Catalyst for ortho-alkylation

• Publisher: Elsevier Science
• Year: 2007
• Weight: 424 KB
• Volume: 2007
• Category: Article
• ISSN: 1351-4180
• DOI: 10.1016/s1351-4180(07)70293-3

✦ Synopsis

with hydrogen chloride gas over a lanthanum trichloride catalyst, yielding methyl chloride which is then converted to other compounds.

Chemical Week, 7 Mar 2007, 169 (8), 21 Silica with bimodal pore structure holds potential Tokuyama will develop more applications for porous silica that has bimodal pore structure: macropore and mesopore. The silica is based on the work of researchers at Ehime University with which Tokuyama is affiliated. It is formed by gelatinizing water glass or sodium silicate, immobilizing the macropores and then producing mesopores by adding organic material. The macropores are 0.5-10 microm in size and mesopores are between 1-15 nanometres, though their sizes can be controlled. Tokuyama is searching for the product that will lead to the enhancement in physical properties of catalysts. Materials with bimodal structures can have improved reaction speed and longer operating life. It would be useful in areas such as high performance liquid chromatography and microreactors.