- Process for preparing 3-glycidyloxypropyltrialkoxysilanes
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A process can prepare a 3-glycidyloxypropylalkoxysilane of formula (I), (R′)O—(CH2)3—Si(OR)3 (I), where R groups are independently a methyl or ethyl group and R′ represents an H2C(O)CHCH2— group. The process includes reacting (i) a functionalized alkene of formula (II), (R′)O—C3H5 (II), where R′ represents an H2C(O)CHCH2— group, with (ii) at least one hydroalkoxysilane of formula (III), HSi(OR)3 (III), where R groups are independently a methyl or ethyl group. The reacting takes place in the presence of (iii) a Karstedt catalyst or a catalyst having hexachloroplatinic acid as a homogeneous catalyst, and (iv) 2-ethylhexanoic acid, isononanoic acid, or both. The process further includes obtaining a product of the reacting.
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Paragraph 0139-0142; 0144-0153
(2019/02/24)
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- An Easily Accessed Nickel Nanoparticle Catalyst for Alkene Hydrosilylation with Tertiary Silanes
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The first efficient and non-precious nanoparticle catalyst for alkene hydrosilylation with commercially relevant tertiary silanes has been developed. The nickel nanoparticle catalyst was prepared in situ from a simple nickel alkoxide precatalyst Ni(OtBu)2?x KCl. The catalyst exhibits high activity for anti-Markovnikov hydrosilylation of unactivated terminal alkenes and isomerizing hydrosilylation of internal alkenes. The catalyst can be applied to synthesize a single terminal alkyl silane from a mixture of internal and terminal alkene isomers, and to remotely functionalize an internal alkene derived from a fatty acid.
- Buslov, Ivan,Song, Fang,Hu, Xile
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supporting information
p. 12295 - 12299
(2016/10/13)
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- Method for preparing organic silicon by passage reaction device
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The invention provides a method for preparing organic silicon by a passage reaction device. Under the condition of main catalysts Z, hydrogen-containing silane X and an unsaturated compound Y are introduced into the passage reaction device; hydrosilylation reaction is performed to prepare the organic silicon, wherein the hydrogen-containing silane X has the structure being HSiRR'Cl, in the formula, R and R' are independently C1 to C16 alkyl or alkoxy; a=1, 2 or 3; b, c and d are respectively and independently 0, 1, 2 or 3; the unsaturated compound Y is a monoene compound or single-alkyne compound; the main catalysts Z are one or several mixed ones of single-component complexes or multi-component complexes of Pt, Pd, Rh, Ru, Cu, Ag, Au or Ir; the passage surface in which reaction flow contacts is subjected to inactivation treatment by an activating agent Z. The problems of long reaction period, poor stability and the like of large-sized reaction equipment are solved; the problem that mixing, pre-reaction and afterreaction are separated and are performed in multi-unit equipment is solved.
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Paragraph 0049
(2016/10/17)
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- COSMETIC TREATMENT METHOD COMPRISING THE APPLICATION OF A COATING BASED ON AN AEROGEL COMPOSITION OF LOW BULK DENSITY
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The present invention relates to a cosmetic treatment method comprising the formation of a coating on keratin fibres characterized in that it comprises: 1) the preparation of an aerogel precursor composition comprising:—at least one organic solvent chosen from acetone, C1-C4 alcohols, C1-C6 alkanes, C1-C4 ethers, which may or may not be perfluorinated, and mixtures thereof and at least one precursor compound that contains:—at least one atom chosen from silicon, titanium, aluminium and zirconium,—at least one hydroxyl or alkoxy function directly attached to the atom chosen from silicon, titanium, aluminium and zirconium by an oxygen atom, and,—optionally an organic group directly attached to the atom chosen from silicon, titanium, aluminium and zirconium by a carbon atom, 2) the removal of the solvent or solvents resulting in the formation of an aerogel composition having a bulk density less than or equal to 0.35 g/cm3, 3) the application to the keratin fibres of the aerogel composition resulting from step 2) or of the aerogel precursor composition resulting from step 1). Advantageously, the molar ratio between the precursor compounds and the solvent is at most 1/20.
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Paragraph 0069
(2014/02/15)
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- SILICA PARTICLES COATED WITH BETA-CYCLODEXTRIN FOR THE REMOVAL OF EMERGING CONTAMINANTS FROM WASTEWATER
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Provided is a silica particle coated with β-cyclodextrin, wherein said cyclodextrin is attached to said silica particle via at least one crosslinking agent and/or at least one copolymer. Also provided are methods of removing contaminants from a flowing or stationary liquid phase comprising the step of contacting said liquid phase with the silica particle coated with β-cyclodextrin.
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- SATURATED N-HETEROCYCLIC CARBENE-LIGAND METAL COMPLEX DERIVATIVES, PREPARING METHOD THEREOF, AND PREPARING METHOD OF SILANE COMPOUND BY HYDROSILYLATION REACTION USING THE SAME AS CATALYST
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Provided are a saturated N-heterocyclic carbene-ligand metal complex derivative, a method for preparing the same, and a method for preparing a silane compound by hydrosilylation using the same as a catalyst. To describe in more detail, the metal complex derivative has a saturated N-heterocyclic carbene derivative and an olefin ligand at the same time. A silane compound is prepared by hydrosilylation in the presence of the metal complex derivative as a catalyst. The provided metal complex derivative of the present invention has superior stability during hydrosilylation reaction and is capable of effectively performing the hydrosilylation reaction at low temperature even with small quantity. Further, a product with superior regioselectivity may be obtained. In addition, after the hydrosilylation reaction is completed, the metal complex derivative may be recovered and recycled.
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Page/Page column 21
(2011/07/30)
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- SATURATED N-HETEROCYCLIC CARBENE-LIGAND METAL COMPLEX DERIVATIVES, PREPARING METHOD THEREOF, AND PREPARING METHOD OF SILANE COMPOUND BY HYDROSILYLATION REACTION USING THE SAME AS CATALYST
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Provided are a saturated N-heterocyclic carbene-ligand metal complex derivative, a method for preparing the same, and a method for preparing a silane compound by hydrosilylation using the same as a catalyst. To describe in more detail, the metal complex derivative has a saturated N-heterocyclic carbene derivative and an olefin ligand at the same time. A silane compound is prepared by hydrosilylation in the presence of the metal complex derivative as a catalyst. The provided metal complex derivative of the present invention has superior stability during hydrosilylation reaction and is capable of effectively performing the hydrosilylation reaction at low temperature even with small quantity. Further, a product with superior regioselectivity may be obtained. In addition, after the hydrosilylation reaction is completed, the metal complex derivative may be recovered and recycled.
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Page/Page column 12; 13
(2011/07/08)
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- PROCESS FOR PREPARING GLYCIDYLOXYALKYLTRIALKOXYSILANES
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The present invention relates to a process for preparing glycidyloxy-alkylalkoxysilanes of the general formula (I) (R″)O—CnH2nSi(R′)m(OR)3-m (I) in which R and R′ groups are each independently linear or branched alkyl groups having from 1 to 4 carbon atoms, n is 1, 2, 3, 4, 5, 6, 7 or 8 and m is 0, 1, 2 or 3, and R″ is an H2C(O)CH— or H2C(O)CHCH2— group, by reacting (i) a functionalized alkene of the general formula (II) (R″)O—CnH2n-1(II) in which R″ is an H2C(O)CH— or H2C(O)CHCH2— group and n is 1, 2, 3, 4, 5, 6, 7 or 8 with (ii) at least one hydroalkoxy-silane of the general formula (III) HSi(R′)m(OR)3-m (III) in which R and R′ groups are each independently linear or branched alkyl groups having from 1 to 4 carbon atoms and m is 0, 1, 2 or 3, in the presence (iii) of at least one homogeneous catalyst, (iv) of at least one solvent and/or of a diluent and (v) of at least one promoter.
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Page/Page column 3-4
(2010/03/02)
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- SYSTEM AND PROCESS FOR CONTINUOUS INDUSTRIAL PREPARATION OF 3-GLYCIDYLOXYPROPYLALKOXYSILANES
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The present invention relates to a system, to a reactor and to a process for continuous industrial performance of a reaction wherein allyl glycidyl ether A is reacted with an HSi compound B in the presence of a catalyst C and optionally of further assistants, and the system is based at least on the combination of reactants (3) for components A (1) and B (2), at least one multielement reactor (5) which in turn comprises at least two reactor units in the form of exchangeable pre-reactors (5.1) and at least one further reactor unit (5.3) connected downstream of the prereactors, and on a product workup (8).
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Page/Page column 6
(2010/07/04)
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- Process for preparing a hydrosilyation catalyst
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A process for preparing a hydrosilylation catalyst comprises dissolving chloroplatinic acid H2PtCl6 in an ether such as tetrahydrofuran, or an ester such as gamma-buryrolactone, containing at least 3 carbon atoms, and maintaining the resulting solution at a temperature of at least 30°C, preferably from 50° to 120 C.
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