Proprietary Technologies & Patent Portfolio.
Innovation is one of RAPCO’s core competitive strengths. Through continuous research and development, the company is creating proprietary technologies that address critical challenges in bulk material handling, pneumatic conveying, and process optimization for the petrochemical and polymer industries.
Our patent portfolio reflects RAPCO’s commitment to developing practical, industrially deployable technologies that improve process efficiency, operational reliability, energy performance, and environmental sustainability.
Process for Nitrogen Separation from the Nitrogen Return Line in Closed-Circuit Pneumatic Conveying Systems of High-Density Polyethylene Powders
A continuous process for separating nitrogen from a contaminated nitrogen mixture in a closed-loop pneumatic conveying system for transporting high-density polyethylene (HDPE) powder is developed. The process comprises introducing a contaminated nitrogen mixture into a filtration unit to remove at least 95% by weight of entrained particles, cooling the filtered gas stream in a first shell-and-tube heat exchanger using a flow control valve and a temperature sensor collectively configured to maintain an outlet temperature of 25°C to 35°C to condense at least 90% by weight of condensable components, producing a two-phase mixture, separating the nitrogen-rich gaseous phase from the liquid phase in an expansion-type separation drum, monitoring the oxygen concentration to maintain it below 5% by volume using an oxygen analyzer transmitter, pressurizing the separated gas stream using at least one blower to produce a reusable nitrogen stream, cooling the reusable nitrogen stream in a second shell-and-tube heat exchanger, and reintroducing the cooled reusable nitrogen stream into the conveying system via a rotary valve.
Pilot-Scale Two-Phase Gas-Solid Conveying Test System with Pressure and Flow Control for Evaluating Various Materials Under Dense-Phase and Dilute-Phase Conditions
A system configured to conduct a two-phase gas-solid conveying test under controlled pressure and flow conditions, the system comprising a gas pressure supply unit comprising at least one gas pressurizing device configured to receive and pressurize a gas stream and deliver the pressurized gas stream to a gas inlet line; a cooling unit disposed at a downstream of the gas pressure supply unit and connected in fluid communication therewith, the cooling unit configured to regulate a temperature of the pressurized gas stream; a gas flow control unit disposed at a downstream of the cooling unit and connected in fluid communication therewith, the gas flow control unit configured to regulate either a flow rate and a velocity of the pressurized gas stream through the gas inlet line, the gas flow control unit comprising at least one flow measuring device and at least one flow regulating valve; a two-phase transport unit disposed at a downstream of the gas flow control unit and connected in fluid communication therewith, the two-phase transport unit comprising a two-phase transport line configured to convey a two-phase gas-solid flow and at least one pressure monitoring device disposed along the two-phase transport line and configured to monitor pressure drop during the two-phase gas-solid conveying test; a solid-phase feeding unit mechanically coupled and fluidly connected to the two-phase transport line, the solid-phase feeding unit configured to deliver a plurality of solid particles into the two-phase transport line to form the two-phase gas-solid flow; and a product collection and separation disposed at a downstream of the two-phase transport unit and connected in fluid communication therewith, the PCS unit configured to receive the two-phase gas-solid flow, separate a solid phase from a gas phase, and discharge the gas phase to an atmospheric outlet.
Innovation in Action
See how RAPCO's internationally patented (PCT) technologies are transforming pneumatic conveying systems — from lab-scale testing to full industrial deployment.
Driving Innovation Through Proprietary Engineering
These patent applications demonstrate RAPCO’s commitment to developing proprietary technologies that solve real industrial challenges rather than incremental improvements alone. By combining applied research, pilot-scale validation, advanced engineering, and practical industrial experience, RAPCO continues to expand its intellectual property portfolio while delivering innovative solutions that improve efficiency, reliability, sustainability, and operational performance across the petrochemical, chemical, and polymer industries.