Nanjing Chemical Material Corp.
Service

Preparation of Ethyl Iodide Preparation of Ethyl Iodide

Preparation of ethyl iodide

First, the principle:

Ethyl iodide is usually reacted with ethanol, iodine and red phosphorus, but the reaction is slow, and it needs to be heated in a reflux device for several hours.

Second, supplies:

flask, straight condenser, beaker, red phosphorus, alcohol, iodine crystals, zeolite, 5% NaOH solution, anhydrous calcium chloride.

Third, the operation:

2 g of red phosphorus and 25 ml of alcohol were added to a 125 ml flask, and 18 g of finely divided iodine crystals were added in portions under shaking, followed by the addition of 3 zeolites. A straight condenser was placed on the flask and allowed to reflux for half an hour by heating in a water bath. After the reaction is completed, the mixture is cooled, and the reflux straight condenser is discharged, and then the condenser is replaced with a common distillation apparatus. It should be noted that the receiver should be filled in a cold water bath to prevent the produced iodoethane from being volatilized. The iodoethane was distilled off in a boiling water bath. The distillate can be transferred to a separatory funnel and browned as the liquid contains iodine. First wash the mixed ethanol with distilled water, then wash the free iodine with a small amount of 5% NaOH solution, and dry it with anhydrous calcium chloride in a condenser, then put it on a water bath for distillation, then there is iodine. When ethane is present, a fraction of 70-74 ° C (343-347 K) can be collected.

Pure ethyl iodide is a colorless oily liquid with a boiling point of 72.3 °C.

Remarks:

1. When preparing ethyl iodide, add iodine once. However, the added iodine should not be excessive, and the reaction will be exothermic, which will increase the temperature. Therefore, keep the reactants at 20 ° C to prevent a large amount of volatile substances from being distilled out to cause loss. Iodoethane should be stored in a brown closed bottle to prevent problems with lightening and loss of volatilization.

2. The outlet tube of the distiller should be inserted under the water surface, and always pay attention to prevent back suction.

3. The experiment is not well controlled, and the purity of iodoethane will have an effect. Methyl iodide is a highly toxic substance, and iodoethane also has certain toxicity. Please pay attention to safety protection.
Related News
  • Monoammonium Glycyrrhizinate

    Monoammonium Glycyrrhizinate

    April 29, 2019CAS: 53956-04-0English name: Monoammonium GlycyrrhizinateThe nature and use of glycyrrhizic acidLicorice is the root of leguminous plants, mainly produced in Mongolia, Shanxi, Gansu, Ningxia and Xinji...view
  • Market Application Direction of Glycolic Acid

    Market Application Direction of Glycolic Acid

    March 13, 20191.Chemical cleaningAs an organic acid, glycolic acid has a good cleaning function for certain metal scales. Since glycolic acid does not contain chloride ions, it is extremely corrosive to equipment m...view
  • Application of Expandable Microspheres

    Application of Expandable Microspheres

    April 29, 2019Expanded microspheres (also known as foamed microspheres) are high molecular polymers. Its outer shell is made of a high molecular polymer (acrylic eye copolymer) which is a hydrocarbon inside. In the...view
  • 2017 Group Tour in Gansu

    2017 Group Tour in Gansu

    January 30, 2018As an annual welfare practice, NCMC 2017’s 5 day company tour from Nanjing to Gansu started in Sept. 1, 2017. The main purpose is to enrich corporate culture, relieve work stress, enchance group sens...view
  • 79th API China

    79th API China

    January 31, 2018November 15-17, 2017Xiamen International Convention and Exhibition CenterAPI China is China's leading exhibition for the pharmaceutical manufacturing sector covering the complete spectrum of products ...view
  • What is GLycolic Acid?

    What is GLycolic Acid?

    March 13, 2019We 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, lact...view
  • TEL:+86-25-52337978
  • EMAIL: info@njchm.com
  • ADDRESS:12/F, Block B, Technology and Innovation Building, Nanjing University of Technology, No.5 New Model Road, Nanjing 210009, China