Tin oxide forming composition

Patent metadata

Field	Value
Publication number	US-12515964-B2
Application number	US-202017608357-A
Country	US
Kind code	B2
Filing date	Sep 14, 2020
Priority date	Sep 26, 2019
Publication date	Jan 6, 2026
Grant date	Jan 6, 2026

Abstract

The present invention provides a tin oxide forming composition and a tin oxide forming method using the tin oxide forming composition. The tin oxide forming composition of the present invention is easy to manufacture and is capable of forming a tin oxide with a high yield.

First claim

The invention claimed is:

1 . A composition for an electrode in a chlor-alkali process, wherein the composition comprises:
a tin precursor; a platinum group precursor; sulfate ions; and a solvent, wherein a molar ratio of sulfate ions to tin (sulfate ions/tin) is 3 to 10, wherein a concentration of the sulfate ions in the composition is 0.01 M to 10 M, wherein a concentration of tin ions in the composition is 0.01 M to 10 M, and wherein the platinum group precursor is at least one compound selected from the group consisting of ruthenium hexafluoride (RuF 6 ), ruthenium (III) chloride (RuCl 3 ), ruthenium (III) chloride hydrate (RuCl 3 ·XH 2 O), ruthenium (III) nitrosyl chloride (Ru(NO)Cl 3 ), hexaammine ruthenium (III) Chloride (Ru(NH 3 ) 6 Cl 3 ), ruthenium (III) bromide (RuBr 3 ), ruthenium (III) bromide hydrate (RuBr 3 ·xH 2 O), ruthenium iodide (RuI 3 ), ruthenium acetate, iridium chloride hydrate (IrCl 3 ·xH 2 O), and hydrogen hexachloroiridate hexahydrate (H 2 IrCl 6 ·6H 2 O).

2 . The tin oxide forming composition of claim 1 , wherein the tin precursor is at least one selected from the group consisting of tin ions, tin halogenated compounds, tin alkoxide compounds, tin acetate, tin sulfate, and tin 2-ethylhexanoate.

3 . The tin oxide forming composition of claim 1 , wherein the solvent is at least one selected from the group consisting of water, alcohols and ketones.

4 . A tin oxide forming method comprising sintering the tin oxide forming composition of claim 1 at a temperature of 480° C. or higher.

5 . The tin oxide forming method of claim 4 , further comprising drying the tin oxide forming composition at a temperature of 50 to 300° C. before the sintering.

6 . The tin oxide forming method of claim 4 , wherein the sintering is carried out for 30 to 120 minutes.

7 . The tin oxide forming method of claim 4 , wherein the sintering temperature is 550° C. or higher.

Assignees

• Lg Chemical Ltd

Inventors

• Choi Jung Ho
• Hwang In Sung
• Park Hun Min
• Lee Dong Chul
• Hwang Gyo Hyun
• Kim Kwang Hyun
• Bang Jung Up

Classifications

• C25B1/34

  Simultaneous production of alkali metal hydroxides and chlorine, oxyacids or salts of chlorine, e.g. by chlor-alkali electrolysis · CPC title

• C23C22/48

  not containing phosphates, hexavalent chromium compounds, fluorides or complex fluorides, molybdates, tungstates, vanadates or oxalates · CPC title

• C01P2006/40

  Electric properties · CPC title

• C25B11/0775

  of the rutile type · CPC title

• C01G55/00

  Compounds of ruthenium, rhodium, palladium, osmium, iridium, or platinum · CPC title