Abstract:
Tanks for mixing apparatus are described in which one or more chemical materials are to be incorporated in a carrier liquid, which may be a solvent, such as water, and which is quantitatively predominant, some of the chemical materials being incompatible if brought together directly, or in a wrong sequence, or which are difficult to combine, the materials preferably being combined in the desired proportions in a cascaded arrangement of liquid filled chambers, the respective materials in the desired proportions preferably being supplied from separate sources of materials by pumps, the delivery of the carrier liquid being to a first mixing chamber in the tank to which a first chemical material is supplied, additional and successive mixing chambers being provided, if desired, the tanks being constructed of synthetic plastic material molded to provide a body to receive partition walls for attachment to the body, and a cover preferably transparent and molded to receive the partition walls, the cover preferably having fluid connections thereon for fluid and chemical material supply, for agitation of the liquid in the chambers for mixing for delivery of the mixed materials for use. Improved methods of making the tanks are also disclosed.
Abstract:
The necessity of opening a large polymerization reactor, in order to introduce a polymerization catalyst between charges in the batch suspension of polymerization of vinyl chloride on a commercial scale, is eliminated, thereby avoiding vinyl chloride emissions into the atmosphere, by isolating a segment of a charging conduit for a polymerization reactor containing vinyl chloride under pressure proximate the reactor; partially filling the isolated segment with water; charging the isolated segment above the water therein with a water-insoluble polymerization catalyst; and displacing into the reactor from the catalyst-charged segment first the water therein and then the catalyst therein with vinyl chloride under pressure.
Abstract:
Apparatus for the continuous feeding of plural liquids in separate streams of adjustable quantity and ratio, comprises a drive unit that drives a main pump, and that also drives at least one secondary pump. The drive unit has an oscillating or reciprocating movement, and so the pumps are piston pumps or oscillating vane-type pumps. The stroke of the secondary pump or pumps may be selectively shortened without shortening that of the main pump, so as to predetermine the proportions of the liquids to each other. The system is particularly applicable for the feeding of separate streams of synthetic resins by the main pump, and the associated hardeners, catalysts, accelerators or other auxiliary liquids by the secondary pump or pumps.
Abstract:
A device for injecting adjuvant into a liquid employing a stepped piston in a stepped cylinder with a valve in the piston triggered to open and close at opposite ends of the piston travel to cause a reversal of piston movement while a further piston integral with the first mentioned piston operates to pump metered quantities of adjuvant into the stepped cylinder.
Abstract:
Apparatus for introducing an additive into a stream of liquid comprises a pipeline which conveys the liquid at a variable rate of flow, a flowmeter whose chamber communicates with the pipeline and accommodates a rotor rotated by liquid in the pipeline at a speed which is a function of the rate of liquid flow to thereby produce signals at a frequency which is indicative of such speed, and a pump which discharges into the chamber a unit quantity of additive in response to each signal whereby the additive is mixed with liquid in the chamber before it enters the main stream of liquid in the pipeline.