Previous in Forum: How Can I Reduce Sulphates and Conductivity in Effluent   Next in Forum: Pump for Galinistan - Very Corrosive Material
Close

Comments Format:






Change Mode
Close

Subscribe to Discussion:

CR4 allows you to "subscribe" to a discussion
so that you can be notified of new comments to
the discussion via email.

Close

Rating Vote:







Add Vote
12 comments
Rate Comments: Nested
SYED MD. ANWAR UL ISLAM
Commentator

Join Date: Nov 2010
Posts: 72
Good Answers: 2

Separation of Cadmium Sulphate From Copper Sulphate

11/30/2011 5:22 AM

Hi everybody,

Can anyone tell me is it possible to separate cadmium sulphate present in copper sulphate as impurities, without a sophisticated Lab. facilities?

Anwar
Register to Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

Good Answers:

These comments received enough positive votes to make them "good answers".
PWSlack
Guru
United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
Posts: 32175
Good Answers: 839
#1

Re: Separation of cadmium sulphate from copper sulphate

11/30/2011 5:33 AM
  • Solid or aqueous?
  • Temperatures and pressures?
  • Quantities?
__________________
 "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
Register to Reply
SYED MD. ANWAR UL ISLAM
Commentator

Join Date: Nov 2010
Posts: 72
Good Answers: 2
#2
In reply to #1

Re: Separation of cadmium sulphate from copper sulphate

11/30/2011 5:49 AM

Actually I need to make 33% copper sulphate solution. But the copper sulphate crystal generally found in the market may contain cadmium sulphate & Ferrous sulphate as impurities (somebody told me) & Cd-sulphate must be removed. Fe-SO4 is not important in this case. Lab. grade CuSO4 could be used but not available.
Register to Reply
2
PWSlack
Guru
United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
Posts: 32175
Good Answers: 839
#3
In reply to #2

Re: Separation of cadmium sulphate from copper sulphate

11/30/2011 5:55 AM
  • Temperatures and pressures?
  • Quantities?

http://en.wikipedia.org/wiki/Table_of_standard_electrode_potentials

Electochemistry has a solution: A cadmium electrode and a copper electrode inserted in the solution, with a controlled voltage source wired between them outside the solution.

__________________
 "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
Register to Reply Good Answer (Score 2)
Go to Next Good Answer
SYED MD. ANWAR UL ISLAM
Commentator

Join Date: Nov 2010
Posts: 72
Good Answers: 2
#4
In reply to #3

Re: Separation of cadmium sulphate from copper sulphate

11/30/2011 7:40 AM

Any other chemical means?
Register to Reply
PWSlack
Guru
United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
Posts: 32175
Good Answers: 839
#5
In reply to #4

Re: Separation of cadmium sulphate from copper sulphate

11/30/2011 8:10 AM

Any other need?

The forum still doesn't know about temperatures, pressures and quantities...

__________________
 "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
Register to Reply
3
Mikerho
Guru
Hobbies - Musician - Engineering Fields - Chemical Engineering - New Member Engineering Fields - Control Engineering - New Member Engineering Fields - Instrumentation Engineering - New Member

Join Date: Jan 2007
Location: Moses Lake, WA, USA, Thulcandra - The Silent Planet (C.S. Lewis)
Posts: 4216
Good Answers: 194
#6

Re: Separation of Cadmium Sulphate From Copper Sulphate

11/30/2011 8:33 AM

Hi Anwar,

You can recrystallize the copper sulfate from a concentrated solution. The liquid (mother liquor) left over from the recrystalization will contain much of the impurities and can be decanted off.

This may need to be done a couple of times to get the purity that you need.

__________________
 "Reason is not automatic. Those who deny it cannot be conquered by it. Do not count on them. Leave them alone." - Ayn Rand
Register to Reply Good Answer (Score 3)
No more Good Answers.
ajwinemaker
Power-User

Join Date: Dec 2008
Location: Australia
Posts: 143
Good Answers: 24
#7
In reply to #6

Re: Separation of Cadmium Sulphate From Copper Sulphate

11/30/2011 8:46 PM

I agree, this is also possible.

GE is just releasing technology to concentrate (using Reverse Osmosis) and then selectively crystalize specific salts to achieve high purity.

This may be an option.
Register to Reply
SYED MD. ANWAR UL ISLAM
Commentator

Join Date: Nov 2010
Posts: 72
Good Answers: 2
#8
In reply to #6

Re: Separation of Cadmium Sulphate From Copper Sulphate

12/04/2011 6:45 AM

Dear Mikerho, Thanks for a good solution. You deserve a vote. You Helped me earlier too.
Register to Reply
Mikerho
Guru
Hobbies - Musician - Engineering Fields - Chemical Engineering - New Member Engineering Fields - Control Engineering - New Member Engineering Fields - Instrumentation Engineering - New Member

Join Date: Jan 2007
Location: Moses Lake, WA, USA, Thulcandra - The Silent Planet (C.S. Lewis)
Posts: 4216
Good Answers: 194
#9
In reply to #8

Re: Separation of Cadmium Sulphate From Copper Sulphate

12/05/2011 11:44 PM

Hi Syed,

Glad to help & thanks for the vote. It would be interesting to know how effective the purification step was.

Mike

__________________
 "Reason is not automatic. Those who deny it cannot be conquered by it. Do not count on them. Leave them alone." - Ayn Rand
Register to Reply
SYED MD. ANWAR UL ISLAM
Commentator

Join Date: Nov 2010
Posts: 72
Good Answers: 2
#11
In reply to #9

Re: Separation of Cadmium Sulphate From Copper Sulphate

12/29/2011 8:15 AM

Dear Mikhero, As by following your process & applied on animal model produced no harmful effect, it can be assumed that the impurities was removed. I was a student of chemistry at college level about 33 years ago & much of them have been forgotten. Yet, so far I could recollect now that crystallization process does not allow other impurities to be included in crystal lattice if the solution is not super saturated. I forgot this when I posted this problem in this thread. Thanks a lot.
Register to Reply
morrie
Commentator
Australia - Member - New Member

Join Date: Apr 2010
Location: Western Australia
Posts: 92
Good Answers: 7
#10

Re: Separation of Cadmium Sulphate From Copper Sulphate

12/28/2011 8:56 AM

A snippet from one of my old chemistry textbooks. (Partington, 5th edition)

"If a concentrated solution of potassium iodide is added to an ammoniacal solution of a cadmium salt, a white precipitate of Cd(NH3)2I2 is formed. Copper salts give no precipitate"
Register to Reply
SYED MD. ANWAR UL ISLAM
Commentator

Join Date: Nov 2010
Posts: 72
Good Answers: 2
#12
In reply to #10

Re: Separation of Cadmium Sulphate From Copper Sulphate

12/29/2011 8:19 AM

Dear Morrie, Many many thanks to learn it from you. I was not knowing this earlier. I am grateful to you.
Register to Reply
Register to Reply
Have a Different Question?
12 comments

Good Answers:

These comments received enough positive votes to make them "good answers".
Copy to Clipboard

Users who posted comments:

ajwinemaker (1); Mikerho (2); morrie (1); PWSlack (3); SYED MD. ANWAR UL ISLAM (5)

Previous in Forum: How Can I Reduce Sulphates and Conductivity in Effluent   Next in Forum: Pump for Galinistan - Very Corrosive Material

Advertisement

Got Something to Say?
Ask a Question
Start a Discussion

Search this Forum
Chemical & Material Science:
Go

CR4 Sections
Aerospace
BioMech & BioMed
Chemical & Material Science
Civil Engineering
Communications & Electronics
Education and Engineering Careers
Electrical Engineering
General Discussion
Instrumentation
Manufacturing
Mechanical Engineering
New Technologies & Research
Software & Programming
Sustainable Engineering
Transportation

Site Directories
Forum Directory
Blog Directory
User Group Directory
RSS Feeds

CR4 Rules of Conduct
CR4 FAQ
Site Glossary

Who's Online (76 right now)
Show Members
Advertisement