DE1667548A1 - Process for the production of synthetic gmelinite - Google Patents

Process for the production of synthetic gmelinite

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Publication number
DE1667548A1
DE1667548A1 DE19671667548 DE1667548A DE1667548A1 DE 1667548 A1 DE1667548 A1 DE 1667548A1 DE 19671667548 DE19671667548 DE 19671667548 DE 1667548 A DE1667548 A DE 1667548A DE 1667548 A1 DE1667548 A1 DE 1667548A1
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DE
Germany
Prior art keywords
gmelinite
production
synthetic
gel
aluminum silicate
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.)
Pending
Application number
DE19671667548
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German (de)
Inventor
Klaus Dipl-Chem Wacks
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.)
Herrmann Gebrueder
Original Assignee
Herrmann Gebrueder
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 Herrmann Gebrueder filed Critical Herrmann Gebrueder
Priority to DE19671667548 priority Critical patent/DE1667548A1/en
Publication of DE1667548A1 publication Critical patent/DE1667548A1/en
Pending legal-status Critical Current

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Classifications

    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B33/00Silicon; Compounds thereof
    • C01B33/20Silicates
    • C01B33/26Aluminium-containing silicates, i.e. silico-aluminates
    • C01B33/28Base exchange silicates, e.g. zeolites
    • C01B33/2807Zeolitic silicoaluminates with a tridimensional crystalline structure possessing molecular sieve properties; Isomorphous compounds wherein a part of the aluminium ore of the silicon present may be replaced by other elements such as gallium, germanium, phosphorus; Preparation of zeolitic molecular sieves from molecular sieves of another type or from preformed reacting mixtures
    • C01B33/2869Zeolitic silicoaluminates with a tridimensional crystalline structure possessing molecular sieve properties; Isomorphous compounds wherein a part of the aluminium ore of the silicon present may be replaced by other elements such as gallium, germanium, phosphorus; Preparation of zeolitic molecular sieves from molecular sieves of another type or from preformed reacting mixtures of other types characterised by an X-ray spectrum and a definite composition

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Silicates, Zeolites, And Molecular Sieves (AREA)

Description

Verfahren zur Herstellung von synthetischem Gmelinit. Die Erfindung betrifft ein Verfahren zur Herstellung von syn -thetischem Gmelinit. Es ist bekannt,daß Zeolithe nach Austreibung ihres Kristallwas -sers als sogenannte Molekularsiebe wirken.Sie können außer Wasser auch andere Moleküle aufgrund deren molarer Dimensionen,ihrer Polarität,ihres Siedepunktes und der Anzahl der Doppelbindungen@selektiv aufnehmen.Wegen der Bedeutung dieser Eigenschaften für die Technik wurden die verschiedensten Typen,die teilweise auch nicht in der Natur vorkommen,synthetisiert. Von den natürlichen Zeolithen wurden. bisher der Chabasit,der Faujasit und der Mordenit,teilweise mit Abwandlungen im SiO2 - Ge -halt bzw. in den Kationen des Naturproduktes,synthetisch hergestellt.Process for the production of synthetic gmelinite. The invention relates to a process for the production of synthetic gmelinit. It is known that Zeolites after expelling their crystalline water as so-called molecular sieves Besides water, they can also have other molecules due to their molar dimensions, their Selectively record the polarity, its boiling point and the number of double bonds @ the importance of these properties for technology were the most diverse types that partly also not occurring in nature, synthesized. Of the natural zeolites became. so far the Chabazite, the Faujasite and the Mordenite, partly with modifications in the SiO2 content or in the cations of the natural product, synthetically produced.

Der Gmelinit war bislang nur als Verunreinigung bei der Herstellung von Zeolithen des Faujasit - Typs,nicht aber in reiner Form bekannt. Linen reinen Gmelinit erhält jedoch,wenn nach der im Folgenden beschriebenen Erfindung gearbeitet wird.So far, gmelinite has only been used as an impurity in the production process of zeolites of the faujasite type, but not known in their pure form. Linen pure Gmelinit, however, obtained when worked according to the invention described below will.

Diese beruht darauf,daß ein gelartiges Natriumaluminiumsilikat mit einem Nassergehalt von mehr als 60,bevorzugt mehr als 85 Gew.» mit einem Natriumsilikat von einem Malverhältnis von Si02 : Na 20 zwischen 1,9 und 4,1 ,bevorzugt 3.,1 bis 3,5 verrührt,wobei das Ver -hältnis »Si02 : AL 203 zwischen 2,8 und 3,5 ,bevorzugt zwischen 3,00 und 3,05 im Natriumaluminiumsilikat - Gel liegt,diese Mischung auf Temperaturen über 7000 erwärmt und sie mindestens 30 Minuten auf dieser Temperatur hält,bis die Kristallisation beendet ist. Idas Kristallpulver wird anschließend in bekannter Weise auf einen pH - Wert von bevorzugt 87,0 bis 9,5 ausgewaschen und bei Bedarf das Natrium - Ion durch. ein anders,zum Austausch befähigtes Ion ganz oder teilweise ersetzt. Das erfindungsgemäß hergestellte Produkt hab üblicherweise die Zu- sammensetzung Na 20 . ASr203 # 5 Si02 - 5e4' H20 und ist durch die fol- genden Hönbgendaten charakterisiert. c h2 + k2 + l2 d A rel.In tens . 1 + 0 + a 11,@ 80 0, + 0 + l@ 9.,5 sehr diffus 1 + 1 + 0 6,85 100 0 + 0 + 46 5,01 100 40 4 + 1 + 0 4946 + 0 + 0 3.3962 40 4 + 4 + 0 3,431 100 9 + 1 + 0 5,280 5 1 + 0 + 9,9 + 0 + 4 3,167 10 1 6 + 0 + 0 21.970 60 4 + 0 + 9 2,3900 4E3 4 + 4 + 4 2,829 40 16 + 1 + 0 2,595 100 4 + 0 + 16 21,284 20 9 + 4 + 9,9 + 0 + 16 2,115 20 + 9 + 4 2,.085 100 1 + 1 + 25116+ 0 + 16 1 , 901 60 16 + 1 + 16 12800 100 16 + 16 + 0 11716 100 49 + 0 + 0 11687 cS 60 h2 + k2 + 12 d X re 1. Int ens . 0 + 0 + 36 19667 60 1 + 0 + 36,36 + 4 + 0 1,646 20 1 + 1 + 36 1,636 20 hexasonal a. = 13,'72 R Co = 10,00Ä Das natürliche Produkt,(Na2Ca2 AZ2Si4012 6H20, ist nach Ramdohr rhomboedrisch,da (10 '(1) und(01 '11) durch gleichmäßige Entwicklung scheinbar eine hexagonale Bipyramide bilden. Gmelinit ist für den technischen Einsatz wichtig,da bei zeo -lithischen Molekularsieben bekanntlich mit zunehmendem Si02 -Änteil die thermische Beständigkeit und die Säurefestigkeit steigen. Beispiele: Für die Beispiele wurde ein Natriumaluminiumsilikat - Gel be -nutzt,welches 89,5 jö Wasser (110°C) enthie'..a- und im trockenen Zustand folgende Zusammensetzung hatte: Si02 - 41,46 %, AL 203 = 23,30 %, Na20 = 13,50 %, Modul AZ203 / Si02 = 1/ 3,03 - 1. 1650 g Gel wurden mit 600 ml Natronwasserglas der Dichte 1,36 und einem Verhältnis Si02 : Na20 = 3,3 innig vermischt,der entstandene Brei wurde 312 Stunden bei 100°C gehalten.This is based on the fact that a gel-like sodium aluminum silicate with a water content of more than 60, preferably more than 85 wt. with a sodium silicate with a ratio of SiO2: Na 20 between 1.9 and 4.1, preferably 3., 1 to 3.5, the ratio SiO2: AL 203 between 2.8 and 3.5, is preferably between 3.00 and 3.05 in the sodium aluminum silicate gel, this mixture is heated to temperatures above 7000 and it is kept at this temperature for at least 30 minutes until the crystallization is complete. Idas crystal powder is then in a known manner on a pH - value of preferably 87.0 to 9.5 washed out and if necessary that Sodium ion through. a different ion capable of exchange entirely or partially replaced. The product manufactured according to the invention usually has the composition Na 20. ASr203 # 5 Si02 - 5e4 'H20 and is by the fol- The honeymoon data is characterized. c h2 + k2 + l2 d A rel.In tens. 1 + 0 + a 11, @ 80 0, + 0 + 1 @ 9, 5 very diffuse 1 + 1 + 0 6.85 100 0 + 0 + 46 5.01 100 40 4 + 1 + 0 4946 + 0 + 0 3.3962 40 4 + 4 + 0 3.431 10 0 9 + 1 + 0 5.280 5 1 + 0 + 9.9 + 0 + 4 3.167 1 0 1 6 + 0 + 0 21,970 6 0 4 + 0 + 9 2.3900 4E3 4 + 4 + 4 2.829 40 16 + 1 + 0 2.595 100 4 + 0 + 16 21.284 20 9 + 4 + 9.9 + 0 + 16 2.115 20 + 9 + 4 2 ,. 0 85 10 0 1 + 1 + 25 116+ 0 + 16 1, 9 0 1 60 16 + 1 + 16 12800 100 16 + 1 6 + 0 11716 100 49 + 0 + 0 11687 cS 60 h2 + k2 + 12 d X re 1st Int ens. 0 + 0 + 36 19667 60 1 + 0 + 36.36 + 4 + 0 1.646 20 1 + 1 + 36 1.636 20 hexasonal a. = 13, '72 rows Co = 10.00E The natural product, (Na2Ca2 AZ2Si4012 6H20, is rhombohedral according to Ramdohr, since (10 '(1) and (01 '11) apparently form a hexagonal bipyramid through uniform development. Gmelinite is important for technical use because it is used in zeo-lithic molecular sieves As is known, the thermal stability and the acid resistance increase with increasing SiO2 content.Examples : For the examples, a sodium aluminum silicate gel was used which contained 89.5% water (110 ° C) and the following in the dry state Composition had: Si02 - 41.46%, AL 203 = 23.30%, Na20 = 13.50%, Module AZ203 / Si02 = 1 / 3.03 - 1. 1650 g of gel were intimately mixed with 600 ml of sodium silicate with a density of 1.36 and a SiO 2: Na 2 O ratio of 3.3; the resulting paste was kept at 100 ° C. for 312 hours.

Die fertigen Kristalle wurden wie üblich weiterbehandelt. 2. 1635 g Gel wurden mit 572 ml des Wasserglases aus Beispiel 1 zu einem gleichmäßigen Brei verrührt und anschließend 7 Stunden. bei 180°C gehalten.Die Weiterbehandlung erfoete wie üblich.The finished crystals were treated as usual. 2. 1635 g of gel were mixed with 572 ml of the water glass from Example 1 to form a uniform paste and then for 7 hours. kept at 180 ° C. Further treatment was carried out as usual.

Das aktivierte Produkt ergab folgende Wasserdampf - Isotherme: ;ä rel.Feuchte Gew.o H20 Aufnahme T = 22C 10 9,0 20 9,0 40 9,0 60 9,o 80 9,0 100 11,4 The activated product gave the following water vapor isotherms: ; ä relative humidity weight o H20 absorption T = 22C 10 9.0 20 9.0 40 9.0 60 9, o 80 9.0 100 11.4

Claims (2)

P a t e n t ans p r ü c h e 1. Verfahren zur Herstellung von synthetischem Gmelinit,gekenn -zeichnet dadurch,daß ein gelartiges Natriumaluminiumsilikat mit einem Wassergehalt von mehr als 60,bevorzugt mehr als 85 Gew.% mit einem Natriumsilikat von einem Molverhältnis von Sio2 : Na 20 zwischen 1,9 und 4,1 ,bevorzugt 3,1 bis 3,5 verrührt,wobei das Verhältnis SiO2 : AL 203 zwischen 2,8 und 3,5, bevorzugt zwischen 3,00 und j,05 im Natriumaluminiumsilikat -Gel liegt,diese !Jiscilung auf Temperaturen über 700C erwärmt und sie mindestens 30 Minuten auf dieser Temperatur hält,bis die Kristallisation beendet ist und das Fertigprodukt die Röntgendaten der Tabelle 1 aufweist,wobei geringfügige Verschiebungen möglich sind. Patent to pr ü che 1. Process for the production of synthetic gmelinite, characterized in that a gel-like sodium aluminum silicate with a water content of more than 60, preferably more than 85 wt between 1.9 and 4.1, preferably 3.1 to 3.5 stirred, the ratio SiO2: AL 203 being between 2.8 and 3.5, preferably between 3.00 and 0.50 in the sodium aluminum silicate gel, this coating is heated to temperatures above 700 ° C. and held at this temperature for at least 30 minutes until the crystallization has ended and the finished product has the X-ray data in Table 1, slight shifts being possible. 2. Verfahren nach Anspruch 1,dadurch gekennzeichnet,daß das Kristallpulver auf einen pH - Wert von bevorzugt 8,0 bis 9,5 ausgewaschen und im Bedarfsfall das Natrium - Ion durch ein an -deres zum Austausch befähigtes Ion ersetzt wird.2. Procedure according to claim 1, characterized in that the crystal powder is adjusted to a pH from preferably 8.0 to 9.5 washed out and, if necessary, the sodium ion through another ion capable of exchange is replaced.
DE19671667548 1967-10-13 1967-10-13 Process for the production of synthetic gmelinite Pending DE1667548A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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DE1667548A1 true DE1667548A1 (en) 1971-09-02

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0026687A2 (en) * 1979-09-04 1981-04-08 Joseph Davidovits Synthetic inorganic polymer of the silicoaluminate family and process for the preparation thereof; moulded articles containing this polymer, and process for their preparation

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0026687A2 (en) * 1979-09-04 1981-04-08 Joseph Davidovits Synthetic inorganic polymer of the silicoaluminate family and process for the preparation thereof; moulded articles containing this polymer, and process for their preparation
EP0026687A3 (en) * 1979-09-04 1982-01-13 Joseph Davidovits Synthetic inorganic polymer of the silicoaluminate family and process for the preparation thereof; moulded articles containing this polymer, and process for their preparation

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