SARPs

Pershina, V., Bastug, T., Sarpe-Tudoran, C., Anton, J. and Fricke, B. (2004) Predictions of adsorption behaviour of the superheavy element 112. Nuclear Physics... 

Sarp Tuncoku, S., E. N. Caner-Saltik, and H. Boke (1998), Pozzolanic properties of some medieval masonry mortars, 31st Int. Symp. Archaeometry Abstracts, Budapest, pp. 139-142. 

SARP [Sulphuric acid recovery process] A method for recovering sulfuric acid which has been used for alkylation, for re-use. The acid is reacted with propylene, yielding dipropyl sulfate, which is extracted from the acid tar with isobutane. It is not necessary to hydrolyze the sulfate to sulfuric acid because the sulfate itself is an active alkylation catalyst. 

Kirk GJD, Bouldin DR. 1991. Speculations on the operation of the rice root system in relation to nntrient uptake. In Penning de Vries FWT, van Laar HH, Kropff MJ, eds. Simulation and Systems Analysis for Rice Production (SARP). Wageningen Pudoc, 195-203. 

M. Wollenhaupt, D. Liese, A. Prakelt, C. Sarpe-Tudoran, and T. Baumert. Chem. Phys. Lett, 419 184-190(2006). 

M. WollenhaupL A. Assion (X Ciracfc, C. Horn, D. Licsc. C. Sarpe-Tudoran,... 

The sulfuric acid recovery process (SARP), developed jointly by Texaco Inc. and Stratford Engineering Corp. to reduce the acid consumption in H2S04 alkylation units, was another contribution to alkylation technology (18). In this process the spent acid from an alkylation... 

SARP Chemical Recovery of Used Sulfuric Acid Alkylation Catalyst... 

A number of different processes involving the absorption of olefin in recycle sulfuric acid alkylation catalyst, extraction of the dialkyl sulfate, treatment of the extract in some manner, and alkylation of the treated dialkyl sulfate have been considered. One such process which has become known in the industry as SARP is the subject of this paper. SARP stands for Sulfuric Acid Recovery Process, which obviously has a rather generic connotation. The process is rather specific. The writer prefers the name originally given to the process, namely, Extractylation. However, SARP has the advantage of being known and is short, so SARP will probably prevail. 

The SARP flow in simplified form is shown in Figure 1. 

A plant was operated by Cities Service for several years. Some years ago the entire refinery where the SARP unit was located was discontinued. As was the case with the pilot unit, the SARP unit was easy to operate, and in general a steadier operation was obtained. Upsets and poor operation of units not directly a part of the recovery section, such as the feed splitter, butane isomerization unit, and deisobutanizer were not as serious when SARP was in operation. The general feeling was that an octane increase was obtained, as well as a demonstrated two thirds to three fourths reduction in acid consumption. Sufficiently precise runs under stable conditions were not made in the pilot unit or in either of two commercial plants to be certain that an increase in octane was obtained. 

Up until some time after the commercial operation of SARP in 1966, it was assumed that the discard SARP acid would or could be disposed of in the same manner as discard alkylation acid, namely, by sending it back for credit to the acid supplier. This was based on information from acid suppliers after samples of acid had been sent to them. Later, it developed that although the acid could be recovered in a sludge conversion unit, it decreased the capacity of the unit by about 502, because of the high hydrocarbon content of the acid. As a result, the discard SARP acid as far as the acid supplier was concerned, had a minor or negative value as a source of sulfur for a sludge conversion unit. 

It was found that a second SARP commercial unit of about the same design as the first one, although considerably larger, was also easy to operate, and in general gave little trouble. Using an overall olefin feed of about 35% propylene and 65% butylenes, the acid consumption was reduced to about one third. The research octane value of the total alkylate of about 375° F.E.P. was about 94 clear and 105 with 3 cc. TEL. The water content on the SARP discard acid was about 1.9% whereas without SARP it was about 4-5%, and in each case with make-up acid of 99.0-99.5%. 

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