Abstract:
A process is proposed for the preparation of a powder comprising one or more derivatives of glycine-N,N-diacetic acid and/or one or more derivatives of glutamine-N,N-diacetic acid with a degree of crystallinity of a ≧30%, starting from an aqueous solution comprising the one or more derivatives of glycine-N,N-diacetic acid and/or the one or more derivatives of glutamine-N,N-diacetic acid in a concentration range from 20 to 60% by weight, based on the total weight of the aqueous solution, where the aqueous solution is concentrated in a first process step in an evaporator with rotating internals, which are arranged at a distance relative to the inside wall of the evaporator of ≦1% of the diameter of the evaporator, to give a crystal slurry with a solids concentration in the range from 60 to 85% by weight, based on the total weight of the crystal slurry, and where in a second process step the crystal slurry is left to ripen in a paste bunker and then in a thin-film contact dryer, and where the residence time in the paste bunker and in the thin-film contact dryer is in total a ≧15 minutes.
Abstract:
The present invention relates to a process for producing composite materials formed from a) at least one inorganic or organometallic phase; and b) at least one organic polymer phase with aromatic or heteroaromatic structural units; comprising the homo- or copolymerization of at least one monomer of the formula I in which M is a metal or semimetal; R1, R2 may be the same or different and are each an Ar—C(Ra,Rb)— radical in which Ar is as defined in claim 1, or the R1Q and R2G radicals together are a radical of the formula A in which A is an aromatic or heteroaromatic ring fused to the double bond, m is 0, 1 or 2, and the R radicals may be the same or different and are as defined in claim 1; G, Q are each O, S or NH; Q is O, S or NH; and in which q, X, Y, R1′, R2′ are each as defined in claim 1; which comprises performing the polymerization of the monomers of the general formula I thermally in the absence or substantial absence of added catalysts.
Abstract:
The present invention relates to a novel crystalline modification of fipronil, to a process for the preparation of the same, to pesticidal and parasiticidal mixtures and compositions comprising said crystalline modification and to their use for combating pests and parasites.
Abstract:
A tin containing zeolitic material having an MWW-type framework structure (Sn-MWW), having a tin content of at most 2 weight-%, calculated as element and based on the weight of the Sn-MWW, and having an X-ray diffraction pattern comprising peaks at 2 theta diffraction angles of (6.6±0.1)°, (7.1±0.1)°, and (7.9±0.1)°.
Abstract:
The present invention relates to a process for producing a composite material composed of a) at least one oxidic phase and b) an organic polymer phase. The copolymerization of at least one compound of the formula I [(ArO)mMOnRrHp]q (I) in which M is B, Al, Ga, In, Si, Ge, Sn, P, As or Sb, Ar is phenyl or naphthyl, R is alkyl, alkenyl, cycloalkyl or aryl, where aryl is unsubstituted or may have one or more substituents, with formaldehyde or formaldehyde equivalents, in a reaction medium which is essentially anhydrous, to obtain a composite material having an arrangement of phase domains similar to those nanocomposite materials obtainable by twin polymerization, and to the use of the composite material for production of gas storage materials, rubber mixtures, low-K dielectrics and electrode materials for lithium ion batteries.
Abstract:
A process for producing a composite material comprising a) at least one (semi)metallic phase and b) at least one organic polymer phase, comprising the copolymerization of at least one aryloxy (semi)metallate and/or aryloxy ester of a nonmetal which forms oxo acids, the nonmetal being different than carbon and nitrogen, (compound I) with at least one ketone, formaldehyde and/or formaldehyde equivalent (compound II) in the presence of at least one (semi)metal compound which is not an aryloxy (semi)metallate, (compound III), where the weight of (semi)metal in compound III is at least 5% by weight based on the weight of compound I.
Abstract:
A process for producing geometric shaped catalyst bodies K whose active material is a multielement oxide of stoichiometry [Bi1WbOx]a[Mo12Z1cZ2dFeeZ3fZ4gZ5hOy]1, in which a finely divided oxide Bi1WbOx with the particle size d50A1 and, formed from element sources, a finely divided intimate mixture of stoichiometry Mo12Z1cZ2dFeeZ3fZ4gZ5h with the particle size d90A2 are mixed in a ratio of a:1, this mixture is used to form shaped bodies and these are treated thermally, where (d50A1)0.7·(d90A2)1.5·(a)−1≧820. A shaped catalyst body obtained by the process. A catalyst obtained by grinding the shaped catalyst body. A process for heterogeneously catalyzing the partial gas phase oxidation of an alkane, alkanol, alkanal and/or an alkenal of 3 to 6 carbon atoms using the catalyst.
Abstract translation:一种生产几何形状的催化剂体K的方法,其活性材料是化学计量[Bi1WbOx] a [Mo12Z1cZ2dFeeZ3fZ4gZ5hOy] 1的多元素氧化物,其中粒径为d50A1的细分的氧化物Bi1WbOx由元素源形成, 化学计量比的混合物Mo12Z1cZ2dFeeZ3fZ4gZ5h与粒径d90A2的混合比例为:1,该混合物用于形成成型体,热处理,其中(d50A1)0.7·(d90A2)1.5·(a)-1≧ 820。 通过该方法获得的成型催化剂体。 通过研磨成形催化剂体获得的催化剂。 使用该催化剂非均相催化烷烃,链烷醇,链烷烃和/或具有3至6个碳原子的烯烃的部分气相氧化的方法。
Abstract:
A process for producing geometric shaped catalyst bodies K whose active material is a multielement oxide of stoichiometry [Bi1WbOx]a[Mo12Z1cZ2dFeeZ3fZ4gZ5hOy]1, in which a finely divided oxide Bi1WbOx with the particle size d50A1 and, formed from element sources, a finely divided intimate mixture of stoichiometry Mo12Z1cZ2dFeeZ3fZ4gZ5h with the particle size d90A2 are mixed in a ratio of a:1, this mixture is used to form shaped bodies and these are treated thermally, where (d50A1)0.7·(d90A2)1.5·(a)−1≧820. A shaped catalyst body obtained by the process. A catalyst obtained by grinding the shaped catalyst body. A process for heterogeneously catalyzing the partial gas phase oxidation of an alkane, alkanol, alkanal and/or an alkenal of 3 to 6 carbon atoms using the catalyst.
Abstract:
The invention relates to a nickel hexaaluminate-comprising catalyst for reforming hydrocarbons, preferably methane, in the presence of carbon dioxide, which comprises hexaaluminate in a proportion in the range from 65 to 95% by weight, preferably from 70 to 90% by weight, and a crystalline, oxidic secondary phase selected from the group consisting of LaAlO3, SrAl2O4 and BaAl2O4 in the range from 5 to 35% by weight, preferably from 10 to 30% by weight. The BET surface area of the catalyst is ≧5 m2/g, preferably ≧10 m2/g. The molar nickel content of the catalyst is ≦3 mol %, preferably ≦2.5 mol % and more preferably ≦2 mol %. The interlayer cations are preferably Ba and/or Sr. The process for producing the catalyst comprises the steps: (i) production of a mixture of metal salts, preferably nitrate salts of Ni and also Sr and/or La, and a nanoparticulate aluminum source, (ii) molding and (iii) calcination. The catalyst of the invention is brought into contact with hydrocarbons, preferably methane, and CO2 in a reforming process, preferably at a temperature of >800° C. The catalyst is also distinguished by structural and preferred properties of the nickel, namely that the nickel particles mostly have a tetragonal form and the particles have a size of ≦50 nm, preferably ≦40 nm and particularly preferably ≦30 nm, and are present finely dispersed as grown-on hexaaluminate particles. The catalyst has only a very low tendency for carbonaceous deposits to be formed.
Abstract:
A process for producing geometric shaped catalyst bodies K whose active material is a multielement oxide of stoichiometry [Bi1WbOx]a[Mo12Z1cZ2dFeeZ3fZ4gZ5hOy]1, in which a finely divided oxide Bi1WbOx with the particle size d50A1 and, formed from element sources, a finely divided intimate mixture of stoichiometry Mo12Z1cZ2dFeeZ3fZ4gZ5h with the particle size d90A2 are mixed in a ratio of a:1, this mixture is used to form shaped bodies and these are treated thermally, where (d50A1)0.7·(d90A2)1.5·(a)−1≧820. A shaped catalyst body obtained by the process. A catalyst obtained by grinding the shaped catalyst body. A process for heterogeneously catalyzing the partial gas phase oxidation of an alkane, alkanol, alkanal and/or an alkenal of 3 to 6 carbon atoms using the catalyst.
Abstract translation:一种生产几何形状的催化剂体K的方法,其活性材料是化学计量[Bi1WbOx] a [Mo12Z1cZ2dFeeZ3fZ4gZ5hOy] 1的多元素氧化物,其中粒径为d50A1的细分的氧化物Bi1WbOx由元素源形成, 化学计量比的混合物Mo12Z1cZ2dFeeZ3fZ4gZ5h与粒径d90A2的混合比例为:1,该混合物用于形成成型体,热处理,其中(d50A1)0.7·(d90A2)1.5·(a)-1≧ 820。 通过该方法获得的成型催化剂体。 通过研磨成形催化剂体获得的催化剂。 使用该催化剂非均相催化烷烃,链烷醇,链烷烃和/或具有3至6个碳原子的烯烃的部分气相氧化的方法。