Chromium fog inhibitor and preparation method thereof

A technology of chromium mist inhibitor and solvent, which is applied in the field of chromium mist inhibitor and its preparation, to achieve the effect of low harm and easy decomposition

Inactive Publication Date: 2013-06-05
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This not only wastes chromic acid, but also pollutes the environment and endangers human health

Method used

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  • Chromium fog inhibitor and preparation method thereof
  • Chromium fog inhibitor and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0014] Preparation of sodium N-perfluorobutylsulfonyl-(N-perfluorohexylsulfonyl)imide sulfonate: take 1 mol of N-perfluorobutylsulfonyl-(N-perfluorohexylsulfonyl)imide Into the reactor, add an appropriate amount of solvent acetone, heat to dissolve under magnetic stirring, the temperature is controlled at 50 ° C, and then slowly add 2 mol chlorosulfonic acid dropwise after it is completely dissolved, and then add 2 mol / L NaOH dropwise after one hour of reaction Aqueous solution, react for 1 hour, then rotate the reactant to remove solvent and water, then add absolute ethanol to remove N-perfluorobutylsulfonyl-(N-perfluorohexylsulfonyl) iminesulfonic acid under full stirring The sodium was dissolved, and then the sodium chloride was removed by suction filtration, and rotary evaporation was performed to obtain the product sodium N-perfluorobutylsulfonyl-(N-perfluorohexylsulfonyl)imidesulfonate.

[0015] It can be determined that its molecular weight is 681 through the MS figure ...

Embodiment 2

[0019] Preparation of sodium N-perfluorohexylsulfonyl-(N-perfluorohexylsulfonyl)imide sulfonate: Take 1 mol of N-perfluorohexylsulfonyl-(N-perfluorohexylsulfonyl)imide into the reaction Add an appropriate amount of solvent acetone to the container, heat to dissolve under magnetic stirring, and control the temperature at 50°C. After it is completely dissolved, slowly add 1 mol of chlorosulfonic acid, and then add 2 mol / L NaOH aqueous solution dropwise after one hour of reaction. React for 1 hour, then rotate the reactant to remove the solvent and water, then add absolute ethanol to remove N-perfluorohexylsulfonyl-(N-perfluorohexylsulfonyl) imidesulfonate sodium dissolved under thorough stirring, Afterwards, the sodium chloride was removed by suction filtration, and rotary steaming was performed to obtain the product sodium N-perfluorohexylsulfonyl-(N-perfluorohexylsulfonyl)imidesulfonate.

[0020] Preparation of N-perfluorohexylsulfonyl-(N-perfluorohexylsulfonyl)imide: Take 1 m...

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Abstract

The invention discloses a chromium fog inhibitor, namely N-perfluorosulfonyl-(N-perfluorohexylsulfonyl) amine sulfonate, and further discloses a preparation method of the chromium fog inhibitor. According to the preparation method, N-perfluorosulfonyl-(N-perfluorohexylsulfonyl) amine reacts with chlorosulfonic acid and alkaline aqueous liquor to prepare N-perfluorosulfonyl-(N-perfluorohexylsulfonyl) amine sulfonate. Surface tension of the chromium fog inhibitor reaches the standard of the chromium fog inhibitor, and the fog inhibiting effect of the chromium fog inhibitor provided by the invention is equivalent to that of chromium fog inhibitors available in market, so that the chromium fog inhibitor provided by the invention can be used for replacing perfluorooctane sulfonate and salt (PFOS) of perfluorooctane sulfonate, as well as perfluorooctane sulfonate fluoride (PFOSF).

Description

technical field [0001] The invention relates to a chromium mist inhibitor and a preparation method thereof. Background technique [0002] In the chromium electroplating process, in addition to reducing metal chromium on the cathode, a large amount of hydrogen is precipitated at the same time, and a large amount of oxygen is precipitated at the anode. The hydrogen and oxygen precipitated from the cathode and anode generate a large number of bubbles, and at the same time, chromic acid particles escape to form chromium mist. . This not only wastes chromic acid, but also pollutes the environment and endangers personal health. Traditionally, the method of suppressing chrome mist spillage is to add surfactants-chromium mist inhibitors, such as perfluorooctanesulfonic acid and its salts (PFOS), perfluorooctanesulfonyl fluoride (PFOSF) in the chromium plating bath , this chromium mist inhibitor can form a stable foam layer on the surface of the chrome plating solution to prevent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C311/48C07C303/40C25D21/04
Inventor 林安叶慧明龙光斗古丽米热.加帕汪的华朱华毛旭辉肖巍
Owner WUHAN UNIV
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