Patent ID: 7661871

Claim:
An apparatus to store, mix, meter and pump a slurry chemical material comprising: a storage vessel, the storage vessel being substantially a vertical vessel having a predetermined shape for receiving and storing the slurry chemical material; a vapor recirculation system, the vapor recirculation system cooperates with the storage vessel to collect vapors that evaporate from the slurry chemical materials and injects the vapors into a means for mixing, where the means for mixing being received inside the storage vessel such that the storage vessel, the recirculation system and the means for mixing cooperate to cause the vapors to be absorbed back into the slurry chemical materials; a liquid recirculation system; a means for metering and pumping chemical material; the liquid recirculation system cooperates with the storage vessel and the means for metering and pumping chemical material to circulate slurry chemical materials from the bottom of the storage vessel to the top of the storage vessel and to the inlet of the means for metering and pumping chemical at a predetermined flow rate and predetermined pressure such that the slurry chemical materials are maintained in a semi-liquid state and such that the slurry chemical materials can be received into the means for metering and pumping chemical material to allow a measured amount of slurry chemical material to be pumped by the apparatus; and a means for controlling apparatus, the means for controlling apparatus cooperates with the vapor recirculation system, the liquid recirculation system and the means for metering and pumping chemical material to provide predetermined logic that directs and monitors the vapor recirculation system, the liquid recirculation system and the means for metering and pumping chemical material such that combination provides for the storing, mixing, metering and pumping of the slurry chemical material.