MAKING STANNOUS CHLORIDE

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INDY864

Well-known member
Supporting Member
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Dec 4, 2010
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53
OK. i just received my tin solder. Per the GOLD N SCRAP note, I dissolved 2 grams of the solder in 30 ml of 32% HCL. Lets say I ATTEMPTED TO. I had to leave my shop early before the job was complete. I have a noticeable amount of residue - more than I expected from a 99% tin solder. Also, how long should it take by boiling to dissolve the tin? Is the residue expected?>
INDY 864
 
The residue is probably antimony, it should say on the solder label.
Just pour the solution off of it to another container.
Do you have any gold solution to test it?

Jim
 
Dissolve some gold and test.

Here is a link to more stannous information;
http://goldrefiningforum.com/phpBB3/viewtopic.php?f=48&t=2082&p=17541&hilit=stannous#p17541

Jim
 
i dissolve all the metal the solution will hold and then put solution in my dripper bottle with a small piece solder in the bottom to keep the solution active.
 
PERFECT. Thanks Geo.
BTW. I have to be sure there is no free nitric in my gold solution before testing, right? ANY VARIATIONS? The S/C is only good with A/R,
right?
I've learned to ask this question because I've learned there are always variables. :lol:
INDY
 
nitric content should not effect the test, at least it never has for me. it will test any solution that contains gold and many other PM's other than silver.
 
Geo said:
nitric content should not effect the test, at least it never has for me. it will test any solution that contains gold and many other PM's other than silver.
Click to expand...
That's not true. Stannous chloride will not serve for tests in basic solutions, and can fail to respond to acidic solutions that have an excess of nitric. In such a case, when testing gold chloride, you can expect two things to happen. One of them is for no reaction at all---so the test may not be conclusive in the hands of a person that has no clue.

The second thing that can, and will, happen, is for the test to flash color instantly, then disappear just as fast as it appeared. The colloidal gold precipitated is re-dissolved, obliterating the test results. For these reasons, everyone should be familiar with testing by more than one method.

Crystals of ferrous sulfate can serve quite nicely for the purpose. A drop of solution is placed in a cavity of a spot plate, then a crystal of ferrous sulfate is introduced. Gold will precipitate, often in a sheet---and the color of the solution will shift, reverting to clear, assuming all of the gold is precipitated, and there are no other metals in solution.

Harold
 
i can assume it made no difference in my test because i only add nitric in small quantities untill all the metal is dissolved. i really hate trying to evaporate nitric acid, though i suppose its something i should try to master.
 
Geo said:
i really hate trying to evaporate nitric acid, though i suppose its something i should try to master.
Click to expand...
Indeed it is! If you intend to refine, you should be well versed on any of the basic procedures, for there will come a time when things may not be as they appear, and you'll be required to evaporate a solution. Being familiar with the process ensures you'll achieve the required success.

One think to keep in the back of your mind, assuming you face evaporation. There is no easier way to eliminate free nitric than to use it. An added button of pure gold when evaporating makes short work of the process, assuming you have an excess of HCl present. Remember---that's not a problem, unlike excessive nitric.

Harold
 
Solder is ok because it is expedient, but I heartily recommend using pure reagent.

We keep ours with tin powder in the bottom and use SnCl2*2H2O in 0.5 M HCl.
 
Hi, I know this is probably going to pull up an old thread that hasn't been touched in forever but it poked like the right place to post this question.
I am doing gold refining for a highschool science fair project and I've run into an issuer with making Stannous chloride.
I am using *tin shot and Muriatic acid (hydrochloric acid?) to try to make stannous chloride.
A guid I found for getting gold from computer chips said the process would take about 4~6 hours at room temperature.
I made the solution of approximately 1 gram of tin shot and 30 ml of acid. The temperature here has been very inconsistent (20 degrees F in the morning/night and 50 degrees F in the afternoon) so I left the solution to sit for 24 hours and nothing happened, the tin shot is just sitting there not dissolving.
I think temperature is the problem but I'm not sure if there is something else I'm doing wrong.
Yes I have been doing this outside, parents don't want me doing it indoors.

Edit: *the tin shot is the first item on the website listed, for some reason I can't click it to look at the item... Sorry for any inconvenience.
 
Cryxis said:
Hi, I know this is probably going to pull up an old thread that hasn't been touched in forever but it poked like the right place to post this question.
I am doing gold refining for a highschool science fair project and I've run into an issuer with making Stannous chloride.
I am using *tin shot and Muriatic acid (hydrochloric acid?) to try to make stannous chloride.
A guid I found for getting gold from computer chips said the process would take about 4~6 hours at room temperature.
I made the solution of approximately 1 gram of tin shot and 30 ml of acid. The temperature here has been very inconsistent (20 degrees F in the morning/night and 50 degrees F in the afternoon) so I left the solution to sit for 24 hours and nothing happened, the tin shot is just sitting there not dissolving.
I think temperature is the problem but I'm not sure if there is something else I'm doing wrong.
Yes I have been doing this outside, parents don't want me doing it indoors.

Edit: *the tin shot is the first item on the website listed, for some reason I can't click it to look at the item... Sorry for any inconvenience.
Click to expand...

You need to add heat for your reaction to take place.
 
Nevermind parents said it wouldn't last the few hours for the reaction and we don't have any spare ones for later.
They said I could bring it in to make the stannous chloride as long as it doesn't produce fumes...
I can't find anywhere that says it does or doesn't.
Does the process of making at annoys chloride produce fumes?

Edit: very bad auto correct
 

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