How Is Ethyl Bromide Prepared From Ethyl Alcohol 2

1. Preparation of ethyl bromide from ethyl alcohol and hydrobromic acid

Start with a 1-liter double neck round bottom flask with a drop funnel and wide bend. The bend is connected to a long and efficient condenser assembly and receiver for downward distillation. First, place 281ml (or 415 g) 48% hydrobromic acid in a flask, then add 65ml (or 120 g) of concentrated sulfuric acid in batches, while shaking. As it cools, a small quantity of 145ml (or 100 g) 95% ethanol is slowly added to the mixture of sulfuric acid and hydrobromic acid. Then 109ml (or 200g) of concentrated sulfuric acid is slowly added to the drop funnel, and the ethyl bromine obtained by slow distillation is collected in the cold receiver flask. The crude ethyl bromine was washed with equal volume of concentrated hydrochloric acid, then washed with water and a small amount of 5% sodium bicarbonate solution, then washed with water, and finally dried the ethyl bromine with anhydrous calcium chloride. The crude ethyl bromide is purified by distillation and 205 grams of pure ethyl bromine is obtained.

2. Preparation of ethyl bromide from ethyl alcohol and potassium bromide

Add 50g of concentrated sulfuric acid to 25g of ethanol and let it cool under continuous stirring. Pour in 60g of powdered potassium bromide and let the mixture rest overnight. The next day, the ethyl bromine is distilled and washed, washed with dilute sodium carbonate solution and water. Finally, the obtained bromoethane was dried and re-steamed with calcium chloride.

3. Preparation of ethyl bromide from ethyl alcohol and bromine

Place 60g of ethanol and 10g of red phosphorus in a round bottom flask cooled with cold water. Then 60g of bromine was slowly added to the droplet funnel while the mixture was stirred and cooled. When all the bromine is added, stir the mixture for another hour. The ethyl bromide is then distilled and washed with dilute sodium carbonate solution and distilled water. Finally, using calcium chloride ethyl bromide and distillation, got in 38 ℃ boiling colorless heavy liquid.

If you want to know more applications of monoammonium glycyrrhizinate, please visit our website.

Comments

Acetyl Chloride

Features of Acetyl Chloride Product Name: Acetyl chloride Chemical Formula: C2H3ClO Acetyl chloride cas : 75-36-5 Dangerous Grade: 3.2 Technical Data of Acetyl Chloride ITERMS SPECIFICATION Appearance Colourless transparent liquid Assay ≥99.0% Phosphorus content ≤0.02% Package and Storage: 200kg/drum Store in a cool, dry place. Keep container closed when not in use Application /Application Industries: Acetylation reagent Pharmaceuticals Dye Acetyl chloride is a colorless flammable liquid with a pungent odor. It is violently decomposed by water or ethanol. Dissolved in chloroform, ether, benzene, petroleum ether or glacial acetic acid. Acetyl chloride is an irritant and corrosive agent. Contact with the skin can cause burns, and steam can strongly irritate the eyes and mucous membranes. When people inhale 2 ppm, they can feel the stimulating effect. Short-term exposure to higher concentrations of acetyl chloride may cause death or permanent damage. The amount of aquatic live poisoning

What is GLycolic Acid?

We like to focus on the ingredients of beauty products. But we prefer to touch the product and explore whether it really works. Alpha hydroxy acid is also known as AHA. It includes glycolic acid , lactic acid and citric acid. These products do not meet the needs. Now we analyze the most popular ingredient in the world - glycolic acid. Glycolic acid is a naturally occurring substance that is added to skin care products. It is good for the skin and restores skin elasticity and moisturization. The original state of glycolic acid is a powder composed of colorless crystals. It is tasteless. Let's first understand its benefits and its related products. The Benefits of Glycolic Acid Glycolic acid is very effective for skin treatment because of its high purity. The premise is safe and correct use. Many skin care products contain glycolic acid. Sensitive muscles can also be used. Glycolic acid is non-irritating and it can be used in skin care. Add more glycolic acid to the facial cl

1,3-Propane Sultone

Features of 1 3 propanesultone Product Name: 1,3-Propane Sultone Chemical Formula: C3H6O3S cas 1120-71-4 Dangerous Grade: 6.1 Technical Data of 1,3-Propane Sultone ITEMS SPECIFICATIONS Appearance <50apha Assay (%) >99.5 Freezing point (℃) 31.2 Refraction index(40℃) 1.453 Package and Storage: 25 kg/plastic drum Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Application / Application Industries: general-purpose sulfonating agent pharmaceutical intermediate surfactant brightener dyes lithium batteries (electronic grade) biochemistry textile lubrication wastewater treatment For more information about glycolic acid , please feel free to contact us!

Nanjing Chemical Material Corp.

Search This Blog