03D2201/02B03D2203/04
Inventor 梅建庭杨威曹翠刘浩林
Owner 鞍山市津翔工业有限公司
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