Patents Represented by Attorney Herbert C. Rose

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  • Membrane processes for treatment of and recovery of components from kraft black liquors
    Patent number: 4775480
    Abstract: A process for the treatment of an aqueous stream containing an acid or base and typically a precipitatable material such as a metal ion comprises:(a) subjecting the aqueous stream to (i) a treatment to produce a relatively pure stream of water and a concentrated aqueous stream, and (ii) water splitting to produce a stream of base, a stream of acid and a dilute aqueous stream of a concentration lower than the concentrated aqueous stream, the treatments (i) and (ii) being effected in either order,(b) recycling at least part of the pure water stream produced in (a) (i) to an earlier stream either in the production leading to said aqueous stream or to step (i) or (ii),(c) recycling at least part of the acid and/or base streams produced in (a) (ii) to an earlier stream either in the production leading to said aqueous stream or to an earlier step in the process, and(d) recycling at least part of the lower concentration stream produced in (a) (ii) to either (a) (i) or to another step in the process, whereby, when pr
    Type: Grant
    Filed: January 29, 1987
    Date of Patent: October 4, 1988
    Assignee: GNB Incorporated
    Inventors: Everett C. Milton, Harry P. Gregor
  • Membrane processes for metal recovery and pollution control in metal process industries
    Patent number: 4655928
    Abstract: A process for the treatment of an aqueous stream containing an acid or base and typically a precipitatable material such as a metal ion comprises:(a) subjecting the aqueous stream to (i) a treatment to produce a relatively pure stream of water and a concentrated aqueous stream, and (ii) water splitting to produce a stream of base, a stream of acid and a dilute aqueous stream of a concentration lower than the concentrated aqueous stream, the treatments (i) and (ii) being effected in either order,(b) recycling at least part of the pure water stream produced in (a)(i) to an earlier stream either in the production leading to said aqueous stream or to step (i) or (ii),(c) recycling at least part of the acid and/or base streams produced in (a)(ii) to an earlier stream either in the production leading to said aqueous stream or to an earlier step in the process, and(d) recycling at least part of the lower concentration stream produced in (a)(ii) to either (a)(i) or to another step in the process, whereby, when presen
    Type: Grant
    Filed: October 18, 1983
    Date of Patent: April 7, 1987
    Assignee: GNB Incorporated
    Inventors: Everett C. Milton, Harry P. Gregor