ERODANTS AS CONVEYANCE AIDS AND METHOD OF MERCURY REMOVAL

    公开(公告)号:CA3069940A1

    公开(公告)日:2019-01-24

    申请号:CA3069940

    申请日:2018-07-03

    Applicant: CABOT CORP

    Abstract: Aspects of the present disclosure are directed to mixtures and methods for pneumatically conveying powdered materials. A method includes providing a pneumatic conveyance system with a gas stream having a gas velocity; providing particles of sorbent material having a median sorbent particle size d50, sorbent from 1 µm to 28 µm; injecting the particles of sorbent material into the gas stream; providing particles of erodant material having a median erodant particle size d50, erodant of at least 150µm, where the erodant material is provided in an amount from 0.5% to 3% by weight of the particles of sorbent material; and injecting the particles of erodant material into the gas stream, where the gas velocity is sufficient to entrain the particles of sorbent material and sufficient to convey the particles of erodant material. A mixture of sorbent material and erodant material is also disclosed.

    PROCESS FOR MAKING NON-POROUS, MICRON-SIZED HIGH PURITY SILICA

    公开(公告)号:AU7481291A

    公开(公告)日:1991-09-18

    申请号:AU7481291

    申请日:1991-02-28

    Applicant: CABOT CORP

    Abstract: A process for making non-porous, dense, silica partices having a diameter of about 3 to 1000 microns, a nitrogen B.E.T. surface area less than about 1 m2/g, a total impurity content of less than about 50 ppm and a metal impurity content content of less than about 15 ppm from an aqueous dispersion of fumed silica. The particles are converted into porous particles and sintered in an atmosphere having a water partial pressure of from about 0.2 to about 0.8 atmosphere for temperatures below about 1200 DEG C.

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