Abstract:
The present invention describes a process for producing middle distillates from a paraffinic feed produced by Fischer-Tropsch synthesis and divided into two fractions, a light fraction, termed the cold condensate, and a heavy fraction, termed the waxes, comprising a) fractionating said cold condensate fraction into a gaseous C4− fraction and an intermediate fraction with an initial boiling point in the range 15° C. to 40° C. and an end point in the range 300° C. to 450° C.; b) passing the intermediate fraction over at least one ion exchange resin; eliminating at least a portion of the water from the effluent derived from step b); decontaminating said heavy fraction termed the waxes by passage over a guard bed; recombining the purified intermediate fraction and the effluent derived from step d) to obtain a purified C5+ fraction; f) hydrogenating the unsaturated compounds of the purified C5+ fraction; g) hydroisomerization/hydrocracking of the effluent derived from step f); h) separating and recycling unreacted hydrogen and light gases to the hydroisomerization/hydrocracking step; and distilling the effluent derived from step h).
Abstract:
A solid (i.e., heterogeneous) catalyst useful for preparing an alkylene glycol from the corresponding alkylene oxide as well as a process for the catalytic hydration of an alkylene oxide to an alkylene glycol utilizing such a catalyst are provided. The catalyst of the present invention is based on an ion exchange resin including polystyrene crosslinked with from about 2 to about 10 weight (wt.) % divinyl benzene. The ion exchange resin further includes quaternary ammonium groups or quaternary phosphonium groups. The process includes reacting water and an alkylene oxide in at least one reactor under conditions to form an alkylene glycol, wherein the at least one reactor includes a catalyst based on an ion exchange resin that includes polystyrene crosslinked with from about 2 to about 10 weight (wt.) % divinyl benzene.
Abstract:
When a disproportionated chlorosilane is to be produced by causing a starting material chlorosilane liquid to flow through a catalyst-packed layer which is packed with a weakly basic anion exchange resin as a disproportionation reaction catalyst to carry out a disproportionation reaction, before the disproportionation reaction is carried out, the disproportionation reaction catalyst is brought into contact with a processing gas obtained by diluting a chlorosilane with an inert gas to prevent the deterioration of the disproportionation reaction catalyst at the start of the reaction so as to carry out the disproportionation of the chlorosilane efficiently.
Abstract:
The present invention provides an ion-exchange resin catalyst, as a catalyst for preparing bisphenol from phenol compounds and ketone, which has a higher selectivity to bisphenol and a longer life time, as compared to a conventional ion-exchange resin, and a method for preparing the same.The present invention also provides a method for preparing bisphenol comprising reacting phenol compounds with ketone, wherein the modified acidic ion-exchange resin in which at least one kind of cationic compound selected from the following (a), (b), (c) and (d) ionically binds to an acidic functional group, is used as a catalyst: (a) a quaternary phosphonium ion, (b) a quaternary ammonium ion, (c) a bis(phosphoranylidene) ammonium ion, and (d) an N-substituted nitrogen-containing aromatic cation.
Abstract:
The instant invention generally provides polymer organoclay composite comprising a molecularly self-assembling material and an organoclay, and a process of making and an article comprising the polymer organoclay composite. The instant invention also generally provides a fiber comprising the polymer organoclay composite, and a process of fabricating and an article comprising the fiber
Abstract:
A solid (i.e., heterogeneous) catalyst useful for preparing an alkylene glycol from the corresponding alkylene oxide as well as a process for the catalytic hydration of an alkylene oxide to an alkylene glycol utilizing such a catalyst are provided. The catalyst of the present invention is based on an ion exchange resin including polystyrene crosslinked with from about 2 to about 10 weight (wt.) % divinyl benzene. The ion exchange resin further includes quaternary ammonium groups or quaternary phosphonium groups. The process includes reacting water and an alkylene oxide in at least one reactor under conditions to form an alkylene glycol, wherein the at least one reactor includes a catalyst based on an ion exchange resin that includes polystyrene crosslinked with from about 2 to about 10 weight (wt.) % divinyl benzene.
Abstract:
A process for the preparation of an alkylene carbonate, said process comprising contacting the corresponding alkylene oxide with carbon dioxide in the presence of a metal salt immobilised on a solid support, wherein the metal salt comprises a cation of a metal selected from those in the third period and group 2, the fourth period and groups 2 and 4 to 12, the fifth period and groups 2, 4 to 7, 12 and 14, and the sixth period and groups 2 and 4 to 6 of the periodic table according to IUPAC nomenclature, and an anion selected from anions of inorganic acids and organic acids, and wherein the solid support contains a quaternary ammonium, a quaternary phosphonium, a quaternary arsenonium, a quaternary stibonium, or a ternary sulfonium cation.
Abstract:
The present invention relates to heat-stable anion exchangers based on at least one aromatic monomer and at least one crosslinker having structural elements of the general formula (I) where Ak, Ak′, Ak″ are in each case independently of one another identically or differently a C1-C18-alkyl radical, n is an even number between 5 and 18, x+y=2 and X is Cl, Br, OH, HCO3, HSO4, ½ (SO4), ½ CO3, NO3, F, H2PO4, ½ HPO4, ⅓ PO4 with the result that these anion exchangers, preferably in the OH form, withstand a working temperature of at least 60° C., preferably of at least 80° C., over a relatively long time, a process for production thereof and also use thereof.
Abstract translation:本发明涉及基于至少一种芳族单体和至少一种具有通式(I)的结构元件的交联剂的热稳定阴离子交换剂,其中Ak,Ak',Ak“在每种情况下彼此独立地彼此独立地 或者不同的是C 1 -C 18 - 烷基,n是5至18之间的偶数,x + y = 2,X是Cl,Br,OH, HCO 3,HSO 4,½(SO 4 S),1/3 CO 3,NO 3, / SUB,F,H 2 PO 4,1/2 HPO 4,1/3 PO 4,和 结果是这些阴离子交换剂优选为OH形式,在相当长的时间内经受至少60℃,优选至少80℃的工作温度,其制备方法及其用途。
Abstract:
Methods of decontaminating water, catalysts therefor and methods of making catalysts for decontaminating water to neutralize contaminants including organic and non-organic contaminants, such as aromatic compounds and microorganisms, e.g. bacteria. A heterogeneous catalyst is formed by incubating a polymeric resin with a transition metal-salt solution, e.g. a CuSO4 solution. The contaminated water is treated by immersing the resulting heterogeneous catalyst in the contaminated water with hydrogen peroxide.
Abstract:
The invention provides and a highly-dispersed supported catalyst that has a reduced average particle size of catalytic metal particles and is also supported by a porous support material. A method of preparing a supported catalyst that can reduce the average particle size of catalytic metal particles supported by a support material includes first mixing a charged support material with a solution containing a polymer electrolyte having a charge opposite to that of the support material to adsorb the polymer electrolyte on the support material. Next, the support material having the polymer electrolyte adsorbed thereon is mixed with a solution containing a catalytic metal precursor ion having a charge opposite to that of the polymer electrolyte to adsorb the catalytic metal precursor ion on the support material having the polymer electrolyte adsorbed on it. Finally, the catalytic metal precursor ion adsorbed on the support material having the polymer electrolyte adsorbed thereon is reduced to a catalytic metal in a reducing solution.