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Preparation method of crystal glycerin

A technology of glycerin and crystals, which is applied in the field of crystal glycerin preparation, and can solve the problems of complicated procedures, high energy consumption, and high cost

Inactive Publication Date: 2017-09-01
周逸
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Regardless of whether glycerin is produced by hydrolysis of oil, or synthetic glycerin is produced from propylene, and glycerin produced by fermentation of starch or sugar, in the subsequent concentration, distillation and purification, the procedures are complicated, the energy consumption is large, and the cost is high.

Method used

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Embodiment Construction

[0008] Weigh 100 grams of glycerin and put it into a 1000 milliliter beaker, add 300 milliliters of water, and stir well. Under stirring, 15 milliliters of 10% copper (zinc) chloride aqueous solution was slowly added, left for half an hour, then heated and concentrated to dryness to obtain bright blue copper crystals. Add 500ml of water and stir to fully dissolve. into CO 2 until the blue color of the aqueous solution fades away. Take a few drops of aqueous solution with a straw and put it on a small porcelain plate, add 1 drop of dilute Na 2 S solution, if no brown precipitate appears, it can be regarded as Cu 2+ (Zn 2+ ) all generate CuCO 3 (ZnCO 3 )precipitation. Filter to remove the precipitate. The precipitate is dissolved with dilute hydrochloric acid, and the copper (zinc) solution is recovered for future use.

[0009] Add dilute Na to the above blue copper solution 2 CO 3 solution, also removes Cu 2+ or Zn 2+ .

[0010] To remove Cu 2+ (Zn 2+ ) above so...

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Abstract

The invention discloses a preparation method of crystal glycerin. The method comprises the steps of forming copper (zinc) complex ions by a water-soluble copper (zinc) salt and glycerin, drying the solution by distillation to obtain a copper (zinc) glycerin complex; and dissolving by using water, introducing CO2 or adding Na2CO3 to remove copper (zinc) and drying by distillation to obtain the crystal glycerin. According to the preparation method, the process can be simplified when the glycerin is produced, the cost is reduced, the purity is improved and the crystal glycerin is convenient to store and transport. The crystal glycerin also has important significance in national defense and military. When a nitroglycerine explosive is manufactured through nitrification, the method is easy to control and the brisance is multiplied. In addition, the glycerin has three hydroxyl groups with active chemical property, so that the glycerin can be applied to research and development of a solid rocket propellant.

Description

technical field [0001] The patent of the present invention relates to the preparation method of crystal glycerin. Background technique [0002] Regardless of whether glycerin is produced by hydrolysis of oil, or synthetic glycerin is produced from propylene, and glycerin produced by fermentation of starch or sugar, the procedures for subsequent concentration, distillation, and purification are complicated, energy-intensive, and costly. [0003] Several processes can be omitted if the technology of the present invention is used. Low energy consumption, high purity and low cost. Contents of the invention [0004] In the present invention, copper salt solution or zinc salt solution is added to dilute glycerin solution to generate copper (or zinc) glycerol complex ions, and then concentrated to form crystal complex. [0005] Technical solutions [0006] Put a water-soluble copper (or zinc) salt, such as CuSO 4 (ZnSO 4 ), CuCl 2 (ZnCl 2 ), Cu(NO 3 ) 2 (Zn(NO 3 ) 2 ),...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C29/74C07C31/22C07C29/78
CPCC07C29/74C07C29/78C07C31/225
Inventor 周逸
Owner 周逸
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