Method for cleaning pressurized containers containing moisture sensitive chemicals
US6793740B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 9, 2001 |
| Grant date | Sep 21, 2004 |
| Priority date | — |
| Expiry date | Dec 31, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF17C2270/0173
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention relates to a method for cleaning a pressurized container having at least one chemical contained therein. The pressurized container may be any type of container able to store chemicals under pressure. Preferably, however, the container is a rail tank car. Generally, the method includes: a step of injecting the container with an input gas to create a chemical/input gas mixture; a step of removing the chemical/input gas mixture via a vacuum pump; and a step of injecting the chemical/input gas mixture into a reaction tank to neutralize the chemical. The input gas may be heated nitrogen gas or heated, dry air. The reaction tank may contain a caustic material for reacting with the chemical.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.