摘要:
Disclosed and claimed is a process for selectively separating hydrogen halides from sulfur-dioxide-containing gases by using an adsorbent made from a porous ceramic support material which is impregnated with an alkaline earth metal salt solution and, after evaporation of the solvent, the alkaline earth metal salt is pyrolysed at 200.degree. to 800.degree. C. to give alkaline earth metal oxide .Xh.sub.2 O, where x is a number from 0 to 1.
摘要:
In a supported catalyst for the preparation of monocarboxylic anhydrides by carbonylation of the appropriate esters or ethers, where, in the supported catalyst, an organosilicon compound is bonded, as a polyfunctional coupling agent, on the one hand to a support material and on the other hand to a noble-metal compound from group VIII of the Periodic Table of the Elements, the coupling agent is a chelate-forming organosilicon compound of the general formula ##STR1## where X=Cl, Br or --OR.sup.2 ;Y=--NR.sub.2.sup.4, a nitrogen-containing aryl radical, --PR.sub.2.sup.4, AsR.sub.2.sup.4, --SR.sup.4 or --SH;Z=zero, arylene or phenylene (optionally ortho-, meta- or para-substituted),R.sup.1 =C.sub.1 to C.sub.5 -alkyl;R.sup.2 =C.sub.1 to C.sub.5 -alkyl or --C.sub.6 H.sub.5 ;R.sup.3 =--H or C.sub.1 to C.sub.3 -alkyl;R.sup.4 =C.sub.1 to C.sub.6 -alkyl, C.sub.5 or C.sub.6 -cycloalkyl or --C.sub.6 H.sub.5 or --CH.sub.2 C.sub.6 H.sub.5, which are optionally substituted by halogen, methoxy, ethoxy or C.sub.1 to C.sub.3 -alkyl groups;n=0 or 1 or 2;m=2 to 6, preferably 2 to 4.
摘要翻译:在通过合适的酯或醚的羰基化制备单羧酸酐的负载型催化剂中,其中在负载型催化剂中有机硅化合物作为多官能偶联剂一方面结合到载体材料上,另一方面 由元素周期表第Ⅷ族赋予贵金属化合物,偶联剂是通式为(a)或(IMA)(b)的螯合形成有机硅化合物,其中X = Cl, Br或-OR2; Y = -NR24,含氮芳基,-PR24,AsR24,-SR4或-SH; Z =零,亚芳基或亚苯基(任选邻 - ,间 - 或对 - 取代),R1 = C1-C5-烷基; R2 = C1-C5-烷基或-C6H5; R3 = -H或C1至C3-烷基; R4 = C1至C6-烷基,C5或C6-环烷基或-C6H5或-CH2C6H5,其任选被卤素,甲氧基,乙氧基或C1至C3-烷基取代; n = 0或1或2; m = 2〜6,优选为2〜4。
摘要:
Monocarboxylic anhydrides of the general formula (RCO).sub.2 O are made by reacting a carboxylic acid ester or dialkylether of the general formulae RCOOR and ROR, respectively, in which R stands for one and the same alkyl radical having from 1-4 carbon atoms, with carbon monoxide in gas phase, in the presence of iodine or bromine or their compounds as a reaction promoter and also in the presence of a carrier-supported catalyst containing noble metal compounds of group VIII of the Periodic System, at temperatures of 130.degree.-400.degree. C. and under pressures of 1-150 bars. To this end, a novel carrier-supported catalyst is used in which the carrier material has a noble metal/chelate-compound formed of the noble metal compound and a chelator containing organonitrogen, organophosphorus, organoarsenic or organosulfur groups applied to it.
摘要:
Carrier-supported catalyst for making monocarboxylic anhydrides by subjecting a suitable ester or ether to carbonylation. The carrier supported catalyst has an organosilicon compound containing an alkoxy or halogen group and also an organonitrogen, organophosphorus, organoarsenic, organosulfur, mercapto or thioether group as a polyfunctional adhesion promoter additively combined with the carrier material on the one hand, and with the noble metal compound of the 8th subgroup of the Periodic System of the elements, on the other hand.
摘要:
The present invention relates to a method for the radical polymerization or copolymerization of ethylene at high pressures using a hydroxylamine ester as radical initiator. The hydroxylamine esters according to the invention are suitable initiators for the high pressure polymerization of ethylene leading to high molecular weight polyethylenes with narrow molecular weight distributions (Poyldispersity Index PD=1.2-4.5).
摘要:
The present invention concerns a process for the production of hydrogen peroxide by reacting a gas mixture which contains hydrogen and oxygen in an aqueous reaction medium containing less than 2% by volume liquid organic components and in the presence of a metallic catalyst which is characterized in that a palladium/gold alloy with 5 to 95 atom percent gold or a palladium/iridium or palladium/rhodium bimetal with 1 to 15 atom percent iridium or rhodium is used as the catalyst.
摘要:
The process for the preparation of monocarboxylic anhydrides of the general formula (RCO).sub.2 O is carried out by reacting a carboxylic ester or a dialkyl ether of the general formula RCOOR or ROR, in which R in each case denotes the same alkyl radical having 1 to 4 carbon atoms, with carbon monoxide in the gas phase in the presence of a supported catalyst. The reaction takes place by means of bromine or iodine or compounds thereof as reaction promoter. The support material in the catalyst supports a noble metal chelate compound which is formed by a noble metal compound from group VIII of the periodic table and a chelating agent containing organonitrogen, organophosphorus, organoarsenic, organosulfur or mercapto groups and substituted in its basic structure with alkyl, aryl or aralkyl groups. The reaction is carried out at temperatures from 130.degree. to 400.degree. C. and pressures from 1 to 150 bar.
摘要:
In the process for the preparation of monocarboxylic anhydrides of the general formula (RCO).sub.2 O by reacting a carboxylic acid ester of dialkyl ether of the general formula RCOOR or ROR, where R in each case denotes the same alkyl radical having 1 to 4 carbon atoms, with carbon monoxide in the gas phase in the presence of iodine or bromine or compounds thereof as reaction promoter, and in the presence of a supported catalyst, at temperatures of from 130.degree. to 400.degree. C. and pressures of from 1 to 150 bar, where, in the supported catalyst, an organosilicon compound is bonded, as a polyfunctional coupling agent, on the one hand to a support material and on the other hand to a noble-metal compound from group VIII of the Periodic Table, a chelate-forming organosilicon compound of the general formula ##STR1## is employed as the polyfunctional coupling agent, where X=Cl, Br or --OR.sup.2 ;Y=-NR.sub.2.sup.4, a nitrogen-containing aryl radical, --PR.sub.2.sup.4, AsR.sub.2.sup.4, --SR.sup.4 or --SH;Z=zero, arylene or phenylene (optionally ortho-, meta-or para-substituted),R.sup.1 =C.sub.1 to C.sub.5 -alkyl;R.sup.2 =C.sub.1 to C.sub.5 -alkyl or --C.sub.6 H.sub.5 ;R.sup.3 =--H or C.sub.1 to C.sub.3 -alkyl;R.sup.4 =C.sub.1 to C.sub.5 -alkyl, C.sub.5 or C.sub.6 -cycloalkyl or --C.sub.6 H.sub.5 or --CH.sub.2 C.sub.6 H.sub.5, which are optionally substutited by halogen, methoxy, ethoxy or C.sub.1 to C.sub.3 -alkyl groups;n=0 or 1 or 2;m=2 to 6, preferably 2 to 4.
摘要翻译:通过使通式RCOOR或ROR的二烷基醚的羧酸酯反应制备通式(RCO)2 O的一元羧酸酐的方法,其中每种情况下的R表示相同的具有1至4个碳原子的烷基 ,在碘或溴的存在下的气相中的一氧化碳或其化合物作为反应促进剂,并且在负载催化剂存在下,在130-400℃的温度和1-150巴的压力下 其中,在载体催化剂中,有机硅化合物作为多官能偶联剂一方面结合到载体材料上,另一方面与元素周期表第VIII族的贵金属化合物键合, 使用通式为“IMAGE”的有机硅化合物作为多官能偶联剂,其中X = Cl,Br或-OR2; Y = -NR24,含氮芳基,-PR24,AsR24,-SR4或-SH; Z =零,亚芳基或亚苯基(任选是邻位,间位或对位取代的),R1 = C1至C5-烷基; R2 = C1-C5-烷基或-C6H5; R3 = -H或C1-C3-烷基; R4 = C1至C5-烷基,C5或C6-环烷基或-C6H5或-CH2C6H5,其任选地被卤素,甲氧基,乙氧基或C1至C3-烷基取代; n = 0或1或2; m = 2〜6,优选为2〜4。
摘要:
Monocarboxylic anhydrides of the general formula (RCO).sub.2 O are made by reacting a carboxylic acid ester or dialkylether of the general formulae RCOOR and ROR, respectively, in which R stands for one and the same alkyl radical having from 1-4 carbon atoms, with carbon monoxide in gas phase, in the presence of iodine or bromine or their compounds as a reaction promoter and also in the presence of a carrier-supported catalyst containing noble metal compounds of group VIII of the Periodic System, at temperatures of 130.degree.-400.degree. C. and under pressures of 1-150 bars. To this end, a novel carrier-supported catalyst is used in which the carrier material has a noble metal/chelate-compound formed of the noble metal compound and a chelator containing organonitrogen, organophosphorus, organoarsenic or organosulfur groups applied to it.
摘要:
Disclosed is a catalyst system for the production of ethylene co-polymers by co-polymerisation of ethylene with further polymerisable monomers in the presence of a peroxide catalyst. The catalyst system contains components (A) and (B), component (A) being at least one organo-aluminium compound of the general formula AlR.sub.3, in which R is an alkyl, alkenyl, aryl, aralkyl or cycloalkyl radical, and component (B) is at least one organic peroxide.