NO810316L - PREVENTION FOR CONCENTRATION OF LOW PERCENTAGE OF NON-SOUND LODGE - Google Patents
PREVENTION FOR CONCENTRATION OF LOW PERCENTAGE OF NON-SOUND LODGEInfo
- Publication number
- NO810316L NO810316L NO810316A NO810316A NO810316L NO 810316 L NO810316 L NO 810316L NO 810316 A NO810316 A NO 810316A NO 810316 A NO810316 A NO 810316A NO 810316 L NO810316 L NO 810316L
- Authority
- NO
- Norway
- Prior art keywords
- caustic soda
- percentage
- low
- concentration
- amalgam
- Prior art date
Links
- 230000002265 prevention Effects 0.000 title 1
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 80
- 235000011121 sodium hydroxide Nutrition 0.000 claims description 27
- 229910001868 water Inorganic materials 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 229910000497 Amalgam Inorganic materials 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 8
- 238000005868 electrolysis reaction Methods 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 238000003776 cleavage reaction Methods 0.000 claims description 4
- 239000012528 membrane Substances 0.000 claims description 4
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims description 4
- 229910052753 mercury Inorganic materials 0.000 claims description 4
- 230000007017 scission Effects 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D1/00—Oxides or hydroxides of sodium, potassium or alkali metals in general
- C01D1/04—Hydroxides
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
- Liquid Crystal Substances (AREA)
Description
Oppfinnelsen vedrører en fremgangsmåte til oppkonsentrering av lavprosentig natronlut. Ved lavprosentig natronlut er det å forstå slike med konsentrasjonsområde Era ca. 10-45%. The invention relates to a method for concentrating low-percentage caustic soda. Low-percentage caustic soda means those with a concentration range Era approx. 10-45%.
Natronlut i en 10-45% i konsentrasjon er vanligvis av transportomkostningsgrunner et knapt markedsførbart produkt, men de må konsentreres til 50%. Konsentreringen foregår vanligvis under anvendelse.av varmeenergi i form av damp. Foruten problemet ved varmebehov nødvendiggjøres ved oppkonsentreringen dessuten anvendelse av korrosjonsbestandig material med høye omkostninger, da det overskytende vann bare kan avdrives ved temperatur i området på over 100°C. Skal det avdrevede vann gjenvinnes, må det anvendes varmeutveks-lere og kjølemedier stilles i beredskap. Caustic soda in a 10-45% concentration is usually a hardly marketable product due to transport costs, but they must be concentrated to 50%. The concentration usually takes place using heat energy in the form of steam. In addition to the problem of heat demand, the concentration also necessitates the use of corrosion-resistant material with high costs, as the excess water can only be drained off at temperatures in the range of over 100°C. If the drained water is to be recovered, heat exchangers must be used and refrigerants must be kept on standby.
Hensikten med oppfinnelsen er å redusere, h.h.:v. The purpose of the invention is to reduce, respectively:
.eliminere de nevnte problemer.-.eliminate the mentioned problems.-
Oppgaven løses i følge oppfinnelsen ved at den lavprosentige natronlut tilføres til en kvikksølvamalgam-spaltning, idet vanndelen av natronluten minst gir en del av reaksjonsvannet for amalganspaltningen. According to the invention, the task is solved by feeding the low-percentage caustic soda to a mercury-amalgam cleavage, the water part of the caustic soda providing at least part of the reaction water for the amalgam cleavage.
Spesielt fordelaktig er fremgangsmåten i følge oppfinnelsen når den lavprosentige natronlut stammer fra en membranselleelektrolyse, og den oppkonstrueres- ved hjelp av den nye forholdsregel til minst 50%. The method according to the invention is particularly advantageous when the low-percentage caustic soda originates from a membrane cell electrolysis, and it is built up - using the new precautionary rule - to at least 50%.
I følge en ytterligere utforming av oppfinnelsen tilføres den lavprosentige natronlut fra membranselleelektro-lysen uten foregående avkjøling til amalgamspaltningen. According to a further design of the invention, the low-percentage caustic soda from the membrane cell electrolysis is supplied without prior cooling to the amalgam splitting.
De med oppfinnelsen oppnådde fordeler består spesielt i at for oppkonsentreringen av den lavprosent i natronlut i minst 50 vekt % er det ikke nødvendig med noen fremmedvarme. Dessuten kreves det ingen separate-apparater av korrosjonsbestandig material. The advantages achieved with the invention consist in particular in the fact that for the concentration of the low percentage in caustic soda to at least 50% by weight, no extraneous heat is necessary. Furthermore, no separate devices made of corrosion-resistant material are required.
Fremgangsmåten forklares nærmere ved hjelp av følgende eksempel i forbindelse med tegningen som viser et arbeidsskjerna og en foretrukket utførelsesform. The method is explained in more detail using the following example in connection with the drawing showing a working core and a preferred embodiment.
I anlegg 1 til elektrolyse av vanndig natrium-klorid som er utrustet med membranseller frembringes pr. dag 333,3 t NaOH som 30%-ig oppløsning. Denne mengde inneholder 100 t NaOH og 233,3 t H20. For ut fra denne natronlut å fremstille en natronlut med 50% NaOH måtte det fordampes 133,3 t vann. In plant 1 for the electrolysis of aqueous sodium chloride, which is equipped with membrane cells, per day 333.3 t NaOH as a 30% solution. This amount contains 100 t NaOH and 233.3 t H20. In order to produce a caustic soda with 50% NaOH from this caustic soda, 133.3 t of water had to be evaporated.
I følge oppfinnelsen gjennomføres ikke denne fordampning. Da et anlegg 2 til frembringelse av klor, hydro-gen og natronlut er tilstede på basis av en kvikksølvselle-elektrolyse,gåes det følgende vei: Kvikksølvselleelektro-lysen 2 inneholder bl. a. amalgamspalter 3, hvortil vann er å tilføres som reaksjonsvann. Således blir det pr. i dag for omsetning av amalgam i 1000 t NaOH som 50%-ig oppløsning nød-vendig 725 t H20,hvorav 225 t H20 forbrukes for selve reak-sjonen HgxNa + H20 = xHg + NaOH + ^H2 . According to the invention, this evaporation is not carried out. Since a facility 2 for the production of chlorine, hydrogen and caustic soda is present on the basis of a mercury cell electrolysis, the following path is followed: The mercury cell electrolysis 2 contains, among other things, a. amalgam gaps 3, to which water is to be supplied as reaction water. Thus, it will be per today, for the conversion of amalgam in 1000 t of NaOH as a 50% solution, 725 t of H20 are necessary, of which 225 t of H20 are consumed for the actual reaction HgxNa + H20 = xHg + NaOH + ^H2 .
Ved tilføring av 333,3 t NaOH som 30%-ig opp-løsning med 233,3 t H20, d.v.s. 133,3 t H20 overskuddsvann må det bare tilføres i tillegg 725 t H20 - 133,-3 t H2O = 591,7 t H20 pr. dag til amalgamspalter 3. Av amalgamspalte 3 uttas tilsammen 600 t NaOH beregnet som 100%-ig, d.v.s. 1200. t NaOH 50%-ig. By adding 333.3 t NaOH as a 30% solution with 233.3 t H20, i.e. 133.3 t H20 excess water only needs to be added in addition 725 t H20 - 133.-3 t H2O = 591.7 t H20 per day to amalgam pit 3. A total of 600 t of NaOH calculated as 100% is removed from amalgam pit 3, i.e. 1200. t NaOH 50%-ig.
Som det er å slutte av det overnevnte, inn-spares ved denne fremgangsmåte inndampningsenergien for 133,3 t vann fra 30% til 50% lut. As can be concluded from the above, this method saves the evaporation energy for 133.3 t of water from 30% to 50% lye.
Claims (4)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3008104 | 1980-03-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NO810316L true NO810316L (en) | 1981-09-04 |
Family
ID=6096129
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO810316A NO810316L (en) | 1980-03-03 | 1981-01-29 | PREVENTION FOR CONCENTRATION OF LOW PERCENTAGE OF NON-SOUND LODGE |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0035128A1 (en) |
| JP (1) | JPS56134518A (en) |
| DD (1) | DD156701A5 (en) |
| FI (1) | FI810644L (en) |
| NO (1) | NO810316L (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0413385A1 (en) * | 1989-08-17 | 1991-02-20 | Solvay | Process for manufacturing a sodium hydroxide caustic solution |
| CN105905925B (en) * | 2016-06-06 | 2018-02-16 | 五矿（湖南）铁合金有限责任公司 | A kind of method of ferromanganese smelting dedusting ash and waste residue comprehensively recovering valuable metal |
-
1981
- 1981-01-29 NO NO810316A patent/NO810316L/en unknown
- 1981-02-06 EP EP81100842A patent/EP0035128A1/en not_active Withdrawn
- 1981-03-02 DD DD81227975A patent/DD156701A5/en unknown
- 1981-03-02 FI FI810644A patent/FI810644L/en not_active Application Discontinuation
- 1981-03-03 JP JP2948081A patent/JPS56134518A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| FI810644L (en) | 1981-09-04 |
| EP0035128A1 (en) | 1981-09-09 |
| DD156701A5 (en) | 1982-09-15 |
| JPS56134518A (en) | 1981-10-21 |
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