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    Selective floculation process for the recovery of Phosphate
    5.
    发明专利
    Selective floculation process for the recovery of Phosphate 未知

    公开(公告)号：JO1473B

    公开(公告)日：1988-03-10

    申请号：JO19871473

    申请日：1987-08-31

    Applicant: RESOURCE TECHN ASS

    Inventor： DOUGLAS R SHAW

    Abstract: A process for separating and recovering non-metallic minerals, particularly phosphate, ‎from an ore containing non- uniform sized particles, including colloidal particles , the ‎ore is slurried in alka- line , aqueous solution with a dispersing agent, a flotation ‎collector is added, and the mixture is contacted with a hydrophobic , high molecular ‎weight, nonionic polymer to flocculate the fine particles and make them amenable to ‎subsequent flotation, a second embodiment provides a process for the recovery of an ‎upgraded non-metallic ore from ore slimes, such as phosphate slimes, utilizing a high ‎molecular weight, polyacryamide, anionic flocculating agent

    METHOD FOR RECOVERY OF CYANIDE FROM WASTE STREAMS
    6.
    发明专利
    METHOD FOR RECOVERY OF CYANIDE FROM WASTE STREAMS 未知

    公开(公告)号：ZA864846B

    公开(公告)日：1987-03-25

    申请号：ZA864846

    申请日：1986-06-30

    Applicant: RESOURCE TECHN ASS

    Inventor： COLTRINARI ENZO L

    IPC: B01J41/04 ,  C02F9/00 ,  B01D

    Abstract: A process is provided for removing cyanide from a dilute cyanide solution. The solution is passed through a weak base anion exchange resin to absorb cyanide complexes. The resin is eluted with a weakly basic Ca(OH)2 solution, to produce a cyanide-rich eluate. Elution is accomplished by recycling the eluting fluid past a bed of solid Ca(OH)2, to maintain the eluting fluid in Ca(OH)2 saturation. Recycling in this manner produces an eluate with relatively high cyanide concentration using economical reagents. The eluate is subjected to an acidification/volatilization process including acidification, preferably with H2SO4, heating by introduction of steam and removal of volatilized HCN by an air sparge. The HCN-rich off-gas and slats produced therefrom may be recycled in the process. The cyanide-depleted waste streams may be disposed of in, for example, tailings ponds.

    APPARATUS FOR THERMAL TREATMENT OF A HYDROCARBON STREAM
    7.
    发明专利
    APPARATUS FOR THERMAL TREATMENT OF A HYDROCARBON STREAM 未知

    公开(公告)号：CA1327952C

    公开(公告)日：1994-03-22

    申请号：CA615474

    申请日：1989-09-29

    Applicant: RESOURCE TECHN ASS

    Inventor： BAIN RICHARD L ,  LARSON JOHN R

    IPC: C10G9/20

    Abstract: An apparatus is disclosed for improving the transportability of a hydrocarbon stream by reducing its viscosity. The apparatus comprises a reactor vessel useful for providing an incremental amount of heat to a hydrocarbon stream by the introduction of an oxidizing agent into the core portion of the stream. The reactor comprises an influent conduit and an effluent conduit in heat exchange relation with each other, at least one oxidant injection nozzle located in either or both the influent and/or effluent conduits, a conduit to transport oxidant to the nozzles and valve means in the oxidant conduit to control oxidant flow to the nozzles. The reactor can also contain temperature monitors in the influent and/or effluent conduits and an oxidant flow controller, device responsive to output from the temperature monitors and adapted to adjust oxidant flow to maintain temperatures in the reactor reaction zone within a preselected range.

    VISCOSITY REDUCTION BY DIRECT OXIDATIVE HEATING
    8.
    发明专利
    VISCOSITY REDUCTION BY DIRECT OXIDATIVE HEATING 未知

    公开(公告)号：CA1298803C

    公开(公告)日：1992-04-14

    申请号：CA568561

    申请日：1988-06-03

    Applicant: RESOURCE TECHN ASS

    Inventor： BAIN RICHARD L ,  LARSON JOHN R

    IPC: C10G9/00 ,  C10G27/04

    Abstract: A method is disclosed for reducing the viscosity of a hydrocarbon feed. The feed is heated from an initial temperature to a second temperature and an oxidizing agent is introduced to oxidize components in the feed and provide heat to increase the temperature of the feed to a reaction temperature. The reaction temperature is maintained to produce a reaction product having a lower viscosity than the feed.

    PROCEDE DE FLOCONNATION SELECTIVE POUR LE RECOUVREMENT DU PHOSPHATE
    9.
    发明专利
    PROCEDE DE FLOCONNATION SELECTIVE POUR LE RECOUVREMENT DU PHOSPHATE 未知

    公开(公告)号：TNSN87089A1

    公开(公告)日：1990-01-01

    申请号：TNSN87089

    申请日：1987-07-15

    Applicant: RESOURCE TECHN ASS

    Inventor： DOUGLAS R SHAW

    Abstract: UN PROCEDE POUR LA SEPARATION ET LE RECOUVREMENT DES MINERAUX NON-METALIQUES, PARTICULIEREMENT LE PHOSPHATE, D'UN MINERAI CONTENANT DES PARTICULES DE GRANDEURS QUI N'EST PAS UNIFORME, Y COMPRIS LES PARTICULES COLLOIDES. LE MINERAI EST AMALGAME POUR ETRE UNE SOLUTION AQUEUSE ALKALINE, AVEC UN AGENT DISPERSANT. UN COLLECTEUR DE FLOTTEMENT EST AJOUTE, ET LE MELANGE EST MIS EN CONTACT AVEC UN POLYMER, HYDROPHOBIQUE QUI A LE POIDS DE MOLECULE HAUT POUR FLOCONNER LES FINES PARTICULES ET LES RENDRE RESPONSABLES DU FLOTTEMENT SUBSEQUENT. UNE SECONDE INCARNATION FOURNIT UN PROCEDE POUR LE RECOUVREMENT D'UN MINERAI NON-METALIQUE A HAUTE GRADUATION DES MATIERES AMALGAMEES DU MINERAI, COMME LES MATIERES AMALGEMEES DE PHOSPHATE, EN UTILISANT UN AGENT FLOCONNEUX ANIONIQUE, POLYACRYLAMIDE QUI A UN GRAND POIDS DE MOLECULE

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