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TAPPI Meets in New Orleans A STAFF REPORT
J \ s atmosphere of whole-hearted cooperation pervaded t h e meeting of the Technical Association of the Pulp and Paper Indus t ry held in New Orleans. The representatives of the industry who gathered for this second national meeting sponsored by the Alkaline Pulping and Chemical Products Committees succeeded admirably in their fixed purpose to get down to a rock-bottom consideration of their common problems and then share their solutions to these problems. There was constant attendance a t all t h e sessions of the 200 registered at T A P P I headquarters at the Roosevelt Hotel, and interest in the papers was evidenced by the discussions.
In symposium form, a consideration of sulfate pulp washing occupied,half of the technical session, Oct. 14 and 5. "*lant layouts in connection with various systems of washing and the problems encountered in these systems were discussed, with comparisons of the operation of diffuses , screw presses, and rotary pulp washers. P . J. Hannan of the Southern Advance Bag and Paper Co. admitted t h a t the open-top diffuser was equipment to be used only if already installed, its only advantage being in somewhat greater throughput . A. J. Suter, chairman for the symposium, in presenting the experience of the Gay lord Container Corp. , described the experimentation leading to t he conclusion t h a t rotary pulp washers a re superior to closed diffuser systems and are much more flexible and dependable.
All the symposium participants were in agreement tha t the major problems in sulfate pulp washing were the removal and recovery of as much soda as possible and t h e production of a clean pulp. 11. C. Richter established as t h e first prerequisite in planning a study of washing efficiency the evolving of a satisfactory method for determination of the total residual soda in the pulp, and discussed the magnesium uranium acetate method of Scott as used by the National Container Corp., giving a detailed description of t he methods of sampling and testing. M. Klein of the Union Bag and Paper Corp.
Savannah, Ga.. confirmed the views of previous speakers tha t increased water temperature results in better rotary washing and tha t t he hardness of pulp has a definite bearing on • efficiency of washing. General opinion seemed to indicate that , while screw-type washers are satisfactory, they are not elastic enough in operation.
Among the general papers a discussion of the collection of sulfate turpentine by \V. P. Lawrence of Champion Paper and Fibre Co., Canton, N. C , was of considerable interest, clue to the fact tha t his presentations were the summary of questionnaire answers from 24 mills. Mr. Lawrence stated that the chemical products of the sulfate pulping industry have grown steadily in importance, and t h a t while production of gum spirits has just as steadily dropped and that of steam-distilled wood turpentine showed no gain, sulfate turpentine amounts to 2 3 % of this country's total production. In outlining a fairly standardized method of collection, he indicated that the chief operating problems lay in the formation of emulsions and the corrosion of storage equipment. Emulsions could be prevented, Mr. Lawrence pointed out, by using greater care in relieving digesters and by using two separators in series. S. G. Norton of Hercules Powder Co. observed tha t corrosion did not occur in full tanks, b u t was generally found in the vapor space above the turpentine in storage tanks not completely filled. He proposed stainless steel, Everdur, or nickel for storage of crude sulfate turpentines, stating tha t corrosion is probably a more universal problem than is realized and could be attr ibuted to volatile sulfur compounds.
Nomographs for t h e calculation of fuel and soda value of tall oil skimmings were presented by Paul R. Wiley of the West Virginia P u l p and Paper Co. of Charleston, S. C. Mr . Wiley called these a practical basis for computing values of skimmings, tak ing into account fuel and chemical equivalents and changing prices, particularly useful where actual da ta on tall
oil yield and black liquor solids arc not available. A short résumé o( t h e present s ta tus of ASTM methods of testing tal l oil was give»!. In general, the results of the physical tests made hy 13 laboratories participating in comparative work on t h e tentative methods were good, -while t h e chemical tests were not satisfactory. Samples will again be sent out, with emphasis on electrometric inctho>ds where such are applicable.
W . F. Gillespie, technical director of the Gaylord Container Cor])., and general
Above. Chemical Pro flue ts Committee: W. P. Laivrence, Champion Paper & Fibre Co., It. II. Stevens, chairman, National Container Corp., arid It. A. Morgan, University of Florida. Below. Back ro-τν. Mrs. liraun, It. tl. Stevens* Mrs. Alfred Suter, Kenneth (Zhesley^ chairman, Alkaline Pulping Committee. Front row. Mrs. W. F- Gillespie, ,/. ΙΓ. Hemphill, and IP". F. Gillespie
chairman of the meeting, gave a detailed study entitled "Jordan Refining of Southern Sulfate P u l p " . Though the li terature is not extensive, Mir. Gillespie outlined experimental work done in determining the refining to be ixsed in conjunction with a new 196-inch trim Four-drinier machine. Taking data on a Miami No . 2 Jordan, some of the conclusions were t h a t consistency should be reasonably high, applied power as great a s practical, throughput at 3 . 5% not more than about 750 gallons a minute, and. the quantity of alum added before refining held to a practical minimum.
A tour through the plant of the Gaylord Corp. a t Bogalusa, La., took place o n the third day. Highlight of* the banquet was a. talk by TAPPE President G. W . E . Nicholson, on his recent experiences as one of the distinguished American technical men invited to tour Scandinavia as guests of the Swedish government.
Left. S van Fralgren, Hi rd Machine Co., J. li. Ho man 9 A. E.Staley Mfg. Co., It. C. Macdonuld, secretary, TAPPI. Right. E. L. Cowan* Gaylord Container Corp., Alfred Suter, symposium chairman., and G. IV. E. iVicholson, TAPPI president
V O L U M E 2 4, N O . 2 1 . N O V E M B E R 1 0 , 1 9 4 6 2919