Abstract: A process for the production of propylene from an olefinic feedstock containing at least one olefin of C4 or greater, the process comprising contacting the olefinic feedstock with a catalyst of the MFI-type having a silicon/aluminum atomic ratio of at least about 180 to produce an effluent containing propylene, the propylene yield on an olefin basis being from 30 to 50k based on the olefinic content of the feedstock.

Abstract: A process for the production of olefins by catalytic cracking, the process comprising feeding a hydrocarbon feedstock containing at least one olefin of C4 or greater over a MFI-type crystalline silicate catalyst to produce an effluent containing at least one olefin of C2 or greater by catalytic cracking which is selective towards light olefins in the effluent, whereby for increasing the catalyst stability by limiting formation of coke thereon during the cracking process the catalyst has a silicon/aluminum atomic ratio of at least about 180, the olefin partial pressure is from 0.1 to 2 bars, and the feedstock contacts the catalyst at an inlet temperature of from 500 to 600° C.

Abstract: A synthetic ester-containing lubricant with good soot-handling and, with friction modifier, viscosity modifier and antioxidant present, improved engine performance and cleanliness.

Abstract: A synthetic ester-containing lubricant with good soot-handling and, with friction modifier, viscosity modifier and antioxidant present, improved engine performance and cleanliness.

Abstract: A process for the catalytic cracking of an olefin-containing feedstock which is selective towards light olefins in the effluent, the process comprising contacting a hydrocarbon feedstock containing at least one olefin with a MFI-type crystalline silicate catalyst having a silicon/aluminum atomic ratio of at least about 180, which has been obtained by pretreating so as to increase the silicon/aluminum atomic ratio thereof by heating the catalyst in steam and de-aluminating the catalyst by treating the catalyst with a complexing agent for aluminum, at an inlet temperature of from 500 to 600° C. and at an olefin partial pressure of from 0.1 to 2 bars to produce an effluent with an olefin content of lower molecular weight than that of the feedstock.

Abstract: A process for the catalytic cracking of at least one olefin in an olefinic stream containing impurities, the cracking process being selective towards light olefins in the effluent, the process comprising contacting a feedstock olefinic stream containing at least one sulphur-, nitrogen- and/or oxygen-derivative impurity with a crystalline silicate catalyst of the MFI-type, the catalyst having a silicon/aluminum atomic ratio of at least about 180, to produce an effluent stream having substantially the same olefinic content by weight as, but a different olefin distribution than, the feedstock stream.

Abstract: Bituminous compositions modified with self-adhesive cold-application polymers generally used for manufacturing of watertight roofing panels, said compositions comprising a mixture containing a rubbery styrene-diene polymeric mixture, one or more tackifying resins, and bitumen.

Abstract: High-solids air-drying or semi-drying alkyd paints essentially comprise, as binder, a conventional air-drying or semi-drying long-oil or medium-oil alkyd resin, and as reactive diluent an oligomer of polyol, polyisocyanate and unsaturated fatty acids. Use of the oligomer as reactive diluent is also claimed.

Abstract: Process for reducing the wax content of wax-containing hydrocarbon feedstocks to produce middle distillate products including low freeze point jet fuel and/or low pour point and low cloud point diesel fuel and heating oil. The process involves contacting the feedstock with a hydrocracking catalyst containing a carrier, at least one hydrogenation metal component of Group VIB and Group VIII metals, and a large pore zeolite such as a Y type zeolite, in a hydrocracking zone in the presence of hydrogen at elevated temperature and pressure, and contacting the entire effluent from the hydrocracking zone with a dewaxing catalyst containing a crystalline, intermediate pore size molecular sieve selected from metallosilicates and silicoaluminophosphates in a hydrodewaxing zone in the presence of hydrogen at elevated temperature and pressure.

Abstract: Medium-chain olefins containing as impurities 2-alkyl substituted isomers having a close boiling point are purified by (i) passing over a solid acid catalyst under mild conditions to selectively double-bond isomerise said impurities, and (ii) separating said isomerised olefins by distillation.

Abstract: Yeast cells whose DNA has been appropriately engineered to produce and to secrete lysozyme under control of a regulatable promoter are grown in the substantial absence of lysozyme synthesis and then are induced to produce and to secrete lysozyme under growth-limited conditions. This process is particularly suitable for the production of human lysozyme or mutants thereof.

Abstract: The invention is directed to a process for the transesterification of carboxylic acid esters, in which process a catalyst is used which is substantially insoluble in the reaction mixture under reaction conditions, said catalyst comprising at least one silicate of the Group IVB elements of the Periodic Table as the active component.

Abstract: Process for producing gasolines having improved RON and MON which consists in subjecting the LCO, HCO and CLO obtained by catalytic cracking of a heavy hydrocarbon feedstock, to a hydrogenation treatment and subjecting the obtained products to a new catalytic cracking and then recovering hydrocarbons boiling in the range of gasolines.

Abstract: A single-step process for the conversion of polysaccharides to polyhydric alcohols by hydrogenation at high pressure and temperature in the presence of a catalyst comprising (i) a supported metal selected from ruthenium, copper, nickel, cobalt and their mixtures, the metal being highly dispersed on the support so as to be capable of adsorbing more than 0.58 molecules of CO per atom of metal, and (ii) a solid having acidic functions, which may or may not be identical to the support, the solid having sufficient acid functions so that the rate constant of hydrolysis of sucrose on the catalyst is greater than 70% of the rate constant of hydrogenation of glucose on the catalyst. The process gives substantially pure polyhydric alcohols in a single step.