Abstract: A silica-based material comprising: silicon; aluminum; at least one fourth period element selected from the group consisting of iron, cobalt, nickel and zinc; and at least one basic element selected from the group consisting of alkali metal elements, alkali earth metal elements and rare earth elements, wherein the silica-based material comprises 42 to 90 mol % of the silicon, 3 to 38 mol % of the aluminum, 0.5 to 20 mol % of the fourth period element and 2 to 38 mol % of the basic element, based on a total mole of the silicon, the aluminum, the fourth period element and the basic element.

Abstract: A method of forming urea by integration of an ammonia production process with that of a urea production process, as well as a system for the method is disclosed. Also, an alternative method of forming urea by integration of a part of an ammonia production process with that of a urea production process, as well as a system for the alternative method.

Abstract: Optically active phosphines of the general formula I or II ##STR1## where the variables have the following meanings: X is an optically active terpene radical,R is an unsubstituted or substituted phenyl radical,Y is a bridge member having 1-10 C atoms in the formula In is 1,2 or 3 andm is 0,1 or 2 with the proviso that n+m=3 in the formula IIn is 1 or 2 andm is 0 or 1 with the proviso that n+m=2, their preparation and use are described.

Abstract: Ti(III) coordination complexes with ethers are prepared by the steps of (a) forming an ether complex of a Ti(IV) salt by adding a stoichiometric excess of an ether to said salt, and then (b) reducing said complex with an organometallic reducing agent such as an aluminum alkyl or a lithium compound to form a Ti(III)-ether coordination complex.