Abstract: There are provided methods of treating a catalyst-containing reactor system with a liquid solvent to remove contaminants from the reactor system. An exemplary method includes the steps of: isolating the reactor system to be treated from upstream and downstream equipment; reducing the temperature and pressure of the isolated reactor system by flushing with a hydrogen rich gas; injecting a non-aqueous liquid solvent into the reactor system at an injection point while continuously flowing hydrogen-rich gas through the reactor system; maintaining the solvent in a liquid state while flowing the solvent continuously through the reactor system; and terminating the step of injecting solvent and terminating the continuous flowing of hydrogen-rich gas. The exemplary method is free of the injecting of a carrier gas into the reactor system comprising alkanes selected from the methane, ethane, propane, butane and pentane.

Abstract: There are provided methods of treating a catalyst-containing reactor system with a liquid solvent to remove contaminants from the reactor system. An exemplary method includes the steps of: isolating the reactor system to be treated from upstream and downstream equipment; reducing the temperature and pressure of the isolated reactor system by flushing with a hydrogen rich gas; injecting a non-aqueous liquid solvent into the reactor system at an injection point while continuously flowing hydrogen-rich gas through the reactor system; maintaining the solvent in a liquid state while flowing the solvent continuously through the reactor system; and terminating the step of injecting solvent and terminating the continuous flowing of hydrogen-rich gas. The exemplary method is free of the injecting of a carrier gas into the reactor system comprising alkanes selected from the methane, ethane, propane, butane and pentane.

Abstract: There are provided methods of treating a catalyst-containing reactor system with a liquid solvent to remove contaminants from the reactor system. An exemplary method includes the steps of: isolating the reactor system to be treated from upstream and downstream equipment; reducing the temperature and pressure of the isolated reactor system by flushing with a hydrogen rich gas; injecting a non-aqueous liquid solvent into the reactor system at an injection point while continuously flowing hydrogen-rich gas through the reactor system; maintaining the solvent in a liquid state while flowing the solvent continuously through the reactor system; and terminating the step of injecting solvent and terminating the continuous flowing of hydrogen-rich gas. The exemplary method is free of the injecting of a carrier gas into the reactor system comprising alkanes selected from the methane, ethane, propane, butane and pentane.

Abstract: The present invention relates to a process for removing noxious gases and cleaning hydrocarbon contaminants from equipment at a refinery, plant, or other facility during a turnaround period. The process includes injecting an aromatic solvent into the contaminated equipment with a gas stream, such as steam, and an additive. The combination of the steam and the chemical blend of solvent and additive dissolves harmful hydrocarbon material and removes noxious vapors from the equipment in a manner that is faster, more efficient, and can be performed at a significantly lower cost.

Abstract: The present invention relates to a process for removing noxious gases and cleaning hydrocarbon contaminants from equipment at a refinery, plant, or other facility during a turnaround period. The process includes injecting an aromatic solvent into the contaminated equipment with a gas stream, such as steam, and an additive. The combination of the steam and the chemical blend of solvent and additive dissolves harmful hydrocarbon material and removes noxious vapors from the equipment in a manner that is faster, more efficient, and can be performed at a significantly lower cost.

Abstract: Pyrophoric material such as iron sulfide is frequently found in refinery equipment. When the equipment is opened to the atmosphere for maintenance, an exothermic reaction may take place that can cause catastrophic damage. A process for treating pyrophoric material uses ozonated water to oxidize iron sulfide to iron oxide. The heat produced by this exothermic reaction is absorbed by the ozonated water.

Abstract: Pyrophoric material such as iron sulfide is frequently found in refinery equipment. When the equipment is opened to the atmosphere for maintenance, an exothermic reaction may take place that can cause catastrophic damage. A process according to the invention for treating pyrophoric material uses the controlled introduction of an oxygen-containing gas to safely oxidize the pyrophoric material. The oxygen-containing gas may be air.