Abstract: Temperature is controlled in a hydrogenation reactor without changing the flow rate of feed into the reactor to maintain a pre-determined temperature in the reactor. In one embodiment, the firing rate of a fuel fired furnace for heating feed to the reactor is controlled in response to the temperature sensed in the reactor to maintain a pre-determined temperature. In another embodiment, the flow rate of a quenching stream for cooling feed to the reactor is controlled in response to temperature sensed in the reactor to maintain a pre-determined temperature in the reactor.

Abstract: In an expanded bed reactor, the expansion of the bed is automatically controlled by automatically changing the rate of speed of a recycle pump for the reactor. The bed is preferably provided with both high and low level bed detectors, and a further detector for determining abnormally high levels.

Abstract: A process is described for eliminating or substantially reducing the surface tack on relief printing plates and the like articles fabricated from radiation-sensitive polymerizable resins, particularly photopolymerizable resin compositions. The process comprises immersing the article, after curing, in an aqueous solution or dispersion comprising a water-soluble or water dispersible ethylenically unsaturated monomer (acrylic, methacrylic acids and derivatives thereof preferred) and optionally a photoinitiator and exposing the immersed plate to actinic radiation.

Abstract: A variable air volume air conditioning system is disclosed which is capable of accurately controlling temperature and humidity levels in a conditional zone while achieving significant economy of operation.

Abstract: An alloy of copper, aluminum, nickel and indium is found useful in the fabrication of jewelry and dental appliances. The alloy resists tarnishing and has a gold-like appearance.

Abstract: A gravity settler comprised of a housing which encloses a plurality of conically shaped hollow members arranged in vertically spaced horizontally disposed layers, each of such layers containing a plurality of the conical members, with adjacent layers defining therebetween separate gravity settling compartments. Each of the compartments includes a feed inlet(s), overflow outlets for withdrawing clarified liquid and underflow outlets for withdrawing liquid containing solid.

Abstract: A gravity settler comprised of a housing which encloses a plurality of conically shaped hollow members arranged in vertically spaced horizontally disposed layers, each of such layers containing a plurality of the conical members, with adjacent layers defining therebetween separate gravity settling compartments. Each of the compartments includes a feed inlet(s), overflow outlets for withdrawing clarified liquid and underflow outlets for withdrawing liquid containing solid.

Abstract: Ethylenically unsaturated monomeric esters in the presence of keto-dioxolane compounds are photocured upon exposure to a source of radiation.

Abstract: Ethylenically unsaturated monomeric esters in the presence of keto-dioxolane compounds are polymerized upon exposure to a source of radiation.