公开(公告)号：EP1086192B1

公开(公告)日：2006-10-11

申请号：EP99905947.0

申请日：1999-02-10

申请人： BetzDearborn Inc

发明人： ARHANCET, Graciela, B.

IPC分类号： C09K15/00 ,  C07C7/20

CPC分类号： C08F112/08 ,  C07B63/04 ,  C07C7/20 ,  C07C17/42 ,  C07C49/683 ,  C09K15/14 ,  C09K15/20 ,  C07C15/46 ,  C07C25/28

摘要： Synergistic composition and method of use are disclosed. The compositions comprise a quinone methide derivative and a hydroxylamine compound. These compositions demonstrate synergism at inhibiting the polymerization of a vinyl aromatic monomer. Preferably the quinone methide derivative is 2,6-di-tert-butyl-4-benzylidene-cyclo-2,5-dienone and the hydroxylamine compound is N,N-bis(hydroxypropyl)-hydroxylamine.

公开(公告)号：EP1027124B1

公开(公告)日：2005-12-21

申请号：EP98934652.3

申请日：1998-07-21

申请人： BetzDearborn Inc

发明人： HART, Paul, R.

IPC分类号： B01D17/00 ,  B01D17/04 ,  C10G29/00 ,  C10G29/20 ,  C10G19/00

CPC分类号： C10G19/00

摘要： A method for inhibiting foam formation in a stripper of an amine unit is disclosed. The addition of non-foaming demulsifiers to the liquid, compressed hydrocarbon stream entering or the aqueous organic amine stream entering or exiting an absorber of an amine unit effectively inhibits foam formation in the amine unit stripper. Foam formation in the stripper is inhibited by controlling the entrainment of hydrocarbon in the alkaline amine stream entering the stripper through demulsification treatment in the absorber.

公开(公告)号：EP1196253A4

公开(公告)日：2005-05-04

申请号：EP00932447

申请日：2000-05-16

申请人： BETZDEARBORN INC

发明人： WINSLOW M CRAIG ,  WEBER LARRY J

IPC分类号： B08B9/093 ,  B08B9/08

CPC分类号： B08B9/0933

摘要： A method and apparatus for cleaning the interior of the storage tanks (100) of the type for storing large volumes of liquids, such as crude oil, wherein hydrocarbon sludge accumulates with the passage of time, such apparatus comprising concentric hollow pipes, a spray nozzle for injecting a flushing fluid, and connecting means including a packing gland (650) which allows the concentric pipes to be movably oriented inside a storage tank through a manway. With this construction, a flushing fluid can be sprayed into a sludge layer in the storage tank through the inner pipe and sludge/flushing fluid withdrawn through the annular region between the concentric pipes. The packing gland (650) in the connecting means and a second packing gland (660) between the inner and outer pipes allows for independent movement of the pipes within the storage tank.

公开(公告)号：EP1190112B1

公开(公告)日：2003-10-15

申请号：EP00923213.3

申请日：2000-04-10

申请人： BetzDearborn Inc

发明人： CHENG, Longchun

IPC分类号： C23F11/14

CPC分类号： C09K15/20 ,  C23F11/149

摘要： Non-halogen substituted, nitrogen containing, aromatic compounds are disclosed which are effective copper corrosion inhibitors in aqueous systems being treated with a halogen biocide. The materials of the present invention exhibit copper corrosion inhibition comparable to tolyltriazole in the absence of halogen, copper corrosion rates of less than about 2.5 mills per year in aqueous systems where halogen is present; and do not exhibit a detrimental effect on halogen demand in an aqueous system being treated.

公开(公告)号：EP1097258A4

公开(公告)日：2003-06-25

申请号：EP99918477

申请日：1999-04-08

申请人： BETZDEARBORN INC

发明人： ROE DONALD C

IPC分类号： C23F11/10 ,  C02F5/10 ,  C02F5/14

CPC分类号： C02F5/10

摘要： A method of controlling the deposition of silica-containing scales and their adhesion to surfaces in contact with an aqueous system is disclosed which comprises adding to the aqueous system a synergistic combination of: (a) diethylenetriamine penta methylene phosphonic acid; and (b) a material selected from the group consisting of 2 phosphonobutane-1,2,4-tricarboxylic acid; high molecular weight, 3:1, acrylic acid/allylhydroxy-propylsulfonate ether copolymer; ethylene oxide-propylene oxide block copolymers; and polyepoxysuccinic acid and salts thereof.

公开(公告)号：EP0821704B1

公开(公告)日：2002-08-07

申请号：EP96915317.0

申请日：1996-04-09

申请人： BetzDearborn Inc

发明人： KUO, Lawrence, Lu ,  LEUNG, Roger, Yiming ,  WILLIAMS, Kenneth, Samuel

IPC分类号： C08F226/02 ,  C08F8/00 ,  C02F1/56 ,  D21H21/10

CPC分类号： C02F1/56 ,  C08F8/44 ,  C08F220/34 ,  C08F226/02 ,  C08F2810/20 ,  C08F8/12

摘要： A water-soluble cationic copolymer comprising the reaction product of (I) and a cationic quaternary amine having formula (a), wherein Y is (b) and n is 1 to 5; R?1, R2, R3¿ are independently H or C¿1? to C3 alkyl, R?4, R5 and R6¿ are independently C¿1? to C3 alkyl, X is a halide, hydroxyl or C1-C3 alkylsulfate anion. A second water-solulble cationic copolymer having general formula (II), wherein Z represents (c), or residual groups of -CH2N?O(R4R5)CH¿2CH=CH2X-, or mixtures thereof, and n is 1 to 5; R?1, R2 and R3¿ are independently selected from the group consisting of H or C¿1? to C3 alkyl; R?4, R5 and R6¿ are independently C¿1? to C3 alkyl, and X is a halide, hydroxyl or alkylsulfate anion; and wherein x, y and q represent molar percents of monomeric units in the copolymer such that q is 1 to 99 mol %, and the molar ratio of x to y is from 0 to 10. The copolymers of this invention are useful as flocculating agents and as drainage/retention aids in pulp and papermaking operations.

公开(公告)号：EP1097258A1

公开(公告)日：2001-05-09

申请号：EP99918477.3

申请日：1999-04-08

申请人： BetzDearborn Inc

发明人： ROE, Donald, C.

IPC分类号： C23F11/10

CPC分类号： C02F5/10

摘要： A method of controlling the deposition of silica-containing scales and their adhesion to surfaces in contact with an aqueous system is disclosed which comprises adding to the aqueous system a synergistic combination of: (a) diethylenetriamine penta methylene phosphonic acid; and (b) a material selected from the group consisting of 2 phosphonobutane-1,2,4-tricarboxylic acid; high molecular weight, 3:1, acrylic acid/allylhydroxy-propylsulfonate ether copolymer; ethylene oxide-propylene oxide block copolymers; and polyepoxysuccinic acid and salts thereof.

公开(公告)号：EP1086192A1

公开(公告)日：2001-03-28

申请号：EP99905947.0

申请日：1999-02-10

申请人： BetzDearborn Inc

发明人： ARHANCET, Graciela, B.

IPC分类号： C09K15/00 ,  C07C7/20

CPC分类号： C08F112/08 ,  C07B63/04 ,  C07C7/20 ,  C07C17/42 ,  C07C49/683 ,  C09K15/14 ,  C09K15/20 ,  C07C15/46 ,  C07C25/28

摘要： Synergistic composition and method of use are disclosed. The compositions comprise a quinone methide derivative and a hydroxylamine compound. These compositions demonstrate synergism at inhibiting the polymerization of a vinyl aromatic monomer. Preferably the quinone methide derivative is 2,6-di-tert-butyl-4-benzylidene-cyclo-2,5-dienone and the hydroxylamine compound is N,N-bis(hydroxypropyl)-hydroxylamine.

公开(公告)号：EP1068502A1

公开(公告)日：2001-01-17

申请号：EP99906902.4

申请日：1999-02-10

申请人： BetzDearborn Inc

发明人： CHEN, Haiwen ,  HONG, Ke ,  GUNTHER, John, C.

IPC分类号： G01M3/04

CPC分类号： F22B37/421 ,  G01M3/228

摘要： Methods and apparatus are provided for detection of leaks in boilers (10) containing a temperature control liquid (12) which is supplemented with feedwater and removed as blowdown. The methods include measuring rates associated with the feedwater supplementation and blowdown (18), adding a tracer to the temperature control liquid, determining the change in rate of the feedwater supplementation, determining the mass of the temperature control liquid, deriving the change in concentration of the chemical tracer in the temperature control liquid, calculating the unaccounted for water rate and comparing this rate with zero to determine if a leak condition is present.

公开(公告)号：EP0975551A4

公开(公告)日：2001-01-17

申请号：EP98911491

申请日：1998-02-05

申请人： BETZDEARBORN INC

发明人： PALARDY WILLIAM J ,  DIANGELO NANCY A

IPC分类号： C02F5/10 ,  C02F5/14 ,  C02F5/00

CPC分类号： C02F5/14 ,  C02F5/10

摘要： A method of inhibiting the precipitation and deposition of calcium oxalate scale in an aqueous system is disclosed, in which an effective amount of a combination of a high molecular weight lignosulfonate compound and a phosphate compound is added to the system.