Process and apparatus for recovering hydrocarbons from air-hydrocarbon vapor mixtures

Patent · Tue Jun 30 00:00:00 EDT 1981

OSTI ID:6155763

Dinsmore, H L

An improved process and apparatus are claimed for recovering hydrocarbons from an air-hydrocarbon vapor mixture such as the mixture of air and vaporized light hydrocarbon compounds expelled as a result of loading gasoline or the like into storage tanks and tank trucks. The air-hydrocarbon vapor mixture is caused to flow through a bed of solid adsorbent so that the hydrocarbons are removed from the mixture and a residue gas stream comprised of substantially hydrocarbon-free air is produced. The substantially hydrocarbon free air is vented to the atmosphere and a second bed of solid adsorbent having hydrocarbons adsorbed thereon is subjected to conditions which cause desorption of the hydrocarbons and thereby regeneration of the bed. The flow pattern of the inlet air-hydrocarbon vapor mixture and the bed of solid adsorbent being regenerated are periodically changed so that when the bed through which the inlet air-hydrocarbon mixture is flowing becomes loaded with adsorbed hydrocarbons, the inlet air-hydrocarbon mixture is caused to flow through the bed which has just been regenerated. The regeneration of the beds is accomplished by evacuating the beds with vacuum pumping so that a major portion of the hydrocarbons are desorbed therefrom and subsequently introducing a small quantity of heated hydrocarbon-free air into the beds so that additional hydrocarbons are stripped therefrom. The airhydrocarbon vapor mixture produced in the regeneration of the beds is contacted with a heated first portion and a second portion of a liquid absorbent so that a major portion of the hydrocarbons are absorbed therefrom and recovered. The first portion is heated by passing it in heat exchange relationship with a seal liquid used in a vacuum pump which effects the vacuum pumping of the adsorbent beds. Apparatus for carrying out the process of the invention is also described.

• Assignee: Zink, John Co
• Patent Number(s): US 4276058
• OSTI ID: 6155763
• Resource Relation: Patent File Date: Filed date 26 Aug 1980
• Country of Publication: United States
• Language: English

Related Subjects

10 SYNTHETIC FUELS
HYDROCARBONS
SEPARATION PROCESSES
VAPOR SEPARATORS
DESIGN
ADSORBENTS
AIR
AIR POLLUTION CONTROL
EQUIPMENT
GASOLINE
HEAT EXCHANGERS
MATERIALS RECOVERY
MIXTURES
REGENERATION
VACUUM PUMPS
VAPORS
CONTROL
DISPERSIONS
FLUIDS
FUELS
GASES
LABORATORY EQUIPMENT
LIQUID FUELS
MANAGEMENT
ORGANIC COMPOUNDS
PETROLEUM PRODUCTS
POLLUTION CONTROL
PROCESSING
PUMPS
RECOVERY
SEPARATION EQUIPMENT
WASTE MANAGEMENT
WASTE PROCESSING
090100* - Hydrocarbon Fuels- (-1989)