GB724457A - Process for the production of finely divided silica and alkali metal formate - Google Patents
Process for the production of finely divided silica and alkali metal formateInfo
- Publication number
- GB724457A GB724457A GB7937/53A GB793753A GB724457A GB 724457 A GB724457 A GB 724457A GB 7937/53 A GB7937/53 A GB 7937/53A GB 793753 A GB793753 A GB 793753A GB 724457 A GB724457 A GB 724457A
- Authority
- GB
- United Kingdom
- Prior art keywords
- alkali metal
- solution
- silica
- metal formate
- finely divided
- 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
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/113—Silicon oxides; Hydrates thereof
- C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
- C01B33/18—Preparation of finely divided silica neither in sol nor in gel form; After-treatment thereof
- C01B33/187—Preparation of finely divided silica neither in sol nor in gel form; After-treatment thereof by acidic treatment of silicates
- C01B33/193—Preparation of finely divided silica neither in sol nor in gel form; After-treatment thereof by acidic treatment of silicates of aqueous solutions of silicates
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/10—Preparation of carboxylic acids or their salts, halides or anhydrides by reaction with carbon monoxide
-
- 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
- C01P2006/11—Powder tap 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
- C01P2006/22—Rheological behaviour as dispersion, e.g. viscosity, sedimentation stability
-
- 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)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Silicon Compounds (AREA)
Abstract
Alkali metal formate, together with finely divided silica, is produced by reacting an aqueous solution of an alkali metal silicate of a concentration not exceeding 20 per cent (w/v) with carbon monoxide at a temperature above 100 DEG C. while intensely mixing or stirring the solution at increased pressure. The process may be operated continuously by withdrawing a portion of the treated solution after separation of silica for the recovery of alkali metal formate, making up the remainder with fresh aqueous alkali metal silicate solution and recycling. The treated solution leaving the reaction vessel may become substantially saturated with alkali metal formate.ALSO:Finely divided silica, together with alkali metal formate, is produced by reacting an aqueous solution of an alkali metal silicate of a concentration not exceeding 20 per cent. (w/v) with carbon monoxide at a temperature above 100 DEG C. while intensely mixing or stirring the solution at increased pressure. The process may be operated continuously by withdrawing a portion of the treated solution after separation of silica for the recovery of alkali metal formate, making up the remainder with fresh aqueous alkali metal silicate solution, and recycling. The treated solution leaving the reaction vessel may become substantially saturated with alkali metal formate. The silica may be precipitated in the presence of a protective colloid which imparts hydrophobic properties to the precipitated silica, for example stearic acid and organic amines.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE724457X | 1952-04-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB724457A true GB724457A (en) | 1955-02-23 |
Family
ID=6634302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7937/53A Expired GB724457A (en) | 1952-04-24 | 1953-03-23 | Process for the production of finely divided silica and alkali metal formate |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB724457A (en) |
-
1953
- 1953-03-23 GB GB7937/53A patent/GB724457A/en not_active Expired
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