摘要:
A ship having a fuel tank adjacent the hull of the ship, in which the tank is provided with at least one oil-tight bulkhead, longitudinal with respect to the hull, which bulkhead dividers the tank into two or more discrete compartments, at least one compartment being adjacent the hull and at least one compartment being remote from the hull, each compartment being provided with pipework such that each of said compartments independently of each other can be filled with fuel and can provide fuel to the engine and/or boiler systems of the ship.
摘要:
A novel zeolite type material, designated SUZ-9 and suitable for use as an absorbent, catalyst or catalyst base, has, in its dehydrated organic free form, the empirical form m (M.sub.2/a O):X.sub.z O.sub.xz/2 :.sub.y YO.sub.2, where m is 0.5-1.5, M is an a valent cation; x is 2 or 3 and z is correspondingly 1 or 2; y is at least 2; X is Al, Ga, B, Zn or Fe; and Y is Si or Ge, and in its calcined hydrogen form an X-ray diffraction pattern including significant specified peaks.
摘要:
Novel membranes comprise crystals of a zeo-type material carried by a porous support. The crystal growth of the zeo-type material is essentially continuous over the pores of the support and the zeo-type material is crystallized directly from and bonds directly to the support. Membranes may be prepared by immersing the support in a synthesis gel, crystallizing the gel, removing the support, and repeating these steps at least once.
摘要:
A novel catalyst composition comprising a crystalline aluminosilicate having a molar ratio of silica to alumina of at least 5:1, the aluminosilicate carrying gallium and copper, is useful in the conversion at elevated temperature of a C.sub.2 -C.sub.12 hydrocarbon feedstock into aromatic hydrocarbons.
摘要:
A novel catalyst composition comprising a crystalline aluminosilicate having a molar ratio of silica to alumina of at least 5:1, the aluminosilicate carrying gallium and copper, is useful in the conversion at elevated temperature of a C.sub.2 -C.sub.12 hydrocarbon feedstock into aromatic hydrocarbons.
摘要:
A process for preparing polyketones (alternating polymers of carbon monoxide and one or more olefins) is provided. The process is characterized by using the nickel catalyst obtained by reacting a nickel compound, e.g. nickel acetate, nickel carbonyl or bis(cyclooctadiene) nickel(O), with a thiol-substituted carboxylic acid of formula HS--R--CO.sub.2 H (R is a divalent organic radical). Preferred thiol-substituted carboxylic acids include 2-mercaptobenzoic acid, 4-mercaptobenzoic acid, 2 mercaptonicotinic acid and compounds of formula HS--CHR.sup.2 --CO.sub.2 H where R.sup.2 is selected from hydrogen, --CH.sub.3 and --CH.sub.2 CO.sub.2 H.
摘要:
Paving composition comprising a blend of specified bitumen and high vinyl butadiene, substantially free of added sulphur or peroxide, with elastic recovery greater than 50%.
摘要:
This invention relates to a method of producing polymer composites comprising a polymeric matrix (Host) in which crystallites of organic and/or inorganic compounds (Guest) are grown in situ. The growth of crystals is achieved by a temperature gradient zone melting technique. The resultant crystals have high crystalline alignment, good transparency and high second harmonic generation activity.
摘要:
##STR1## Compounds having general formula (I) wherein (i) Cp is either a cyclopentadienyl ligand having the formula C 5 (R 3 ) 5 where the R 3 groups are independently hydrogen, methyl or ethyl or an indenyl ligand; (ii) Z is a ligand having the formula X(R 4 ) 2 (Y) wherein X is selected from phosphorus, arsenic or antimony; the R 4 groups are independently aryl or aroxy and Y is selected from --R 5 --NHR 5 and --OR 5 wherein R 5 is a hydrocarbyl group; (iii) the R groups are independently hydrogen, halogen or C 1 to C 4 alkyl; (iv) R 1 is selected from hydrogen, C 1 to C 6 alkyl, benzyl and --CO 2 R 6 where R 6 is C 1 to C 6 alkyl; (v) R 2 is selected from hydrogen, C 1 to C 10 alkyl, phenyl and benzyl, and (vi) B is either R or COY wherein Y is selected from --NHR 7 , --OR 7 and --SR 7 where R 7 is a hydrocarbyl group is provided. The compounds are efficient asymmetric hydrogenating agents for prochiral carbonyl containing compounds when used in single enantiomer form.
摘要:
Catalyst composition comprising an alloy of at least one noble metal of group VIII of the Periodic Table and at least one metal capable of alloying with the group VIII noble metal, admixed with a component comprising at least one of the metals rhenium, tungsten or molybdenum, used for producing an alcohol and/or a carboxylic acid ester by reacting hydrogen with a carboxylic acid or anhydride thereof.