Symyx Technologies, Inc. was a company that specialized in informatics and automation products. Symyx provided software solutions for scientific research, including Enterprise Laboratory Notebooks and products for combinatorial chemistry. The software part of the business became part of Accelrys, Inc. Symyx also offered laboratory robotics systems for performing automated chemical research, which on 2010, was spun out as Freeslate, Inc. Wikipedia.
Diamond G.M.,Rennovia |
Hall K.A.,Symyx |
Lapointe A.M.,Cornell University |
Leclerc M.K.,University of California at Berkeley |
And 3 more authors.
ACS Catalysis | Year: 2011
New nonmetallocene catalysts for the isospecific polymerization of propylene were discovered using high-throughput screening. These hafnium heteroaryl-amido catalysts are structural analogues of the highly successful hafnium pyridyl-amido catalysts. Initial primary and secondary screening of a library of five thiazole-amine ligands with Zr and Hf with propylene resulted in the discovery of highly active catalysts with high activity, high molecular weight capability, and stereoinduction that ranged from low to high, depending on the ligand and activation conditions. Subsequent screening revealed that bulky aryl substituents at the N-aryl (R1), thiazole ortho position (R2) and the bridge position (R3) were preferred for high activity, although stereoinduction was lower than that observed for the pyridyl-amidos. The thiazole-amine catalysts containing a 2-methoxyphenyl substituent at R2 and activation conditions that included B(C 6F 5) 3 formed highly isotactic polypropylene with low catalyst activity. Subsequent complexation and reactivity studies revealed that in the presence of B(C 6F 5) 3 and trialkylaluminum reagent, demethylation of the bound ligand ether occurred, resulting in binding of the ligand in a tridentate [O -, N, N -] fashion. The resulting thiazole-amido phenoxide complex was prepared independently and is a highly stereospecific catalyst for the polymerization of propylene, although it exhibited low activity relative to the other thiazole-amido catalysts. This structural clue suggested that expansion of the ring formed upon orthometalation at the R2 position might be advantageous for stereocontrol. A library of imidazole-amine and thiazole-amines containing 2-methylbenzothiophene (2-MeBZT) and 2-ethylbenzofuran substituents (2-EtBZF) at R2 was prepared, complexed to Hf, and screened with propylene at 110 °C. Many of the catalysts showed high activity, high molecular weight capability, and very good stereoinduction. © 2011 American Chemical Society. Source
Dow Chemical Company and Symyx | Date: 2011-10-13
Metal complexes comprising certain polydentate heteroatom containing ligands, catalysts, and coordination polymerization processes employing the same are suitably employed to prepare polymers having desirable physical properties.
News Article | November 30, 2006
Symyx Technologies, of Santa Clara, said it has created an independent “spin-out” company to develop sensor technologies. The new company, Visyx Technologies (no Web site yet), will focus on developing sensors for the transportation and industrial markets, particularly for use in passenger, truck and off-road vehicles, Symyx said in a statement. Driving the deal was an investment in Visyx by CMEA Ventures, a San Francisco venture firm, which will own a majority of the company. Symyx contributed $400,000. Based on this investment and the transfer of sensor intellectual property rights to Visyx, Symyx owns 37 percent of the new company. Symyx has retained rights to apply the sensor technologies in certain pharmaceutical, chemical and refining applications, it said. This is the second company that Symyx has created to pursue internally developed technologies independently: In 2003, Symyx launched Ilypsa, a pharmaceutical company. Ilypsa has raised $46 million in financing from NLV Partners, 5AM Ventures, US Venture Partners, Johnson & Johnson Development Corporation and Delphi Ventures, the company said.
Symyx | Date: 2014-01-08
The field of the invention relates generally to a method for preparing very-high or ultra-high molecular weight polyethylene. More particularly, the present invention related to a method of preparing very-high or ultra-high molecular weight polyethylene using a supported catalyst comprising a support, an activator and a metal-ligand complex, as well as the catalyst itself. The present invention additionally relates to a method of using a supported catalyst comprising a support, an activator and co-supported metal-ligand complexes to obtain a bi-modal molecular weight distribution of polyethylene.
Grasselli R.K.,University of Delaware |
Lugmair C.G.,TU Munich |
Volpe Jr. A.F.,Symyx |
Andersson A.,Lund University |
Burrington J.D.,Lubrizol Corporation
Catalysis Today | Year: 2010
The selective doping of M1 and M2 phases for the selective oxidation of propane and propylene to acrylic acid (AA) was investigated. A series of catalytic materials for the oxidation of propane were prepared with the general precursor composition Mo 1V 0.31-Te 0.37Nb xP yO n. A first solution was prepared by dissolving ammonium heptamolybdate, ammonium vanadate, and telluric acid in water at 60°C. This solution was allowed to cool to room temperature. A second solution was prepared by dissolving niobic acid in oxalic acid at 60°C. The appropriate amount of the first solution, second solution, and phosphoric acid were mixed and then dried by rotary evaporation. Each catalyst was tested at four different space velocities, starting with the highest, at several reaction temperatures starting at the lowest temperature. Doping of crystalline M1 and M2 phases with P in selective oxidation of propane or propylene enhances significantly the desired AA yields at commercially relevant high hydrocarbon conversions. Source