GB522362A - Improvements in or relating to the preparation of lead-sulphate products, particularly adapted for use as pigments - Google Patents

Improvements in or relating to the preparation of lead-sulphate products, particularly adapted for use as pigments

Info

Publication number
GB522362A
GB522362A GB35535/38A GB3553538A GB522362A GB 522362 A GB522362 A GB 522362A GB 35535/38 A GB35535/38 A GB 35535/38A GB 3553538 A GB3553538 A GB 3553538A GB 522362 A GB522362 A GB 522362A
Authority
GB
United Kingdom
Prior art keywords
lead
sulphate
sulphuric acid
stages
slurry
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
GB35535/38A
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.)
NAT LEAD CO
NL Industries Inc
Original Assignee
NAT LEAD CO
NL Industries Inc
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 NAT LEAD CO, NL Industries Inc filed Critical NAT LEAD CO
Publication of GB522362A publication Critical patent/GB522362A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
    • C09C1/14—Compounds of lead
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2002/00—Crystal-structural characteristics
    • C01P2002/50—Solid solutions
    • C01P2002/52—Solid solutions containing elements as dopants
    • C01P2002/54—Solid solutions containing elements as dopants one element only
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/10—Particle morphology extending in one dimension, e.g. needle-like
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/60—Particles characterised by their size
    • C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/10—Solid density
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/60—Optical properties, e.g. expressed in CIELAB-values
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/80—Compositional purity
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/80—Compositional purity
    • C01P2006/82—Compositional purity water content
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/90—Other properties not specified above

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Pigments, Carbon Blacks, Or Wood Stains (AREA)

Abstract

522,362. Lead sulphate. NATIONAL LEAD CO. Dec. 6, 1938, No. 35535. Convention date, Dec. 6, 1937. [Class 1 (iii)] A lead sulphate-containing pigment is made by reacting a lead oxide slurry containing a sulphation promoting catalyst with sulphuric acid until all the lead is converted into hydrated tribasic lead sulphate and then reacting on the tribasic sulphate with further sulphuric acid until it is substantially converted to a thickened mass of acicular crystals of the monobasic lead sulphate. Further sulphuric acid may be added to convert between 20 and 60 per cent., preferably 37 per cent., of the mass to normal sulphate. The crystals retain their acicular form. A slurry consisting of acetic acid, lead oxide and water in the proportions, for example, of 1:60:520 is placed in a container. Air is blown through to oxidize any metallic lead and to agitate the mixture, agitation being assisted by a mechanical mixer. The reaction is carried out at from 60-95‹C. preferably at about 80‹C. The sulphuric acid of the second and third stages is added slowly and uniformly, the time for these two stages being 3¢-4¢ hours, the whole process taking 5-6 hours. The end point of stages 1 and 2 is marked by a sudden increase in electrical resistance of the slurry. The final product is suitable as a pigment without further treatment.
GB35535/38A 1937-12-06 1938-12-06 Improvements in or relating to the preparation of lead-sulphate products, particularly adapted for use as pigments Expired GB522362A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US522362XA 1937-12-06 1937-12-06

Publications (1)

Publication Number Publication Date
GB522362A true GB522362A (en) 1940-06-17

Family

ID=21976276

Family Applications (1)

Application Number Title Priority Date Filing Date
GB35535/38A Expired GB522362A (en) 1937-12-06 1938-12-06 Improvements in or relating to the preparation of lead-sulphate products, particularly adapted for use as pigments

Country Status (1)

Country Link
GB (1) GB522362A (en)

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