Can anyone help me get some potassium hydride? How do you convert potassium hydroxide into potassium

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Potassium hydride is a colorless and transparent crystal powder, which is mainly used in chemical experiments as a reducing agent, catalyst, dehydrating agent, desiccant, etc. Below we will analyze the use and role of potassium hydride in detail from two aspects: application field and specific use.

1.Fields of application

Potassium hydride has a wide range of applications in the field of chemistry, such as organic synthesis, chemical analysis, metal processing, etc. In addition, potassium hydride can also be used in metallurgy, electronics industry, optical glass manufacturing and other industries.

2.Specific uses

1) Reducing agent: potassium hydride is a strong reducing agent, which can have a reduction reaction with many substances, such as for separating metal barium, beryllium, germanium and other elements.

2) Catalyst: Potassium hydride can be used as a catalyst for hydrogenation reactions, such as catalyzing coal gas to produce ethylene, vinyl chloride, etc.

3) Dehydrating agent: potassium hydride can react with water to produce hydrogen and potassium hydroxide, so it is often used as a dehydrating agent, such as blocking reeds to dehydrate aqueous cork, dry gas, remove formaldehyde, produce cellulose, etc.

4) Desiccant: Because potassium hydride is hygroscopic, it is usually used as a desiccant. For example, a small amount of potassium hydride is usually added to the food desiccant on the market to remove moisture from the food.

In summary, potassium hydride is a chemical substance with important uses and is widely used in several fields. It can not only be used as a reducing agent, catalyst, dehydrating agent and desiccant, but also play an important role in various industries such as metal processing, optical glass manufacturing, and the electronics industry. At the same time, it should be noted that in the process of using potassium hydride, protective measures must be taken to avoid the health hazards caused by contact with ** or inhalation of its powder.

To purify potassium hydroxide (KOH) to potassium (K), the following steps can be taken:

1.Potassium hydroxide is dissolved in water to produce a potassium hydroxide solution.

2.The potassium hydroxide solution is slowly added to the silver nitrate (AgNO3) solution, which produces a white precipitate, which is silver chloride (agCl is messed up).

koh + agno3 agcl + kno3

3.The resulting silver chloride precipitate is filtered out and washed with deionized water.

4.The precipitate is placed in aluminum foil and placed in a reduction furnace and heated at high temperature to reduce it. The reaction formula is:

2agcl + h2 2ag + 2hcl

5.The resulting silver precipitate is filtered out and washed with deionized water.

6.The washed silver precipitate was added to sulfuric acid (H2SO4) and reheated to obtain pure potassium.

2ag + h2so4 ag2so4 + 2h

ag2so4 + 4k k2so4 + 2ag

For example, let's say we have 500 ml of potassium hydroxide solution at 15% concentration, and we want to extract the potassium from it. First, we slowly add the potassium hydroxide solution to the silver nitrate solution, creating a white precipitate. The resulting silver chloride precipitate is then filtered out and washed; Subsequently, it is placed in a reduction furnace and heated at high temperatures to obtain silver precipitates.

Next, the washed silver precipitate is added to the sulfuric acid and reheated to obtain pure potassium. Finally, pure potassium is obtained by washing the potassium with deionized water and drying it to pure potassium.

It is important to note that it is important to be safe during operation and avoid contact with or inhalation of harmful chemicals. In addition, this method is a chemical laboratory purification method, which is not easy to master and carries high risks, so it is not recommended to try it at home or in a non-laboratory environment.

1. Potassium hydride is an inorganic hydride with the chemical formula of Kh and white needle-like crystals. The commercial for potassium hydride is a 35% suspension of grey powder semi-dispersed in oil.

Potassium hydride is very sensitive to humidity and is easy to decompose when exposed to water, so it needs to be sealed and stored in a cool and dry manner. Heating and water can release flammable gas, corrosive.

2. First aid method for exposure to potassium hydride.

1) **Contact: Immediately remove contaminated clothing and rinse with plenty of running water for at least 15 minutes. Medical treatment.

2) Eye contact: Lift the eyelids immediately and rinse thoroughly with plenty of running water or saline for at least 15 minutes. Medical treatment.

3) Inhalation: Quickly get out of the scene and move to a place with fresh air. Keep your airways open. If you have difficulty breathing, give oxygen. If breathing stops, artificial respiration is performed immediately. Medical treatment.

4) Ingestion: Those who take it by mistake rinse their mouths with water and drink milk or egg whites. Medical treatment.

5) Fire extinguishing method: Do not extinguish with water, foam, carbon dioxide, halogenated hydrocarbons (such as 1211 fire extinguishing agent), etc. The fire can only be extinguished with a metal lid or dry graphite powder or dried dolomite powder.

Potassium is produced in a hydrogen gas stream of 300 400 to produce potassium hydride.

Hydrogenation device for the preparation of lithium hydride:

1: quartz tube; 2: seamless steel pipe; 3: Iron boat; 4: An iron cylinder closed at one end.

Oxides are removed from the surface before use, for which the device can be vacuumed, electrolyzed hydrogen from 5 and heated for a long time with an electric furnace. Hydrogen should be pretreated with phosphorus pentoxide desiccant.

The required metallic potassium should be melted several times in xylene to remove paraffin oil or high boiling hydrocarbons attached to it. First of all, H2 is introduced to drain the air and keep H2. Put the metal potassium with smooth surface in the boat 3, put it into the cylinder 4, put it into the seamless steel pipe 2 again, and load the pipe 1.

Heat the quartz tube to 300 400 to slowly evaporate the potassium metal, at which point fine needle-like crystals are deposited on both sides of the furnace. The H2 airflow is maintained at all times throughout the day the reaction is carried out. When the pressure in the valve 7 indicating tube of the pressure gauge type is no longer reduced, the nozzle 6 is opened, the hydride generated is scraped into the tube 8 with a platinum shovel in the hydrogen gas flow, the tube 1 is removed from the grinding port 9, and it is plugged.

Take a puff of potassium hydride from 10 and store in a sealed bottle.