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A quaternary ammonium salt suitable for flotation

A technology of quaternary ammonium salts and intermediates, applied in the field of chemical synthesis, which can solve the problems of large dosage, high cost, and application limitations of quaternary ammonium salts, and achieve strong collection performance and high applicability

Active Publication Date: 2021-12-31
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] But, along with the continuous deepening of research, its report also constantly appears, and the disadvantages such as using too much dosage, higher cost also show up slowly, and this has caused the application of quaternary ammonium salt to be restricted in large-scale flotation. restricted

Method used

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  • A quaternary ammonium salt suitable for flotation
  • A quaternary ammonium salt suitable for flotation
  • A quaternary ammonium salt suitable for flotation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Dissolve 4.7786g of trimethylamine hydrochloride in 18.18g of absolute ethanol, drain it with a glass rod, and pour it into a 25mL three-neck flask; adjust the temperature of the water bath to 30°C; weigh 4.626g of epichlorohydrin, and pour it into a constant pressure In the dropping funnel, slowly add dropwise at a rate of 0.3ml / min; react for 0.5 hours, cool for 2.5 hours, the reactant in the three-necked flask turns into white crystals, and Intermediate A is obtained.

[0030] After the product in the first step is crystallized, add 13.15g of ethanol to the three-necked flask; adjust the temperature of the water bath to 75°C; The solution was poured into a constant pressure dropping funnel, and slowly dropped into a three-necked beaker at a rate of 0.5ml / min; reacted for 4.5h to obtain intermediate B.

[0031] Distill at 90°C under normal pressure to remove ethanol to obtain a quaternary ammonium salt suitable for flotation (2-hydroxy---N1, N2, N3, N3-pentamethyl-N3-...

Embodiment 2

[0033] Dissolve 4.7786g of trimethylamine hydrochloride in 18.18g of absolute ethanol, drain it with a glass rod, and pour it into a 25mL three-neck flask; adjust the temperature of the water bath to 35°C; weigh 4.626g of epichlorohydrin, and pour it into a constant pressure In the dropping funnel, slowly add dropwise, 0.4ml / min; react for 1 hour, cool for 3 hours, the reactant in the three-necked flask turns into white crystals, and Intermediate A is obtained.

[0034] After the product in the first step is crystallized, add 13.15g of ethanol to the three-necked flask; adjust the temperature of the water bath to 80°C; The solution was poured into a constant pressure dropping funnel, and slowly dropped into a three-necked beaker at a rate of 0.7ml / min; reacted for 5 hours to obtain intermediate B.

[0035] Distill at 95°C under normal pressure to remove ethanol to obtain a quaternary ammonium salt suitable for flotation (2-hydroxy---N1, N2, N3, N3-pentamethyl-N3--tetradecylpro...

Embodiment 3

[0037] Dissolve 4.7786g of trimethylamine hydrochloride in 18.18g of absolute ethanol, drain it with a glass rod, and pour it into a 25mL three-neck flask; adjust the temperature of the water bath to 40°C; weigh 4.626g of epichlorohydrin, and pour it into a constant pressure In the dropping funnel, slowly add dropwise, 0.5ml / min; react for 1.5 hours, cool for 3.5 hours, the reactant in the three-necked flask turns into white crystals, and intermediate A is obtained.

[0038] After the product in the first step is crystallized, add 13.15g of ethanol to the three-necked flask; adjust the temperature of the water bath to 85°C; mix the mixed 13.476g of N,N-dimethyldodecylamine and 6.5854g of absolute The solution was poured into a constant pressure dropping funnel, and slowly dropped into a three-necked beaker at a rate of 0.9ml / min; reacted for 5.5h to obtain intermediate B.

[0039] Distill at 100°C under normal pressure to remove ethanol to obtain a quaternary ammonium salt sui...

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Abstract

The invention discloses a quaternary ammonium salt suitable for flotation. This kind of quaternary ammonium salt has stronger hydrophobicity, and then has stronger collecting performance; Because quaternary ammonium salt of the present invention has two quaternary ammonium groups, alkalescence is stronger, so in a wider pH range, still keep With a higher concentration of cations, it has higher applicability under weak acid and weak base conditions.

Description

technical field [0001] The invention relates to the technical field of chemical synthesis, in particular to a quaternary ammonium salt suitable for flotation. Background technique [0002] The vast majority of cationic collectors are nitrogen-containing organic compounds, mainly primary, secondary, tertiary amine salts and quaternary ammonium salts, and only a very small part are organic compounds containing sulfur or phosphorus. Compared with anionic collectors, cationic collectors are often used in the reverse flotation desilication of ores such as iron ore and phosphate rock because of their resistance to low temperature and hard water. However, cationic collectors (the vast majority of amine cationic collectors) have always had the defects of sticky foam, which leads to difficulties in foam transportation; high unit price of chemicals, and high cost of beneficiation chemicals. [0003] At present, due to its special properties, quaternary ammonium salts have been paid m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/01B03D101/02
CPCB03D1/011B03D2201/02
Inventor 翁孝卿李东郎李洪强周葵戈武张峻
Owner WUHAN INSTITUTE OF TECHNOLOGY
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