SE423226B - PROCEDURE FOR THE PREPARATION OF LOW WATER CONTENT ALKALISYCATS - Google Patents

PROCEDURE FOR THE PREPARATION OF LOW WATER CONTENT ALKALISYCATS

Info

Publication number
SE423226B
SE423226B SE7803282A SE7803282A SE423226B SE 423226 B SE423226 B SE 423226B SE 7803282 A SE7803282 A SE 7803282A SE 7803282 A SE7803282 A SE 7803282A SE 423226 B SE423226 B SE 423226B
Authority
SE
Sweden
Prior art keywords
spray
alkali metal
added
dried
weight
Prior art date
Application number
SE7803282A
Other languages
Swedish (sv)
Other versions
SE7803282L (en
Inventor
R P Neser
H R Burka
Original Assignee
Woellner Werke
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 Woellner Werke filed Critical Woellner Werke
Publication of SE7803282L publication Critical patent/SE7803282L/en
Publication of SE423226B publication Critical patent/SE423226B/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B33/00—Silicon; Compounds thereof
    • C01B33/20—Silicates
    • C01B33/32—Alkali metal silicates
    • C01B33/325—After-treatment, e.g. purification or stabilisation of solutions, granulation; Dissolution; Obtaining solid silicate, e.g. from a solution by spray-drying, flashing off water or adding a coagulant

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Silicates, Zeolites, And Molecular Sieves (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Description

, tungat. 7803282-8 2 Eftertorkningen av en sprayprodukt betyder avsevärd arbetskost- nad och tidsförlust, varigenom ett dylikt förfarande blir ekonomiskt be- füppfinningen har till uppgift att tillhandahålla ett enkelt-genom- förbart ekonomiskt.spraytorkningsförfarande för att framställa alkalisili- kat, särskilt natrium- och kaliumsilikat. ' ' I K Denna uppgift löses enligt.uppfinningen genom ett förfarande för att framställa alkalisilikat med låg vattenhalt genom spraytorkning av en rvattenhaltig alkáiälikatlösning på så vis att alkalisilikatlöeningen som skall spraytorkas försättes med ett aluminiumsalt av en ogrenad alifatisk monokarbonsyra med 14 till 26 kolatomer. , I Normalt genomföras ett dylikt förfarande med en fastämneshalt på slammet av 58 till 50, särskilt 40 till 49 viktprocent. Temperaturen på slammet uppgår i allmänhet till 80 - 100°C och arbetstrycket till 90 -120 bar. Torkluftens ingångstemperatur ligger mellan 580 och 400°C och dess utgångstemperatur vid 150 till 150°C. Skulle ett förfarande genomföras på hittills känt sätt under dessa förhållanden skulle vattenhalterna upp- gå till 16 - 20 % medan vid genomförandet av föreliggande förfarande en- ligt uppfinningen vattenhalter av mindre än 10 % erhålles. , tungat. The after-drying of a spray product means considerable labor cost and time loss, whereby such a process becomes economical. The object of the invention is to provide a simple-feasible economical spray-drying process for producing alkali silicate, in particular sodium and potassium silicate. This object is solved according to the invention by a process for preparing low water alkali silicate by spray drying an aqueous alkali metal solution solution so that the alkali silicate solution to be spray dried is added with an aluminum salt of an unbranched aliphatic monocarboxylic acid atom of 14 to 26. Normally, such a process is carried out with a solids content of the sludge of 58 to 50, in particular 40 to 49% by weight. The temperature of the sludge generally amounts to 80 - 100 ° C and the working pressure to 90 -120 bar. The inlet air inlet temperature is between 580 and 400 ° C and its outlet temperature is 150 to 150 ° C. Should a process be carried out in a manner known hitherto under these conditions, the water contents would amount to 16 - 20%, while in carrying out the present process according to the invention water contents of less than 10% are obtained.

Företrädesvis uppgår enligt uppfinningen kvantiteten tillsatt alu» miniumsalter till 0,01 - 4,00 viktprocent, särskilt 0,05 - 2,00 viktprocent.Preferably, according to the invention, the quantity of added aluminum salts amounts to 0.01 to 4.00% by weight, in particular 0.05 to 2.00% by weight.

. Som aluminiumsalt användes företrädesvis aluminiumpalmitat ooh/ eller aluminiumstearat.. As the aluminum salt, aluminum palmitate and / or aluminum stearate are preferably used.

Till lösningen som skall spraytorkas kan därjämte sättas alkali- sulfat, alkalifosfat, alkalikarbonat och alkaliborat, exempelvis natrium- pentaborat, eller blandningar därav för modifieringsändamâl. Dessa till- satser till lösningen som skall spraytorkas bidrar till att ytterligare neasätta vattenhelten. 1 _ Företrädesvis inblandas tillsatserna i kvantiteter av 1 till 50 'viktprooent, särskilt 10 till 50 viktprocent, av lösningen som skall spraytorkas. , K Genom följande exempel förtydligas uppfinningen.To the solution to be spray-dried may also be added alkali metal sulphate, alkali metal phosphate, alkali metal carbonate and alkali metal borate, for example sodium pentaborate, or mixtures thereof for modification purposes. These additives to the solution to be spray-dried help to further reduce the water content. Preferably, the additives are mixed in quantities of 1 to 50% by weight, in particular 10 to 50% by weight, of the solution to be spray-dried. The invention is clarified by the following examples.

Exempel Under följande betingelser spraytorkades ett slam av natriumdi- silikat med en fastämneshalt av 46,5 % och en halt av 1,5 % Al-stearat.Example Under the following conditions, a slurry of sodium disilicate with a solids content of 46.5% and a content of 1.5% Al stearate was spray dried.

Slamtemperatur _ . : Z 80 - 10000 Åïbeffitrïßk : 90 - 120 bar Ingångstemperatur hos torkluften; 530 _ 400°g Utgångstèmperatur hos torkiuften, 150 15o°c Den spraytorkade produkten hade en vattenhalt av 9,5 %.Sludge temperature _. : Z 80 - 10000 Åïbef fi trïßk: 90 - 120 bar Inlet temperature of the drying air; 530 - 400 ° g Starting temperature of the drying air, 150 ° C The spray-dried product had a water content of 9.5%.

Claims (3)

7803282-8 PATENTKIÉAV7803282-8 PATENTKIÉAV 1. l. Förfarande för framställning av alkalisilikater med låg vattenhalt genom spraytorkning av en vattenhaltig alkalisilikatlösning, k å n n e t e c k n a t av att till den alkalisilikatlösning, som skall spray-torkas, sättes ett aluminiumsalt i form av aluminiumstearat och/eller aluminíumpalmitat.1. A process for the preparation of low water alkali silicates by spray drying an aqueous alkali silicate solution, characterized in that an aluminum salt in the form of aluminum stearate and / or aluminum palmitate is added to the alkali silicate solution to be spray-dried. 2. Förfarande enligt krav l, k ä n n e t e c k n a t av att mängden till- satt aluminiumsalt uppgår till 0,01 - 1+,00.vikt-%, särskilt 0,05 - 2,00 vikt-ßProcess according to Claim 1, characterized in that the amount of added aluminum salt amounts to 0.01 - 1 +, 00.% by weight, in particular 0.05 - 2.00% by weight. 3.- Förfarande enligt krav l eller 2, k ä n n e t e c k n a t av att till lösningen, som slzall spr-aytorkas, sättes ytterligare tillsatser i form av alkali- sulfat, alkalifosfat, alkalikarbonat eller blandningar därav. h. Förfarande enligt något av krav 1-2, k ä. n n e t e c k n a t av att till lösningen, som skall spraytorkas, sättas alkaliborat, exempelvis natriumpenta- borat. _ i S. Förfarande enligt krav 3-14, k ä n n e t e c k n a. t av att nämnda ytterligare tillsatser inblandas i en mängd GW 1 -50 Víkf-ï, SärSRílt 10 - 30 vikt-ß- ANFURDA PUBLIKATIONER:Process according to Claim 1 or 2, characterized in that additional additives in the form of alkali metal sulphate, alkali metal phosphate, alkali metal carbonate or mixtures thereof are added to the solution, which is spray-dried. h. Process according to one of Claims 1 to 2, characterized in that alkali metal borate, for example sodium pentaborate, is added to the solution to be spray-dried. Process according to claims 3-14, characterized in that said additional additives are mixed in an amount of GW 1 -50 Víkf-ï, SärSRílt 10 - 30 weight-ß- REQUIRED PUBLICATIONS:
SE7803282A 1977-06-28 1978-03-22 PROCEDURE FOR THE PREPARATION OF LOW WATER CONTENT ALKALISYCATS SE423226B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2729193A DE2729193C2 (en) 1977-06-28 1977-06-28 Process for the production of alkali silicates with a low water content

Publications (2)

Publication Number Publication Date
SE7803282L SE7803282L (en) 1978-12-29
SE423226B true SE423226B (en) 1982-04-26

Family

ID=6012594

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7803282A SE423226B (en) 1977-06-28 1978-03-22 PROCEDURE FOR THE PREPARATION OF LOW WATER CONTENT ALKALISYCATS

Country Status (4)

Country Link
DE (1) DE2729193C2 (en)
FR (1) FR2395953A1 (en)
NL (1) NL7806753A (en)
SE (1) SE423226B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4400543C2 (en) * 1994-01-11 1996-09-05 Hoechst Ag Process for the isolation of tetraphenylborates

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1517891A (en) * 1922-09-01 1924-12-02 Ind Waste Products Corp Powdered sodium silicate and process of preparing the same
DE2021004C3 (en) * 1970-04-29 1978-10-26 Henkel Kgaa, 4000 Duesseldorf Process for the production of solid, hydrous alkali silicates
US3918921A (en) * 1971-05-14 1975-11-11 Philadelphia Quartz Co Process for making granular hydrated alkali metal silicate
US4022704A (en) * 1971-06-21 1977-05-10 Stauffer Chemical Company Production of spray dried, high bulk density hydrous sodium silicate mixtures
US3794503A (en) * 1972-05-12 1974-02-26 Philadelphia Quartz Co Hollow spheres consisting of alkali metal silicate and a polysalt

Also Published As

Publication number Publication date
FR2395953B1 (en) 1983-01-07
NL7806753A (en) 1979-01-02
DE2729193C2 (en) 1984-11-29
DE2729193A1 (en) 1979-01-04
SE7803282L (en) 1978-12-29
FR2395953A1 (en) 1979-01-26

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