Jacob J Mu

US Patent:

54240522, Jun 13, 1995

Filed:

Nov 24, 1993

Appl. No.:

8/157755

Inventors:

Paul F. Jacobs - Orange CA
Jacob J. Mu - Irvine CA
Richard P. Fisher - Hesperia CA

Assignee:

U.S. Borax Inc. - Valencia CA

International Classification:

C01B 3510

US Classification:

423278

Abstract:

Amorphous boric oxide-containing product having about 85 to 92% B. sub. 2 O. sub. 3 is produced by heating boric acid at an elevated temperature of up to about 275. degree. C. to dehydrate the boric acid and form a molten glass which is cooled to a solid glassy product. This solid glass can be comminuted to produce a particulate product. Preferably the boric acid is heated at 220. degree. to 275. degree. C. , with about 250. degree. to 270. degree. C. being most preferred. The process is readily adapted to a continuous process in which the boric acid is placed on a moving continuous steel belt and conveyed through a heating zone. The molten glassy product is cooled to form a solid glassy product which is removed from the belt and comminuted to a desirable particle size range.

US Patent:

44204663, Dec 13, 1983

Filed:

May 10, 1982

Appl. No.:

6/376341

Inventors:

Won C. Park - Irvine CA
Jacob J. Mu - Santa Ana CA

Assignee:

Occidental Research Corporation - Irvine CA

International Classification:

C01B 2512
C01B 2516
C01B 2501
C01B 2502

US Classification:

423304

Abstract:

A process for producing phosphorus pentoxide from phosphate ore includes the mixing and formulation of a feed mixture of phosphate ore with lime and solid carbonaceous material in amounts to produce a feed mixture having a CaO/SiO. sub. 2 mole ratio greater than about 8. This mixture is formed into pellets which are then exposed to radiation eminating from an oxidation zone, preferably within a rotary type kiln, in order to heat the pellets to a temperature sufficient to reduce the phosphate by reaction with the solid carbonaceous material to form elemental phosphorus vapor without substantial melting of the pellets. Sufficient oxygen-containing gas is provided to cause oxidation of the elemental phosphorus vapor within the oxidation zone to produce phosphorus pentoxide.

US Patent:

43978266, Aug 9, 1983

Filed:

May 10, 1982

Appl. No.:

6/376799

Inventors:

Robert A. Hard - Laguna Beach CA
Jacob J. Mu - Santa Ana CA

Assignee:

Occidental Research Corporation - Irvine CA

International Classification:

C01B 2512

US Classification:

423304

Abstract:

A process for producing phosphorus pentoxide from phosphate ore includes the steps of mixing phosphate ore containing silica with solid carbonaceous material and a silica fluxing agent to form a feed mixture and thereafter forming the feed mixture into pellets. Alternatively, pellets may be formed using phosphate ore containing silica and carbonaceous material which are then coated with a silica fluxing agent. The pellets are heated by exposure to radiation eminating from an oxidation zone within a kiln to a temperature enabling the silica fluxing agent to promote melting of the silica proximate to surface areas of the pellet in order to seal internal portions of the pellet from the oxidizing zone and thereby reduce premature oxidation of the carbonaceous material in the pellet. Thereafter the pellets are heated to a temperature sufficient to reduce the phosphate in the pellets by reaction with the solid carbonaceous material to form elemental phosphorus vapor. Sufficient oxygen-containing gas is introduced into the kiln to cause oxidation of the elemental phosphorus vapor within the oxidation zone to produce phosphorus pentoxide.