Purchase Costs of Other Chemical Processing Equipment

6 PURCHASE COSTS OF OTHER CHEMICAL PROCESSING EQUIPMENT 

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Purchase Costs of Other Chemical Processing Equipment 537... 

Table 16.32 Purchase Costs (f.o.b.) of Other Chemical Processing Equipment, CE Index = 394. Equations for pumps, compressors, motors, heat exchangers, and pressure vessels are in Section 16.5 ... 

Capital cost estimates for chemical process plants are often based on an estimate of the purchase cost of the major equipment items required for the process, the other costs being estimated as factors of the equipment cost. The accuracy of this type of estimate will depend on what stage the design has reached at the time the estimate is made, and on the reliability of the data available on equipment costs. In the later stages of the project design, when detailed equipment specifications are available and firm quotations have been obtained, an accurate estimation of the capital cost of the project can be made. 

Given the above analysis and also the high cost of purchasing relatively small quantities of 5-aminoimidazole-4-carboxamide (XXIII, AIC), we in Chemical Development were given the backing to explore other possibilities and identify a safer, lower-cost route to Temozolomide that would avoid the hazards and preferably require conventional rather than specialist equipment. Another requirement, made necessary by the heavy workload in our New Jersey Chemical Development operation, was that we find an outside partner to carry out the process exploration work with us. 

One of the major costs involved in any chemical process is for the equipment. In many cases, standard types of tanks, reactors, or other equipment are used, and a substantial reduction in cost can be made by employing idle equipment or by purchasing second-hand equipment. If new equipment must be bought, several independent quotations should be obtained from different manufacturers. When the specifications are given to the manufacturers, the chances for a low cost estimate are increased if the engineer does not place overly strict limitations on the design. 

The purchased-equipment cost for a plant which produces pentaerythritol (solid-fuel-processing plant) is 300,000. The plant is to be an addition to an existing formaldehyde plant. The major part of the building cost will be for indoor construction, and the contractor s fee will be 7 percent of the direct plant cost. All other costs are close to the average values found for typical chemical plants. On the basis of this information, estimate the following ... 

The two major costs associated with evaporators, as with any process equipment, are capital investment and operating costs. The best estimate of the installed cost of evaporation systems is, of course, a firm bid from a vendor. The installed cost, however, can be estimated based on the heat transfer surface area, as in Peters and Timmerhaus. Costs taken from published references must be adjusted for changes subsequent to the time of publication. To do this, one may use an index such as the Marshall and Swift allindustry index. The value of this index is published each month in Chemical Engineering, a McGraw-Hill publication. Further information on the use of this and other cost indices as well as their histories are available, for example, in Peters and Timmerhaus and Ulrich.f Variation of purchased evaporator costs with material of construction and pressure can also be found in Ulrich. ... 

A drop-in replacement that requires no new equipment is more likely to be adopted than one that requires major purchases of new equipment. If more equipment has to be added to space that is not in the present plant, then the cost of expanding the building must be considered. Some process changes can involve major changes to equipment unfamiliar to the current personnel. For example, discharge of heavy metal ions in the wastewater from an electroplating plant can be avoided by vacuum metallization, chemical vapor deposition, and other such. The equipment will be quite... 

Steam-Generating Facilities These form the second largest investment item for chemical-plant auxiliaiy equipment. Variations in capacity, location indoors or outdoors, the type of fuel used, pressure and temperature levels, and the type of process served have an important effect on actual cost as well as on cost relative to other auxiliaiy items. Package boiler instaUations can be purchased as shop-built units which are assembled, piped, and wired ready to be erected on the owner s foundations. They are available in units up to about 136,000 kg/h (300,000 Ib/h), although units larger than about 45,360... 

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