Short-contact-time 33% blend

HYDROPROCESSING OF 33% BLEND OF SHORT-CONTACT TIME SRC (Pressure 13790 kPa NiMo Catalyst)... 

One of the objectives of this work was to determine the effect of higher reactor pressure and space velocity on conversion and product quality. Heretofore, only temperature had been used to adjust or maintain conversion and product quality. Two different coal extract types were used in this study - namely, whole filter feeds obtained from Wilsonville short contact time coal extract (SCT) operations (Wilsonville run numbers 145 and 146 with 287 and 580 pounds of Indiana V coal feed per hour, respectively), and a conventional solvent refined coal (SRC-I)/ Koppers heavy residue creosote oil (KC-Oil) feed blend. The SRC-I was obtained from the Fort Lewis, Washington SRC-I facility... 

Short contact time SRC can be upgraded via catalytic hydroprocessing into low sulfur boiler fuels. However, the solid SCT SRC feedstock requires solvent dilution to reduce its viscosity. Furthermore, even for a 50 wt % W. Kentucky SCR SRC blend, all pilot unit lines and valves have to be heat-traced above 350°F in order to achieve smooth mechanical operations. 

When long residence time is not needed for chemical reaction or other purposes, small highly powered tank mixers may be suitable, with energy inputs measured in HP/gal rather than HP/1000 gal. They bring together several streams continuously for a short contact time (at most a second or two) and may be used whenever the effluent remains naturally blended for a sufficiently long time, that is, when a true solution is formed or a stable emulsion-like mixture. When it is essential that the mixing be immediate each stream will... 

Additional data are shown in Table II for fiirther commercially available cellulosic materials in a variety of formats, such as samples of pulp/polypropylene blends bonded to polypropylene backing, wood pulp alone, or treated cellulose in the form of utility wipes. Some of these materials were elements in the composition of diaper and incontinence pads. Yeasts, (Candida albicans), odor- generating bacteria Proteus mirabilis), and pathogens Staph aureus, E.coli) as well as MS-2 virus challenges all were killed to a very high degree after very short contact times, especially in comparison with commercially available antimicrobial preparations of comparable textile substrates. 

Port-type ted dessert wines require skin contact time to extract the anthocyanins, but the fermentation must be short to retain the sugar level neat the 6—10% level desired. The winemaker cannot always achieve desired composition in individual lots. In order to teach the desired standard, it is necessary to make new lots to enable blending to that standard. The right volume of a tedder, less sweet wine will need to be made to bring to standard a lot with low color and mote sugar, for example, while keeping the alcohol also within the desired limits. 

In the system shown in Fig. 2.3, blended oils and fats feedstocks are continuously and accurately metered into a pressurized, heated vessel, commonly referred to as an autoclave, along with the appropriate amount of caustic, water, and salt. The concentrations of these ingredients are adjusted to yield a mixture of neat soap and a lye phase. At the temperatures ( 120°C) and pressiues ( 200 kPa), the saponification reaction proceeds quickly (<30 min). A recirculation system ensures a residual level of soap in the autoclave to improve contact between the oil and water phases and provides additional mixing. After a relatively short resident time in the autoclave, the neat soap and lye phase reaction blend is pumped into a cooling mixer where the saponification reaction is completed and the reaction product... 

---