Method for generating vacuum in mass-exchange columns
US6267848A · kind A · utility
Assignees
Inventor
Key dates
| Filing date | Aug 16, 1999 |
| Grant date | Jul 31, 2001 |
| Priority date | — |
| Expiry date | Aug 16, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S203/11
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention pertains to the field of chemical and oil refining technology. In particular, the invention relates to the vacuum distillation of liquid mixtures and relates directly to the separation of liquid mixtures. The main field of application of the invention is rectification of oil stock in the petrochemical industry. The objective of this invention is to reduce power consumption required for generating a vacuum in mass-transfer columns while improving the quality of target products, reducing environmental pollution and increasing the efficiency of separation. According to the invention, a vacuum in a mass transfer column is generated due to condensation of outgoing vapors and evacuation of non-condensable gas-vapors by a vacuum-producing system, which is connected to a vacuum pump and composed of an absorber, a phase separator and a cooler, connected in series. A liquid phase (or mixture of phases) with the lowest possible solidification temperature is used as an absorbent for condensation of the gas-vapors and for producing a vacuum. This liquid phase (or mixture of phases) is pre-separated in the phase separator and is cooled after separation down to a temperature…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.