Patents by Inventor Gerhard Linde

Gerhard Linde has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4836988
    Abstract: Apparatus for removal of deleterious gaseous components from a flue gas, the flue gas is cooled, optionally subjected to preliminary purification, and optionally depleted of SO.sub.2. It is then heated in at least one heat exchanger and is passed over a catalyst suitable for the conversion of nitrogen oxides, whereupon the purified hot flue gas is conducted over at least one further heat exchanger and is discharged in the cooled state. Ammonia is preferably added to the heated flue gas.
    Type: Grant
    Filed: June 2, 1987
    Date of Patent: June 6, 1989
    Assignee: Linde Aktiengesellschaft
    Inventors: Wolfgang Kristof, Claus Schlebener, Gerhard Linde
  • Patent number: 4795620
    Abstract: A process is disclosed for the purification of a gaseous stream contaminated at least with CO.sub.2 and H.sub.2 S. The gaseous stream is preheated and subjected, in the presence of recycled SO.sub.2, to a catalytic conversion of H.sub.2 S into elemental sulfur. The thus-obtained sulfur is separated, and the residual gas, which contains at least H.sub.2 S, SO.sub.2, CO.sub.2, and water, is freed absorptively from SO.sub.2 after oxidative conversion of H.sub.2 S to SO.sub.2. It is proposed that the residual gas, after oxidative conversion of H.sub.2 S to SO.sub.2, is cooled in heat exchangers, preferably regenerators, and is subsequently scrubbed with a solvent consisting predominantly of tetraethylene glycol dimethyl ether.
    Type: Grant
    Filed: February 27, 1987
    Date of Patent: January 3, 1989
    Assignee: Linde Akitengesellschaft
    Inventors: Michael Heisel, Gerhard Linde
  • Patent number: 4725416
    Abstract: For the removal of deleterious gaseous components from a flue gas, the flue gas is cooled, optionally subjected to preliminary purification, and optionally depleted of SO.sub.2. It is then heated in at least one heat exchanger and is passed over a catalyst suitable for the conversion of nitrogen oxide, whereupon the purified hot flue gas is conducted over at least one further heat exchanger and is discharged in the cooled state. Ammonia is preferably added to the heated flue gas.
    Type: Grant
    Filed: April 5, 1985
    Date of Patent: February 16, 1988
    Assignee: Linde Aktiengesellschaft
    Inventors: Wolfgang Kristof, Claus Schlebener, Gerhard Linde
  • Patent number: 4695349
    Abstract: A process is disclosed for distillation and/or stripping in a column, the lower portion of which is heated and the upper portion of which is cooled. The heating and cooling facilities thereof are coupled with each other by means of a heat pump system. In order to reduce the energy input, the invention provides for driving the heat pump system by means of expansion of a gas or vapor, and with the gas or vapor, after expansion, utilized as the stripping gas in the column.
    Type: Grant
    Filed: March 7, 1985
    Date of Patent: September 22, 1987
    Assignee: Linde Aktiengesellschaft
    Inventors: Hans Becker, Gerhard Linde
  • Patent number: 4659553
    Abstract: The invention refers to a process for the removal of undesirable gaseous components from hot flue gases incurred in the combustion of carbonaceous fuels. The flue gas is passed through regenerators for cooling and preliminary cleaning, and subsequently is scrubbed with a physically active solvent for SO.sub.2 absorption. After absorbing SO.sub.2, the solvent is subjected to regeneration and returned to the scrubbing process. For purposes of energy savings, it is suggested to heat exchange the hot flue gas in the regenerators with atmospheric air to cool it to temperatures between 0.degree. and 60.degree. C., and to scrub at this temperature with a solvent consisting predominantly of tetraethyleneglycol dimethylether. The process of the invention permits utilization of the exhaust heat of the flue gas to be purified.
    Type: Grant
    Filed: December 21, 1984
    Date of Patent: April 21, 1987
    Assignee: Linde Aktiengesellschaft
    Inventor: Gerhard Linde
  • Patent number: 4636377
    Abstract: For producing elemental sulfur, SO.sub.2 is dissolved in a regenerable solvent, which is treated with a reducing agent, and the thus-formed sulfur is separated from the solution.
    Type: Grant
    Filed: August 2, 1985
    Date of Patent: January 13, 1987
    Assignee: Linde Aktiengesellschaft
    Inventors: Michael Heisel, Freimut Marold, Gerhard Linde
  • Patent number: 4548618
    Abstract: A mixture of gases containing hydrogen and at least one further component, for example nitrogen and argon, is enriched in hydrogen in a separation stage by adsorption, or cooling and partial condensation and/or rectification and/or scrubbing. Upstream of this separation stage, at least part of the hydrogen is separated by membrane diffusion, thereby resulting in a highly improved process as compared to using either the separation stage or membrane diffusion alone, especially in connection with gaseous mixtures having components which are to be used at high pressures, e.g., a purge gas from an ammonia synthesis gas process.
    Type: Grant
    Filed: July 29, 1983
    Date of Patent: October 22, 1985
    Assignee: Linde Aktiengesellschaft
    Inventors: Gerhard Linde, Wolfgang Schmid, Manfred Boelt, Peter S. Burr
  • Patent number: 4528002
    Abstract: For separating CO.sub.2 from CO.sub.2 -containing gases, especially stack gases and/or blast furnace gases, dimethylformamide is employed as a physical scrubbing medium to ensure high CO.sub.2 purity. After absorption of CO.sub.2, the DMF is regenerated and returned into the scrubbing stage. Dimethylformamide is utilized as the scrubbing medium.
    Type: Grant
    Filed: April 23, 1984
    Date of Patent: July 9, 1985
    Assignee: Linde Aktiengesellschaft
    Inventor: Gerhard Linde
  • Patent number: 4448592
    Abstract: A method of recovering at least two product fractions each highly enriched in a respective component of a gas mixture containing at least such components are recovered by separating a stream of the mixture into at least two partial streams and passing this stream separately through respective beds of respective adsorbents and selectively retaining at least one component from each mixture so that the respective product fractions emerge from the adsorbents highly enriched in respective components of this mixture, each adsorbent for a particular one of the fractions has a composition that retains at least one component in which the other fractions is enriched.
    Type: Grant
    Filed: August 17, 1982
    Date of Patent: May 15, 1984
    Assignee: Linde AG
    Inventor: Gerhard Linde
  • Patent number: 4430303
    Abstract: In a process for the removal of sulfur dioxide and nitrogen oxides, the waste gas is cooled and scrubbed with a physical absorbent selective for sulfur dioxide. The nitrogen oxides are catalytically removed from the waste gas by reaction with ammonia, which is added to the waste gas prior to the scrubbing step. The catalyst packing is disposed in the same housing and is at the hot end of a regenerator for cooling the waste gas and is arranged upstream of the regenerator packing. The cooling is conducted to the dew point so as to dissolve residual ammonia, and air is used to remove the ammonia during regeneration, the resultant heated air being primarily used in the combustion zone.
    Type: Grant
    Filed: September 30, 1982
    Date of Patent: February 7, 1984
    Assignee: Linde Aktiengesellschaft
    Inventor: Gerhard Linde
  • Patent number: 4424857
    Abstract: To prevent disruptions in downstream processes due to non-uniform flows arising from the switching operation in two interchangeable regenerator systems, both the feed of a cold fluid to the cooled regenerator and the feed of a hot fluid to the heated regenerator are interrupted, the hot fluid is then introduced into the cooled regenerator while the cold fluid is first conducted through a heat accumulator connected in parallel with the regenerators; a portion of the fluid heated in the heat accumulator is fed into the heated regenerator to purge residual hot fluid therefrom and subsequently the cold fluid is passed in its entirety through the heated regenerator. Particular application is in preventing disruption in the flow, composition and temperature of air of combustion preheated by flue gas.
    Type: Grant
    Filed: September 30, 1982
    Date of Patent: January 10, 1984
    Assignee: Linde Aktiengesellschaft
    Inventor: Gerhard Linde
  • Patent number: 4378977
    Abstract: For removing undesired gaseous components, e.g., SO.sub.2, from hot combustion gases (from carbonaceous fuels) by scrubbing with a regenerable absorbent, the scrubbing is conducted with a liquid physical absorbent, e.g., dimethylformamide, at a temperature less than 0.degree. C. The cooling requirements of the scrubbing process are supplied by means of an absorption-type refrigeration unit. The hot combustion gases, prior to scrubbing, are cooled in indirect heat exchange, first with air in an upper temperature range cooling zone, and then with cold combustion gas purified by the scrubbing in a lower temperature range cooling zone. The resultant heated air is used in part as (a) air for combustion, and/or in part as (b) an energy source for the operation of the absorption-type refrigeration unit. A heat pump may be used to supplement the said refrigeration unit.
    Type: Grant
    Filed: October 7, 1981
    Date of Patent: April 5, 1983
    Assignee: Linde Aktiengesellschaft
    Inventors: Gerhard Linde, Peter Haeussinger, Claus Schliebener
  • Patent number: 4356013
    Abstract: In the obtaining of oxygen from air by low-temperature rectification in a double rectification column by compressing the air to be fractionated into higher and lower pressure partial streams; cooling said partial streams in indirect heat exchange with a nitrogen-enriched gaseous stream from the rectification column; and introducing the partial stream of the air to be fractionated which has been compressed to the higher pressure into the lower part of the high pressure column,the improvement of passing at least a part of the partial stream of the air to be fractionated which has been compressed to the lower pressure to a supplemental fractionating column operating at between the pressure ambient in the high-pressure column and the pressure ambient in the low-pressure column, withdrawing from said supplemental column a nitrogen-enriched liquid, passing the latter as reflux to the low-pressure column, engine expanding the remaining portion of the partial stream compressed to the lower pressure and/or a gaseous s
    Type: Grant
    Filed: January 28, 1980
    Date of Patent: October 26, 1982
    Assignee: Linde Aktiengesellschaft
    Inventors: Gerhard Linde, Guenter Rueckborn
  • Patent number: 4294590
    Abstract: For removing undesired gaseous components, e.g., SO.sub.2, from hot combustion gases (from carbonaceous fuels) by scrubbing with a regenerable absorbent, the scrubbing is conducted with a liquid physical absorbent, e.g., dimethylformamide, at a temperature less than 0.degree. C. The cooling requirements of the scrubbing process are supplied by an absorption type refrigeration unit. The hot combustion gases, prior to scrubbing, are cooled in indirect heat exchange, first with air in an upper temperature range cooling zone, and then with cold combustion gas purified by the scrubbing in a lower temperature range cooling zone. The resultant heated air is used in part as (a) air for combustion and in part as (b) an energy source for the operation of the refrigeration unit. A heat pump may be used to supplement the absorption type refrigeration unit. Other aspects include, for example, special regenerator design and absorbent regeneration steps.
    Type: Grant
    Filed: November 9, 1979
    Date of Patent: October 13, 1981
    Assignee: Linde Aktiengesellschaft
    Inventors: Gerhard Linde, Peter Haeussinger, Claus Schliebener
  • Patent number: 4091633
    Abstract: A process for the separation of a low-boiling gaseous mixture by low-temperature rectification, comprising the steps of:(a) subjecting said gaseous mixture to rectification in a high pressure zone to obtain a crude light fraction and a crude heavy fraction;(b) passing said crude light fraction and said crude heavy fraction to an intermediate pressure rectification zone to obtain an enriched gaseous overhead and an enriched liquid bottoms;(c) passing said liquid bottoms into a low-pressure rectification zone; and(d) withdrawing vapor from said low pressure rectification zone by suction, increasing the pressure of said vapor and passing said vapor into the intermediate pressure rectification zone;Whereby the pressure in the high pressure stage is lower than the pressure in a high pressure stage of a double column employing two pressure stages.
    Type: Grant
    Filed: August 6, 1976
    Date of Patent: May 30, 1978
    Assignee: Linde Aktiengesellschaft
    Inventor: Gerhard Linde