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"Silver extraction from waste hypo/fixer solution"


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2004

Q. Hello sir,

I am a student of fourth semester (p.g.), I am doing project on "silver recovery from photographic fixer & x-rays" for that I need some information. As now I am using some chemicals which are economic to use them.These are ; nitric acid, hydroquinone, fusion mixer etc.but I am confuse to use hydroquinone ,is hydroquinone is useful for complete precipitation & how much silver it will recover? Please provide me above related information. Thank you.

Chemistry is useful in removing pollution & further recovery of metals

Srishti
student (s.g.s.i.t.s) - Indore, Madhya Pradesh, India
^




2004

affil. link
"Recovering Silver from
Photographic Materials"

by Eastman Kodak Co.
from Abe Books
or

Q. I am planning to start silver extraction plant. But I have some doubts regarding the same. I have read some letters on the same topic and I believe that my problem will be solved by this letter. During the photographic film processing, Silver leaches into the fixer solution (Sodium Thio-Sulphate) from the photographic film and forms Silver Thio-Sulphate complex ions. The fixer is considered exhausted after becoming silver-rich (~ 7 gm/l), as it can no more serve the purpose of fixing the film in effective manner. Such exhausted fixer can then be processed to recover the Silver from it. There are various methods for this. I read about this business in news paper and searched through the literature, internet, etc. and came to know the various techniques of Silver recovery from fixer. But my doubt is that what will be purity of silver after extracted it by electrolysis method. if it is not 99.9% pure, I will not be able to sell it. Further what are the various methods of refining the extracted silver?

A, GANGADHAR REDDY
gold and silver shop - NELLORE, ANDHRA PRADESH, INDIA
^


2004

Q. Dear Sir/Madam,

I want full detail of extraction of silver from hypo, fixer and waste x-ray films.

I want books on extraction of silver in different methods any books you have what is the cost of books.

Pramod
- Bangalore, Karnataka, India
^


2004

Q. I am interested to know about silver extracting from waste of x-ray etc. Please help me in knowing the source of supplier of machine, its cost and the process (whether it is economical or not).

Regards,

Anand Dixit
silver extracting from hypo - Delhi, India
^


A. Hi. Kodak has a great list of free downloadable pdf publications at

www.kodak.com/US/en/corp/environment/kes/pubs/pubsList.jhtml

One of these publications is a list of vendors of silver recovery systems.

Luck and Regards,

Ted Mooney, finishing.com
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
^

---
Ed. note May 2013: Sorry, Kodak has now put those documents behind a pay wall.


2004

Q. Dear Sir,

I want to start a part time business of silver extracting. Could you please help me with the procedures regarding the extraction of silver, i.e,. which machine are required and where can I find literature regarding the same.

THANKING YOU,

Vivek Raj Kumar
student - Mumbai, Maharashtra, India
^


2004

Q. Dear sir,

I want to set up a small scale business of processing silver from photographic film. I would be very thankful if you could provide me information about the following queries:-

1) various chemical methods employed to extract silver on small scale and its extraction procedure
2) what are the reasonable rates at which I can get processed fixture hypo.
3) which method is most suitable a) electrolytic method b) photographic film processing

I would like to hear early response from potential suppliers ... thanking you in anticipation of early reply and I remain sirs,
Your Faithfully,

Mr.G.S Bhalla
- karnal, haryana, India
^


2004

A. Silver refining answers at Kodak site - publication J-212
http://www.kodak.com/US/en/corp/environment/kes/pubs/pubsList.jhtml

Andy Chaney
Insurance - USA
^

---
Ed. note May 2013: Sorry, Kodak has now put that document behind a pay wall.


2004

Q. I HEARD ABOUT SILVER REFINING FROM HYPO/FIXER, BY PRODUCT OF X-RAY DEVELOPING PROCESS CAN GIVE PUREST SILVER, IS THAT TRUE? IF YES, HOW CAN WE KNOW THE PERCENTAGE OF SILVER IN GRM/LTR? WHAT IS THE EASIEST METHOD FOR SILVER TESTING? SILVER GAIN BY THIS METHOD IS COST-WISE COMPETITIVE OR NOT?

THANKING YOU.

VIMAL PATEL
HOBBYIST - JUNAGADH, GUJARAT, INDIA
^


2004

Q. I have heard about silver extraction from fixer solutions used in photographic films, and x-ray films. I live in UAE and would like to know more about this. I have no knowledge about this as of now and I am totally new. There are a lot of x ray films waste in this part of the world. Is there a handbook of step by step which can guide me through the technology, the process, the steps, and everything from sourcing to selling of silver. Is anyone interested in selling his expertise? I would also like to know if there are any harmful side effects of using these machines to extract silver. Is there anybody else you know of who is doing this in UAE?

Thanking you,

Sumit Mittal
Entrepreneur - UAE
^


2004

Q. Hello!

Does anybody have idea of getting silver from the mixture of AgNO3 and CuNO3.

Thanx in advance.

KEYUR TANDEL
silver refining - vapi, GUJARAT, INDIA
^


2004

Q. I have access to the negative archives of an old family photography studio and am interested in recovering silver from the film before disposing of it. The film goes back to the 1940s and includes much b/w that I understand to have salvageable silver. Can anyone help me with a process to extract it? I have a silver recovery system to treat waste fixer, if that is of help. Many thanks for any suggestions or assistance.

Tony Dutton
hobbyist - Valley City, North Dakota, United States
^


2004

Q. Hello sir,

I am using the silver recovery machines with the capacity of 100 liters and 55 liters each. I am able to recover silver from fixer, but not from the bleach. Can you provide me the passage of voltage and amps to the cathode and anode for fixer, bleach and fixer mixed with bleach. It would be much helpful.

Thanking you in advance.

Mahesh
recovery unit - Bangalore, Karnataka, India
^


2004

Q. To whom it may concern:

I am a fifth year Chemical Engineering student and is currently enrolled in a plant design class. I would like to ask for information about the complete process flow in extracting/recovering silver from used X-ray films. I am very much interested with this topic because aside from being potentially profitable, it is also environment-friendly. Please help me! Thank you and God bless.

June Romgaille O. Perena
student - Antipolo City, Rizal, Philippines
^


2004

Q. What is the concentration of saturated x-ray fixer. How much silver I get from electrolysis method.

Naresh
student - Bhilai, Chhattisgarh, India
^


2004

Q. I want to know about silver extraction from X-Ray films and Hypo and Technical and Machinery should be used in this part

Haja Najumudheen.M
Silver Extracting - Madurai, Tamilnadu, India
^


2004

Q. GUD AM! Sir just want to ask some question regarding about the topic, can you send me some related literature on how can I extract the silver from the films, I hope you can send it to me, cause I need to submit a research and I'm planning to submit it as a completion for my subject thanks and Good day God bless you.

Reb Agustin
student - Manila, Philippines
^


2004

Q. Please help me as I cannot always get silver recovered from the deposit got after chemical process. In the same batch it gets recovered after melting / refining but sometimes it does not get recovered on melting / refining by heating, my melter/ refiner is honest and also can't cheat as the whole process gets completed in my strict watch. There is something wrong in my melting process. My melter is illiterate, he just simply does the work commercially.

Vipin Agrawal
silver extraction from fixer hypo - Askn, MP, India
^


2004

Q. We are having a research project about the recovery of silver from used x-ray film developer. Unfortunately, we do not know the chemical formula of the film developer. If you happen to know, kindly inform us.

Thank you.

Jed Asiaii Dimaisip
student - Quezon city, Metro Manila, Philippines
^


2004

Q. Dear Sir,

I have tried and started to extract Silver from hypo solution by chemical and electrolytic methods. But I could not get gain out of those methods. I do not know the fault I do. I therefore request you kindly guide me properly to extract silver from hypo solution by electrolytic method with profit. I got one machine purchased. The proper procedure will guide me to do the process successfully. Thanking you.

Yours ever,

GOPAL.PERUMAL
Silver Extraction - Salem, Tamilnaduand, India
^


2004

Q. Hello,

How are you? I work in mining company in Zanjan. I want to recover silver from photography solution by electrowinning process. I tried for this purpose by solvent extraction method, but I have not desire extractant. So I have to use other method.can you help me? I think that we can doing some hydrometallurgical process together. I am waiting for your answer.

With best regards,

Davood Behnian
chemical engineer - Zanjan, Iran
^


2004

Q. Enquiries:

Please inform me about the detailed information about silver extraction from fixer and Hypo solution What is the raw material required for building the machine and what are the power requirement and chemical requirement for constructing the machine what kind of electrodes are required for the machine

1) How much silver can really be extracted in terms of grams/liter. from an used fixer in saturated state ? And what can be the % of purity of this extracted silver? At what price can it be sold at the current market price?

2) Can the fixer solution after extraction of silver be again reused for photographic development purpose? If so, at what price it can be sold to the consumer? Is there any qualitative difference with a "fresh"solution?

3) What is really the difference between Fixer and Hypo? Would you please give me clear idea on that? I do not have any.

4)Can there be any quantitative difference in silver content in different used fixer/hypo solutions procured from different sources viz., one from photography unit, the other from X-ray clinic, still other from offset printing unit or CT scan clinic etc.?

5) Can the film scraps also be utilized for silver extraction purpose?

6) How much hazards are involved in this trade, from health point of view? What precautions are to be taken?

I have come across a plant manufacturer who claims they can provide an automatic plant with a capacity of 300 grams/day,500 grams/day, 1 kg, 3 kg and 5 kg or higher capacity, which requires no other input except used fixer and can produce 10 grams of pure silver from one lit.of saturated fixer solution. What should be my checkpoints before deciding on it?

I am completely new in this field and practically I do not have any idea on it, though I am seriously interested to start it without much delay. So I would be highly grateful to get your valuable suggestions on this trade. With regards

Niraj R Rana
Silver - PUNE, MAHARASHTRA, INDIA
^


2004

Q. I can't collect total (100%) silver from hypo/fixer of colour labs by electrolysis method (I bought electro machine from Silvo India ) . I can't collect only last 1.5% silver so my business gone on loss, I've done many tries on electrolysis but the result is bad ... please suggest how can I collect total silver (color labs fixer hypo) from electrolysis ?

Ujwal Shrestha
- Bhadrapur, Jhapa, Nepal
^


2004

Q. I am planning to start silver extraction business part time from waste photographic hypo solution. I am B.Sc.(Hons) in physics and working as a chemist in a firm. I shall be very thankful if you please answer some of my questions.

1. Various chemical methods employed to extract silver on small scale. Its exact procedures?
2. Electro-Chemical method (Through Electrolysis) Its feasibility?
3. Procurement of plant and machinery

In nutshell I want to know the details of easy and profitable practical method for the extraction of Silver from waste Hypo fixer solution. Please guide accordingly. I shall be very thankful to you.

Raval Manish R.
Aum Extraction - Jamnagar, Gujrat, India
^


2004

Q. Please furnish me information on current density for electrolytic silver recovery from fixer. I am writing a thesis on the above subject.

OBIOHA UKEKWE
- Port Harcourt, Nigeria
^


2004

Q. I HAVE FIXED/HYPO SOLUTION CONTAINING SILVER. I NEED INFORMATION REGARDING EXTRACTION OF SILVER BY ELECTROLYSIS OF FIXED/HYPO SOLUTION. THANKS FOR YOUR HELP.

OSAMA ARABY
- ALEX, EGYPT
^


2004

Q. I want to be a business of silver extraction from fixer. Please tell the all technique which can be conveniently operated at home.

Parag Swami
- Bikaner, Rajsathan, India
^


2004

A. Chemical process is the only extraction cheap & fast method by which silver can be separated from waste hypo solution. The black residue can be melted, and purified easily by electrolysis process.

Yesudas K I
- Nethaji Road, Aluva,Kerala, India

----
Ed. note: Thanks, Yesudas


2004

Q. Dear Sir/Madam

As I am in to silver extraction business from waste photography chemical past 5 years.

Our process of extracting sliver:
* we extract silver from electrolysis process
* as it is very much time consuming method

My question is
* is there any new process or method where silver is extracted in a short time, and any new things I would like to know from your side.

Awaiting for your response with high expectations

Rupesh

Rupesh N
- Bangalore, Karnataka, India
^


thumbs up signHi Rupesh. With over a hundred people on this thread standing in line ahead of you, awaiting the information which you claim to already have but haven't shared, yes, you certainly do have high expectations :-)

Honestly, I don't know how you folks think a public forum is supposed to work :-)

Regards,

Ted Mooney, finishing.com
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
^


2004

Q. I WANT TO REALIZE MYSELF A SILVER RECOVERY SYSTEM. CAN YOU PLEASE HELP ME BY A TECHNICAL AND SIMPLE DOCUMENTATION. THANK YOU;

Yazid Annaba
photograph - Algiers, Algeria
^


2004

A. To remove silver from X-rays:

- you can wash the films in bleach fixer or

- you can treat the films with Iron-Chloride (FeCL3) and then wash with normal fixer (thiosulfate).

Both solutions can be desilvered with electrolysis. You can also desilver with a chemical reduction; use Sodium-borohydride as a reductor. The silver falls down as a sludge. Filter and dry & melt......

Films can also be washed in Nitric acid. The silver can be obtained by adding Sodium-chloride solution to the acid. The silver falls down as a silver-salt (silver-chloride). You can melt the salt together with soda-ash and Borax [affil. link to info/product on Amazon].

A.F. van Riet
- Moerdijk, Netherlands, Europe

----
Ed. note: thumbs up signThanks, A.F.!


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