How to purify 925 silver into sterling silver?

The following steps can be used to purify 925 silver into sterling silver:

1.The 925 silver material was soaked in hydrochloric acid, and the reaction was completed for filtration and washing to remove impurities.

2.The silver material is placed in molten salt, where it undergoes multiple steps such as melting and purification, thereby separating the impurities in the silver material.

3.After the above steps, the resulting product still needs to be further purified. Purification can be achieved by electrolysis, which is to use the electrochemical principle to aggregate impurity ions to the electrode through electric current in the electrolytic cell, so as to achieve the purpose of separating impurities.

Silver is used as the anode, silver nitrate solution is introduced into the electrolytic cell, and the cathode is pure silver, which is purified by aggregation and precipitation under the action of electric current.

4.If the product is not pure, it can also be purified by oxidation. Under certain conditions, silver reacts with oxidants to form silver oxide with low solubility, and impurities will be oxidized into their oxides and dissolved in solution.

Therefore, through filtration, precipitation, and other steps, impurities can be removed, resulting in sterling silver.

In the process of the above steps, it is necessary to pay attention to:1The metal replacement agent used must not react with the silver nitrate solution; 2.

Excess iron powder should be used in the precipitation process in order to obtain a sufficient amount of silver; 3.Attention should be paid to safety when using oxidation method for purification to prevent danger.

Once the above steps are completed, sterling silver can be obtained.

One: Put 925 silver.

The waste is dissolved in nitric acid.

In electrolysis, more than 98% purity silver can be obtained on the cathode.

Two: There is also a soil method, put the 925 waste into a pure stainless steel pot + diluted sulfuric acid to cook, boil, and then put the brass to absorb it, so that the purity can reach more than 98%.

1. Precipitate silver chloride: In the waste liquid containing silver chloride, add excess sodium chloride to make the silver chloride precipitate completely, and then filter, wash and drain.

2. Reduce silver powder: put the obtained AGCL precipitate into a beaker, bury the iron ** in the AGCL precipitate, add concentrated hydrochloric acid to cover it, then heat it to boiling, and stir at the same time until the white AGCL precipitate turns into gray-white silver powder (about 1 hour).

3. Washing silver powder: take out the residual iron sheet, filter it under reduced pressure, wash it twice with tap water first, then wash it with distilled water, wash it until there are no chloride ions, and then drain it.

4. Drying silver powder: Move the obtained silver method to the porcelain evaporation dish, and heat and dry it on an asbestos net to obtain crude silver powder.

5. Net silver powder.

Precautions. 1. The iron sheet used should not be too thin, otherwise the residual iron filings are inconvenient to detect after the reaction, and do not use iron nails and iron blocks, otherwise the contact area with hydrochloric acid is small and the reaction is slow, and the iron sheet used is 1 mm thick, 1-2 cm wide and 4-5 cm long.

2. Copper can be used with thick copper wires in wires, but not fine copper wires, so as not to inconvenient detect the residual copper wires after the reaction.

3. The prepared silver powder should be fully washed, which is the key to improving the purity of silver powder.

925 silver is sterling silver.

925 refers to silver products with silver content, and silver products with a purity of about are recognized as sterling silver in the world, which is the minimum standard for sterling silver in the world, and it is also the internationally recognized silver standard for jewelry.

999 silver is softer and difficult to set in gemstones, so other metals are added to sterling silver to make it harder and tougher 925 sterling silver.

This kind of silver is very moldable and can be made into a variety of styles of jewelry; The surface is electroplated and polished with a bright silver sheen; The hardness is higher than that of 999 silver, and it will be slightly deformed when bent by hand; It has a stronger oxidation resistance, will not be easily oxidized and blackened, and the texture is very suitable for the process requirements.

Care precautions for sterling silver

1. If the sterling silver jewelry is not worn for a long time, it must be wiped clean with a soft cloth to avoid sweat stains left on the jewelry to cause corrosion, and then put it into a sealed bag or packaging box to isolate the air to avoid oxidation of silver jewelry and turn yellow and black.

2. Do not wear sterling silver jewelry when soaking in hot springs and playing in the water by the sea, and avoid contact with chemical solutions, otherwise there will be a chemical reaction that will make sterling silver jewelry black.

3. Try not to use silver washing water to clean sterling silver jewelry, because it will erode the surface of sterling silver, although it will soon return to brightness, but it will also quickly turn yellow and black. And every time you use silver washing water, you will once again corrode the silver jewelry.

1. The best maintenance of sterling silver jewelry is to wear it often, sterling silver jewelry has a certain health care effect on the human body, if your body is not good when you wear jewelry and wear the place will also appear black, as long as you wash it with hand sanitizer, and the body will recover naturally after recovery.

2. Do not wear other jewelry at the same time when wearing sterling silver jewelry.

3. If the sterling silver jewelry is not worn for a long time, it should be washed with hand sanitizer, rinsed with water and dried with a soft cloth, so as not to cause corrosion caused by sweat stains left on the jewelry, and then put it into a sealed bag or packaging box to isolate the air to avoid oxidation of silver jewelry and turn yellow and black.

4. Don't touch these things when wearing, sulfur or sulfur soap, don't wear sterling silver jewelry when soaking in hot springs and playing in the sea by the sea, and avoid contact with chemical solutions, otherwise there will be a chemical reaction to make your sterling silver jewelry black.

**How jewelry should be cleaned and maintained.

After I bought the jewelry and wore it for a while, the jewelry became less bright, and I didn't want to go to the jewelry store often to clean it, so I taught you some simple ones'**How to clean and maintain jewelry!

1. Removal of jewelry dust

To clean the dust and dirt of ** jewelry, the easiest way is to use a soft brush dipped in hot water to gently scrub it, it is best to use a cotton ball dipped in soapy water, anhydrous alcohol to scrub, but do not use abrasive particles (such as toothpaste, polishing paste, fine sandpaper or fine abrasive cloth, etc.) to scrub, to avoid reducing the weight of ** jewelry and causing losses.

2. Washing of jewelry

When washing ** jewelry, you should first put ** jewelry in the container, then add water to the container, and then add a small amount of ammonia, then cover the mouth tightly, shake it back and forth vigorously, and then take it out and wipe it dry.

3. Removal of white spots in jewelry

Due to the fact that some of the cosmetics on the market contain trace amounts of mercury (mercury), such as phenylhydroxymercury and mercuric dichloride in the freckle removal cream, white spots or whitening will appear after contact with jewelry, at this time, do not scrape with a knife or sandpaper, as long as the jewelry with white spots or whitening is baked in the fire, and then wiped clean with a soft cloth, **jewelry will return to its original luster.

4. **The surface of the jewelry is clean

**After the surface of the jewelry is stained with dirt, it will make the color dull, at this time, you can use the development powder of rinse**, wash it with warm water of 30-40-C, dilute it with double the water, and soak the dirty**jewelry in it for 4-6 minutes, brush off the dirt with a soft brush, rinse it with water several times, if you use fine tweed to dip the nail polish and rub it, **jewelry will be brighter.

5. Soak and clean

First take 1000 ml of warm boiled water (40-C), then add 200 ml of glacial acetic acid to make an aqueous solution, then put ** jewelry into this cleaning solution and soak it for 10 minutes, then brush it with a brush, and finally rinse it with water.

Usually put it in a box when you don't wear ** jewelry, don't put it with other metals, so it's easy to wear out.

Summary. Hello, 925 silver refers to silver products with about silver content, and the purity is identified as pure silver around the purity. Because pure silver is too soft, 925 silver is added to other metals to give it the desired hardness.

925 sterling silver is the international standard silver for making silver jewelry. 925 sterling silver is the international standard silver for making silver jewelry. Imprint.

Silver jewelry should generally be marked with the abbreviation "S" or "sterling" for silver. The mark of standard silver is S925.

Is 925 silver sterling silver.

Hello, 925 silver is pure silver, 925 silver refers to silver products with about silver content, and the purity is identified as pure silver around the time. Because pure silver is too soft, 925 silver is added to other metals to give it the desired hardness. 925 sterling silver is the international standard silver for making silver jewelry.

Can you add, I don't quite understand it.

Hello, 925 silver refers to silver products with about silver content, and the purity is identified as pure silver around the purity. Because pure silver is too soft, 925 silver is added to other metals to give it the desired hardness. 925 sterling silver is the international standard silver for making silver jewelry.

925 sterling silver is the international standard silver for making silver jewelry. Imprint. Silver jewelry should generally be marked with the abbreviation "S" or "sterling" for silver.

The mark of standard silver is S925.

Summary. Hello, dear, after inquiry, 925 silver is not pure silver, because 925 silver refers to the silver content, but there are other metal components, mainly to make silver harder, not easy to deform.

Hello, dear, after inquiry, 925 silver is not pure silver, because 925 silver refers to the silver content of early congratulations, but there are other metal components, mainly to make silver harder, not easy to deform.