GB1496667A - Granular calcium hypochlorite - Google Patents

Granular calcium hypochlorite

Info

Publication number
GB1496667A
GB1496667A GB5444574A GB5444574A GB1496667A GB 1496667 A GB1496667 A GB 1496667A GB 5444574 A GB5444574 A GB 5444574A GB 5444574 A GB5444574 A GB 5444574A GB 1496667 A GB1496667 A GB 1496667A
Authority
GB
United Kingdom
Prior art keywords
calcium hypochlorite
layers
granules
core
hypochlorite
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
GB5444574A
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.)
Olin Corp
Original Assignee
Olin 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 Olin Corp filed Critical Olin Corp
Priority to GB5444574A priority Critical patent/GB1496667A/en
Publication of GB1496667A publication Critical patent/GB1496667A/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
    • B01J2/16—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by suspending the powder material in a gas, e.g. in fluidised beds or as a falling curtain
    • 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
    • B01J2/12—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic in rotating drums
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B11/00—Oxides or oxyacids of halogens; Salts thereof
    • C01B11/04—Hypochlorous acid
    • C01B11/06—Hypochlorites
    • C01B11/068—Stabilisation by additives other than oxides, hydroxides, carbonates of alkali or alkaline-earth metals; Coating of particles; Shaping; Granulation

Abstract

1496667 Coated calcium hypochlorite granules OLIN CORP 17 Dec 1974 54445/74 Heading C1A [Also in Division Dl) Calcium hypochlorite granules having a smooth rounded surface comprise a core of calcium hypochlorite surrounded by a plurality of layers of an inorganic salt. The calcium hypochlorite granule may comprise a core of calcium hypochlorite having a diameter of from 200 to 2000 microns encapsulated with a plurality of layers of calcium hypochlorite the outer diameter of the layered particle being 400 to 5000 microns. These granules may be further coated with other inorganic salts. Inorganic salts mentioned are hydrated salts which are molten at temperatures below about 150‹ C. and solid at room temperature, e.g. hydrated aluminium sulphate with from 12 to 18 moles of water of hydration or hydrated magnesium sulphate with from 4 to 7 moles of water of hydration, and the chlorides, chlorates, nitrates, carbonates, silicates, phosphates, tetraborates, metaborates, sulphates, pyrophosphates, tripolyphosphates, hexametaphosphates and tetraphosphates of alkali metals. The calcium hypochlorite granules consisting of a core of calcium hypochlorite and a plurality of layers of the hypochlorite are less prone to dusting and fragmentation than conventional irregularly shaped products; coating with another inorganic salt improves the chemical and thermal stability of calcium hypochlorite particles. In Example 12 a calcium hypochlorite granule coated with layers of calcium hypochlorite is further coated with "Calnox" (Registered Trade Mark), a polyacrylic acid.
GB5444574A 1974-12-17 1974-12-17 Granular calcium hypochlorite Expired GB1496667A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB5444574A GB1496667A (en) 1974-12-17 1974-12-17 Granular calcium hypochlorite

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5444574A GB1496667A (en) 1974-12-17 1974-12-17 Granular calcium hypochlorite

Publications (1)

Publication Number Publication Date
GB1496667A true GB1496667A (en) 1977-12-30

Family

ID=10471012

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5444574A Expired GB1496667A (en) 1974-12-17 1974-12-17 Granular calcium hypochlorite

Country Status (1)

Country Link
GB (1) GB1496667A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019063681A1 (en) * 2017-09-29 2019-04-04 Thyssenkrupp Industrial Solutions Ag Method and assembly for producing coated prills or granulates, prills obtained therewith, and use thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019063681A1 (en) * 2017-09-29 2019-04-04 Thyssenkrupp Industrial Solutions Ag Method and assembly for producing coated prills or granulates, prills obtained therewith, and use thereof

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee