GB956515A - Process for reducing particle size - Google Patents

Process for reducing particle size

Info

Publication number
GB956515A
GB956515A GB1036162A GB1036162A GB956515A GB 956515 A GB956515 A GB 956515A GB 1036162 A GB1036162 A GB 1036162A GB 1036162 A GB1036162 A GB 1036162A GB 956515 A GB956515 A GB 956515A
Authority
GB
United Kingdom
Prior art keywords
pigment
grinding elements
pulverisable
benzene
toluene
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
GB1036162A
Inventor
Gordon Barron
John Mitchell
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.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries Ltd
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 Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Priority to GB1036162A priority Critical patent/GB956515A/en
Publication of GB956515A publication Critical patent/GB956515A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
    • B24B31/12—Accessories; Protective equipment or safety devices; Installations for exhaustion of dust or for sound absorption specially adapted for machines covered by group B24B31/00
    • B24B31/14—Abrading-bodies specially designed for tumbling apparatus, e.g. abrading-balls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C19/00—Other disintegrating devices or methods
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C19/00—Other disintegrating devices or methods
    • B02C19/0056—Other disintegrating devices or methods specially adapted for specific materials not otherwise provided for
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B67/00—Influencing the physical, e.g. the dyeing or printing properties of dyestuffs without chemical reactions, e.g. by treating with solvents grinding or grinding assistants, coating of pigments or dyes; Process features in the making of dyestuff preparations; Dyestuff preparations of a special physical nature, e.g. tablets, films
    • C09B67/0001—Post-treatment of organic pigments or dyes
    • C09B67/0022—Wet grinding of pigments

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Pigments, Carbon Blacks, Or Wood Stains (AREA)

Abstract

In a process for reducing the particle size of a pulverizable pigment, the pigment is agitated with particulate grinding elements such as sand or beads composed of glass, alumina, silica or non-friable plastic materials, the majority of said grinding elements ranging in size from 0.25 to 2.5 mm., and an organic liquid which has a surface tension not greater than 40 dynes per cm. at 20 DEG C. and which is substantially a non-solvent for the pigment. Where the process is worked continuously the liquid medium, which may be kerosene, benzene, toluene, xylene, trichloroethylene, a chloro-benzene, methanol, ethylene-glycol monoethyl or monomethyl ether, ethanol, a chloro-toluene, isopropanol, isobutanol, acetone, methyl ethyl ketone or "white spirit," and the pigment are introduced continuously into a vessel containing the grinding elements, which are agitated, and the suspension of pigment is removed via a pipe and a gauze filter, the vessel being kept cool. The pigment may be isolated by filtering, distilling, centrifuging or steam distilling. In the examples, copper chlorophthalocyanine, copper phthalocyanine, acid pastoo copper phthalocyanine, dibromo-anthanthrone, 2:4-dinitrobenzeneazo - b - naphthol, iron oxide, lead chromate, 1:11:5:111 - trianthrimide, Bordeaux pigment, violet triphendioxazine pigment, and flavanthrone are treated by the above process. Specifications 293,071, 686,234, 810,005, 911,825 and U.S.A. Specification 2,486,351 are referred to.ALSO:A process for reducing the particle size of a pulverisable solid comprises agitating the solid with particulate grinding elements such as sand or beads of glass, alumina, silica or non-pliable plastic materials, the majority of said elements ranging in size from 0,25-2,5 mm., and an organic liquid, having a surface tension not greater than 40 dynes per cm. at 20 DEG C., which is substantially a non-solvent for the pulverisable solid. The organic liquid may be, e.g., kerosene, "white spirit", benzene, toluene, xylene, trichloroethylene, a chlorobenzene, a chlorotoluene, methanol, ethanol, isopropanol, isobutanol, ethylene glycol, mono-methyl or mono-ethyl ether, acetone or methyl ethyl ketone. Examples are given of p pulverisable solids which are dyestuffs or paint pigments (see Division C4) treated by the above process. Specifications 293,071, 686,234, 810,005, 911,825 and U.S.A. Specification 2,486,351 are referred to.
GB1036162A 1962-03-19 1962-03-19 Process for reducing particle size Expired GB956515A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1036162A GB956515A (en) 1962-03-19 1962-03-19 Process for reducing particle size

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1036162A GB956515A (en) 1962-03-19 1962-03-19 Process for reducing particle size

Publications (1)

Publication Number Publication Date
GB956515A true GB956515A (en) 1964-04-29

Family

ID=9966431

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1036162A Expired GB956515A (en) 1962-03-19 1962-03-19 Process for reducing particle size

Country Status (1)

Country Link
GB (1) GB956515A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3593927A (en) * 1967-07-12 1971-07-20 Ici Australia Ltd Process of comminution of an aqueous suspension of copper phthalocyanine
FR2404031A1 (en) * 1977-09-22 1979-04-20 Hoechst Ag FINE DISPERSION PROCESS OF PIGMENTS FROM THE DIOXAZINE SERIES
GB2190016A (en) * 1985-08-01 1987-11-11 English Clays Lovering Pochin Comminution of material

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3593927A (en) * 1967-07-12 1971-07-20 Ici Australia Ltd Process of comminution of an aqueous suspension of copper phthalocyanine
FR2404031A1 (en) * 1977-09-22 1979-04-20 Hoechst Ag FINE DISPERSION PROCESS OF PIGMENTS FROM THE DIOXAZINE SERIES
US4253839A (en) * 1977-09-22 1981-03-03 Hoechst Aktiengesellschaft Process for the fine distribution of pigments of the dioxazine series
GB2190016A (en) * 1985-08-01 1987-11-11 English Clays Lovering Pochin Comminution of material
GB2190016B (en) * 1985-08-01 1989-07-26 Ecc Int Ltd Communition of material

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