GB1125915A - Production of microspheres - Google Patents
Production of microspheresInfo
- Publication number
- GB1125915A GB1125915A GB1716966A GB1716966A GB1125915A GB 1125915 A GB1125915 A GB 1125915A GB 1716966 A GB1716966 A GB 1716966A GB 1716966 A GB1716966 A GB 1716966A GB 1125915 A GB1125915 A GB 1125915A
- Authority
- GB
- United Kingdom
- Prior art keywords
- microspheres
- aquasol
- mixture
- puo
- liquid medium
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
- B01J2/02—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by dividing the liquid material into drops, e.g. by spraying, and solidifying the drops
- B01J2/06—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by dividing the liquid material into drops, e.g. by spraying, and solidifying the drops in a liquid medium
- B01J2/08—Gelation of a colloidal solution
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
- B01J2/02—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by dividing the liquid material into drops, e.g. by spraying, and solidifying the drops
- B01J2/06—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by dividing the liquid material into drops, e.g. by spraying, and solidifying the drops in a liquid medium
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Carbon And Carbon Compounds (AREA)
- Manufacturing Of Micro-Capsules (AREA)
Abstract
1,125,915. Oxide and carbide microspheres. W. R. GRACE & CO. 19 April, 1966 [21 April, 1965], No. 17169/66. Heading C1A. [Also in Division G6] Metal oxide microspheres are made by mixing an aquasol of UO 3 , UO 2 , ThO 2 , PuO 2 , PuO 3 , ZrO 2 , BeO, Y 2 O 3 , or a mixture thereof, with an NH 3 -releasing agent, forming droplets of the mixture in a liquid medium in which water has a low solubility and whose temperature is high enough to release NH 3 from the agent and maintaining the droplets in contact with the liquid until they are solidified to microspheres. The term " aquasol " also includes aquasols that have been flocculated by reason of containing dissolved metal salts. The quantity of dissolved salt in the " aquasol " can be above 0À1 g./1. and less than the quantity required for flocculation. The aquasol can also contain a U<SP>4+</SP>, (UO 2 )<SP>2+</SP>, Th<SP>4+</SP>, Pu<SP>4+</SP>, (PuO 2 )<SP>2+</SP>, (ZrO)<SP>2+</SP>, Be<SP>2+</SP>, or Y<SP>3+</SP> salt or mixture thereof and/or carbon (to form carbides) and surfactants. The NH 3 -releasing agent can be hexamethylenetetramine, acetamide, ammonium carbamate, ammonium cyanate or urea or a mixture thereof. The amount of NH 3 -releasing agent used may be sufficient to adjust the pH of the aquasol to 1À0 to 0À1 pH units below the gelation pH of the sol., e.g. an amount at least suficient to provide 70% of the stoichiometric quantity of NH 3 required to precipitate the salt. The total concentration of metal compounds in the aquasol, expressed as the oxides can be from 1 to 500 g./1. The liquid medium can have a solubility for water of 1-30% wt., e.g. C 4 -C 10 alcohol. The droplets and liquid medium can flow concurrently or countercurrently. The microspheres produced can be washed, dried and sintered to form the final microsphere pro - duct. Microspheres of a size range of 50-400Á are disclosed. The microspheres can be used as a nuclear fuel.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US449867A US3312632A (en) | 1965-04-21 | 1965-04-21 | Method for making metal oxide microspheres |
US506231A US3345437A (en) | 1965-11-03 | 1965-11-03 | Sol-gel microsphere forming process using dissolved ammonia in the dehydrating solvent |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1125915A true GB1125915A (en) | 1968-09-05 |
Family
ID=27035846
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1716966A Expired GB1125915A (en) | 1965-04-21 | 1966-04-19 | Production of microspheres |
GB4798566A Expired GB1158742A (en) | 1965-04-21 | 1966-10-26 | Production of Microspheres |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4798566A Expired GB1158742A (en) | 1965-04-21 | 1966-10-26 | Production of Microspheres |
Country Status (3)
Country | Link |
---|---|
DE (2) | DE1542179B1 (en) |
GB (2) | GB1125915A (en) |
NL (2) | NL6605275A (en) |
-
1966
- 1966-04-19 GB GB1716966A patent/GB1125915A/en not_active Expired
- 1966-04-19 DE DE19661542179D patent/DE1542179B1/en active Pending
- 1966-04-20 NL NL6605275A patent/NL6605275A/xx unknown
- 1966-10-26 GB GB4798566A patent/GB1158742A/en not_active Expired
- 1966-10-29 DE DE19661542191 patent/DE1542191A1/en active Pending
- 1966-11-02 NL NL6615444A patent/NL6615444A/xx unknown
Also Published As
Publication number | Publication date |
---|---|
NL6615444A (en) | 1967-05-05 |
NL6605275A (en) | 1966-10-24 |
DE1542179B1 (en) | 1970-11-12 |
DE1542191A1 (en) | 1971-02-25 |
GB1158742A (en) | 1969-07-16 |
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