What to do with polyferric sulfate on clothes

Solution: When the garment is stained with ferrous polysulfate, it reacts with air to form a precipitate of iron oxide or iron hydroxide, which undergoes a chemical reaction under the action of acid to form water and iron salts. It can be cleaned with oxalic acid, hydrochloric acid, vinegar, or even lemon juice.

The details are as follows: Method 1: Add oxalic acid solution to water to form a 1% 2% aqueous solution, wash it with warm water at about 50, and then rinse it with water. The principle is to form ferric oxalate, and the reaction equation is:

2Fe2O3+6H2C2O4=2Fe2(C2O4)3+6H2O If it is rust stains, you can mix oxalic acid and citric acid with water to soak the rust, then soak it in concentrated salt water, and rinse it with water after one day.

Method 2: Another common method is to add hydrochloric acid aqueous solution at a ratio of 1:1. The operation is similar to oxalic acid, and the removal principle is: 6HCl + Fe2O3 = 2FeCl3 + 3H2O.

Method 3: When there is no spare hydrochloric acid or oxalic acid at home, you can cover the rust stain with salt, soak it in white vinegar for 1 hour, and then wash it with water.

Method 4: Drip lemon juice onto the rust on the clothes to soak it, then add salt to grind, and then wash it with water. The principle is to use lemon juice to reduce the trivalent iron in the rust to divalent iron and dissolve it in water (10% citric acid solution can also be used).

Method 5: If the area is relatively small, you can wipe it with a cotton swab with 15% acetic acid solution, 10% citric acid solution, and 10% oxalic acid solution.

Method 6: Soak the rust-stained part in 15% acetic acid solution, and rinse with water the next day.

Tip] If ferric sulfate gets on the clothes, it will make the part of the clothes yellow and difficult to remove, and even cause the clothes to become invalid.

It is good to wash and scrub with sodium carbonate or sodium bicarbonate, which is the soda ash used at home, because sodium carbonate is a strong alkali and weak salt, which can be dissolved in water and react with iron salt to generate precipitation and wash down, CO32-+H2O=HCO3-+OH-; oh-+fe=fe(oh)2

Use wind oil essence to remove clothes and paint.

If your clothes are accidentally stained with paint, most people think of washing them with gasoline, but in fact, using wind oil essence can also solve your problems. The method is: apply a little wind oil essence to the stain, rub it with both hands several times, the paint will fall off, and then wash it with water.

The detergency of wind oil essence is comparable to that of gasoline, and the aroma is not as bad as gasoline.

The second method:

When the paint is not dry, it can be removed by repeatedly rubbing it with kerosene, then rubbing some dilute acetic acid, and finally washing it with water. Sprinkle a few drops of alcohol on the paint on your garment, then rinse with warm water and soap. As soon as the garment is painted, it can be wiped off immediately with turpentine.

The new latex paint can be soaked in water and rubbed.

The third method:

Paint smudge removal method.

Freshly stained paint on clothing can be wiped with turpentine or banana water, or with turpentine before petrol.

The old stain can be soaked in 10 20 ammonia or borax solution, so that the paint is dissolved, and then the stain is wiped with a hard brush, and then scrubbed with soap, rinsed and dried.

How do I remove rust stains from clothing?

After the clothes are stained with iron, they can be washed with 2 oxalic acid solution in about 50 warm water to remove, and then rinsed with water. Powder 3 or 4 vitamin C tablets, sprinkle on soaked clothes, and then scrub with water several times to remove rust stains. If it is rust stains, you can use 10 oxalic acid and citric acid to add water mixture to soak the rust area, then soak it in concentrated salt water, and wash it after 1 day.

The second method: you can cover the stain with salt, soak it in white vinegar for an hour and then wash it, the third method: rust or blood stains on clothes, you can apply some lemon juice, add a little salt, stay for a while, and then wash it with water to remove.

The fourth method: first soak it in boiling water and then wash it with sour milk. 1.Wipe the stain with a 15% acetic acid solution (15% tartaric acid solution is also acceptable), or soak the stained part in the solution, and rinse it with water the next day.

The fifth method: 10% citric acid solution or 10% oxalic acid solution will stain the stain.

then soak in concentrated salt water and rinse the next day.

The sixth method: white cotton and cotton blended fabrics stained with rust, you can take a small grain of oxalic acid (available in pharmacies) and put it on the stain, drip some warm water, rub it gently, and then rinse it with water. Pay attention to the operation to be fast and avoid corrosion.

The easiest way: If you have fresh lemon, you can squeeze out its juice and drop it on the rust stain and rub it by hand, repeat several times until the rust stain is removed, and then wash it with soapy water.

You can add a little alcohol to the rusty area when you wash your clothes, which may be useful.

In the laboratory, when the preparation of inorganic coagulant polyferric sulfate and the effect experiment of treating sewage, the experimental procedure after hydrolysis of polyferric sulfate:

1.Detection of Fe2+ in the product of polyferric sulfate.

take 5ml of polyiron solution, add it to a 250ml Erlenmeyer flask, dilute it to 100 150ml, add 10ml of sulfur and phosphorus mixed acid, add 5 8 drops of sodium diphenylamine sulfonate solution after cooling, and titrate it with K2Cr2O7 standard solution until it is stable purple.

2.Detection of alkalinity.

a.Take the polyiron solution with a pipette and place it in a 250 ml Erlenmeyer flask.

b.Pipette the hydrochloric acid accurately, then add 20 ml of CO2-free distilled water and shake well, cover the surface dish, and leave at room temperature for 10 min.

c.Add 10 ml of potassium fluoride solution and shake well. Two more drops of phenolphthalein were added, and the sodium hydroxide standard solution was immediately titrated to a light red color as the end point. (Or titrate to pH d with CO2-free distilled water for blank test, repeat the above steps.)

The preparation of inorganic coagulant polyferric sulfate and the effect of sewage treatment are complete.

How to use polyferric sulfate in production and life:

When using, the liquid polyferric sulfate is generally prepared into a 10%-50% aqueous solution (it can be added directly when the source water turbidity is high), and the solid polyferric sulfate is prepared into a 10%-30% aqueous solution, and then the prepared solution is put into the best conditions and dosage according to the specific situation, and the best coagulation effect can be obtained after full stirring.

The dosage can be determined according to the different turbidity of the raw water, the best dosage can be determined, the general turbidity (turbidity in 100-500mg L) water, 30-50 kg of this product per thousand tons, non-potable water high turbidity industrial sewage can be appropriately dosed.

When industrial wastewater is treated, the first-class polyferric sulfate is diluted to 1-2 times the aqueous solution. When the source water concentration is high and the treated water volume is large, it can be directly added. Then, according to the results of the laboratory simulation test, according to the best process conditions and dosage, after full stirring, coagulation and sedimentation, the clarified effluent can be obtained.

The water purification plant can also be diluted 2-5 times before adding. The determination of the dosage can be determined by the nature of the raw water through production debugging or beaker experiments depending on the formation of the appropriate amount of alum, the water plant can use the original dose of other drugs as a reference, under the same conditions, this product and the amount of solid polyaluminum chloride is roughly the same, is the amount of solid aluminum sulfate 1 2-1 3. If the original liquid product is used, it can be calculated according to the corresponding concentration of the agent, roughly according to the weight ratio of 1:

3 depends. A large number of practices have proved that ordinary polyferric sulfate is difficult to achieve the expected purpose in most cases, and it is generally necessary to carry out a dosage form selection test according to the use medium and place of use to determine the appropriate dosage form and preliminary dosage amount of 23 Guizhou SC application science and technology, and then carry out industrial dynamic test to determine the best dosing point and the best dosing point. In order to facilitate the continuous expansion of the application range of polyferric sulfate in the field of mining and metallurgy.

After the hydrolysis of polyferric sulfate, it reacts with pollutants, which can increase the weight of suspended particles in water to achieve precipitation gravity, and can also have an electric neutralization reaction with suspended colloids to destabilize the suspended colloids.

When the alkalinization degree of polyferric sulfate is high, it has the best turbidity removal effect on wastewater. In this alkalinity process, it has the best neutralization effect on the charge in the wastewater, that is to say, its condensation and destabilization, and the best effect on the sweeping and flocculation of polluted suspended solids. When the dosage of polyferric sulfate is suitable, its turbidity removal effect on wastewater will be the most thorough.

It will not cause the waste of chemicals and the accumulation of iron ions caused by excessive dosage, but will increase the turbidity.

The turbidity in wastewater is mainly caused by microfibers, particulate impurities, algae, suspended solids and other substances floating or suspended in the wastewater that make the water quality turbid. These impurities are unstable and can be removed by filtration or physical precipitation. However, there are still some suspended solids, such as colloidal particles, which are suspended in water, and are usually coagulated by the addition of polyferric sulfate.

Polymerized ferric thioleate is placed in a finished product pool.

After a period of time, there will inevitably be a hydrolysis of iron ionization to produce hydrogen du

If you want to reduce the appearance of precipitate as much as possible, you can use dropwise addition of a small amount of dilute sulfuric acid to inhibit hydrolysis, so as to reduce the appearance of precipitate without affecting the use effect.

The yellow-green precipitate is usually caused by the amount of polyferric sulfate added too much, and the polymer formed is very loose, but it is easy to float. It is possible that the sludge at the bottom of the sedimentation tank is anaerobic and then floats up. It is necessary to discharge mud from the sedimentation tank in time.

Whether there is aeration in the inlet water creates an air flotation effect.

You can add coagulant, I have done experiments, iron sulfate plus polyacrylamide, the flocculation effect is greatly improved, the precipitation time is greatly reduced, polyferric sulfate in the water treatment process, polyiron can quickly hydrolyze to form a large number of positive multi-nucleated complex ions, neutralize the surface charge of colloidal particles, strongly adsorb colloidal particles, through adhesion, bridging, cross-linking, and sweeping, so that the particles condense to form floc and settle, so that the water is clear.

Or the wastewater contains trivalent chromium ions and appears green. Chromium hydroxide is a gray-green colloidal precipitate, for the removal of chromium ions, a certain amount of ferrous sulfate and sodium sulfide can usually be added to remove chromium first, and then a polyferric sulfate solution and polypropylene are added for flocculation and precipitation, the effect is better, generally mercury ions and potassium iodide reaction will produce yellow-green precipitate, and instantly become gray-green (a mixture of mercurous iodide and mercury) and then gray-black.