1. A process for selectively preparing 2,4-dialkyl-1,5- dimethyl benzene which comprises reacting a Xylene feed stream comprising at least 80% meta-Xylene with 3 to 20 moles per mole of said xylene feed of an alkylating agent selected from the group consisting of propylene, butene-l and ...
Even more preferably, the molecular weight is less than about 700 grams per mole. The term “substituted,” as used herein, means that any one or more hydrogens on the designated atom is replaced with a selection from the indicated group, provided that the designated atom's normal valency...
than about 1.6 grams per cubic centimeter. This high density, of course, must be associated with a relatively small amount of free space within the crystal, which might be expected to result in more stable structures. This free space, however, is important as the locus of catalytic activity....
1-mole of Shell Epon 826, a liquid diglycidyl ether of bisphenol A having an epoxy equivalent of 180-188; in addition, for the ratio of 1/2 mol benzenephosphonic acid-melamine salt to one mol Epon 826, 10.25 g. DMP-30, tris(dimethylaminomethyl-phenol), was added per oxirane equivalent....
4-Hydroxy-6-methyl-2(1H)pyridone (10.7 grams; 0.1 mole) is suspended in a mixture of 300 milliliters of chloroform and 24.2 grams (0.2 mole) of triethylamine. The mixture is agitated at room temperature and 34.5 grams (0.2 mole) of benzenesulfonyl chloride is added while mixing continues....
To a solution of 1.05 grams (0.005 mol) of di-n-butyltindihydride in TMF (20 ml) was added 1.36 grams (0.005 mol) of di-n-butyltindichloride under nitrogen. The mixture was stirred at room temperature for 10 min. 1-Bromo-2-(prop-2-yne)benzene (1.75 grams, 0.009 mole) was added ...
Accordingly, when using either methyl acetate or dimethyl ether, the mole ratio of water to ester or ether is in the range of 1:1 to 10:1, but preferably in the range of 1:1 to 3:1. In the preparation of acetic acid, it is apparent that combinations of methanol, methyl ester, ...
6.36 grams zirconylacetate, and 14.36 grams hydrobromic (48% HBr) acid. Zr:Co:Mn:Br = 3.0:3.0:3.0:9.0 (milligram atoms/mole o-xylene of catalyst components) From the following mass balance: Materials charged: 1033.72 grams (not including air) 705.0 grams-Total oxygen consumed: 1738.72 grams...