GB827634A - Improvements in or relating to lead pigments and methods of preparing the same - Google Patents
Improvements in or relating to lead pigments and methods of preparing the sameInfo
- Publication number
- GB827634A GB827634A GB36631/57A GB3663157A GB827634A GB 827634 A GB827634 A GB 827634A GB 36631/57 A GB36631/57 A GB 36631/57A GB 3663157 A GB3663157 A GB 3663157A GB 827634 A GB827634 A GB 827634A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pbo
- litharge
- excess
- mol
- silica
- 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
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
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Pigments, Carbon Blacks, Or Wood Stains (AREA)
Abstract
A pigment comprises PbO, P2O5 and SiO2 in physico-chemical combination, such combination being brought about by calcination of the intimately mixed oxides. The oxides may be pebble-milled together before calcination; but the preferred method is to add a solution of a soluble phosphate to a slurry of silica and litharge, then de-water and calcine the solids portion of the slurry, the amount of litharge being in excess of that required to react with the P2O5 and the amount of silica in excess of that required to react with the excess PbO. There may be from 0.75 mol. to 7.5 mols. of SiO2 per mol. of PbO and from 1/8 to 1/2 mol. of P2O5 per mol. of PbO. Suitable starting materials are litharge, precipitated silica or ground quartzite, and phosphoric acid or monoor diammonium phosphate. The calcination step is effected at from 500 DEG to 850 DEG C. Specifications 637,304 and 726,191 are referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US827634XA | 1956-11-30 | 1956-11-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB827634A true GB827634A (en) | 1960-02-10 |
Family
ID=22173295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB36631/57A Expired GB827634A (en) | 1956-11-30 | 1957-11-25 | Improvements in or relating to lead pigments and methods of preparing the same |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR1187368A (en) |
| GB (1) | GB827634A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0015794B1 (en) * | 1979-02-22 | 1984-05-30 | Rhone-Poulenc Chimie De Base | Process for obtaining a glass composition based on metallic silicates and having a low melting point and improved refining properties |
-
1957
- 1957-11-25 GB GB36631/57A patent/GB827634A/en not_active Expired
- 1957-11-29 FR FR1187368D patent/FR1187368A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR1187368A (en) | 1959-09-10 |
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