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Method for producing formic acid through phosphoric acid and sodium formate

A technology of sodium formate and sodium dihydrogen phosphate, applied in carboxylate preparation, organic chemistry, etc., can solve problems such as environmental pollution, achieve the effects of protecting the environment, convenient operation, and promoting comprehensive utilization of resources

Inactive Publication Date: 2007-02-21
HUBEI XINGFA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, sulfuric acid and sodium formate are used to react to produce formic acid. During the reaction, a large amount of carbon dioxide gas is emitted, which pollutes the environment.

Method used

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  • Method for producing formic acid through phosphoric acid and sodium formate

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Experimental program
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Effect test

Embodiment 1

[0014] Such as figure 1 As shown, using the carbon monoxide tail gas in the production of yellow phosphorus as raw material, through purification and desulfurization treatment, the carbon monoxide obtained is synthesized with caustic soda, concentrated crystallization, separation, and drying to obtain sodium formate; first add 600Kg of phosphoric acid in the reactor, and then Then add 600Kg of sodium formate, control the reaction temperature at 40°C, and react under the action of stirring to obtain a solution of formic acid and sodium dihydrogen phosphate, which enters the evaporator through the outlet at the bottom of the reactor. Add 180Kg of phosphorus pentoxide to the top of the tank to remove the water in the solution. After stirring evenly, heat with steam and carry out distillation. Control the distillation temperature at 110°C. The gas phase enters the cooler and is cooled with tap water. The distillate after cooling is For formic acid, the liquid phase is sodium dihyd...

Embodiment 2

[0017] Such as figure 1 As shown, using the carbon monoxide tail gas in the production of yellow phosphorus as raw material, through purification and desulfurization treatment, the carbon monoxide obtained is synthesized with caustic soda, concentrated crystallization, separation, and drying to obtain sodium formate; first add 760Kg of phosphoric acid in the reactor, and then Then add 650Kg of sodium formate, control the reaction temperature at 50°C, and react under the action of stirring to obtain a solution of formic acid and sodium dihydrogen phosphate, which enters the evaporator through the outlet at the bottom of the reactor. Add 200Kg of phosphorus pentoxide to the top of the tank to remove the water in the solution. After stirring evenly, heat with steam and carry out distillation. Control the distillation temperature at 130°C. The gas phase enters the cooler and is cooled with tap water. The distillate after cooling is For formic acid, the liquid phase is sodium dihyd...

Embodiment 3

[0020] Such as figure 1 As shown, using the carbon monoxide tail gas in the production of yellow phosphorus as raw material, through purification and desulfurization treatment, the carbon monoxide obtained is synthesized with caustic soda, concentrated crystallization, separation, and drying to obtain sodium formate; first add 800Kg of phosphoric acid in the reactor, and then Then add 700Kg of sodium formate, control the reaction temperature at 45°C, and react under the action of stirring to obtain a solution of formic acid and sodium dihydrogen phosphate, which enters the evaporator through the outlet at the bottom of the reactor. Add 220Kg of phosphorus pentoxide to the top of the tank to remove the water in the solution. After stirring evenly, heat with steam and carry out distillation. Control the distillation temperature at 140°C. The gas phase enters the cooler and is cooled with tap water. The distillate after cooling is For formic acid, the liquid phase is sodium dihyd...

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Abstract

This invention discloses a method for preparing formic acid from phosphoric acid and sodium formate. The method comprises: reacting CO produced from yellow phosphorus manufacture with caustic soda to obtain sodium formate, then reacting with phosphoric acid, dehydrating with P2O5, and distilling to obtain formic acid. The method can reduce CO2 emission, thus is environmentally friendly. Besides, the method can lower the cost of yellow phosphorus and formic acid manufacture.

Description

technical field [0001] The invention relates to a method for producing formic acid by using carbon monoxide tail gas and phosphoric acid produced in yellow phosphorus electric furnace production, in particular a method for producing formic acid by using phosphoric acid and sodium formate. Background technique [0002] At present, sulfuric acid and sodium formate are used to react to produce formic acid. During the reaction, a large amount of carbon dioxide gas is emitted, which pollutes the environment. Contents of the invention [0003] The purpose of this invention is to provide a method for producing formic acid with phosphoric acid and sodium formate, which uses phosphoric acid instead of sulfuric acid and sodium formate to react, can reduce the discharge of carbon dioxide gas in the reaction, protect the environment, and promote the comprehensive utilization of resources, so that yellow phosphorus The comprehensive produ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C53/02C07C51/02
Inventor 聂佳林李少平杨晓利余有平范守成
Owner HUBEI XINGFA CHEM GRP CO LTD
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