公开(公告)号：US3657136A

公开(公告)日：1972-04-18

申请号：US3657136D

申请日：1969-12-29

Applicant: BETZ LABORATORIES

Inventor： LIEBERMAN HILLEL ,  HENDERSON JOHN W

IPC: B01D19/04 ,  B01D

CPC classification number: C07C255/00 ,  B01D19/0404

Abstract: THE PRESENT DISCLOSURE IS DIRECTED TO A METHOD OF DEFOAMING AND INHIBITING FOAM FORMATION EXPERIENCED IN ACRYLONITRILE PRODUCTION SYSTEMS. THE METHOD OF PROCESS GENERALLY COMPRISES IN ITS BROADEST SENSE, ADDING TO SAID SYSTEM A COMPOSITION COMPRISING AT LEAST ONE HYDROCARBON OIL, AT LEAST ONE ALKALINE EARTH METAL HYDROXIDE AND AT LEAST ONE FATTY ACID CONTAINING FROM ABOUT 12 TO ABOUT 22 CARBON ATOMS. THE COMPOSITION MAY ALSO CONTAIN WATER AND A POLYETHER POLYOL. THE COMPOSITION, OF COURSE IS ADDED TO SAID SYSTEMS IN AN AMOUNT SUFFICIENT TO CONTROL THE FOAM.

公开(公告)号：US3697439A

公开(公告)日：1972-10-10

申请号：US3697439D

申请日：1969-05-26

Applicant: BETZ LABORATORIES

Inventor： LIEBERMAN HILLEL ,  DUHARTE-FRANCIA CARLOS A ,  HENDERSON JOHN W

IPC: B01D19/04 ,  B01D

CPC classification number: B01D19/0404 ,  B01D19/0459 ,  B01D19/0463

Abstract: THIS DISCLOSURE RELATES TO DEFOAMING COMPOSITIONS AND THEIR USE IN CONTROLLING FOAM IN AQUEOUS SYSTEMS. THE COMPOSITIONS WHICH CAN BE EMULSIVE IN CHARACTER CONSIST ESSENTIALLY OF A COMBINATION OF ALUMINUM OXIDE PARTICLES, AT LEAST ONE ALKALI METAL OR ALKALINE EARTH METAL HYDROXIDE, AT LEAST ONE FATTY ACID CONTAINING FROM 6 TO 24 AND PREFERABLY 16 TO 22 CARBON ATOMS, AND A WATER-INSOLUBLE LIQUID ORGANIC CARRIER. THE COMPOSITION MAY CONTAIN WATER, AND WHERE THE LIQUID CARRIER IS HYDROPHOBIC IN CHARACTER, THE COMPOSITION WILL BE AN EMULSION. MOREOVER, IN CERTAIN INSTANCES IN IS DESIRABLE TO INCORPORATE SURFACE-ACTIVE AGENTS (SURFACTANTS) OR SPREADING AGENTS IN THE COMPOSITION.