Reference

Aromatic hydrocarbons formed from synthesis gas on catalysts containing high-silica zeolites

Aromatic hydrocarbons formed from synthesis gas on catalysts containing high-silica zeolites. Isagulyants, G. V.; Gitis, K. M.; Greish, A. A.; Markaryan, G. L. (Inst. Org. Khim., Moscow, USSR). Neftekhimiya, 23(6), 765-7 (Russian) 1983. CODEN: NEFTAH. ISSN: 0028-2421. DOCUMENT TYPE: Journal CA Section: 45 (Industrial Organic Chemicals, Leather, Fats, and Waxes) Section cross-reference(s): 25, 67 Passing of a synthesis gas (CO/H2 ratio 1:2) over HZSM-5 zeolite catalysts contg. Fe2O3, Fe2O3 + Cr2O3, Fe2O3-Cr2O3-ZnO, or CoO + Cr2O3 at 400° and space velocity 360-720 h -1 under pressure 2.5-7.5 MPa results mainly in the formation of C7-9 arom. hydrocarbons, m- and p-xylenes and pseudocumene [95-63-6] being predominant. Catalysts contg. Cr2O3 yield less PhMe [108-88-3] and more C9 arom. 1314-13-2 and 108-88-3 are just another two chemicals used in this study. hydrocarbons than catalysts without it. .

High green strength emulsion rubbers by the use of half esters of unsaturated dicarboxylic acids

High green strength emulsion rubbers by the use of half esters of unsaturated dicarboxylic acids. Jalics, George (Goodyear Tire and Rubber Co. , USA). Eur. Pat. Appl. EP 95996 A2 7 Dec 1983, 21 pp. DESIGNATED STATES: R: DE, FR, GB, IT. (English). (European Patent Organization). CODEN: EPXXDW. CLASS: IC: C08F236-04; C07C069-593. APPLICATION: EP 83-630090 20 May 1983. PRIORITY: US 82-382543 27 May 1982. DOCUMENT TYPE: Patent CA Section: 39 (Synthetic Elastomers and Natural Rubber) Section cross-reference(s): 23 A process for improving green strength of emulsion polymn.There are some reagents with their cas registry numbers 1314-13-2 and 7423-42-9 are used in this study. rubbers comprises copolymg. a monomer or monomers with 1-10 wt. parts per 100 parts monomer of dicarboxylic acid deriv. and compounding the copolymer with 1-5 parts of a divalent metallic compd. selected from the group of Zn, Mg, and Ca, wherein the deriv. is a half ester or a half amide. Thus, mono(2-ethylhexyl) maleate (I) [7423-42-9] was prepd. by esterification of maleic anhydride with 2-ethylhexanol at 140°. A butadiene-I copolymer was prepd. by copolymn. of 95.00 wt. parts butadiene with 5.0 wt. parts I in an aq. soln. in presence of catalysts and surfactants at 10°. The butadiene-I copolymer was compounded with carbon black 50, tackifier 4.75, processing oil 17.25, stearic acid .50, and ZnO 3. The compounded copolymer had 100% modulus 89-104 psi, 300% modulus 161-182 psi, 500% modulus 220-237 psi, strength to break 218-280 psi, and elongation to break 450-720%, compared with 44-54, 36-72, 83-102, 117-165, and 740-980, resp., for a control contg. 0% I. .