Detail of "26519-91-5"

Reference

Synthetic ways of using pyrolysis by-products

Synthetic ways of using pyrolysis by-products. Taber, A. M.; Livshits, B. R.; Zelentsova, N. I.; Avrekh, G. L. (USSR). Zh. Vses. Khim. O-va., 22(1), 17-23 (Russian) 1977. CODEN: ZVKOA6. DOCUMENT TYPE: Journal; General Review CA Section: 51 (Fossil Fuels, Derivatives, and Related Products) The utilization of allene [463-49-0], pentadiene [41050-31-1], cyclopentadiene [542-92-7], and methylcyclopentadiene [26519-91-5] by-products from large plants pyrolyzing hydrocarbon feedstocks is reviewed with 45 refs.

Recovery of cyclopentadienes

Recovery of cyclopentadienes. (Maruzen Petrochemical Co., Ltd., Japan). Jpn. Kokai Tokkyo Koho JP 59080618 A2 10 May 1984 Showa, 7 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: C07C013-15; C07C004-22; C07C007-04. APPLICATION: JP 82-190968 29 Oct 1982. DOCUMENT TYPE: Patent CA Section: 45 (Industrial Organic Chemicals, Leather, Fats, and Waxes) Section cross-reference(s): 24, 51 A process includes withdrawing a liq. from the benzene-toluene-xylene distn. tower for a cracked gasoline fraction, thermal decompg. the liq. in a decompn. distn. tower at 170-230° for 10-200 min, returning the bottom liq. of the decompn. distn. to the bottom of the benzene-toluene-xylene distn. tower, transfering the product from the top of the decompn. distn. tower to a cyclopentadiene (I) [542-92-7] distn. tower, distg. at tower bottom temp. 160-230° and retention time 0.25-6 h to obtain I from the top and methylcyclopentadiene (II) [26519-91-5] from the bottom, and distg. II. Thus, 6000 g/h liq. contg. I dimer 3.4, II dimer 0.6, xylene 7.0, and heavy fraction fractions 89.0% was decompn. distd. at 3 kg/cm2 gage (tower top), 193° (tower top), and 220° (tower bottom) to give 330 g/h distillate contg. I 51.2, II 8.0, xylene 27.5, and heavy fractions 13.3%, which was distd. at 0.5 kg/cm2 gage (tower top), 50° (tower top), and 175° (tower bottom) to give 170 g/h 99.1% I.