WO2015194963A1 - Process for producing soda ash - Google Patents

Process for producing soda ash Download PDF

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Publication number
WO2015194963A1
WO2015194963A1 PCT/NO2014/050104 NO2014050104W WO2015194963A1 WO 2015194963 A1 WO2015194963 A1 WO 2015194963A1 NO 2014050104 W NO2014050104 W NO 2014050104W WO 2015194963 A1 WO2015194963 A1 WO 2015194963A1
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WIPO (PCT)
Prior art keywords
process according
soda ash
sodium hydroxide
flue gas
carbon dioxide
Prior art date
Application number
PCT/NO2014/050104
Other languages
French (fr)
Inventor
Mohammed Olfi
Original Assignee
Engsl Minerals Dmcc
Enpro
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Priority to PCT/NO2014/050104 priority Critical patent/WO2015194963A1/en
Publication of WO2015194963A1 publication Critical patent/WO2015194963A1/en

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    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
    • C01D7/00—Carbonates of sodium, potassium or alkali metals in general
    • C01D7/07—Preparation from the hydroxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/62—Carbon oxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/96—Regeneration, reactivation or recycling of reactants
    • B01D53/965—Regeneration, reactivation or recycling of reactants including an electrochemical process step
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B1/00—Electrolytic production of inorganic compounds or non-metals
    • C25B1/01—Products
    • C25B1/34—Simultaneous production of alkali metal hydroxides and chlorine, oxyacids or salts of chlorine, e.g. by chlor-alkali electrolysis
    • C25B1/46—Simultaneous production of alkali metal hydroxides and chlorine, oxyacids or salts of chlorine, e.g. by chlor-alkali electrolysis in diaphragm cells
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B15/00—Operating or servicing cells
    • C25B15/08—Supplying or removing reactants or electrolytes; Regeneration of electrolytes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/30—Alkali metal compounds
    • B01D2251/304—Alkali metal compounds of sodium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/60—Inorganic bases or salts
    • B01D2251/604—Hydroxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
    • B01D2252/10—Inorganic absorbents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/50—Carbon oxides
    • B01D2257/504—Carbon dioxide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/02—Other waste gases
    • B01D2258/0283—Flue gases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/77—Liquid phase processes
    • B01D53/78—Liquid phase processes with gas-liquid contact
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
    • Y02C20/00—Capture or disposal of greenhouse gases
    • Y02C20/40—Capture or disposal of greenhouse gases of CO2
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/151—Reduction of greenhouse gas [GHG] emissions, e.g. CO2

Definitions

  • the present invention relates to an energy-efficient process for producing soda ash (Na 2 C0 3 ) using aqueous sodium hydroxide (NaOH) and carbon dioxide contained in industrial flue gas as starting materials.
  • the process proceeds by starting with an aqueous sodium chloride solution (NaCI (aq)) which is electrolyzed for producing sodium hydroxide and gaseous chloride and hydrogen in an ion ex- change membrane electrolyzer, whereby said gaseous hydrogen and chloride is removed, and wherein said produced sodium hydroxide is supplied to a column reactor wherein said sodium hydroxide is intimately mixed with said flue gas carbon dioxide for producing water and said soda ash, as indicated in the following claim 1. Background for the invention
  • Flue gas containing carbon dioxide is considered a waste product being emitted from industrial processes such as power plants, industrial machines powered by fossil fuel such as gasoline or oil.
  • Carbon dioxide has been proven to be a green- house gas and a pollutant responsible for inter alia global heating. It is thus of importance to purify flue gas restricting the emission of carbon dioxide.
  • the purification and removal of the relevant flue gas/exhaust gas should be conducted in an economic fashion both from an energy and monetary point of view.
  • the purification could be conducted both in an energy-efficient manner and also be providing an end product that is valuable on the market as well.
  • one of the end products of the process according to the present invention is soda ash or sodium carbonate. Soda ash is valuable on the market inter alia as an additive in the produc- tion of glass where sodium carbonate acts as a flux for silica, lowering the melting point of the mixture of the glass elements to a manageable temperature range of the melt without the addition of specialized materials.
  • This "soda glass” is mildly water soluble, so calcium carbonate is added to the pre-melt mixture to make the produced glass insoluble.
  • Sodium carbonate is also used as a relatively strong base in various settings.
  • sodium carbonate is used as a pH regulator to maintain stable alkaline conditions necessary for the action of the majority of photographic film developing agents in settings wherein chemical film development is used.
  • soda ash is a common additive in municipal pools used to neutralize the corrosive effects of chlorine and raise pH.
  • sodium carbonate is in chemistry processes used as an electrolyte. This is because electrolytes are usually salt-based, and sodium carbonate acts as a very good conductor in the process of electrolysis. Additionally, unlike chloride ions, which form chlorine gas, carbonate ions are not corrosive to the anodes. Sodium carbonate is also used as a primary standard for acid-base titrations because it is solid and air-stable, making it easy to weight accurately.
  • soda ash is used as a water softener in laundering.
  • Sodium carbonate competes with magnesium and calcium ions in hard water and prevents them from bonding with the detergent being used.
  • Sodium carbonate can be used to remove grease, oil and wine stains.
  • Sodium carbonate is also used as a descaling agent in boilers such as those found in coffee pots and espresso machines.
  • sodium carbonate (often under a name such as soda ash fixative or soda ash activator) is used to ensure proper chemical bonding of the dye with cellulose (plant) fibers, typically before dyeing (for tie dyes), mixed with the dye (for dye painting) or after dyeing (form immersion dyeing).
  • Sodium carbonate also finds its use in, among others, the paper-making industry for separating lignin from cellulose, in fire extinguishers and for removing sulfur dioxide from flue gases in power stations, this becoming more common, especially where stations have to meet stringent emission controls.
  • Soda ash has previously mainly been produced by the known Solvay process also known as the ammonia-soda process.
  • the Solvay process results in soda ash starting from brine and limestone through the overall process:
  • Sodium carbonate may alternately be produced through processes known as Leblanc process or Hou's process, although these processes are not particularly efficient. However, none of these processes are linked to the purification of flue gases/exhaust gases by removing carbon dioxide.
  • the present invention is, as stated supra, in one aspect concerned with a process for producing soda ash.
  • Said process for producing soda ash is performed in an ion exchange membrane electrolyzer, preferably by capturing carbon dioxide gas from the flue gas of a power plant.
  • the process according to the present invention is in one aspect a process for producing soda ash (Na 2 C0 3 ) from the reactants aqueous sodium hydroxide
  • Sodium hydroxide is produced by the ion exchange membrane electrolysis of purified sodium chloride solution.
  • the sodium carbonate solution is evaporated, crystallized and dried to produce sodium carbonate crystals.
  • the solution of sodium chloride used in the process according to the present invention may be sea water.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Analytical Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Metallurgy (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Inorganic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Treating Waste Gases (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)

Abstract

Soda ash (Na2CO3) may be produced through an energy efficient process using the reactants aqueous sodium hydroxide (NaOH (aq)) and flue gas containing carbon dioxide (CO2) from power plant through a two-step process including electrolyzing aqueous sodium chloride solution (NaCl (aq)) and the supplying electrical power for producing sodium hydroxide and hydrogen chloride in an ion exchange membrane electrolyzer while removing produced gaseous hydrogen and chlorine, combined with a reaction carried out in a packed column between said produced sodium hydroxide and said supplied flue gas containing gaseous carbon dioxide for obtaining said soda ash.

Description

PROCESS FOR PRODUCING SODA ASH
Ambit of the invention The present invention relates to an energy-efficient process for producing soda ash (Na2C03) using aqueous sodium hydroxide (NaOH) and carbon dioxide contained in industrial flue gas as starting materials. The process proceeds by starting with an aqueous sodium chloride solution (NaCI (aq)) which is electrolyzed for producing sodium hydroxide and gaseous chloride and hydrogen in an ion ex- change membrane electrolyzer, whereby said gaseous hydrogen and chloride is removed, and wherein said produced sodium hydroxide is supplied to a column reactor wherein said sodium hydroxide is intimately mixed with said flue gas carbon dioxide for producing water and said soda ash, as indicated in the following claim 1. Background for the invention
Flue gas containing carbon dioxide is considered a waste product being emitted from industrial processes such as power plants, industrial machines powered by fossil fuel such as gasoline or oil. Carbon dioxide has been proven to be a green- house gas and a pollutant responsible for inter alia global heating. It is thus of importance to purify flue gas restricting the emission of carbon dioxide.
Also, in one aspect of the invention, the purification and removal of the relevant flue gas/exhaust gas should be conducted in an economic fashion both from an energy and monetary point of view. Thus, it is of value if the purification could be conducted both in an energy-efficient manner and also be providing an end product that is valuable on the market as well. In this respect one of the end products of the process according to the present invention is soda ash or sodium carbonate. Soda ash is valuable on the market inter alia as an additive in the produc- tion of glass where sodium carbonate acts as a flux for silica, lowering the melting point of the mixture of the glass elements to a manageable temperature range of the melt without the addition of specialized materials. This "soda glass" is mildly water soluble, so calcium carbonate is added to the pre-melt mixture to make the produced glass insoluble.
Sodium carbonate is also used as a relatively strong base in various settings. For example sodium carbonate is used as a pH regulator to maintain stable alkaline conditions necessary for the action of the majority of photographic film developing agents in settings wherein chemical film development is used.
Also soda ash is a common additive in municipal pools used to neutralize the corrosive effects of chlorine and raise pH.
In cooking sodium carbonate is used in place of sodium hydroxide for leying, particularly in the making of German pretzels and lye rolls. These dishes are treated with a solution of an alkaline substance to change the pH of the surface of the food and improve browning.
Among other uses, sodium carbonate is in chemistry processes used as an electrolyte. This is because electrolytes are usually salt-based, and sodium carbonate acts as a very good conductor in the process of electrolysis. Additionally, unlike chloride ions, which form chlorine gas, carbonate ions are not corrosive to the anodes. Sodium carbonate is also used as a primary standard for acid-base titrations because it is solid and air-stable, making it easy to weight accurately.
In the domestic area soda ash is used as a water softener in laundering. Sodium carbonate competes with magnesium and calcium ions in hard water and prevents them from bonding with the detergent being used. Sodium carbonate can be used to remove grease, oil and wine stains. Sodium carbonate is also used as a descaling agent in boilers such as those found in coffee pots and espresso machines.
In dyeing with fiber-active dyes, sodium carbonate (often under a name such as soda ash fixative or soda ash activator) is used to ensure proper chemical bonding of the dye with cellulose (plant) fibers, typically before dyeing (for tie dyes), mixed with the dye (for dye painting) or after dyeing (form immersion dyeing).
Sodium carbonate also finds its use in, among others, the paper-making industry for separating lignin from cellulose, in fire extinguishers and for removing sulfur dioxide from flue gases in power stations, this becoming more common, especially where stations have to meet stringent emission controls. Prior art
Soda ash has previously mainly been produced by the known Solvay process also known as the ammonia-soda process. The Solvay process results in soda ash starting from brine and limestone through the overall process:
2 NaCI + CaC03 -> Na2C03 + CaCI2
However, the implementation of this global, overall reaction is intricate involving four different, interacting separate chemical reactions.
Sodium carbonate may alternately be produced through processes known as Leblanc process or Hou's process, although these processes are not particularly efficient. However, none of these processes are linked to the purification of flue gases/exhaust gases by removing carbon dioxide.
From US patent 7.727.374 B2 it is known a common way of sequestering gaseous carbon dioxide through dissolving such carbon dioxide in water to produce carbonic acid, and reacting this carbonic acid with sodium hydroxide to produce carbonate and bicarbonate sodium salts. The process according to this prior art is normally conducted in a bubble column.
General disclosure of the instant invention
The present invention is, as stated supra, in one aspect concerned with a process for producing soda ash. Said process for producing soda ash is performed in an ion exchange membrane electrolyzer, preferably by capturing carbon dioxide gas from the flue gas of a power plant.
As mentioned supra, one of the ways to produce soda ash is through the Solvay process. However, the energy consumption of the Solvay process is 13,6 GJ/ton of soda ash (source: EU Commission : "Reference document on Best Available Techniques for the Manufacture of Large Volume Inorganic Chemicals . Solids and Others industry, August 2007, page 32 and page 53), which is equal to 3,77 MW/ton of soda ash. This includes the electrical and thermal energy required for the process, but excludes power generation and cooling systems. Emission of C02 against the 3.77 MW/ton of soda ash energy is 1,72 tons (C02 emission factor is 0,35 tons of CCV MW for gas fired power plant). 0,4 tons of C02 per ton of soda ash is also emitted during the manufacturing process, thus totaling 2.12 tons C02 emission.
The process according to the present invention is in one aspect a process for producing soda ash (Na2C03) from the reactants aqueous sodium hydroxide
(NaOH(aq)), aqueous sodium chloride (NaCI(aq)) and gaseous carbon dioxide (C02(g)) through the combination of:
I. an electrolytical process starting from said aqueous sodium chloride solution (NaCI (aq)) through electrolyzing said sodium chloride with water and the addition of electrical power for producing sodium hydroxide and hydrogen chloride through an electrolytical reaction 2NaCI(aq) + 2 H20 -> H2(g) + Cl2(g) + 2
NaOH(aq) in an ion exchange membrane electrolyzer removing produced gaseous hydrogen and chlorine, and
II. a reaction between said produced sodium hydroxide and said supplied gaseous carbon dioxide through the chemical reaction 2 NaOH(aq) + C02(g) -> Na2C03(s) + H20(l). In this two-step process, wherein each step may be conducted separately or in combination in an ion exchange membrane electrolyzer, the consumed energy is less than in the Solvay process, in one example or embodiment the consumed energy being 2,86 MW/ton of soda ash, thus minimum 24% lower, and this too for a non-comparable production plant size. In such a process the C02 emission against this energy being 1,0 ton (C02 emission factor being 0,35 tons CCVMW for a gas fired power plant). 0,833 ton of C02 is captured by the process according to the invention to produce soda ash, and the final emission of C02 from the process according to the invention is 0,17 tons which represents 80% less than in the Solvay process.
In the two-step process, an ISO 14000-series Life-Cycle Analysis has been undertaken, which shows compelling Environmental Life-Cycle results of the invention, compared with reference plant in Europe. The Life-Cycle results are as follows:
Figure imgf000006_0001
2 NaOH (aq) + C02(g) - > Na2C03(aq) + H20(l)
Sodium hydroxide is produced by the ion exchange membrane electrolysis of purified sodium chloride solution. The sodium carbonate solution is evaporated, crystallized and dried to produce sodium carbonate crystals.
The process according to the present invention may be presented through the following sections:
1. Energy efficient process for the production of soda ash (Na2C03) using the reactants aqueous sodium hydroxide (NaOH (aq)) and flue gas containing carbondioxide from power plant through the combination of:
I. an electrolytical process starting from said aqueous sodium chloride solution (NaCI (aq)) through electrolyzing said sodium chloride with water and the addition of electrical power for producing sodium hydroxide and hydrogen chloride through the electrolytical reaction 2 NaCI(aq) + 2 H20(l) -> H2(g) + Cl2(g) + 2 NaOH(aq) in an ion exchange membrane electrolyzer removing produced gaseous hydrogen and chlorine, and
II. a reaction carried out in a packed column between said produced sodium hydroxide and said supplied flue gas containing gaseous carbon dioxide through the chemical reaction
2 NaOH(aq) + C02(g) -> Na2C03 (s) + H20 (I)
providing an overall reaction of 2 NaOH(aq) + C02(g) -> Na2C03(aq) +
H20(l) 2. Process according to section 1, the reaction is carried out at 0.5 barg in packed column reactor
3. Process according to section 2, where the carbon dioxide conversion efficiency 90%.
4. Process according to any of the sections 1 - 3, wherein said sodium hydroxide solution of 29% concentration reacts with flue gas containing 7.7 wt% carbon dioxide.
5. Process according to section 4, wherein sodium carbonate solution of 28.8wt% at the reactor outlet
6. Process according to any of the sections 1 - 5, wherein reactor pH at the top of column is 14.05 and pH at the bottom of column is 11.70
7. Process according to any of the sections 1 - 6, wherein carbonator reactor pH is controlled by flow rate of flue gas containing C02 8. Process according to sections 1-7, wherein the electrical energy provided in step I. for producing said sodium hydroxide is 2152 Kwh per ton of sodium hydroxide
9. Process according to any of the sections 1 - 9, wherein the electrical energy provided in the production of soda ash is no more than 2.86 MWh per ton of soda ash
11. Process according to any of the sections 1 - 10, wherein said process of steps sequester 90% of C02 from the flue gas.
12. Process according to any of the sections 1 -11, wherein the said soda ash production emits no C02 to the environment where as conventional process of Soda ash product emits 0.5-1.0 tons per ton of soda ash. The solution of sodium chloride used in the process according to the present invention may be sea water.

Claims

C l a i m s
1. Energy efficient process for the production of soda ash (Na2C03) using the reactants aqueous sodium hydroxide (NaOH (aq)) and flue gas containing carbondioxide from power plant through the combination of:
I. an electrolytical process starting from said aqueous sodium chloride solution (NaCI (aq)) through electrolyzing said sodium chloride with water and the addition of electrical power for producing sodium hydroxide and hydrogen chloride through the electrolytical reaction 2 NaCI(aq) + 2 H20(l) -> H2(g) + Cl2(g) + 2 NaOH(aq) in an ion exchange membrane electrolyzer removing produced gaseous hydrogen and chlorine, and
II. a reaction carried out in a packed column between said produced sodium hydroxide and said supplied flue gas containing gaseous carbon dioxide through the chemical reaction
2 NaOH(aq) + C02(g) -> Na2C03 (aq) + H20 (I)
providing an overall reaction of 2 NaOH(aq) + C02(g) -> Na2C03(aq) +
H20(l).
2. Process according to claim 1, the reaction is carried out at 0.5 barg in packed column reactor.
3. Process according to claim 2, where the carbon dioxide conversion efficiency is more than 90%.
4. Process according to any of the claims 1 - 3, wherein said sodium hydroxide solution of 29% concentration reacts with flue gas containing 7.7 wt % carbon dioxide.
5. Process according to claim 4, wherein sodium carbonate solution of 31wt% at the reactor outlet.
6. Process according to any of the preceding claims, wherein reactor pH at the top of column is 14.05 and pH at the bottom of column is 11.70.
7. Process according to any of the preceding claims, wherein carbonator reactor pH is controlled by flow rate of flue gas containing C02.
8. Process according to claims 1 - 7, wherein the electrical energy provided in step I. for producing said sodium hydroxide is 2152 Kwh per ton of sodium hydroxide.
9. Process according to any of the claims 1 - 8, wherein the electrical energy provided in the production of soda ash is no more than 2.86 MWh per ton of soda ash.
10. Process according to any of the claims 1 - 9, wherein said process of steps sequester 90% of C02 from the flue.
11. Process according to any of the preceding claims, wherein the said soda ash production emits no C02 to the environment where as conventional process of Soda ash product emits 0.5-1.0 tons per ton of soda ash.
PCT/NO2014/050104 2014-06-18 2014-06-18 Process for producing soda ash WO2015194963A1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2736461C1 (en) * 2020-03-20 2020-11-17 Общество с ограниченной ответственностью "Сибирская содовая компания" Method of producing soda ash from natural soda-containing material
US11305228B2 (en) * 2019-08-29 2022-04-19 Kenji SORIMACHI Method for fixing carbon dioxide, method for producing fixed carbon dioxide, and fixed carbon dioxide production apparatus
US11484831B1 (en) * 2021-08-18 2022-11-01 Eric Phillips Direct air capture system removing carbon dioxide

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0175524A2 (en) * 1984-09-19 1986-03-26 Imperial Chemical Industries Plc Electrolysis of alkali metal chloride solution
WO2006034339A1 (en) * 2004-09-23 2006-03-30 Joe David Jones Removing carbon dioxide from waste streams through co-generation of carbonate and/or bicarbonate minerals
EP1900688A1 (en) * 2006-09-14 2008-03-19 SOLVAY (Société Anonyme) Method for obtaining sodium carbonate crystals
WO2014006742A1 (en) * 2012-07-06 2014-01-09 株式会社日立製作所 Device for treating saline wastewater and method for treating same
US8741256B1 (en) * 2009-04-24 2014-06-03 Simbol Inc. Preparation of lithium carbonate from lithium chloride containing brines

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0175524A2 (en) * 1984-09-19 1986-03-26 Imperial Chemical Industries Plc Electrolysis of alkali metal chloride solution
WO2006034339A1 (en) * 2004-09-23 2006-03-30 Joe David Jones Removing carbon dioxide from waste streams through co-generation of carbonate and/or bicarbonate minerals
US7727374B2 (en) 2004-09-23 2010-06-01 Skyonic Corporation Removing carbon dioxide from waste streams through co-generation of carbonate and/or bicarbonate minerals
EP1900688A1 (en) * 2006-09-14 2008-03-19 SOLVAY (Société Anonyme) Method for obtaining sodium carbonate crystals
US8741256B1 (en) * 2009-04-24 2014-06-03 Simbol Inc. Preparation of lithium carbonate from lithium chloride containing brines
WO2014006742A1 (en) * 2012-07-06 2014-01-09 株式会社日立製作所 Device for treating saline wastewater and method for treating same

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"Reference document on Best Available Techniques for the Manufacture of Large Volume Inorganic Chemicals", SOLIDS AND OTHERS INDUSTRY, August 2007 (2007-08-01), pages 32,53

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11305228B2 (en) * 2019-08-29 2022-04-19 Kenji SORIMACHI Method for fixing carbon dioxide, method for producing fixed carbon dioxide, and fixed carbon dioxide production apparatus
RU2736461C1 (en) * 2020-03-20 2020-11-17 Общество с ограниченной ответственностью "Сибирская содовая компания" Method of producing soda ash from natural soda-containing material
US11484831B1 (en) * 2021-08-18 2022-11-01 Eric Phillips Direct air capture system removing carbon dioxide

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