DIPPR database

The model contains a surface energy method for parameterizing winds and turbulence near the ground. Its chemical database library has physical properties (seven types, three temperature dependent) for 190 chemical compounds obtained from the DIPPR" database. Physical property data for any of the over 900 chemicals in DIPPR can be incorporated into the model, as needed. The model computes hazard zones and related health consequences. An option is provided to account for the accident frequency and chemical release probability from transportation of hazardous material containers. When coupled with preprocessed historical meteorology and population den.sitie.s, it provides quantitative risk estimates. The model is not capable of simulating dense-gas behavior. 

Although the code is based on well-recognized models referenced in the literature, some of the underlying models are based on "older" theory which has since been improved. The code does not treat complex terrain or chemical reactivity other than ammonia and water. The chemical database in the code is a subset of the AIChE s DIPPR database. The user may not modify or supplement the database and a fee is charged for each chemical added to the standard database distributed with the code. The code costs 20,000 and requires a vendor supplied security key in the parallel port before use. 

The DIPPR databases were developed in the United States by the Design Institute for Physical Properties of the American Institute of Chemical Engineers. The DIPPR projects are aimed at providing evaluated process design data for the design of chemical processes and equipment (www.aiche.org/dippr/projects.htm). The Project 801 has been made available to university departments see Rowley et al. (2004) and http.//dippr.byu. edu/description/htm. 

The ideal-gas standard state heat of reaction is -42.1 kcal/mol of vinyl acetate for ri and -316 kcal/mol of ethylene for r,. These values are calculated from ideal-gas heats of formation from the DIPPR database. Thus the reactions are quite exothermic, particularly the combustion reaction to carbon dioxide, which also is more sensitive to temperature because of the higher activation energy. 

Table 11.2 shows the pure component physical property data, which were obtained from the DIPPR database. These data include the molecular weight MW, the liquid specific gravity (relative to the density of... 

This equation is based on the assumption of a helium flow saturated by the COV. P at-voc are calculated from a correlation based on the DIPPR database. The validity of this correlation in the low pressure domain has been checked by comparison with experimental data from Mokbel et al [10]. Discrepancies between the two series are lower than 2%. 

DIPPR Data Compilation, Student DIPPR Database, PC-DOS Version, National Institute of Science and Tecluiology, Standard Reference Data,... 

Knotts TA, Wilding WV, Oscarson JL et al. (2001) Use of the DIPPR database for development of QSPR correlations surface tension. J Chem Eng Data 46 1007-1012... 

W or educational purposes and to gain some experience with thermochemical databases, you may wish to try the Design Institute for Physical Property Data (DIPPR) database. A web-based student version of the database provides students with access to data for 100 common compounds at no charge http //dippr.byu.edu/ students/chemsearch,asp. The list of included compounds is available at http //di ppr,byu.edu/StudentlOO,txt. 

DIPPR Database of Pure Compound Properties, Design Institute for Physical Properties Data, American Institute of Chemical Engineers, New York, 1987. 

The ratio MiRTVA p H is called the ebulliometric constant. For the determination of solvent activities from ebulliometric data, tabulated ebulliometric constants should not be used, however. On the other side, it is sometimes recommended to use reference solutes to establish an experimental relationship for the equipment in use, i.e., unprecise data for the enthalpy of vaporization or perhaps some non-equilibrium effects cancel out of the calculation. Enthalpies of vaporization are provided by several data collections, e.g., by Maj er and Svoboda, or through the DIPPR database. 

T. E. Daubert, R. P. Danner, Physical and Thermodynamic Properties of Pure Chemicals. Data Compilation, Hemisphere Publ. Corp., New York, 1989 and several Supplements up to 1999, data are online available from DIPPR database. 

The WAR package supplements the DIPPR (Design Institute for Physical Property Research) Database of 1,685 chemicals with eight categories of human health and environmental impact data. Data not available for chemicals in this DIPPR database were estimated using molecular methods, such as QSAR (Quantitative Structural Activity Relationships). In order to consider each risk category, the potential environmental impact (Ti ) for a chemical can be determined by summing the specific environmental impacts of chemical ... 

This method for solvent selection is particularly useful, because it avoids the need for direct liquid-liquid measurements and it makes use of the existing databases of solvent infinite dilution activity coefficients, which is quite large (e.g., the DECHEMA and DIPPR databases ). 

The experimental surface tensions of many common liquids are available in the open literature or in critical compilations such as the DIPPR database [27]. From these total surface tensions, one may then obtain the partial surface tensions by using the preceding set of simple equations. Equation 11.13 should be used first in order to obtain y. The value of factor u, however, has not been specified yet. 

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