E.i. Dupont De Nemours and Company

Other

Eugene Michael McCarron

Norman Herron

Kostantinos Kourtakis

Leo E Manzer

Mark Andrew Harmer

Peter Francis Carcia

Patricia A Morris

Harold S Horowitz

Paul D VerNooy

Paul D Ver Nooy

Sujata Jagota

The present invention relates to a process for the preparation of para-xylene from trimethylpentane.

Process for the preparation of p-xylene

An infrared thermographic technique for rapid parallel screening of compositional arrays of potential chemical sensor materials has been developed. The technique involves applying a voltage bias and the associated current to the sample array during screening. The thermographic response is amplified by the resistance change that occurs with gas adsorption, and is directly monitored as the temperature change associated with I R heating. This technique can also be used to determine n- or p-type character for the semiconductor in question.

Infrared thermographic screening technique for semiconductor-based chemical sensors

Mullite-containing coatings for inorganic fibers and ceramic matrix

Vanadyl pyrophosphate oxidation catalyst precursors comprise vanadium phosphate esters of the formula

Vanadyl pyrophosphate oxidation catalyst precursors

There is disclosed an improved process for preparing a superconducting composition having the formula MBa.sub.2 Cu.sub.3 O.sub.x wherein M is selected from the group consisiting of Y, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb and Lu; x is from about 6.5 to about 7.0; said composition having a superconducting transition temperature of about 90 K.; said process consisiting essentially of mixing ba(NO.sub.3).sub.2, M.sub.2 O.sub.3 and CuO in an atomic ratio of M:Ba:Cu of about 1:2:3 to form a precursor powder and heating the precursor powder in an oxygen-containing atmoshpere at a temperature from about 875.degree. C. to about 950.degree. C. for a time sufficient to form MBa.sub.2 Cu.sub.3 O.sub.y, where y is from about 6.0 to about 6.4; and maintaining the Mba.sub.2 Cu.sub.3 O.sub.y in an oxygen-containing atmosphere while cooling for a time sufficient to obtain the desired product.

Process for making superconductors using barium nitrate

A novel phase of molybdenum trioxide and mixed metal oxides of molybdenum and tungsten is disclosed.

Growing community of inventors

Greenville, DE, United States of America

Eugene Michael McCarron