DC Antifoam A Kills Foam in Caustic Liquors

For:m is α particularly troublesome problem at the Wyandotte, Michigan, plant of Penn Salt. In making flake caustic soda, Pennsyl­vania Salt boils concentrated caustic liquors in large 20 ton pots. The process is relatively easy to control until temperatures reach 260 c

to 280°C. At those temperatures foam be­gins to form in large quantities.

One }A ounce capsule of DC Antifoam A kills foam in caustic soda liquor more effectively than 2 to 5 pounds of grease and cuts processing time by 4 to 6 hours per pot.

PHOTO COURTESY PENNSYLVANIA SALT MANUFACTURING COMPANY

Before using DC Antifoam A, Pennsylvania Salt added 2 to 5 pounds of petroleum cup grease to each pet. This decreased the foam­ing but the grease "flashed" and smoked, making it hard for the operator to determine whether the foam was actually under control. By adding 1 part DC Antifoam A to a million parts of caustic liquor, however, Pennsylvania Salt has completely eliminated foam and potential overflows. When foam first ap­pears, a capsule containing half an ounce of DC Antifoam A is thrown into the pot. All foam is immediately downed and the proc­ess continues with temperatures rising to 320° C. Processing time is shortened by 4 t o 6 hours per pot. And the cost of the DC Anti­foam A required is no greater than the cost of the cup grease. DC Antifoam A is generally effective in con­centrations ranging from 1 to 5000 parts per million in a wide variety of aqueous and non­aqueous systems. For more information about DC Antifoam A, call our nearest branch office, or write for pamphlet No. B5-T.

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ow orning F I R S T I N S I L I C O N E S

"^ÊÊÊÊ^^ÊÊ^ Eleiaxntion

Looking through the necrology items published in this and other scientific and technical publications, it is distressing and alarming to note how many members of the profession pass away in the very prime of life. Our good friend, Larry V. Burton, former editor of Food Industries, was told in 1034 that he had a maximum of five years to live if he did not develop a relax­ing hobby. Larry developed an interest in painting and we mean portraits and landscapes—not garden furniture. His experiences are set forth in a new book en­titled, "Week-End Painter ." We recom­mend it as a possible solution to our friends in the chemical field suffering from hyper­tension.

Painting seems to be a very popular-hobby with chemists a n d chemical engi­neers. Not long ago we spent a very pleasant evening viewing some water-color sketches painted b y Francis J. Cur­tis of Monsanto Chemical Co., during a vacation visit to Cape Cod.

Painting and photography seem to be quite high in the list of relaxing hobbies pursued by those in the chemical and chem­ical engineering professions.

Munificence

We have jus t learned from A. A. Bene-detti-Pichler t ha t in 1948 he received a p ­proximately $200 from ACS members t o finance C A R E packages for chemists in various parts of Europe . In addition t o contributions of money, Dr. Benedett i- . Pichler's office has acted as a clearing­house for food and clothing packages for a number of needy chemists and their families located in the war-devasted coun­tries of Europe. One ACS member has not only provided continuously for a chemist 's family in Austria bu t has invited the eldest daughter in t h e family for an ex­tended stay in the United States and in ­tends to finance a college education.

Here is one of the finest commentaries o n the chemical profession tha t we have witnessed in many years.

Clever

Chemistry is a wronderful thing. Or so one paint salesman is convinced. Accord­ing to reports we received this salesman was trying to put the final clincher in h i s oration on the weathering and protective qualities of his paint and the cleverness of "those Ph .D. ' s , " as he called them. "And do you know," he said, " they tell me t h a t they have made the pigment particles in the shape of little keystones, which jus t naturally fall together as the paint is p u t on a surface and provide a solid interlock­ing wall of resistance. ' '

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M a d e of stainless steel and other alloys, with or without agitating mechanisms, heat* ins jackets and removable corrosion-resistant liners (flasks), in various standard types ranging in volumes from S3 m l . to 6 gai., ior working pressures up to 60 ,000 psi , and for temperatures up to 800 °F. Special types engineered to meet individual re­quirements.

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