DE2839465A1 - High temp. wet scrubbing process for gas purificn. - using alkali hydroxide melt contg. calcium and magnesium to reduce formation of insol. calcium cpds. - Google Patents

High temp. wet scrubbing process for gas purificn. - using alkali hydroxide melt contg. calcium and magnesium to reduce formation of insol. calcium cpds.

Info

Publication number
DE2839465A1
DE2839465A1 DE19782839465 DE2839465A DE2839465A1 DE 2839465 A1 DE2839465 A1 DE 2839465A1 DE 19782839465 DE19782839465 DE 19782839465 DE 2839465 A DE2839465 A DE 2839465A DE 2839465 A1 DE2839465 A1 DE 2839465A1
Authority
DE
Germany
Prior art keywords
calcium
cpds
magnesium
alkali hydroxide
insol
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
DE19782839465
Other languages
German (de)
Other versions
DE2839465C2 (en
Inventor
Ekkehard Prof Dr Ing Weber
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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
Application filed by Individual filed Critical Individual
Priority to DE19782839465 priority Critical patent/DE2839465A1/en
Publication of DE2839465A1 publication Critical patent/DE2839465A1/en
Application granted granted Critical
Publication of DE2839465C2 publication Critical patent/DE2839465C2/de
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
    • B01D47/06—Spray cleaning

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Treating Waste Gases (AREA)

Abstract

In wet scrubbing of impurities from gases, which are to be purified at high temps., pref. above 600 K, using a melt of alkali cpds., (I) contg. dispersed alkline earth cpds. (II), as in DT 2815446, (I) is an alkali hydroxide (NaOH) and (II) a mixt. of Ca and Mg (hydro)oxides or carbonates, pref. of CaO and MgO, esp. with a CaO content of 0-100%. The addn. of MgO reduces the danger of formation of Ca cpds. which are hardly soluble in the (I) melt.

Description

Verfahren zum Naßabscheiden von Verunreinigungen Process for the wet separation of impurities

aus Gasen höherer Temperatur Die Erfindung betrifft ein Verfahren zur Naßabscheidung von Verunreini gungen aus Gasen, die bei hohen, vorzugsweise oberhalb 600 K liegenden Temperaturen zu reinigen sind, wobei nach der deutschen Patentanmeldung P 28 15 446 eine Schmelze aus Alkaliverbindungen benutzt wird, in der feste Erdalkal Iverbindungen dispergiert sind. from gases of higher temperature The invention relates to a method for wet separation of impurities from gases that are at high, preferably Temperatures above 600 K are to be cleaned, according to the German Patent application P 28 15 446 a melt of alkali compounds is used in the solid alkaline earth compounds are dispersed.

Die Reinigungsverfahren von Gasen höherer Temperaturen mittels Schmelzen werden In ihrer Wirtschaftlichkeit wesentlich durch die bei der Aufarbeizung der Schmelze anfallenden KostenbeeinfIußt. Darüber hinaus bedürfen die Gasreinigungsanlagen nach diesen Verfahren besonderer Oberwachung auf Ablagerungen durch wNlösilche oder schwerlösliche Reaktionsprodukte, die zur Kristallisation und damit zum Ansetzen neigen. Dadurch kann die Anwendbarkeit der vorgeschlagenen Alkalihydroxidschnelzen, in -denen Calciumoxid dispergiert ist, eingeschränkt werden. Aufgabe der Erfindung Ist es, diesen Nachteil zu überwinden.The cleaning process of gases at higher temperatures by means of melting In their economic efficiency, they are essentially due to the processing of the Affects the costs incurred by the melt. In addition, the gas cleaning systems are required according to these procedures, special monitoring for deposits caused by water dissolving or poorly soluble reaction products that lead to crystallization and thus to the build-up tend. As a result, the applicability of the proposed alkali hydroxide melts, in which calcium oxide is dispersed. Object of the invention Is to overcome this disadvantage.

Gemäß der Erfindung wird vorgeschlagen, aß als Alkaliverbindung ein Alkalihydroxid, vorzugsweise Natriumhydroxid, eingesetzt ist, in dem als feste Erdalkaliverbindungen ein Gemisch aus Oxiden, Hxdroxiden oder Carbonaten der Erdalkalimetalle Calcium und Magnesium dispergiert ist. In weiterer Ausgestaltung wird vorgeschlagen, daß die in der Schmelze dispergierten Erdalkaliverbindungen eine Mischung als Calciumoxid und Magnesiumoxid sind. In bevorzugter AusfUhruncf>liegt der Calciumoxidgehalt der Calciumoxid-Magnesiumoxid-Mischung zwischen 0% und 100%.According to the invention it is proposed that ate as an alkali compound Alkali hydroxide, preferably sodium hydroxide, is used in the form of solid alkaline earth compounds a mixture of oxides, hydroxides or carbonates of the alkaline earth metals calcium and magnesium is dispersed. In a further embodiment it is proposed that the alkaline earth compounds dispersed in the melt form a mixture as calcium oxide and magnesium oxide. In a preferred embodiment, the calcium oxide content is of the calcium oxide-magnesium oxide mixture between 0% and 100%.

Das erfindungsgemäße Verfahren verringert durch den Einsatz von Magneslumoxid die Gefahr des Anfallens von In Alkal@hydroxidschmelzen schwerlöslichen CalcTumverbindungen, wobei als Reaktionsprodukte für das eingesetzte Calcium beispielsweise auch SilizIum oder Elsen aus der Flugasche mit In Betracht gezogen werden müssen.The process according to the invention is reduced by the use of magnesium oxide the risk of the formation of calcium compounds that are poorly soluble in alkali hydroxide melts, where, for example, silicon is also used as reaction products for the calcium used or Elsen from the fly ash with must be taken into account.

Claims (3)

Patentansprüche 1. Verfahren zur iiaßabscheidung von Verunreinigungen von Gasen, die bei hohen, vorzugsweise:oberhalb 600 K 1 liegenden Temperaturen zu reinigen sind, wobei nach der deutschen Patentanmeldung P 28 15 446 eine Schmelze aus Alkaliverbindungen benutzt wird, in der Erdalkaliverbindungen disperglert sind, dadurch gekennzeichnet, daß als Alkaliverbindung ein Alkalihydroxid, vorzugsweise Natriumhydroxid, eingesetzt Ist, in dem als Erdalkaliverbindungen ein Gemisch aus Oxiden, Hydroxiden oder Karbonaten der Erdalkalimetalle.Calcium und Magneslun dispergiert ist. Claims 1. Process for the separation of impurities of gases that are at high, preferably: above 600 K 1 temperatures are clean, according to the German patent application P 28 15 446 a melt is used from alkali compounds in which alkaline earth compounds are dispersed, characterized in that the alkali compound is an alkali hydroxide, preferably Sodium hydroxide is used in which, as alkaline earth compounds, is a mixture of Oxides, hydroxides or carbonates of the alkaline earth metals. Calcium and Magneslun dispersed is. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die in der Schmelze dispergierten Erdalkaliverbindungen eine Mischung aus Calclumoxid und Magneslumoxid sind.2. The method according to claim 1, characterized in that the in the Melt dispersed alkaline earth compounds a mixture of calcium oxide and magnesium oxide are. 3. Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß der Calclumoxidgehalt des Calciumoxid-Magnesiumoxid-Gemisches zwischen 0% und 100t liegt.3. The method according to claim 2, characterized in that the calcium oxide content of the calcium oxide-magnesium oxide mixture is between 0% and 100t.
DE19782839465 1978-09-11 1978-09-11 High temp. wet scrubbing process for gas purificn. - using alkali hydroxide melt contg. calcium and magnesium to reduce formation of insol. calcium cpds. Granted DE2839465A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19782839465 DE2839465A1 (en) 1978-09-11 1978-09-11 High temp. wet scrubbing process for gas purificn. - using alkali hydroxide melt contg. calcium and magnesium to reduce formation of insol. calcium cpds.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19782839465 DE2839465A1 (en) 1978-09-11 1978-09-11 High temp. wet scrubbing process for gas purificn. - using alkali hydroxide melt contg. calcium and magnesium to reduce formation of insol. calcium cpds.

Publications (2)

Publication Number Publication Date
DE2839465A1 true DE2839465A1 (en) 1980-05-08
DE2839465C2 DE2839465C2 (en) 1989-09-14

Family

ID=6049148

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19782839465 Granted DE2839465A1 (en) 1978-09-11 1978-09-11 High temp. wet scrubbing process for gas purificn. - using alkali hydroxide melt contg. calcium and magnesium to reduce formation of insol. calcium cpds.

Country Status (1)

Country Link
DE (1) DE2839465A1 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1263702B (en) * 1962-10-10 1968-03-21 Ruhrchemie Ag Process for removing sulfur compounds from gases
US3919390A (en) * 1974-07-12 1975-11-11 Us Interior Process and composition for cleaning hot fuel gas

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1263702B (en) * 1962-10-10 1968-03-21 Ruhrchemie Ag Process for removing sulfur compounds from gases
US3919390A (en) * 1974-07-12 1975-11-11 Us Interior Process and composition for cleaning hot fuel gas

Also Published As

Publication number Publication date
DE2839465C2 (en) 1989-09-14

Similar Documents

Publication Publication Date Title
DE3332447A1 (en) METHOD FOR FREEING SILICON BREADS FROM IMPURITIES
DE1112055B (en) Process for cleaning aluminum oxide
DE2839465A1 (en) High temp. wet scrubbing process for gas purificn. - using alkali hydroxide melt contg. calcium and magnesium to reduce formation of insol. calcium cpds.
DE1274567B (en) Process for extracting the lithium content from silicate minerals
DE2815446A1 (en) METHOD FOR WET SEPARATING IMPURITIES FROM GASES OF HIGHER TEMPERATURE
KR960014929B1 (en) Coal ash modification and reduction
DE2151161A1 (en) Process for the regeneration of activated carbon layers saturated with adsorbed elemental chlorine
US2170394A (en) Treating metal mixtures
DE3714673C1 (en) Process for cleaning steam generator heating surfaces
US2459764A (en) Purification of native sulfur
DE510750C (en) Processing of materials containing arsenic, especially those containing arsenic and cadmium
AT106692B (en) Process for the production of alumina from alumina-containing materials of all kinds.
DE2139678B2 (en) Process for cleaning exhaust gases from waste incineration plants
DE4027159A1 (en) Alumina recovery esp. from hydrogen peroxide mfr. by autoxidation - by heating in aq. liq., sepg. solid impurities, filtering, drying and calcining
DE938965C (en) Process for the processing of the sodium hydroxide and potassium hydroxide solutions that arise in the manufacture of water glass
DE4237995C2 (en) Process for the separation of harmful gases
DE536888C (en) Process for cleaning concentrated sodium hydroxide solution from sodium chloride
SU1194841A1 (en) Method of processing anorthite raw material
DE934424C (en) Process for cleaning hard-to-melt crystalline substances
DE380147C (en) Process for the decomposition of metal soaps and for the recovery of the metals split off as metal salts in a form suitable for saponification
SU377372A1 (en) METHOD OF CLEANING METAL SODIUM
DE715759C (en) Process for removing the catalyst for the synthesis of gasoline from the contact furnace
US522998A (en) Ebenezer kennard mitting
DE322956C (en) Melting of glasses made of silica or other highly refractory and vitrifiable oxides, individually or in a mixture, in a vacuum
JPS5461017A (en) Treating method for magnensium silicate type waste catalyst

Legal Events

Date Code Title Description
8110 Request for examination paragraph 44
D2 Grant after examination
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee