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We undertake Engineering and Construction of complete Plants for the production of Hydrofluoric Acid Cryolith Aluminium Fluoride Sulphuric Acid (contact and tower process) Sulphur Dioxide 1 0 0 % Sodium Hydrosulphite Carbon Bisulphide Superphosphate, granulated BUSS LTD. BASLE/PRATTELN Circle No. M A-1 · • Readers' Service Card, pate 101 A Round-the-clock operation of an 18" diameter SWECO Vibrating Screen Separator has helped double capac- ity for Essential Chemicals Company of Fredonia, Wis. This company is one of the nation's large manu- facturers of alkyl aryl sulphonate (sodium salt). The company uses this sulphonate salt for its own deter- gents and also supplies other manufacturers. Dust-free operation of this SWECO Separator was a major factor in its selection by Essential Chemicals for use in screening sodium base. Essential's specifications require a sodium base of uni- form particle size, which provides control of product density. Ease of changing screen cloths on the SWECO unit permits rapid selection and installation of desired screen cloth opening. This* enables the company to obtain densities specified by customers. The SWECO Separator requires no attention during operation. Its compactness and dust-free design were major factors in its selection by the chemical firm. Screening Analysis and Recommendations Available Your nearby SWECO District Engineer is available to help you with special screening problems. His "know- how" covers 200 different materials . . . wet and dry, coarse and fine, heavy and light. He will demonstrate, in your plant, how a SWECO Separator can screen your material economically and efficiently. No obligation, of course. A complete data file on screening chemical products plus a 22-page catalog are yours for the asking. Write for Bulletin S-106-10. VOL. 49, NO. 8 · AUGUST 1957 9 9 A fcUEE (Switzerland) Department for Plants processing inorganic chemical products ίΐι±1η, r4i h 1111 ττ,ι,,ι,ι r, .h ι η ι :_iu-ΐα^ίί Ε Ι I Ft, i fbl : : -τ-Η [ Π ι 11 "ΐι ιΤΐ ι ιΤΐιιΓ SWECO Unit Doubles Sulphonate Salt Capacity in 24-Hour Operation for Chemical Firm SWECO SEPARATORS SOUTHWESTERN ENGINEERING COMPANY 4800 Santa Fe Ave., Los Angeles 58 LUdlow 3-6262— Cable-, SWECOLA Engineers and Constructors ... Manufacturers Circle No. 99 A-2 on Readers' Service Card, page 101 A
