Page 208 - 《精细化工》2023年第4期

す 40 ࢤす 4 ᱌ ㇫ ㏳ ࡃ ጒ Vol.40, No.4
20 23 Ꭱ 4 ᰵ FINE CHEMICALS Apr. 2023

ᰶᱧ⩢ࡃ႓̻ጒ͇
⻨ၽ㛉⩢㼐∂ݣิ⅜䛾䚥ࣷڣᱧ⤳ᣏ⾣

1
2
1*
1
1
Ვ⦸ۈ 喑ॡ䖀᫝ 喑㗃ᔍ㞜 喑࢏ᘼ卼 喑ᑍ⌨⌠
喍1. 䪬⇆⤳ጒ๔႓ ࡃ႓ࡃጒ႓䮏喑⎃ࢄ 䪬⇆ 410114喠2. ⌞ౠጯ⏏䄇⩢ၽ⻾ឭᰶ䭽ڙथ喑Ꭼ͉ ⌞ౠ
518000喎
ᦅ㺮喟В Au ͧ䭠ᲮȠⴠ෕ͧ䭡ᲮȠ亞হ⩅↋⩢Ხ喍SCE喎࣯ͧ℁⩢ᲮȠ⯽䚥ͧ⩢㼐䉕喑䛴⩕⻨ၽ㛉⩢㼐∂ݣิ
–
γ⅜䛾䚥ȡᣏ⾣γ⅜䛾䚥ݣิ䓴⼸͚ Au ⮱䭠Ხ㵹ͧВࣷ჋侹᲎У喍Cl ⊀ᏓȠ⩢㼐⋟ pHȠH 2 O 2 क़䛼喎ᄦݣิ
䓴⼸⮱ᒞ৺喑ᎣᄦࣺᏁᱧ⤳䔈㵹γᣏ⾣ȡ㐀᳉㶕ᬻ喑჋侹᝭ᓄᵤ৮ࡃ႓ᐼͧ HAuCl 4 •4H 2 O喑⅜䛾䚥ϔ⢴ज䓫
3+
94.57%喠Au 㷘⩢㼐ͧ Au ࣾ⩌ౕ䭠Ხ⩢Ѻ 0.83~1.30 V喍vs. SCE喎͸䬡喑㜡䧊⩢Ѻͧ 1.3 V喍vs. SCE喎喠⩢㼐䓴
–
⼸͚ۼᄼ⩢㼐⋟ pHȠ෋๔⩢㼐⋟͚ Cl ⊀ᏓजВӰ䔈 Au ⮱⩢㼐喑ም⩢Ѻ䮼Ɑ pH ⮱ۼᄼ㔹䭺ѻ喠᱙჋侹᲎У̸
–
ᰭҠ⩢㼐᲎Уͧ喟⩢㼐⩢Ѻ 1.25 V喍vs. SCE喎Ƞ⩢㼐⋟ pH ͧ 1.0ȠCl ⊀Ꮣ 1.0 mol/LȠH 2 O 2 क़䛼 5 mmolȡNyquist
–
ఫ㶕ᬻ喑⅜䛾䚥⩢㼐ݣิ䓴⼸ऄ⩢㢤䒙⼨̻ព᪐⌤वᣔݣ喑䮼Ɑ⏣⋟͚ Cl ⊀Ꮣ⮱෋๔̻ H 2 O 2 ⮱ߍڒ喑⅜䛾䚥
ݣิ䓴⼸⩞⌤वᣔݣा⩢㢤䒙⼨ᣔݣ䓴⍎ȡ
ڠ䩛䃺喟⅜䛾䚥喠⩢㼐∂喠䛾喠⯽䚥喠ࣹ⅔Ⅱ喠ᰶᱧ⩢ࡃ႓̻ጒ͇
͚ఫܳㆨत喟TG146 ᪴⡛ᴴ䃳⴮喟A
᪴」㑃त喟1003-5214 (2023) 04-0894-08 ᐭᩫ⻾႓ (䉱⎽᰺ߎ) ᴴ䃳⴮ (OSID)喟

Preparation and mechanism research of chloroauric
acid via diaphragm electrolysis

2
1
1*
1
1
YANG Zhangjun , WU Daoxin , XIAO Zhongliang , LU Yipeng , ZHANG Tianchun
喍1. School of Chemistry and Chemical Engineering, Changsha University of Science & Technology, Changsha 410114,
Hunan, China; 2. Shenzhen Yicheng Electronic Technology Co., Ltd., Shenzhen 518000, Guangdong, China喎
Abstract: Chloroauric acid was prepared by ion-exchange membrane electrolysis using Au as anode,
graphite as cathode, saturated calomel electrode (SCE) as reference electrode and hydrochloric acid solution
as electrolyte. The anodic behavior of Au during the preparation process and the effects of experimental
–
conditions (Cl concentration, electrolyte pH, H 2O 2 content) on chloroauric acid production were
investigated, followed by exploration on the reaction mechanism. The results showed that the yield of
3+
chloroauric acid, in the form of HAuCl 4•4H 2O, reached 94.57%. The electrolysis of Au to Au occurred at
an anodic potential of 0.83~1.30 V (vs. SCE) and passivation potential of 1.3 V (vs. SCE). Reducing
–
electrolyte pH and increasing Cl concentration in electrolyte could promote the electrolysis of Au, and the
peak potential decreased with the decrease of pH. The optimum electrolysis conditions of this research were
–
obtained as follows: Anode potential 1.25 V (vs. SCE), electrolyte pH 1.0, Cl concentration 1.0 mol/L,
H 2O 2 content 5 mmol. Data from Nyquist diagram indicated that the electrolytic preparation process of
–
chloroauric acid was controlled by charge transfer and diffusion. And with the increase of Cl concentration
in solution and the addition of H 2O 2, the preparation process of chloroauric acid transited from the mixed
control to charge transfer control.
Key words: chloroauric acid; electrolytic method; gold; hydrochloric acid; hydrogen peroxide; electro-
organic chemistry and industry

ᩣ⽬ᬒ᱌喟2022-07-29; Ⴧ⩕ᬒ᱌喟2022-10-26; DOI: 10.13550/j.jxhg.20220707
ധ䛾䶦Ⱋ喟⎃ࢄⰮᝅ⪒ᕔ᫝ಸ䛺๔䶦Ⱋ喍2019GK4041喎
҉㔲キϸ喟Ვ⦸ۈ喍1997ÿ喎喑⩤喑ⶂธ⩌喑E-mail喟1501062493@qq.comȡ㖁㈨ϧ喟ॡ䖀᫝喍1971ÿ喎喑⩤喑᪆ᢵ喑E-mail喟daoxinwu@
126.comȡ