GB686626A - Improvements in or relating to dried silica gel type catalysts and method of producing the same - Google Patents

Improvements in or relating to dried silica gel type catalysts and method of producing the same

Info

Publication number
GB686626A
GB686626A GB28936/50A GB2893650A GB686626A GB 686626 A GB686626 A GB 686626A GB 28936/50 A GB28936/50 A GB 28936/50A GB 2893650 A GB2893650 A GB 2893650A GB 686626 A GB686626 A GB 686626A
Authority
GB
United Kingdom
Prior art keywords
per cent
grinding
silica gel
gel
magnesia
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
GB28936/50A
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.)
Wyeth Holdings LLC
Original Assignee
American Cyanamid 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 American Cyanamid Co filed Critical American Cyanamid Co
Publication of GB686626A publication Critical patent/GB686626A/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J21/00Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
    • B01J21/12Silica and alumina
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B33/00Silicon; Compounds thereof
    • C01B33/113Silicon oxides; Hydrates thereof

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Catalysts (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)

Abstract

A dried gel catalyst in the form of regular spheroids of predetermined particle size, is prepared by grinding a wet hydrous silica gel, incorporating therewith either before or after grinding a minor proportion of hydrated alumina and/or magnesia, and drying the catalyst to a water content of less than 20 per cent by dispersing a 4-10 per cent aqueous suspension of the ground particles into a current of hot gases at 600 DEG -1000 DEG F, the extent of grinding being such that at least 95 per cent of the wet gel passes a 30 mesh screen, at least 50 per cent passes an 80 mesh screen, while while at least 50 per cent is retained on a 300 mesh screen. The silica gel is prepared by adding sodium silicate solution to dilute sulphuric acid with stirring. Alumina is incorporated by adding aluminium sulphate solution followed by ammonia; magnesia is added in finely ground form. The gel is washed, either before or after incorporating the alumina and/or magnesia, until the alkali metal salt content is reduced to less than 0.1 per cent (as Na2O) on the dry basis. Washing may take place either before or after grinding. The catalyst is suitable for use in a fluidized process for the cracking of petroleum fractions.
GB28936/50A 1949-12-14 1950-11-27 Improvements in or relating to dried silica gel type catalysts and method of producing the same Expired GB686626A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US686626XA 1949-12-14 1949-12-14

Publications (1)

Publication Number Publication Date
GB686626A true GB686626A (en) 1953-01-28

Family

ID=22083962

Family Applications (1)

Application Number Title Priority Date Filing Date
GB28936/50A Expired GB686626A (en) 1949-12-14 1950-11-27 Improvements in or relating to dried silica gel type catalysts and method of producing the same

Country Status (1)

Country Link
GB (1) GB686626A (en)

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