Abstract: A method of selectively adsorbing propylene in mixtures of propylene/propane and propylene/olefins through the use of zeolites having structures with a maximum of 8-member rings of tetraheda controlling the diffusion rate. Suitable zeolite adsorbents are those having the CHA and ITE structure types. Other 8-member ring zeolites, including aluminosilicates, with a Si:Al molar ratio of at least about 200 and having substantially no free acid are also suitable adsorbents.
Type:
Grant
Filed:
April 27, 2001
Date of Patent:
December 3, 2002
Assignee:
The Trustess of the University of Pennsylvania
Abstract: A method of adding a medicament (or other added ingredient) to animal feed pellets is described, in which the medicament is contained in a cohesive gel which is mixed with the feed pellets. The gel coats the pellets substantially homogeneously, and leaves little contamination of the mixing vessel. Preferably, the gel has a viscosity in the range 5,000 to 20,000 cP, and is added to the feed pellets in an amount of between 2 and 40 kg/tonne.
Abstract: Gas is produced in situ from an underground formation of carbonaceous material by passing a controlled direct electrical current through the formation.
Type:
Grant
Filed:
March 10, 1981
Date of Patent:
May 10, 1983
Assignee:
Electro-Petroleum, Inc.
Inventors:
Christy W. Bell, Charles H. Titus, John K. Wittle