Assertion: calcium hydride | /r/AtLocation | amount suflicient
Facets:
value: in the production of titanium hydride
type: OTHER
Source sentences:
text: In the production of titanium hydride, the improvement which comprises placing a, charge of titanium dioxide pigment and calcium hydride in a reaction zone, placing'a layer of absorbing material on top of the charge, gradually heating the charge to a temperature sufliciently high gradually to dissociate the calcium hydride into calcium and hydrogen gas to reduce the titanium dioxide in the charge with the calcium thus released to form metallic titanium and calcium oxide, the calcium hydride being present in amount suflicient to yield on dissociation reducing calcium metal in excess of the amount required to eiect reduction of the titanium dioxide, evacuating the reaction zone while at a temperature suiliciently high to dissociate the excess calcium hydride to remove hydrogen gas and gaseous products of reaction therefrom and to distilland pass the excess calcium thus released from the underlying charge into the overlying layer of absorbing material, introducing hydrogen gas into the heated reaction zone in 'amount suliicient to convert the reduced titanium to titanium hydride, cooling the resulting charge containing the titanium hydride and the calcium oxide, separating the overlying layer of absorbing material from the underlying charge, and separately recovering the titanium hydride by leaching the charge with a solvent for the calcium oxide.