GB979274A - Process for the preparation of zeolitic molecular sieves from clay minerals - Google Patents

Process for the preparation of zeolitic molecular sieves from clay minerals

Info

Publication number
GB979274A
GB979274A GB1142762A GB1142762A GB979274A GB 979274 A GB979274 A GB 979274A GB 1142762 A GB1142762 A GB 1142762A GB 1142762 A GB1142762 A GB 1142762A GB 979274 A GB979274 A GB 979274A
Authority
GB
United Kingdom
Prior art keywords
naoh
parts
treating
precipitate
weight
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
GB1142762A
Inventor
Ralph Burgess Mason
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.)
ExxonMobil Technology and Engineering Co
Original Assignee
Exxon Research and Engineering Co
Esso Research and Engineering Co
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 Exxon Research and Engineering Co, Esso Research and Engineering Co filed Critical Exxon Research and Engineering Co
Priority to GB1142762A priority Critical patent/GB979274A/en
Publication of GB979274A publication Critical patent/GB979274A/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
    • C01B33/2815—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)

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

Crystalline zeolite and solvents having molecular sieve properties and a pore size of 4 <\>rA units are prepared by first treating an uncalcined silica-alumina clay with sodium hydroxide solution to form a sodium alumino-silicate precipitate which does not have molecular sieve properties; treating the precipitate with sufficient mineral acid to convert it at a pH of 3 to 4 to an acidic colloidal product in which ionexchanging properties are retained; and thereafter treating the acidic colloidal product at temperatures of from 180-220 DEG F. with a dilute sodium hydroxide solution containing from 40-160 parts by weight of NaOH and from 170-3600 parts by weight of water per 100 parts of the said sodium alumino-silicate precipitate, the molar ratio of H2O to NaOH in the solution being in the range from 30-100. The first alkali treatment may be carried out at a temperature of from 200-800 DEG F., the alkali preferably has a concentration of 3 to 30 g. NaOH per 100 ml. of solution and the amount of alkali based on clay is preferably 0.4-4 weight ratio. Alumina-silicate clays used in the process are kaolin, kaolinite, halloysite, bentonite and bauxite.
GB1142762A 1962-03-26 1962-03-26 Process for the preparation of zeolitic molecular sieves from clay minerals Expired GB979274A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1142762A GB979274A (en) 1962-03-26 1962-03-26 Process for the preparation of zeolitic molecular sieves from clay minerals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1142762A GB979274A (en) 1962-03-26 1962-03-26 Process for the preparation of zeolitic molecular sieves from clay minerals

Publications (1)

Publication Number Publication Date
GB979274A true GB979274A (en) 1965-01-01

Family

ID=9986042

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1142762A Expired GB979274A (en) 1962-03-26 1962-03-26 Process for the preparation of zeolitic molecular sieves from clay minerals

Country Status (1)

Country Link
GB (1) GB979274A (en)

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