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Process for jointly obtaining a chlorine derivative and crystals of sodium carbonate

A technology of sodium carbonate and derivatives, which is applied in the field of joint acquisition of chlorine derivatives and sodium carbonate crystals, can solve problems such as power consumption, and achieve the effects of reducing emissions and reducing costs

Inactive Publication Date: 2008-03-05
SOLVAY SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this known method consumes a lot of electricity, the production of which in a thermal power plant generates a lot of carbon dioxide

Method used

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  • Process for jointly obtaining a chlorine derivative and crystals of sodium carbonate

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Embodiment Construction

[0036] The device shown schematically in the figure includes an electrolytic cell (1), a carbonation tower (2), an evaporative crystallizer (3), a rotary drying chamber (4), a device for simultaneous electricity and steam generation (5) and vinyl chloride production unit (6).

[0037] The electrolytic cell (1) is a cation selective membrane type. It comprises an anode compartment and a cathode compartment separated from the anode compartment by a cation-selectively permeable membrane. Batteries can be unipolar or bipolar.

[0038] Cells with cation-selectively permeable membranes are well known in the field of electrolysis technology and are widely used for the industrial production of aqueous sodium hydroxide solutions from brine or aqueous sodium chloride.

[0039]The plant for simultaneous electricity and steam generation typically includes a gas turbine (7) fed with natural gas (8), an AC generator (9) and a boiler (10) fed with gas from the gas turbine. An AC generator...

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Abstract

An aqueous solution of sodium chloride is electrolyzed in a cell (1) with an ion permselective membrane to produce, on the one hand, chlorine (16) which is converted in a chlorine production unit (6) and, on the other, an aqueous sodium hydroxide solution (19), which is carbonated using a flue gas (13) from an electricity and steam cogeneration unit (5), and the resulting carbonated solution (18) is evaporated to produce sodium carbonate crystals (21).

Description

technical field [0001] The present invention relates to an integrated method for the joint acquisition of chlorine derivatives and sodium carbonate crystals. More particularly, the present invention relates to an integrated process for the joint acquisition of chlorine derivatives and sodium carbonate crystals, the purpose of which is to reduce the amount of carbon dioxide emitted into the environment. Background technique [0002] The problems associated with the overproduction of carbon dioxide by human industry are now well known. It is generally accepted that controlling and actually reducing these emissions is necessary for the sustainable development of the planet. [0003] Furthermore, alkali metal carbonates, especially sodium carbonate, are very common industrial products with many applications. In the glass industry, sodium carbonate is an essential ingredient that makes glass easier to process. The detergent, textile, and pulp and paper industries are also exam...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/46C01D7/07H01M8/06
CPCC01D7/07C25B1/46Y02P20/129Y02E60/50H01M8/04
Inventor 弗朗西斯·库斯特里米歇尔·汉泽
Owner SOLVAY SA
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