Abstract:
A process for the preparation of a fluid bed vinyl acetate (VAM) catalyst comprising impregnating a support comprising a mixture of substantially inert microspheroidal particles with a solution comprising a halide-free metal salt of Pd and M, wherein M comprises Ba, Au, La, Nb, Ce, Zn, Pb, Ca, Sr, Sb or mixtures thereof, reducing the metal salts to form a deposit of Pd and M on the support surface and impregnating the support with at least one halide-free alkali metal salt. At least 50% of the particles used for the microspheroidal support have a particle size below 100 microns, preferably below 60 microns. The pore volume of these particles is from 0.2 to 0.7cm³/g and the surface area is from 100 to 200 m²/g.
Abstract:
A process for the treatment of a hydrocarbon blend containing nitrogen-containing compounds to effect removal of a portion of the nitrogen-containing compounds therefrom comprising (a) providing a hydrocarbon blend containing nitrogen-containing compounds; (b) contacting the hydrocarbon blend with a solvent which is characterised by (i) a liquid phase density at 25°C not less than 0.90g/cm³ and (ii) a Hansen polar solubility parameter δ P , and a Hansen hydrogen bonding parameter δ H , such that at 25°C 9.0 (cal/cm³) ½ P + δ H ) ½ to remove at least a portion of the nitrogen-containing compounds to form a purified hydrocarbon mixture; and (c) separating the purified hydrocarbon blend from the solvent and the nitrogen-containing compounds.
Abstract translation:一种用于处理含有含氮化合物的烃共混物从而除去一部分含氮化合物的方法,包括(a)提供含有含氮化合物的烃共混物; (b)使烃共混物与溶剂接触,所述溶剂的特征在于:(i)25℃下的液相密度不小于0.90g / cm 3,和(ii)Hansen极性溶度参数δP和Hansen 氢键参数δH,使得在25℃下除去至少一部分含氮化合物以形成纯化的烃混合物; 和(c)从溶剂和含氮化合物中分离纯化的烃共混物。
Abstract:
Polymer blends having improved barrier properties comprising 85 to 99.5 weight percent polyolefin and 0.5 to 15 weight percent high nitrile polymer are disclosed. In addition, containers comprising 80 to 99.5 weight percent polyolefin and 0.5 to 20 weight percent high nitrile polymer are produced having improved barrier properties.
Abstract:
An endothermic reaction furnace (102) includes one or more elongated tubes (110) defining therein an endothermic reaction flow path and a combustion flow path for providing heat to drive the endothermic reaction. The combustion flow path is arranged so that fuel and combustion air are separately heated by the heat inside the furnace (102) to significantly above their autoignition temperature before being combined in a combustion zone (116) where they mix, autoignite and burn.
Abstract:
Disclosed is a method for ammoxidizing C₃ to C₅ mono-olefins to a,b-mono-unsaturated acyclic nitriles having 3 to 5 carbon atoms and HCN by introducing such mono-olefins molecular oxygen and ammonia into a reaction zone into vapor phase contact with a solid ammoxidation catalyst, wherein the mol ratio of introduced molecular oxygen and ammonia to said introduced mono-olefin is at least 1.5 and 1.0, respectively, wherein said catalyst contains the elements and proportions indicated by the empirical formula:
V₁Sb a M m N n O x
where
a = 0.5 to 2 M = one or more of: Sn, Ti, Fe, and Ga m = 0.05 to 3, usually at least 0.1 and at most 1 N = one or more of: W, Bi, Mo, Li, Mg, P, Zn, Mn, Te, Ge, Nb, Zr, Cr, Al, Cu, Ce, B n = 0.0 to 0.5, and wherein the preparation of the catalyst includes contacting in an aqueous dispersion a vanadium compound and an antimony compound while said vanadium is in solution.
Abstract translation:公开了一种通过将这样的单烯烃分子氧和氨引入到反应区与气相接触的方法,将C3至C5单烯烃氧化为具有3至5个碳原子的α-单不饱和非环状腈和HCN 固体氨氧化催化剂,其中引入的分子氧和氨与所述引入的单烯烃的摩尔比分别为至少1.5和1.0,其中所述催化剂含有元素和由经验式表示的比例:V1SbaMmNnOx其中a = 0.5至2 M = Sn,Ti,Fe和Ga中的一种或多种:m = 0.05〜3,通常为0.1以上且1N以下= W,Bi,Mo,Li,Mg,P,Zn, Mn,Te,Ge,Nb,Zr,Cr,Al,Cu,Ce,B n = 0.0〜0.5,其中催化剂的制备包括在水分散体中使钒化合物与锑化合物接触, 解。
Abstract:
Disclosed is a method of making a catalyst containing vanadium antimony and tin in the oxide state which comprises making an aqueous slurry of a mixture of source batch materials comprising compounds of the elements to be included in the final catalyst followed by drying and heat calcining the mixture to an active catalyst, using as the source batch material for tin a stannous salt of a C₁ to C₁₈ acyclic, monocarboxylic acid containing no ethylenic or acetylenic carbon-to-carbon unsaturation.