ES470368A1 - Procedimiento para preparar zeolita a - Google Patents

Procedimiento para preparar zeolita a

Info

Publication number
ES470368A1
ES470368A1 ES470368A ES470368A ES470368A1 ES 470368 A1 ES470368 A1 ES 470368A1 ES 470368 A ES470368 A ES 470368A ES 470368 A ES470368 A ES 470368A ES 470368 A1 ES470368 A1 ES 470368A1
Authority
ES
Spain
Prior art keywords
mineral
calcined
aqueous mixture
candita
less
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.)
Expired
Application number
ES470368A
Other languages
English (en)
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.)
Imerys Minerals Ltd
Original Assignee
Imerys Minerals Ltd
English Clays Lovering Pochin Co Ltd
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 Imerys Minerals Ltd, English Clays Lovering Pochin Co Ltd filed Critical Imerys Minerals Ltd
Publication of ES470368A1 publication Critical patent/ES470368A1/es
Expired legal-status Critical Current

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
    • C01B33/26—Aluminium-containing silicates, i.e. silico-aluminates
    • C01B33/28—Base exchange silicates, e.g. zeolites
    • C01B33/2807—Zeolitic 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
    • C01B33/2815—Zeolitic 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 type A (UNION CARBIDE trade name; corresponds to GRACE's types Z-12 or Z-12L)
    • C01B33/283—Zeolitic 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 type A (UNION CARBIDE trade name; corresponds to GRACE's types Z-12 or Z-12L) from a reaction mixture containing at least one aluminium silicate or aluminosilicate of a clay-type, e.g. kaolin or metakaolin or its exotherm modification or allophane

Landscapes

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

Abstract

Procedimiento para preparar zeolita A, a partir de un mineral del grupo de la candita, caracterizado porque comprende las etapas: a) calcinar un mineral del grupo de la candita que está sustancialmente libre de agregados y que prácticamente no tiene asociado con el mismo ningún hierro superficial n9i más de 0,5 % en peso de hierro intersticial, efectuándose la calcinación a una temperatura del orden de 550 a 925ºC y durante un tiempo tal que la pérdida tras ignición durante 2 horas a 1.000ºC de una muestra del mineral calcinado sea inferior a 1 % en peso, para formar un mineral de candita calcinado; b) preparar una mezcla acuosa del mineral de candita calcinado y una solución acuosa de hidróxido sódico de concentración no inferior a 5 M aproximadamente, es decir no inferior a 5 molar aproximadamente, siendo tales las proporciones de mineral de candita calcinado e hidróxido sódico en la mezcla acuosa que la relación molar Na2O/SiO2 sea del orden de 0,5 a 1,5; c) calentar la mezcla acuosa a una temperatura de 60 a 100ºC durante un tiempo de 2 a 8 horas, para formar la zeolita A deseada; y d) separar zeolita A cristalina de la mezcla acuosa.
ES470368A 1977-05-31 1978-05-31 Procedimiento para preparar zeolita a Expired ES470368A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2304977A GB1603084A (en) 1977-05-31 1977-05-31 Zeolites

Publications (1)

Publication Number Publication Date
ES470368A1 true ES470368A1 (es) 1979-01-16

Family

ID=10189284

Family Applications (1)

Application Number Title Priority Date Filing Date
ES470368A Expired ES470368A1 (es) 1977-05-31 1978-05-31 Procedimiento para preparar zeolita a

Country Status (5)

Country Link
CA (1) CA1101825A (es)
DE (1) DE2823927C2 (es)
ES (1) ES470368A1 (es)
FR (1) FR2392934A1 (es)
GB (1) GB1603084A (es)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2125390B (en) * 1982-08-16 1985-12-24 Ici Plc Preparation of zeolites
US5089056A (en) * 1989-04-21 1992-02-18 Thiele Kaolin Company Opacifying kaolin pigments and process for making same by reacting with sodium hydroxide in water
DE10142899B4 (de) * 2000-09-04 2006-01-19 Bundesrepublik Deutschland, vertreten durch den Präsidenten der Bundesanstalt für Geowissenschaften und Rohstoffe Verfahren zur Synthese von hochreinem NaA-Zeolith aus unaufbereiteten allophanreichen Lehmen

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3114603A (en) * 1960-01-15 1963-12-17 Union Carbide Corp Process for synthetic zeolite a
FR1264441A (fr) * 1960-08-05 1961-06-19 Grace W R & Co Procédé de préparation de zéolites synthétiques cristallines

Also Published As

Publication number Publication date
FR2392934B1 (es) 1983-08-19
GB1603084A (en) 1981-11-18
FR2392934A1 (fr) 1978-12-29
DE2823927A1 (de) 1978-12-14
CA1101825A (en) 1981-05-26
DE2823927C2 (de) 1987-01-22

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