Dialkyl-3-acetyl-4-hydroxybenzyl phosphonates
    1.
    发明授权
    Dialkyl-3-acetyl-4-hydroxybenzyl phosphonates 失效
    二乙基-3-乙酰基-4-羟基苯基磷酸酯

    公开(公告)号:US3767735A

    公开(公告)日:1973-10-23

    申请号:US3767735D

    申请日:1971-03-24

    Inventor: FENYES J FLANAGAN K

    CPC classification number: C08K5/5333 C07F9/4056

    Abstract: METAL MONO-, BIS-, AND TRIS-DERIVATIVES OF PHOSPHONIC ACID HALF-ESTERS USEFUL AS ULTRAVIOLET LIGHT ABSORBERS ARE PREPARED BY REACTING A DIALKYL-3-ACETYL-4-HYDROXYBENZYL PHOSPHONATE WITH AN ALKALI-METAL HYDROXIDE TO FORM THE ALKALIMETAL DERIVATIVE WHICH IS THEN CONVERTED TO THE BIS- OR TRISDERIVATIVE BY REACTION WITH A BI- OR TRIVALENT METAL CHLORIDE.

    8.
    发明专利
    未知

    公开(公告)号:BR7805732A

    公开(公告)日:1979-12-18

    申请号:BR7805732

    申请日:1978-08-31

    Inventor: PERA J FENYES J

    Abstract: Aminoalkylenephosphonic acids and their alkali metal salts prepared by a reaction utilizing a primary or secondary tetrahydrothiophenamine 1,1-dioxide or the hydrochloride thereof, an aldehyde or a ketone, and orthophosphorous acid are useful in the control of scale and sludge deposition in aqueous systems. When used in combination with known corrosion inhibitors they show synergistic results in inhibiting corrosion of metal surfaces in contact with an aqueous system that is normally corrosive to such metals.

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