E.i. Dupont De Nemours and Company

Robert D Shannon

George C Sonnichsen

David Richard Corbin

Thurman E Gier

Lloyd Abrams

Peter Francis Carcia

Barry Edward Taylor

Yung-Haw Hu

Michael Keane, Jr

Dimitri N Staikos

Michael A Saltzberg

A low-K crystallizable glass composition having a softening point of 550.degree.-800.degree. C., consisting essentially of mole % of:

Metaphosphate glass composition

Improved acidic zeolite rho and ZK-5 catalysts for conversion of methanol and ammonia to dimethylamine are disclosed. The acidic zeolite rho catalyst is prepared by calcining zeolite NH.sub.4 -rho or H-rho in the presence of steam. The acidic zeolite ZK-5 catalyst is prepared by calcining zeolite NH.sub.4 -ZK-5 or H-ZK-5 in the presence of steam. An acidic zeolite rho which has been prepared by calcining zeolite NH.sub.4 -rho in a vertical furnace in the presence of ammonia is disclosed. Processes for producing dimethylamine with the specified catalysts are also disclosed.

Zeolite rho and ZK-5 catalysts for conversion of methanol and ammonia to

A process is provided for producing dimethylamine, comprising reacting methanol and/or dimethylether and ammonia, in amounts sufficient to provide a carbon/nitrogen (C/N) ratio of from about 0.2 to about 1.5, at a temperature from about 250.degree. C. to about 450.degree. C., in the presence of a catalytic amount of an acidic zeolite rho.

Zeolite Rho as catalyst for conversion of methanol and ammonia to

A process is provided for producing dimethylamine, comprising reacting methanol and/or dimethylether and ammonia in amounts sufficient to provide a carbon/nitrogen (C/N) ratio from about 0.2 to about 1.5, at a temperature from about 250.degree. C. to about 450.degree. C., in the presence of a catalytic amount of an acidic zeolite catalyst selected from the group consisting of natural, H-exchanged, and M-exchanged chabazites, each having a geometric selectivity index greater than about 3, wherein M is one or more alkali metal ions selected from the group consisting of Na, K, Rb, and Cs.

Selected chabazite zeolites as catalysts for conversion of methanol and

A process is provided for producing dimethylamine comprising reacting methanol and/or dimethylether and ammonia in amounts sufficient to provide a carbon/nitrogen (C/N) ratio from about 0.2 to about 1.5, at a temperature from about 250.degree. C. to about 450.degree. C., in the presence of a catalytic amount of an acidic H-ZK-5 zeolite catalyst.

Zeolite H-ZK-5 as catalyst for conversion of methanol and ammonia to

Electrode comprised of the electrocatalyst of the prototype formula Pt.sub.3 MO.sub.6 wherein M is Mn, Fe, Co, Ni, Zn, Mg, Ca, Cu, Cd or Hg.

Oxygen electrode of the type Pt.sub.3 MO.sub.6

Bismuth oxyhalide solid solution having the PbFC1 structure and of the formula BiOI.sub.1-x-y Br.sub.x Cl.sub.y wherein x is 0 to about 0.8, y is 0 to about 0.3 and x+y is about 0.1 to about 0.8.

Bismuth oxyhalide solid solution

Sodium ion conducting compositions are provided having (a) the formula Na.sub.5-x .quadrature..sub.x Gd.sub.1-y-x M.sub.y M'.sub.x Si.sub.4-z Ge.sub.z O.sub.12 wherein

Na.sub.5 GdSi.sub.4 O .sub.12 and related rare earth sodium ion

Substituted lithium orthosilicates are provided having

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Chadds Ford, PA, United States of America

Robert D Shannon