CS261347B1 - Method of active coal production with reduced lead content - Google Patents
Method of active coal production with reduced lead content Download PDFInfo
- Publication number
- CS261347B1 CS261347B1 CS877143A CS714387A CS261347B1 CS 261347 B1 CS261347 B1 CS 261347B1 CS 877143 A CS877143 A CS 877143A CS 714387 A CS714387 A CS 714387A CS 261347 B1 CS261347 B1 CS 261347B1
- Authority
- CS
- Czechoslovakia
- Prior art keywords
- lead content
- zinc
- reduced lead
- coal production
- active coal
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 3
- 239000003245 coal Substances 0.000 title 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 14
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000004090 dissolution Methods 0.000 claims abstract 2
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 claims description 12
- 235000005074 zinc chloride Nutrition 0.000 claims description 6
- 239000011592 zinc chloride Substances 0.000 claims description 6
- 230000004913 activation Effects 0.000 claims 1
- 229910052725 zinc Inorganic materials 0.000 abstract description 6
- 239000011701 zinc Substances 0.000 abstract description 6
- 239000002023 wood Substances 0.000 abstract description 5
- 230000003213 activating effect Effects 0.000 abstract description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 abstract 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 229910052793 cadmium Inorganic materials 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Landscapes
- Carbon And Carbon Compounds (AREA)
Abstract
Při výrobě aktivních uhlí aktivací dřevěných pilin se používá roztok chloridu zinečnatého, který po skončení rozpou- štěcí reakce se cementuje zinkovým prachem.Activating activated carbon wood sawdust is used chloride solution zinc which, after the dissolution of the \ t The reaction reaction is cemented with zinc dust.
Description
Vynález se týká aktivních uhlí vyráběných aktivací dřevěných pilin roztokem chloridu zinečnatého.The invention relates to activated carbon produced by activating wood sawdust with a zinc chloride solution.
Chlorid zinečnatý působí za zvýšené teploty na organickou hmotu dřevěných pilin tak, že ji rozkládá za vzniku uhlíkatého materiálu s bohatě rozvinutou porézní strukturou a velkým vnitřním povrchem zvaným aktivní uhlí.At elevated temperatures, zinc chloride acts on the organic matter of wood sawdust by decomposing it to form a carbonaceous material with a richly developed porous structure and a large inner surface called activated carbon.
Chlorid zinečnatý, jako aktivační činidlo, se používá ve formě impregnačního roztoku pro impregnaci dřevěných pilin. Připravuje se rozpouštěním zinkových odpadů v koncentrované kyselině chlorovodíkové s následným zahuštěním v odpařovacích kotlích. Zinkový odpad však obsahuje řadu jiných kovů (např. Fe, Cd, Cu, Pb), které přes další zásahy v technologickém procesu jako např. extrakce, mletí, praní atd. nejsou z výrobků odstraněny. Vzhledem k tomu, že aktivní uhlí se používá i v potravinářském průmyslu je přítomnost těchto kovů, hlavně olova, zvlášt nežádoucí.Zinc chloride, as an activating agent, is used in the form of an impregnating solution for impregnating sawdust. It is prepared by dissolving zinc wastes in concentrated hydrochloric acid followed by concentration in evaporation boilers. However, zinc waste contains a number of other metals (eg Fe, Cd, Cu, Pb) which, despite further interventions in the process, such as extraction, grinding, washing, etc., are not removed from the products. Since activated carbon is also used in the food industry, the presence of these metals, especially lead, is particularly undesirable.
Uvedený kvalitativní nedostatek, omezující i rozšíření použití aktivních uhlí je odstraněn vynálezem který spočívá v předchozím vysrážení olova cementací zinkovým prachem z roztoků chloridu zinečnatého. Po cementaci se roztok zfiltruje. Takto zbaven těžkých kovů, hlavně olova, je použit k vlastni aktivaci dřevěných pilin na aktivní uhlí.Said qualitative deficiency, limiting and extending the use of activated carbon, is eliminated by the invention which consists in the prior precipitation of lead by zinc cementation from zinc chloride solutions. After cementation, the solution is filtered. Thus deprived of heavy metals, mainly lead, is used to actually activate wood sawdust for activated carbon.
PříkladExample
Do předloženého množství (7 m3) koncentrované 30 až 33% kyseliny chlorovodíkové se za míchání postupně vnáší zinkový odpad. Po dosaženi měrné hmotnosti cca 1 500 kg.m3 a usměrněni kyselosti se z povrchu odstraní vzniklá vrstva mechanických nečistot. Poté se do kádě přidá potřebné množství zinkového prachu. Množství je stanoveno stechiometrickým poměrem na základě analýz roztoků chloridu zinečnatého podle kvality zpracovávaného zinkového odpadu.Zinc waste is gradually introduced into the present amount (7 m 3 ) of concentrated 30-33% hydrochloric acid with stirring. After reaching a specific gravity of approx. 1,500 kg.m 3 and acidification, the resulting layer of mechanical impurities is removed from the surface. The required amount of zinc dust is then added to the vat. The amount is determined by a stoichiometric ratio based on analyzes of zinc chloride solutions according to the quality of the zinc waste being treated.
Po 2 hodinovém míchání a 4 hodinovém usazování je roztok zbaven cementačních kalů filtraci. Následně je pak prováděna aktivace dřevěných pilin.After stirring for 2 hours and settling for 4 hours, the solution is freed from the cement sludge by filtration. The wood sawdust is then activated.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS877143A CS261347B1 (en) | 1987-10-05 | 1987-10-05 | Method of active coal production with reduced lead content |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS877143A CS261347B1 (en) | 1987-10-05 | 1987-10-05 | Method of active coal production with reduced lead content |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CS714387A1 CS714387A1 (en) | 1988-06-15 |
| CS261347B1 true CS261347B1 (en) | 1989-01-12 |
Family
ID=5420006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CS877143A CS261347B1 (en) | 1987-10-05 | 1987-10-05 | Method of active coal production with reduced lead content |
Country Status (1)
| Country | Link |
|---|---|
| CS (1) | CS261347B1 (en) |
-
1987
- 1987-10-05 CS CS877143A patent/CS261347B1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CS714387A1 (en) | 1988-06-15 |
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