Assertion: calcium hydride | /r/AtLocation | amount
Facets:
value: in the production of titanium hydride
type: OTHER
value: at a temperature
type: TEMPORAL
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 an absorbing layer of titanium dioxide pigment on -top of the charge, gradually heating the charge to a temperature suiciently high gradually to dissociate the `alkaline earth metal hydride into calcium and hydrogen gasto 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 sufficient to yield on dissociation reducing calcium metal in excess of the amount required to effect reduction of the titanium dioxide, evacuating the reaction zone while at a temperature sufliciently high to dissociate the excess calcium hydride to remove hydrogen gas and gaseous products of reaction therefrom and to distill and pass theexcess calcium thus released from the underlying charge into the overlying layer of titanium dioxide pigment, in-
text: VIn the production of titanium hydride, the improvement which comprises placing a charge of titanium dioxide pigment and calcium hydride with i a in a reaction zone, placing an absorbing layer of hydride is heated to a temperature sufficientlytitanium dioxide pigment on top of the charge, evacuating the reaction zone to remove air and moisture, illling the reaction zone with an inert gas, maintaining the reaction zone under substantial positive pressure with said inert gas, gradually heating the charge to a temperature sumciently high gradually to dissociate the alkaline earth metal 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 sufllcient to yield on dissociation reducing calcium metal in excess of the amount required to effect 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, the inert gas and gaseous products 'of reaction therefrom and to dstill and pass the excess calcium thus released from the underlying charge into the overlying layer of titanium dioxide pigment, introducing hydrogen gas into the heated reaction zone in amount sufficient 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.
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 sufficiently 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 sufficient to yield on dissociation reducing calcium metal in excess of the amount required to effect reduction of the titanium dioxide, evacuating the reaction zone while at a temperature sufficiently high to dissociate the excess calcium hydride to remove hydrogen gas and gaseous products of reaction therefrom and to distill and 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 sufficient 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 o0 hydride by leaching the charge with a solvent for the calcium oxide.
text: In the production of titanium hydride, the improvement which comprises placing a charge of titanium dioxide pigment and calcium hydride in I5 a reaction zone, placing an absorbing layer of metal oxide on top of the charge, gradually heating the charge to a temperature sufficiently high gradually to dissociate the calcium hydride into calcium and hydrogen gas to reduce the titanium '0 dioxide in the charge with the calcium thus released to form metallic titanium and calcium oxide, the calcium hydride being present in amount sufficient to yield on dissociation reducing calcium metal in excess of the amount required to 5 effect reduction of the titanium dioxide, evacuating.the reaction zone while at a temperature sufficiently high to dissociate the excess calcium hydride to remove hydrogen gas and gaseous products of reaction therefrom and to distill and pass the excess calcium thus released from the underlying charge into the overlying layer of metal oxide, introducing hydrogen gas into the heated reaction zone in amount sufficient 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.
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 an absorbing layer of titanium dioxide pigment on top of the charge, gradually heating the charge to a temperature sufficiently high gradually to dissociate the alkaline earth metal 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 sufficient to yield on dissociation reducing calcium metal in excess of the amount required to effect reduction of the titanium dioxide, evacuating the reaction zone while at a temperature sufficiently high to dissociate the excess calcium hydride to remove hydrogen gas and gaseous products of reaction therefrom and to distill and pass the excess calcium thus released from the underlying charge into the overlying layer of titanium dioxide pigment, introducing hydrogen gas into the heated reaction zone in amount sufficient 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.
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 an absorbing layer of titanium dioxide pigment on top of the charge, evacuating the reduction zone to remove air and moisture, gradually heating the charge to a temperature sufficiently high gradually to dissociate the alkaline earth metal hydride into calcium and hydrogen gas to reduce the titanium dioxide in 5 the charge with the calcium thus released to form metallic titanium and calcium oxide, the calcium hydride being present in amount sufficient to yield on dissociation reducing calcium metal in excess of the amount required to effect 6f reduction of the titanium dioxide, evacuating the reaction zone while at a temperature sufficiently high to dissociate the excess calcium hydride to remove hydrogen gas and gaseous products of reaction therefrom and to distill and pass the ex- 6 cess calcium thus released from the underlying charge into the overlying layer of titanium dioxide pigment, introducing hydrogen gas into the heated reaction zone in amount sufficient to con- 7 vert 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 7 titanium hydride by leaching the charge with a solvent for the calcium oxide.
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 an absorbing layer of titanium dioxide pigment on top of the charge, evacuating the reaction zone to remove air and moisture, filling the reaction zone with an inert gas, maintaining the reaction zone under substantial positive pressure with said inert gas, gradually heating the charge to a temperature sufficiently high gradually to dissociate the alkaline earth metal 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 sufficient to yield on dissociation reducing calcium metal in excess of the amount required to effect reduction of the titanium dioxide, evacuating the reaction zone while at a temperature sufficiently high to dissociate the excess calcium hydride to remove hydrogen gas, the inert gas and gaseous products of reaction therefrom and to distill and pass the excess calcium thus released from the underlying charge into the overlying layer of titanium dioxide pigment, introducing hydrogen gas into the heated reaction zone in amount sufficient 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.