• A ZieglerNatta catalyst, named after Karl Ziegler and Giulio Natta, is a catalyst used in the synthesis of polymers of 1-alkenes (alpha-olefins). Two...
    17 KB (1,843 words) - 11:43, 22 September 2024
  • Thumbnail for Giulio Natta
    Chemistry in 1963 with Karl Ziegler for work on high density polymers. He also received a Lomonosov Gold Medal in 1969. Natta was born in Imperia, Italy...
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  • Thumbnail for Karl Ziegler
    organometallic compounds, as well as the development of ZieglerNatta catalyst. One of many awards Ziegler received was the Werner von Siemens Ring in 1960 jointly...
    23 KB (2,670 words) - 09:18, 13 September 2024
  • in the 1950s with heterogeneous ZieglerNatta catalysts based on titanium tetrachloride and organoaluminium co-catalysts. The mixing of TiCl4 with trialkylaluminium...
    8 KB (858 words) - 16:55, 3 May 2023
  • including the traditional routes using Philips catalyst and traditional heterogeneous Ziegler-Natta catalysts, which still are used to produce the bulk of...
    8 KB (958 words) - 21:54, 26 June 2022
  • Thumbnail for Polypropylene
    made with two types of Ziegler-Natta catalysts. The first group of the catalysts encompasses solid (mostly supported) catalysts and certain types of soluble...
    50 KB (5,823 words) - 16:25, 19 November 2024
  • Thumbnail for High-density polyethylene
    lack of branching is ensured by an appropriate choice of catalyst (e.g., ZieglerNatta catalysts) and reaction conditions. HDPE is resistant to many different...
    15 KB (1,493 words) - 21:16, 29 August 2024
  • Thumbnail for Polyisoprene
    With ZieglerNatta catalyst TiCl4/Al(i-C4H9)3, a more pure cis-1,4-polyisoprene similar to natural rubber is formed. With ZieglerNatta catalyst VCl3/Al(i-C4H9)3...
    5 KB (502 words) - 19:27, 10 July 2024
  • Thumbnail for Kaminsky catalyst
    titanocene and related complexes emulated some aspects of these ZieglerNatta catalysts but with low activity. He subsequently found that high activity...
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  • Thumbnail for Phillips catalyst
    the reaction requires catalysts. Three main catalysts are employed commercially: the Phillips catalyst, ZieglerNatta catalysts (based on titanium trichloride)...
    3 KB (296 words) - 18:40, 18 July 2023
  • Thumbnail for Diethylaluminium chloride
    (C2H5)2AlCl, it exists as a dimer, [(C2H5)2AlCl]2 It is a precursor to Ziegler-Natta catalysts employed for the production of polyolefins. The compound is also...
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  • Thumbnail for Polyacetylene
    of the most common methods is via passing acetylene gas over a ZieglerNatta catalyst, such as Ti(OiPr)4/Al(C2H5)3. This method allows control over the...
    25 KB (2,605 words) - 15:04, 25 October 2024
  • States Ziegler House (Ketchikan, Alaska), NRHP-listed in Ketchikan Gateway Borough, Alaska, associated with A. H. and Bob Ziegler ZieglerNatta catalyst, chemical...
    6 KB (788 words) - 16:34, 6 September 2024
  • Thumbnail for Polybutadiene
    interest was renewed in the mid-1950s after the discovery of the ZieglerNatta catalyst. This method proved to be much better for tire manufacturing than...
    24 KB (2,997 words) - 18:36, 11 September 2024
  • platinum catalysts, the fuels must be free of sulfur and carbon monoxide, unless a desulfurization system is used. Ziegler-Natta catalysts for the production...
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  • stereoregularity of the polymerisation of alkenes using ZieglerNatta or metallocene catalysts. Stereoregularity is relevant for unsymmetrical alkenes...
    3 KB (337 words) - 00:20, 1 January 2020
  • with the development of technology for the manufacture of Ziegler-Natta polypropylene catalyst which is in use with Reliance Industries. He has authored...
    8 KB (651 words) - 11:33, 14 November 2024
  • Thumbnail for Organometallic chemistry
    bioorganometallic chemistry 1963 Nobel prize for Karl Ziegler and Giulio Natta on ZieglerNatta catalyst 1973 Nobel prize Geoffrey Wilkinson and Ernst Otto...
    31 KB (3,157 words) - 20:03, 24 September 2024
  • temperatures and pressures, via triethylaluminium and a ZieglerNatta catalyst; for this Ziegler took the 1963 Nobel Prize in Chemistry in March 1954, Karl...
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  • Thumbnail for Titanium
    titanium(III) chloride (TiCl3), which is used as a catalyst for production of polyolefins (see ZieglerNatta catalyst) and a reducing agent in organic chemistry...
    81 KB (8,933 words) - 08:21, 22 November 2024
  • chain-growth polymerization. In the presence of a suitable catalyst (typically a ZieglerNatta catalyst), propene will polymerize. There are multiple ways to...
    21 KB (1,979 words) - 10:40, 5 November 2024
  • common. MDPE can be produced by chromium/silica catalysts, Ziegler-Natta catalysts or metallocene catalysts. MDPE has good shock and drop resistance properties...
    3 KB (174 words) - 19:24, 8 October 2024
  • Scotland – steam hammer Giulio Natta (1903–1979), together with Karl Ziegler (1898–1973), Italy/Germany – ZieglerNatta catalyst William Neade (fl.1624–1637)...
    107 KB (12,077 words) - 15:11, 20 November 2024
  • Thumbnail for Acetylene
    and its ability to poison ZieglerNatta catalysts. It is selectively hydrogenated into ethylene, usually using Pd–Ag catalysts. The heaviest alkanes in...
    46 KB (4,391 words) - 12:11, 16 November 2024
  • Thumbnail for Branching (polymer chemistry)
    complications to be solved. If the ZieglerNatta catalyst was poisoned or damaged then the chain stopped growing. Also, ZieglerNatta monomers have to be small...
    10 KB (1,221 words) - 06:06, 20 October 2024
  • ZieglerNatta catalysts. Isotactic PB-1 is produced commercially using two types of heterogeneous ZieglerNatta catalysts. The first type of catalyst...
    19 KB (2,052 words) - 04:21, 9 October 2024
  • Thumbnail for Polyvinylcarbazole
    and potassium chromate as catalyst.  Alternatively, AIBN can also be used as a radical starter or a Ziegler-Natta catalyst. PVK can be used at temperatures...
    5 KB (451 words) - 08:35, 21 April 2024
  • Thumbnail for Catalyst support
    a catalyst support is a material, usually a solid with a high surface area, to which a catalyst is affixed. The activity of heterogeneous catalysts is...
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  • Thumbnail for Polyethylene
    most common catalysts consist of titanium(III) chloride, the so-called ZieglerNatta catalysts. Another common catalyst is the Phillips catalyst, prepared...
    57 KB (6,215 words) - 15:24, 5 November 2024
  • metal-containing catalysts. The reaction is highly exothermic. Traditionally, Ziegler-Natta catalysts are used. Named after the Nobelists Karl Ziegler and Giulio...
    16 KB (1,815 words) - 20:05, 22 September 2024