GB530858A - Improvements in zinc oxide - Google Patents
Improvements in zinc oxideInfo
- Publication number
- GB530858A GB530858A GB19022/39A GB1902239A GB530858A GB 530858 A GB530858 A GB 530858A GB 19022/39 A GB19022/39 A GB 19022/39A GB 1902239 A GB1902239 A GB 1902239A GB 530858 A GB530858 A GB 530858A
- Authority
- GB
- United Kingdom
- Prior art keywords
- air
- zinc oxide
- zinc
- heated
- combustion zone
- 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
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G9/00—Compounds of zinc
- C01G9/02—Oxides; Hydroxides
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
Abstract
530,858. Preparing zinc oxide. NON FERROUS METAL PRODUCTS, Ltd. June 29, 1939, No. 19022. Convention date, June 29, 1938. [Class 1 (iii)] Acicular zinc oxide is made by introducing a stream of substantially undiluted zinc vapour into a combustion zone of controlled temperature, burning the zinc vapour in the zone in a current of pre-heated air, and regulating the temperature of the combustion zone in the neighbourhood of 1225-1250‹C. in order to control twinning of the particles of zinc oxide produced. When the temperature of the combustion zone is maintained in excess of 1250‹C., the resulting zinc oxide particles are in the form of single acicular crystals, but when the temperature is mainained below 1225‹C., the particles obtained are in the form of complex twinned acicular crystals, such as threelings or fourlings. When the air is only moderately pre-heated, e.g. to 500‹C., the current should be slow and only in slight excess of that required to oxidize the zinc vapour, while if the air is intensely pre-heated, e.g. to 1000‹C., the current may be rapid and in great excess. In either case the air may be pre-heated by bringing it into countercurrent heat exchange relationship with the hot gases escaping from the combustion zone. An apparatus, suitable for carrying out the process, comprises a retort 10 for vaporizing metallic zinc, a duct 13 for zinc vapour, an air-preheating chamber 20, an annular heating jacket 15, a combustion chamber 19, a fan 23, and a zinc oxide collecting bag 25. Air enters the chamber 20 at 29. Pyrometers 27, 28, and a valve 26 for false air, are provided. Specification 406,560, [Group II], is referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US530858XA | 1938-06-29 | 1938-06-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB530858A true GB530858A (en) | 1940-12-23 |
Family
ID=21981843
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB19022/39A Expired GB530858A (en) | 1938-06-29 | 1939-06-29 | Improvements in zinc oxide |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB530858A (en) |
-
1939
- 1939-06-29 GB GB19022/39A patent/GB530858A/en not_active Expired
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