GB828936A - Crystalline zeolite z and method for preparing same - Google Patents

Crystalline zeolite z and method for preparing same

Info

Publication number
GB828936A
GB828936A GB6377/57A GB637757A GB828936A GB 828936 A GB828936 A GB 828936A GB 6377/57 A GB6377/57 A GB 6377/57A GB 637757 A GB637757 A GB 637757A GB 828936 A GB828936 A GB 828936A
Authority
GB
United Kingdom
Prior art keywords
zeolite
potassium
al2o3
gel
composition
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
GB6377/57A
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.)
Union Carbide Corp
Original Assignee
Union Carbide Corp
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 Union Carbide Corp filed Critical Union Carbide Corp
Publication of GB828936A publication Critical patent/GB828936A/en
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
    • C01B33/2869—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 other types characterised by an X-ray spectrum and a definite composition

Landscapes

  • 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)

Abstract

A synthetic zeolitic molecular sieve of composition K2O : Al2O3 : 2SiO2 : XH2O, where X is any value up to 3, designated as zeolite Z, is prepared by forming a gel having a composition K2O : Al2O3 : nSiO2, where n is from 1 to 7, from an aqueous solution containing materials supplying oxides of potassium, aluminium and silicon, holding the gel at a temperature of at least 100 DEG C. in the presence of potassium <PICT:0828936/III/1> hydroxide, the temperature and gel composition being correlated to fall within the shaded area shown in Fig. 1. Crystals of zeolite Z in potassium form, are finally separated. Other forms of zeolite Z are prepared by exchanging the potassium cation for other ions such as sodium or calcium by treating with nitrates or chlorides of these latter metals. The X-ray characteristics of the potassium form of zeolite Z are quoted. According to an example, potassium hydroxide, aluminium hydroxide and silicic acid, containing 15% by weight silica, were mixed in a mol. ratio K2O : Al2O3 : 4SiO2 and the gel which formed was dried and mixed with potassium hydroxide solution to form a mixture having a molar composition K2O/SiO2 =0.58, SiO2/Al2O3=4 and H2O/K2O=316, the mixture was heated at 120 DEG C. for 3 to 4 days and the product was filtered, washed and dried. The trihydrated zeolite obtained was dehydrated at 300 DEG C. Zeolite Z may be used to absorb water and ammonia from mixtures with other materials.
GB6377/57A 1956-02-29 1957-02-26 Crystalline zeolite z and method for preparing same Expired GB828936A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US828936XA 1956-02-29 1956-02-29

Publications (1)

Publication Number Publication Date
GB828936A true GB828936A (en) 1960-02-24

Family

ID=22174122

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6377/57A Expired GB828936A (en) 1956-02-29 1957-02-26 Crystalline zeolite z and method for preparing same

Country Status (1)

Country Link
GB (1) GB828936A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5015453A (en) * 1989-04-28 1991-05-14 W. R. Grace & Co.-Conn. Crystalline group IVA metal-containing molecular sieve compositions

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5015453A (en) * 1989-04-28 1991-05-14 W. R. Grace & Co.-Conn. Crystalline group IVA metal-containing molecular sieve compositions

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