Semequip, Inc.

Kevin Cook

Bernard Spielvogel

Richard David Goldberg

Edward K McIntyre

Dennis Manning

The invention provides new methods for synthesis of large boron hydride clusters e.g., boron hydride molecules of the formula BHwhere 5&#x2266;n&#x2266;96 and m&#x2266;n+8, wherein m and n satisfy the electron counting rules of macropolyhedral boranes. The invention is particularly useful for synthesis of octadecaborane (BH). Preferred methods of the invention include iteratively generating a conjugate acid from a salt of the [BH]or [BH]anion followed by degradation under conditions conducive to concentrating and drying of the conjugate acid to provide a borane BHand residual salt of the [BH]or [BH]anion which is reused in the method of synthesis. The invention further provides isotopically enriched boranes, particularly isotopically enrichedBHandBH.

Isotopically-enriched boranes and methods of preparing them

The invention features in-situ cleaning process for an ion source and associated extraction electrodes and similar components of the ion-beam producing system, which chemically removes carbon deposits, increasing service lifetime and performance, without the need to disassemble the system. In particular, an aspect of the invention is directed to an activating, catalytic, or reaction promoting species added to the reactive species to effectively convert the non-volatile molecular residue into a volatile species which can be removed by conventional means.

Method for extending equipment uptime in ion implantation

The invention provides new methods for the synthesis of isotopically enriched metal borohydrides, metal tetrahydroundecaborate salts, and decaborane from isotopically enrichedB-boric acid orB-boric acid. The invention is particularly useful for synthesis of isotopically enriched sodium or lithium borohydride, MBH(where M is Li, Na, K, or alkylammonium), and decaborane.

Methods of synthesis of isotopically enriched borohydride and methods of synthesis of isotopically enriched boranes

The invention provides new methods for synthesis of BH, BH, BH, and BHsalts, particularly alkylammonium salts of BH, BH, BH, and BH. More particularly, the invention provides methods of preparing tetraalkylamronium salts of BH, BH, BH, and BHby pyrolysis of tetraalkylammonium borohydrides under controlled conditions. The invention additionally provides methods of preparing, in an atom efficient process, octadecaborane from the tetraalkylammonium salts of the invention. Preferred methods of the invention are suitable for preparation of isotopically enriched boranes, particularly isotopically enrichedBHandBH.

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Hammonds Plains, Canada

Kevin Cook