Prestone Products Corporation

First Brands Corporation

Stephen M Woodward

Peter M Woyciesjes

Aleksei V Gershun

Richard F Creeron

Norman D Berke

Robert J Rosvally

A recycling apparatus which preferably treats used antifreeze/coolant in four cycles is disclosed. The recycling apparatus includes a number of tanks for storing the antifreeze/coolant during the various treatment cycles, a number of containers for storing chemical reagents used to chemically treat the antifreeze/coolant and a number of filters used to capture impurities suspended in the treated antifreeze/coolant. During a fill cycle, the used antifreeze/coolant is introduced into a treatment tank and the concentration of the antifreeze/coolant is adjusted, if necessary, to a predefined range. During a mix cycle, the used antifreeze/coolant is mixed with various reagents to adjust the pH value, as well as to coagulate and flocculate the impurities. A reverse mixing and aspiration of the antifreeze/coolant in the tank during the mix cycle ensure that the reagents will mix well and react with the impurities in the used antifreeze/coolant to form a sludge. During a dormant cycle, the fluid in the tank is allowed to set, while the sludge is caused to rise to the top of the fluid. Finally, during a drain and filter cycle, the treated antifreeze/coolant is vacuum-drained from the treatment tank and is filtered and reinhibited before being stored in a storage tank. The treatment tank is preferably conically-shaped with a double step in its apex to assist the removal of sludge during the vacuum evacuation procedure.

Methods and apparatus for recycling used antifreeze/coolant

A change-over apparatus for use in conjunction with a cooling system of an internal combustion engine having an engine and radiator and having an upper hose between the radiator and the engine which has been cut to form an upper radiator hose section and an upper engine hose section wherein a change-over apparatus comprising at least one tubular body having first and second tube bodies having end openings, with the end opening for connection to said upper radiator hose section, said second end opening for connection to said upper engine hose section, a liquid ingress opening spaced from said first end opening, a liquid egress opening spaced from said second end opening, and, optionally, a flow regulating means placed between said liquid ingress opening and said liquid egress opening.

Cooling system change-over apparatus and process

Cooling system change over apparatus and process

The process relates to the treatment of aqueous solutions of polyhydric alcohols to remove heavy metal components, oils, organic contaminants and, optionally, water. The process is particularly well suited for use in the treatment of spent antifreeze/coolant from the cooling systems of internal combustion engines.

Process for treatment of aqueous solutions of polyhydric alcohols

The process relates to the reinhibition of recycled antifreeze/coolant. The process is particularly well suited for use with recycled, used antifreeze/coolant from the cooling systems of internal combustion engines.

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Lakeside, CT, United States of America

Stephen M Woodward