摘要:
Catalytic cracking catalysts and additives which comprise a rare earth binder component are especially useful for catalytic cracking processes involving hydrocarbon feedstocks containing high metals content. The catalysts and additives may be used in conjunction with zeolite-containing cracking catalysts to enhance catalytic activity/selectivity especially for vanadium-containing hydrocarbon feedstocks. The rare earth binder component is preferably derived from a rare earth acid sol.
摘要:
A method of preparing a package having a product (18) enclosed between a support member (20) and a multiple-film lid (22), comprising the steps of providing a support member supporting a product; providing a multiple-film lid over the product and the support member, the multiple-film lid having a first film (26) for enclosing the product on the support member when sealed thereto and a second film (28) over the first film, the first film and the second film defining a first space therebetween and the first film and the support member defining a second space therebetween: evacuating the first and second spaces; and sealing the multiple-film lid to the support member so as to form a sealed package.
摘要:
A multicellular monolith converter body having a plurality of corrugated thin metal sheets or strips in alternating relation with a thin wire mesh or frame, and which monolith has a cell density up to 100 cells per square inch. These monoliths are useful under conditions where back-pressure is a critical factor, e.g., natural draft exhaust applications. These devices may have corrugated thin metal sheets coated with a refractory metal oxide, e.g., alumina, with or without a noble metal catalyst.
摘要:
The instant invention is directed to a laminate (18) comprising a core layer (24) comprising an oxygen barrier polymer, a heat sealable layer (28) comprising a homogeneous ethylene alpha-olefin copolymer, an outer abuse-resistant polymeric layer (20); and an intermediate layer (22, 26) disposed between the core layer and each of the heat sealable layer and the outer layer, and comprising a polymeric adhesive. In another aspect of the present invention, a package comprises a food product, a pouch containing the food product, the pouch having a longitudinal seal, and the pouch constructed from a laminate comprising a core layer comprising an oxygen barrier polymer, a heat sealable layer comprising a homogeneous ethylene alpha-olefin copolymer, an outer abuse-resistant polymeric layer, and an intermediate layer disposed between the core layer and each of the heat sealable layer, and the outer layer, and comprising a polymeric adhesive.
摘要:
Raw gas burner (1) that maximizes fuel efficiency of the burner, minimizes residence time and reduces or eliminates flame contact with the process air or gas in order to minimize NOx formation. Process air flow, such as from the cold side of a heat exchanger associated with thermal oxidizer apparatus (100), is directed into and around the burner. The amount of process air flowing into the burner is regulated based upon the pressure drop created by the burner assembly. The pressure drop is, in turn, regulated by one or more of an external damper assembly, an internal damper assembly, and movement of the burner relative to the apparatus in which it is mounted. To ensure thorough mixing of the fuel and process air, process air entering the burner is caused to spin by the use of a swirl generator (10). The fuel/process air mixture proceeds into the combustion section (50) of the burner, where the swirling flow is caused to recirculate to ensure complete combustion of the fuel in the combustion chamber. The mixture of burned fuel and process gas transfers its energy flamelessly to the process gas circulating outside the burner combustion chamber, and is hot enough to ignite the process gas there, which then burns separately from the burner combustion chamber, such as in the main combustion enclosure (114) of the thermal post-combustion device.
摘要:
A method of detecting the permeability of an article to oxygen is disclosed. A fluorescent redox indicator, preferably riboflavin, is dispersed in a carrier and placed on an impermeable substrate. The article to be measured is placed adjacent to the carrier. Residual oxygen is removed, the redox indicator is photoreduced, the article and carrier are exposed to oxygen, and the indicator is exposed to UV light.
摘要:
Compositions comprising a component containing (i) an acidic oxide support, (ii) an alkali metal and/or alkaline earth metal or mixtures thereof, (iii) a transition metal oxide having oxygen storage capability, and (iv) a transition metal selected from Groups Ib and/or IIb of the Periodic Table or palladium are useful in FCC processes to reduce NO x emissions and/or to promote CO combustion while minimizing the formation of NO x . The acidic oxide support preferably contains silica alumina. Ceria is the preferred oxygen storage oxide.