GB986596A - A process for the production of silica-bonded bead granules from solids in powder form - Google Patents

A process for the production of silica-bonded bead granules from solids in powder form

Info

Publication number
GB986596A
GB986596A GB4025263A GB4025263A GB986596A GB 986596 A GB986596 A GB 986596A GB 4025263 A GB4025263 A GB 4025263A GB 4025263 A GB4025263 A GB 4025263A GB 986596 A GB986596 A GB 986596A
Authority
GB
United Kingdom
Prior art keywords
suspension
solids
water
silica sol
sol
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
GB4025263A
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.)
Bayer AG
Original Assignee
Bayer AG
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 Bayer AG filed Critical Bayer AG
Publication of GB986596A publication Critical patent/GB986596A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
    • B01J2/02—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by dividing the liquid material into drops, e.g. by spraying, and solidifying the drops
    • B01J2/06—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by dividing the liquid material into drops, e.g. by spraying, and solidifying the drops in a liquid medium
    • B01J2/08—Gelation of a colloidal solution
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
    • B01J2/28—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic using special binding agents

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Silicon Compounds (AREA)

Abstract

Substantially spherical silica-bonded granules of pulverous solids are produced by stirring the solids (which are not powdery molecular sieve zeolites and do not cause aqueous silica sols to gel) with an aqueous silica sol to form a flowable suspension with a pH below 10, mixing the suspension with 0.05 to 0.2 parts by volume (per part of silica sol suspension) of a second suspension of finely divided magnesium oxide in water, and distributing the mixture in drop form in a liquid immiscible with water in a manner known per se until sol-gel conversion commences. Suitable solids are ferric oxide, zinc oxide, carbonates, copper oxychloride, aluminium phosphate, bleaching earth.ALSO:Substantially spherical silica-bonded granules of pulverous solids are produced by stirring the solids (which are not powdery molecular seive zeolites and do not cause aqueous silica sol to gel) with an aqueous silica sol to form a flowable suspension with a pH below 10, mixing the suspension with 0,05-0,2 parts by volume (per part of silica sol suspension) of a second suspension of finely divided magnesium oxide in water, and distributing the mixture in drop form in a liquid immiscible with water in a manner known per se until sol-gel conversion commences. Suitable solids are ferric oxide, zinc oxide, carbonates, copper oxychloride, aluminium phosphate, bleaching earth, ground ion exchange resins.
GB4025263A 1962-10-13 1963-10-11 A process for the production of silica-bonded bead granules from solids in powder form Expired GB986596A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEF38033A DE1187588B (en) 1962-10-13 1962-10-13 Production of pearl granules from powdery solids

Publications (1)

Publication Number Publication Date
GB986596A true GB986596A (en) 1965-03-17

Family

ID=7097187

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4025263A Expired GB986596A (en) 1962-10-13 1963-10-11 A process for the production of silica-bonded bead granules from solids in powder form

Country Status (3)

Country Link
DE (1) DE1187588B (en)
GB (1) GB986596A (en)
NL (2) NL140427B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE29145E (en) 1969-05-23 1977-03-01 Bayer Aktiengesellschaft Catalyst for sulfuric acid contact process

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113372035B (en) * 2021-07-23 2022-07-26 新兴栈(绵阳)建材有限公司 Anti-segregation agent for concrete and preparation method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE29145E (en) 1969-05-23 1977-03-01 Bayer Aktiengesellschaft Catalyst for sulfuric acid contact process

Also Published As

Publication number Publication date
NL140427B (en) 1973-12-17
DE1187588B (en) 1965-02-25
NL298996A (en)

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