ITTE20090012A1 - PROCEDURE FOR THE PRODUCTION OF SODIUM SILICATE INTENDED FOR THE SYNTHESIS OF NA-A ZEOLITE FROM DIATOMYTIC ROCKS. - Google Patents
PROCEDURE FOR THE PRODUCTION OF SODIUM SILICATE INTENDED FOR THE SYNTHESIS OF NA-A ZEOLITE FROM DIATOMYTIC ROCKS. Download PDFInfo
- Publication number
- ITTE20090012A1 ITTE20090012A1 IT000012A ITTE20090012A ITTE20090012A1 IT TE20090012 A1 ITTE20090012 A1 IT TE20090012A1 IT 000012 A IT000012 A IT 000012A IT TE20090012 A ITTE20090012 A IT TE20090012A IT TE20090012 A1 ITTE20090012 A1 IT TE20090012A1
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- IT
- Italy
- Prior art keywords
- production
- synthesis
- rocks
- sodium silicate
- zeolite
- Prior art date
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- 239000004115 Sodium Silicate Substances 0.000 title claims description 16
- 238000004519 manufacturing process Methods 0.000 title claims description 16
- 239000011435 rock Substances 0.000 title claims description 16
- 238000000034 method Methods 0.000 title claims description 13
- 230000015572 biosynthetic process Effects 0.000 title claims description 12
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 title claims description 12
- 229910052911 sodium silicate Inorganic materials 0.000 title claims description 12
- 238000003786 synthesis reaction Methods 0.000 title claims description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 25
- 239000010457 zeolite Substances 0.000 claims description 8
- 229910021536 Zeolite Inorganic materials 0.000 claims description 7
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 7
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 4
- 239000011707 mineral Substances 0.000 claims description 4
- 235000019351 sodium silicates Nutrition 0.000 claims description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 21
- 239000000203 mixture Substances 0.000 description 9
- 239000010453 quartz Substances 0.000 description 6
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 239000000377 silicon dioxide Substances 0.000 description 4
- 229910001868 water Inorganic materials 0.000 description 4
- 235000010755 mineral Nutrition 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 2
- 229920006362 Teflon® Polymers 0.000 description 2
- 150000004649 carbonic acid derivatives Chemical group 0.000 description 2
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000000888 organogenic effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 210000003462 vein Anatomy 0.000 description 2
- 241000206761 Bacillariophyta Species 0.000 description 1
- 229910021532 Calcite Inorganic materials 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 201000010001 Silicosis Diseases 0.000 description 1
- 239000003082 abrasive agent Substances 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000002734 clay mineral Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000005802 health problem Effects 0.000 description 1
- 239000011396 hydraulic cement Substances 0.000 description 1
- 238000011090 industrial biotechnology method and process Methods 0.000 description 1
- 238000012261 overproduction Methods 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 229910001388 sodium aluminate Inorganic materials 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 235000017550 sodium carbonate Nutrition 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
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
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B39/00—Compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites; Their preparation; After-treatment, e.g. ion-exchange or dealumination
- C01B39/02—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof; Direct preparation thereof; Preparation thereof starting from a reaction mixture containing a crystalline zeolite of another type, or from preformed reactants; After-treatment thereof
- C01B39/14—Type A
- C01B39/16—Type A from aqueous solutions of an alkali metal aluminate and an alkali metal silicate excluding any other source of alumina or silica but seeds
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Silicates, Zeolites, And Molecular Sieves (AREA)
Description
Descrizione di INVENZIONE Description of INVENTION
Descrizione dell'invenzione avente per titolo "Procedura per la produzione di silicato di sodio destinato alla sintesi della zeolite Na-A a partire da rocce diatomitiche", Description of the invention entitled "Procedure for the production of sodium silicate intended for the synthesis of zeolite Na-A starting from diatomitic rocks",
DESCRIZIONE DESCRIPTION
A) CAMPO DELLA TECNICA A CUI L’INVENZIONE FA RIFERIMENTO A) FIELD OF TECHNIQUE TO WHICH THE INVENTION REFERS
Il campo della tecnica è quello delle ceramiche e dei vetri solubili, della sintesi dei minerali neolitici ed altre applicazioni industriali. The field of technique is that of ceramics and soluble glasses, the synthesis of Neolithic minerals and other industrial applications.
Il fine dell invenzione è quello produrre silicati dì sodio semplificando gii attuali processi industriali, abbattendo la complessità, i rischi, l'usura delle attrezzature, le spese energetiche i costi complessivi ed aumentando la sicurezza degli impianti industriali. The aim of the invention is to produce sodium silicates by simplifying the current industrial processes, reducing complexity, risks, equipment wear, energy costs, overall costs and increasing the safety of industrial plants.
Le soluzioni di NA2SIO inoltre, potranno avere un titolo tale da essere utilizzabili direttamente per la sintesi di zeolite Na-A (attualmente applicata nell industria dei detersivi, e nei processi dì dolcificazione delle acque) ma anche di zeoliti Na-Y e Na-Z, Furthermore, NA2SIO solutions may have a title such that they can be used directly for the synthesis of Na-A zeolite (currently applied in the detergent industry, and in water sweetening processes) but also of Na-Y and Na-Z zeolites. ,
Il tutto verrà perseguito sostituendo alle quarziti (filoni e rocce) la silice amorfa delle diatomiti incoerenti. All this will be pursued by replacing the quartzites (veins and rocks) with the amorphous silica of incoherent diatomites.
B) STATO DELLA TECNICA PREESISTENTE. B) STATE OF THE PRE-EXISTING TECHNIQUE.
Attualmente le soluzioni dì silicato dì sodio vengono prodotte in sistemi autoclave ad elevate pressioni e temperature, utilizzando soluzioni di NaOH e come sorgente di silice rocce di quarzo (filoni di quarzo e quarziti), il cui reperimento, escavazione. pezzatura e macinatura pone problemi di impatto ambientale (gestione delle cave), di usura dei macchinari (durezza 7 del quarzo), problemi sanitari ( polveri e silicosi ), e di onerosi impianti industriali con pesanti aggravi della sommatoria dei diversi costi per l'approvvigionamento, e per ì pretrattamenti industriali. Sodium silicate solutions are currently produced in autoclave systems at high pressures and temperatures, using NaOH solutions and quartz rocks (strands of quartz and quartzites) as a source of silica, whose retrieval and excavation. size and grinding poses problems of environmental impact (management of quarries), of wear of machinery (hardness of quartz 7), health problems (dust and silicosis), and of expensive industrial plants with heavy aggravation of the sum of the various costs for procurement , and for industrial pretreatments.
Il secondo tipo di produzione è quello dei silicati di sodio anidri, i quali vengono prodotti ad elevatissime temperature (maggiori o uguali agli 800°C, con conseguenti problematiche di costi di produzione simili a quelle che si verificano per la produzione delle soluzioni di sodio silicato. L’attuale produzione dei silicati di sodio anidri, inoltre, si opera in condizioni di 1 atmosfera, in forni e non autoclavi, tramite l'impiego di Na2CO3. anziché di NaOH. con conscguente sovrapproduzione dì anidride carbonica. The second type of production is that of anhydrous sodium silicates, which are produced at very high temperatures (greater than or equal to 800 ° C, with consequent problems of production costs similar to those that occur for the production of sodium silicate solutions. Furthermore, the current production of anhydrous sodium silicates is carried out in conditions of 1 atmosphere, in ovens and not autoclaves, through the use of Na2CO3 instead of NaOH, with consequent overproduction of carbon dioxide.
C) ESPOSIZIONE DELL’INVENZIONE C) EXHIBITION OF THE INVENTION
Ci si prefìgge una estrema semplificazione del reperimento e del trattamento della silice attraverso la sostituzione alle rocce di quarzo cristallino (filoni di quarzo e quarziti) di rocce incoerenti di silice amorfa, quali ad esempio le diatomiti provenienti dalla provincia di Albacete (Spagna meridionale). The aim is to greatly simplify the finding and treatment of silica by replacing crystalline quartz rocks (veins of quartz and quartzites) with incoherent amorphous silica rocks, such as for example diatomites from the province of Albacete (southern Spain).
In generale, le diatomiti sono rocce di natura organogena, principalmente di composizione opalina, originatesi per l'accumulo di resti di scheletri di numerosi organismi (radiolari. diatomee, spugne) i quali fssano la silice dìsciolta nelle acque naturali. Tali rocce, ad elevata composizione silicea, rappresentano una importante risorsa economica, e ie loro proprietà fisiche e chimiche, i.e. elevata omogeneità granulometrica. elevata porosità, bassa cristallinità ne permettono l'impiego in numerosi campi di ricerca (produzione di cementi idraulici, abrasivi, esplosivi, cosmetici, etc. ). Questi depositi sono molto comuni nella provincia mediterranea e attualmente impiegate nelle industrie delle costruzioni, nelle industrie dei filtranti, degli adsorbenti e dei fertilizzanti. Le dialomiti appaiono all ' osservazione macroscopica come delle rocce porose e friabili, la cui composizione mineralogica, è costituita da silice amorfa opalina preponderante, e quarzo, minerali argillosi, e carbonati secondari. In general, diatomites are organogenic rocks, mainly of opaline composition, originating from the accumulation of the remains of skeletons of numerous organisms (radiolarians, diatoms, sponges) which fx the silica dissolved in natural waters. These rocks, with a high silica composition, represent an important economic resource, and their physical and chemical properties, i.e. high granulometric homogeneity. high porosity, low crystallinity allow its use in numerous research fields (production of hydraulic cements, abrasives, explosives, cosmetics, etc.). These deposits are very common in the Mediterranean province and are currently used in the construction, filter, adsorbent and fertilizer industries. The dialomites appear to macroscopic observation as porous and friable rocks, whose mineralogical composition is constituted by preponderant opaline amorphous silica, and quartz, clay minerals, and secondary carbonates.
Il principio dell’invenzione si basa essenzialmente sulla miscelazione all'interno di contenitori industriali di soluzioni di NaOH e di roccia diatomica. L’attuazione dell’invenzione sarà messa a punto in sito, ovvero direttamente nelle cave dì diatomiti, tenendo conto della diversità delle composizioni e delle percentuali di silice amorfa, di calcite e minerali secondari all’ interno della roccia diatomìtic stessa. Il processo di dissoluzione della silice amorfa contenuta all’interno della diatomite verrà condotto in condizioni di pressione e temperatura ambientali. The principle of the invention is essentially based on mixing NaOH and diatomic rock solutions inside industrial containers. The implementation of the invention will be developed on site, or directly in the diatomite quarries, taking into account the diversity of compositions and percentages of amorphous silica, calcite and secondary minerals within the diatomic rock itself. The dissolution process of the amorphous silica contained within the diatomite will be carried out under environmental pressure and temperature conditions.
A soluzione avvenuta, verrà effettuato un controllo sulla chimica del resìduo insolubile e della soluzione di sodio silicato. Poiché la produzione delle soluzioni di silicato di sodio è finalizzata in questa sede alla sintesi dei minerali zeolitici, ci sì prefigge dì conseguire delle soluzioni con preciso titolo, il quale può essere opportunamente modificato attraverso l'eventuale correzione con aggiunta di roccia diatomitica eo NaOH, e/o H20, Once the solution has been completed, a check will be made on the chemistry of the insoluble residue and the sodium silicate solution. Since the production of sodium silicate solutions is aimed here at the synthesis of zeolite minerals, the aim is to obtain solutions with a precise title, which can be suitably modified through the possible correction with the addition of diatomitic rock and / or NaOH, and / or H20,
E-F) ATTUAZIONE DELL<‘>INVENZIONE ED UTILIZZAZIONE IN AMBITO INDUSTRIALE. E-F) IMPLEMENTATION OF THE INVENTION AND USE IN THE INDUSTRIAL SECTOR.
La fattibilità della tecnica industriale e la conseguente finalizzazione delle soluzioni di Nasilicato alla sintesi zeolitica, sono state verificate in laboratorio seguendo il seguente protocollo: The feasibility of the industrial technique and the consequent finalization of the Nasilicate solutions to the zeolitic synthesis, have been verified in the laboratory following the following protocol:
-PRODUZIONE DEL SILICATO DI SODIO -PRODUCTION OF SODIUM SILICATE
Si è scelto un campione di roccia diatomitic a proveniente dalia Provincia di Albacete. caratterizzato dalla seguente composizione chimica: 86% di silice amorfa organogena, 8% di carbonati, 6% di frazione insolubile. Il campione di diatomite (112gr), è stato sottoposto ad attacco con soda (776 cc di NaOH all' 8%) al fine dì conseguire la dissoluzione della frazione fossilifera silicea, La miscela è stata posta all<'>interno dì contenitori in teflon, miscelata opportunamente attraverso agitatore magnetico, Dopo tale processo di agitazione, è seguita la flitrazione della soluzione la quale ha consentita di separare la soluzione di Na-silicato di composizione L6 NaOH — 1,6 SiO240 H2O. A diatomitic rock sample from the Province of Albacete was chosen. characterized by the following chemical composition: 86% of organogenic amorphous silica, 8% of carbonates, 6% of insoluble fraction. The sample of diatomite (112gr) was subjected to attack with soda (776 cc of NaOH at 8%) in order to achieve the dissolution of the siliceous fossiliferous fraction.The mixture was placed inside Teflon containers , suitably mixed by means of a magnetic stirrer, After this stirring process, the solution was filtered which allowed to separate the Na-silicate solution of composition L6 NaOH - 1.6 SiO240 H2O.
-IMPI EGO DEL SILICATO DI SODIO NEL PROCESSO DI SINTESI DELLA ZEOLITE Na-A. -EGO USES OF SODIUM SILICATE IN THE SYNTHESIS PROCESS OF ZEOLITE Na-A.
La produzione del silicato di sodio, è stata destinata, in questa sede alla sintesi della zeolite Na-A. Come noto, i processi di sintesi zeolitica prevedono la miscelazione, in condizioni idrotermali, di soluzioni di Na-Silicato e Na-alluminato, La produzione dellalluminato di sodio è stata conseguita attraverso opportuna miscelazione, all<'>interno di contenitori in teflon, di 120 gr di allumina Al(QH)3con 800 cc dì soda (20%). La soluzione ottenuta è stata successivamente posta in forno alla temperatura dì 100°C per un'ora. Alla fine del trattamento la composizione della soluzione ottenuta è risultata in: 1,6 Al( OH 3 - 4 NaOH-35.2 H2O. il processo di sintesi zeolitiea è stato condotto attraverso miscelazione, con agitatore magnetico, di 400cc della soluzione alluminatica con 388cc della soluzione silicatica. La composizione molare del sistema risulta; 2.8 NaOH - 0,8 Al(OH)3- 0,8 SiO2-37,6 IH2O. Il sistema è posto in forno alla temperature di The production of sodium silicate was destined here for the synthesis of Na-A zeolite. As known, the zeolite synthesis processes provide for the mixing, in hydrothermal conditions, of Na-Silicate and Na-aluminate solutions. The production of sodium aluminate was achieved through appropriate mixing, inside Teflon containers, of 120 g of alumina Al (QH) 3 with 800 cc of soda (20%). The solution obtained was subsequently placed in an oven at a temperature of 100 ° C for one hour. At the end of the treatment, the composition of the solution obtained resulted in: 1.6 Al (OH 3 - 4 NaOH-35.2 H2O. The zeolite synthesis process was carried out by mixing, with a magnetic stirrer, 400cc of the aluminatic solution with 388cc of the silicate solution. The molar composition of the system is: 2.8 NaOH - 0.8 Al (OH) 3- 0.8 SiO2-37.6 IH2O. The system is placed in an oven at a temperature of
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT000012A ITTE20090012A1 (en) | 2009-10-09 | 2009-10-09 | PROCEDURE FOR THE PRODUCTION OF SODIUM SILICATE INTENDED FOR THE SYNTHESIS OF NA-A ZEOLITE FROM DIATOMYTIC ROCKS. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT000012A ITTE20090012A1 (en) | 2009-10-09 | 2009-10-09 | PROCEDURE FOR THE PRODUCTION OF SODIUM SILICATE INTENDED FOR THE SYNTHESIS OF NA-A ZEOLITE FROM DIATOMYTIC ROCKS. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ITTE20090012A1 true ITTE20090012A1 (en) | 2011-04-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IT000012A ITTE20090012A1 (en) | 2009-10-09 | 2009-10-09 | PROCEDURE FOR THE PRODUCTION OF SODIUM SILICATE INTENDED FOR THE SYNTHESIS OF NA-A ZEOLITE FROM DIATOMYTIC ROCKS. |
Country Status (1)
| Country | Link |
|---|---|
| IT (1) | ITTE20090012A1 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1216124A (en) * | 1968-01-04 | 1970-12-16 | Columbian Carbon | Process for producing alkali metal silicates |
| RU1801945C (en) * | 1990-11-29 | 1993-03-15 | Научно-производственное объединение "Камень и силикаты" | Method of sodium silicate production showing molar ratio @@@=2, not less |
-
2009
- 2009-10-09 IT IT000012A patent/ITTE20090012A1/en unknown
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1216124A (en) * | 1968-01-04 | 1970-12-16 | Columbian Carbon | Process for producing alkali metal silicates |
| RU1801945C (en) * | 1990-11-29 | 1993-03-15 | Научно-производственное объединение "Камень и силикаты" | Method of sodium silicate production showing molar ratio @@@=2, not less |
Non-Patent Citations (5)
| Title |
|---|
| CHAISENA, A. ET. AL.: "Synthesis of sodium zeolites from natural and modified diatomite", MATERIALS LETTERS, vol. 59, 18 December 2004 (2004-12-18), pages 1474 - 1479, XP002668956, DOI: 10.1016/j.matlet.2004.10.073 * |
| DATABASE CA [online] CHEMICAL ABSTRACTS SERVICE, COLUMBUS, OHIO, US; 3 May 2007 (2007-05-03), TANAKA, HIDEKAZU ET AL: "Synthesis of Na-A zeolites from diatomaceous earth", XP002668966, retrieved from STN Database accession no. 146:404482 * |
| DATABASE WPI Week 199420, Derwent World Patents Index; AN 1994-165729, XP002668953 * |
| TANAKA, HIDEKAZU ET AL: "Synthesis of Na-A zeolites from diatomaceous earth", FUNTAI KOGAKU KAISHI , 44(2), 101-106 CODEN: FKKADA; ISSN: 0386-6157, 2007 * |
| WAJIMA, T. ET. AL.: "Zeolite synthesis from paper sludge ash at low temperature (90°C) with addition of diatomite", JOURNAL OF HAZARDOUS MATERIALS, vol. 132, 4 November 2005 (2005-11-04), pages 244 - 252, XP002668955, DOI: 10.1016/j.jhazmat.2005.09.045 * |
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