III International Conference

PP-III-31synthesized. Experiments had been conducted in laboratory units of dawn-flow type with acatalyst charge of 15-30 cm 3 at temperatures in the range of 320-360 o C , space velocity0,75-1,0 h -1 , hydrogen pressure 4,0 MPa, hydrogen:feedstock ratio =1500 nm 3 / m 3 .The experiment resulted in a diesel fuel fraction with the cloud point ranging from minus34 o C to minus 44 o C, flash point in closed cup above 55 o C, cetane number minimum 47,yield – more then 90 %. These fractions are in compliance with GOST R 52368–2005 (EN590: 20040) requirements for fuels to be used in cold and arctic climatic zones. The results ofcomparative testing of zeolite–containing and amorphous catalysts are also presented in thereport.In order to obtain a diesel fuel component research was performed aimed at isomerizationof the C 14 – C 17 paraffinic fraction from the Parex process (T melting = plus 7 o C). It has beenfound that at P = 4,0 MPa, T = 270 – 370 o C, V sp = 0,5 – 0,75 hr -1 , H 2 : feed = 1500 nm 3 / m 3it is possible to obtain a diesel fuel component exhibiting the following properties: cloudpoint from minus 12 o C to minus 15 o C ; pour point from minus 14 o C to minus 18 o C , flashpoint 60 o C and 80 % yield, based on initial feedstock.The task of producing high–VI isoparaffinic base oils (VI > 130) complying with thegroup III quality requirement by API, capable of competing with synthetic oils of PAO(polyalphaolefins) type is very actual. Isoparaffinic oils are produced froma byproduct oflube oil solvent dewaxing – paraffinic fraction (slack wax) by means of combining thefollowing processes: hydrotreating, isomerization, isodewaxing and dehydrogenation.The experiments on isomerizing preliminarily hydrotreated slack wax to sulfur contentbelow 30 ppm and nitrogen content below 2 ppm with melting point in the range of+ 51 ÷ + 59 o C and lube oil fraction content ranging from 6,0 to 7,0 % have been performedon a specially developed catalyst. The tests have been conducted in a dawn-flow-type reactorin the 320 – 370 o C temperature range, space velocity of 0,5 hr –1 , hydrogen pressure 4,0MPa, hydrogen: feed ratio = 1500 nm 3 / m 3 .The catalysate yield amounted to 80 – 90 %, the melting point was in the range from+ 30 o C to minus 5 o C depending on the experimental conditions.To obtain oils with a pour point of minus 15 o C a second stage of the process is requiredto remove the residual linear paraffines from the slack wax.The report presents the results of testing using the method of solvent dewaxing, as well asdewaxing on new special purpose catalyst on the second stage. The use of this catalyst haspermitted to obtain an oil with a viscosity index exceeding 135, pour point minus 15 o C andyield of 55 %, based on feedstock, while producing primarily a diesel fraction as byproduct.527