摘要:
The present invention is related to a method for preparing an X-ray amorphous or weakly crystalline metal oxide fluoride of a composition represented by the formula Ma+ObFc comprising the steps of b) providing a precursor, whereby the precursor is a fluorinated metal compound having a composition which is represented by the formula Ma+F(a−d)BdLxb) converting the precursor into an metal oxide/hydroxide fluoride; and c) calcinating the metal oxide/hydroxide fluoride having the formula Ma+OcHfFc to generate the X-ray amorphous or weakly crystalline metal oxide fluoride of the formula Ma+ObFc, whereby M is selected from the group comprising metals of the first, second, third and fourth main group and any subgroup of the periodic table; B is a group or an anion which is selected from the group comprising alkoxide, enolates, alkyl, chloride, bromide, iodide, nitrate, and organic acid anions; B is preferably an alkoxy group; L is a solvent other than water; a is any integer of 1, 2, 3, 4, 5 or 6, preferably 2 or 3; and b and c are any numbers obeying the formula b/2+c=a, and c is 0.1b to 10b; d is a number between 0 and 0.8a, preferable between 0.1 and 0.3a; e is (a−c+f)/2; f is a number between 0 and (a−c); and x is between 0 and 6.
摘要翻译:本发明涉及一种制备由下式表示的组合物的X射线无定形或弱结晶金属氧化物氟化物的方法: c)包括以下步骤:b)提供前体,由此所述前体是具有由下式表示的组成的氟化金属化合物:(a) b)将前体转化为金属氧化物/氢氧化物氟化物; 和c)将具有下式的金属氧化物/氢氧化物氟化物煅烧:将式M a -O + 产生式M a O b O b C c C的X射线无定形或弱结晶金属氧化物氟化物,其中M选自 包括第一,第二,第三和第四主族的金属和周期表的任何亚组; B是选自醇盐,烯醇化物,烷基,氯化物,溴化物,碘化物,硝酸盐和有机酸阴离子的基团或阴离子; B优选为烷氧基; L是水以外的溶剂; a是1,2,3,4,5或6,优选2或3的整数; b和c是符合公式b / 2 + c = a的任何数字,c是0.1b〜10b; d是0和0.8a之间的数,优选在0.1和0.3a之间; e为(a-c + f)/ 2; f是0和(a-c)之间的数字; x在0和6之间。
摘要:
A catalyst and a method for selective hydrogenation of acetylene and dienes in light olefin feedstreams are provided. The catalyst retains higher activity and selectivity after regeneration than conventional selective hydrogenation catalysts. The catalyst contains a first component and a second component supported on an inorganic support. The inorganic support contains at least one salt or oxide of zirconium, a lanthanide, or an alkaline earth.
摘要:
The invention provides processes for the recovery of a catalyst which are to be applied to the reactions wherein boron trifluoride or a complex thereof is used as the catalyst, that is, (I) a process for the recovery of a catalyst which comprises using as the reaction solvent a solvent containing a hydrofluorocarbon compound and/or an oxygenic hydrofluorocarbon compound and, after the completion of the reaction, separating the reaction solvent from the reaction mixture; and (II) a process for the recovery of a catalyst which comprises extracting boron trifluoride or a complex thereof from the reaction mixture after the completion of the reaction by using a hydrofluorocarbon compound and/or an oxygenic hydrofluorocarbon compound as the extracting solvent. According to the processes, boron trifluoride or complexes thereof used as catalyst can be easily separated from the reaction mixtures and re-used.
摘要:
A process is disclosed for the manufacture of 1,1,1,3,3,3-hexafluoropropane (HFC-236fa) and at least one 1,1,1,2,3,3-hexafluoropropane (HFC-236ea) and 1,1,1,2,3,3,3-heptafluoropropane (HFC-227ea). The process involves (a) reacting HF, Cl2, and at least one halopropene of the formula CX3CCl═CX2 (where each X is independently F or Cl) to produce a product including both CF3CCl2CF3 and CF3CClFCClF2; (b) reacting CF3CCl2CF3 and CF3CClFCClF2 produced in (a) with hydrogen to produce a product comprising CF3CH2CF3 and at least one compound selected from the group consisting of CHF2CHFCF3, and CF3CHFCH3; and (c) recovering from the product produced in (b), CF3CH2CF3 and at least one compound selected from the group consisting of CHF2CHFCF3 and CF3CHFCF3. In (a), the CF3CCl2CF3 and CF3CClFCClF2 are produced in the presence of a chlorofluorination catalyst including a ZnCr2O4/crystalline α-chromium oxide composition, a ZnCr2O4/crystalline α-chromium oxide composition which has been treated with a fluorinating agent, a zinc halide/a-chromium oxide composition and/or a zinc halide/a-chromium oxide composition which has been treated with a fluorinating agent.
摘要:
A catalyst and a method for selective hydrogenation of acetylene and dienes in light olefin feedstreams are provided. The catalyst retains higher activity and selectivity after regeneration than conventional selective hydrogenation catalysts. The catalyst contains a first component and a second component supported on an inorganic support. The inorganic support contains at least one salt or oxide of zirconium, a lanthanide, or an alkaline earth.
摘要:
Processes of forming a supported activated catalyst composition and method of polymerization are disclosed, the process of forming the composition including combining a halogenated aromatic aluminum activator compound with a fluorinated support and a catalyst to form a supported activated catalyst composition. Also disclosed is a supported activated catalyst composition, comprising the reaction product of a fluorinated support, a perfluorophenyl aluminum activator and in one embodiment a metallocene catalyst. In one embodiment, the halogenated aromatic aluminum activator is represented by the formula RnAl(ArHal)3−n, wherein ArHal is a halogenated aryl group, R is a monoanionic ligand, and n is 1 or 2.
摘要:
Provided is a selective hydrogenation process for producing aminonitriles by contacting the corresponding dinitriles with a hydrogen-containing fluid in the presence of a hydrogenation catalyst, a solvent and an additive for improving the yield of and/or selectivity to the aminonitrile.
摘要:
A method of producing nano metal fluoride powders comprising the steps of mixing an aqueous or organic continuous phase comprising at least one metal cation salt with a hydrophilic or organic polymeric disperse phase forming a metal cation salt/polymer gel and then treating said gel with anhydrous hydrofluoric acid to convert said metal cation salt to metal cation fluoride and heat treating the gel at a temperature sufficient to drive off water and/or organics within the gel, leaving a residue of nano-size metal fluoride powder.
摘要:
A process is disclosed for producing the pentfluropropenes of the formula CF3CX═CF2, where X is H or Cl. The process involves hydrodehalogenating CF3CCl2CF3 with hydrogen at an elevated temperature in the vapor phase over a catalyst comprising an elemental metal, metal oxide, metal halide and/or metal oxyhalide (the metal being copper, nickel, chromium and the halogen of said halides and said oxyhalides being fluorine and/or chlorine. Processes for producing the hydrofluorocarbons CF3CH2CHF2, CF3CHFCF3 and CF3CH2CF3 are also disclosed which involve (a) hydrodehalogenating CF3CCl2CF3 with the hydrogen as indicated above to produce a product comprising CF3CCl═CF2, CF3CH═CF2, HCl and HF; and (b) either reacting the CF3CCl═CF2 and/or CF3CH═CF2 produced in (a) in the vapor phase with hydrogen to produce CF3CH2CHF2, reacting CF3CCl═CF2 produced in (a) with HF to produce CF3CHFCF3, or reacting the CF3CH═CF2produced in (a) with HF to produce CF3CH2CF3. Azeotrope compositions of CF3CHFCH3 with HF, and a process for recovering HF from a product mixture comprising HF and CF3CHFCF3 are also disclosed. Also disclosed are compositions and a process for producing compositions comprising (c1) CF3CHFCF3, CF3CH2CF3 or CHF2CH2CF3 and (c2) at least one saturated halogenated hydrocarbon and/or ether having the formula: CnH2n+2−a−bClaFbOc wherein n is an integer from 1 to 4, a is an integer from 0 to 2n+1, b is an integer from 1 to 2n+2−a, and c is 0 or 1, provided that when c is 1 then n is an integer from 2 to 4, and provided that component (c2) does not include the selected component (c1) compound, wherein the molar ratio of component (c2) to component (c1) is between about 1:99 and a molar ratio of HF to component (c1) in an azeotrope or azeotrope-like composition of component (c1) with HF. The process involves (A) combining (i) the azeotropic composition with (ii) the fluorination precursor to component (c2); and (B) reacting a sufficient amount of the HF from the azeotrope or azeotrope-like composition(i) with precursor component (ii) to provide a composition containing components (c1) and (c2) in the desired ratio. The compositions include at least two (c1) compounds, at least one of which is an ether.
摘要:
A process is disclosed for producing the pentafluoropropenes of the formula CF 3 CXnullCF 2 , where X is H or Cl. The process involves hydrodehalogenating CF 3 CCl 2 CF 3 with hydrogen at an elevated temperature in the vapor phase over a catalyst comprising an elemental metal, metal oxide, metal halide and/or metal oxyhalide (the metal being copper, nickel, chromium and the halogen of said halides and said oxyhalides being fluorine and/or chlorine). Processes for producing the hydrofluorocarbons CF 3 CH 2 CHF 2, CF 3 CHFCF 3 and CF 3 CH 2 CF 3 are also disclosed which involve (a) hydrodehalogenating CF 3 CCl 2 CF 3 with hydrogen as indicated above to produce a product comprising CF 3 CC1nullCF 2, CF 2 CHnullCF 2 , HCl and HF; and (b) either reacting the CF 3 CClnullCF 2 and/or CF 3 CHnullCF 2 produced in (a) in the vapor phase with hydrogen to produce CF 3 CH 2 CHF 2 reacting the CF 3 CC 1nullCF 2 produced in (a) with HF to produce CF 3 CHFCF 3, or reacting the CF 3 CHnullCF 2 produced in (a) with HF to produce CF 3 CH 2 CF 3 . Azeotrope compositions of CF 3 CHFCF 3 with HF, and a process for recovering HF from a product mixture comprising HF and CF 3 CHFCF 3 are also disclosed. Also disclosed are compositions and a process for producing compositions comprising (c1) CF 3 CHFCF 3 , CF 3 CH 2 CF 3 or CHF 2 CH 2 CF 3 and (c2) at least one saturated halogenated hydrocarbon and/or ether having the formula: C n H 2nnull2nullanullb Cl a F b O c wherein n is an integer from 1 to 4, a is an integer from 0 to 2nnull1, b is an integer from 1 to 2nnull2nulla, and c is 0 or 1, provided that hen c is 1 then n is an integer from 2 to 4 and provided that component (c2) does not include the selected component (c1) compound, wherein the molar ratio of component (c2) to component (c1) is between about 1:99 and a molar ratio of HF to component (c1) in an azeotrope or azeotrope-like composition of component (c1) with HF. The process involves (A) combining (i) the azeotropic composition with (ii) the fluorination precursor to component (c2); and (B) reacting a sufficient amount of the HF from the azeotrope or azeotrope-like composition (i) with precursor component (ii) to provide a composition containing components (c1) and (c2) in the desired ratio. The compositions include at least two (c1) compounds, at least one of which is an ether.