METHOD FOR EFFICIENTLY PREPARING STYRENE BY MEANS OF SIDE CHAIN ALKYLATION OF TOLUENE AND METHANOL

WIPO Patent Application WO/2022/016500

A1

The present invention relates to a method for preparing styrene by means of the side chain alkylation of toluene and methanol. The method mainly solves the problems that in existing side chain alkylation technology of toluene and methanol, the selectivity of the styrene target product is low, the conversion rate of toluene is low, and the overall catalytic effect of the catalyst is poor, such that the technology of preparing styrene by means of the side chain alkylation of toluene and methanol cannot enter industrial application for a long time. In the present invention, toluene and methanol in a certain molar ratio are used as raw materials; by adding a certain amount of an alkaline reaction auxiliary agent before or during the reaction, under a certain reaction temperature and pressure, the raw materials and a catalyst are brought into continuous contact to perform reaction and conversion; and the styrene product is obtained at a high selectivity under the auxiliary action of the alkaline reaction auxiliary agent. By creating a new efficient reaction process, the method of the present invention efficiently solves the problem, in a breakthrough way, that in the process for preparing styrene by means of the side chain alkylation of toluene and methanol, the selectivity of the styrene product is low and improvement is difficult to achieve for a long time. In particular, the highest selectivity of styrene can reach 100%, so that the technical economy of the preparation of styrene by means of side chain alkylation technology of toluene and methanol meets industrial production application requirements.

JP7049361	Equipment and methods for producing para-xylene from methanol and / or dimethyl ether and toluene and co-producing lower olefins
JPH02188535	PRODUCTION OF OPTIONALLY SUBSTITUTED BENZYL-BENZENE

ZHU ZHIRONG (CN)
ZHAO GUOQING (CN)
HONG ZHE (CN)

PCT/CN2020/104085

January 27, 2022

July 24, 2020

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ZHEJIANG HUANHUA TECH CO LTD (CN)

C07C2/86; B01J29/08; B01J29/70; C07C15/46

WO2013162627A1	2013-10-31
WO2013162626A1	2013-10-31
WO2013162622A1	2013-10-31
WO2013162629A2	2013-10-31

BORGNA A, SEPOLVEDA J, MAGNI S, APESTEGUIA C: "Effect of the addition of acidic and basic compounds on the catalytic behavior of exchanged zeolites in the alkylation of toluene with methanol", CATALYSIS 1987 : SAN DIEGO, CA, MAY 17-22, 1987 NORTH AMERICAN MEETING OF THE CATALYSIS SOCIETY ; 10 (SAN DIEGO/CALIF.) : 1987.05.17-22, ELSEVIER BV, NL, vol. 130, 31 December 2000 (2000-12-31), NL , pages 2621 - 2626, XP055888977, ISSN: 0167-2991
BORGNA, A. SEPULVEDA, J. MAGNI, S.I. APESTEGUIA, C.R.: "Active sites in the alkylation of toluene with methanol: a study by selective acid-base poisoning", APPLIED CATALYSIS A: GENERAL, ELSEVIER, AMSTERDAM, NL, vol. 276, no. 1-2, 25 November 2004 (2004-11-25), AMSTERDAM, NL , pages 207 - 215, XP004613258, ISSN: 0926-860X, DOI: 10.1016/j.apcata.2004.08.007
BORGNA A., MAGNI S., SEPÚLVEDA J., APESTEGUÍA C.: "Selective acid-base poisoning on bifunctional alkylation reaction", STUDIES IN SURFACE SCIENCE AND CATALYSIS, vol. 139, 2 September 2007 (2007-09-02), NL , pages 213 - 220, XP009533605, ISSN: 0167-2991, DOI: 10.1016/S0167-2991(01)80200-7
XU JUN, YAN AIZHEN, XU QINHUA : "Side-chain Alkylation of Toluene With Methanolon B and K Modified KX Zeolites", RANLIAO HUAXUE XUEBAO - JOURNAL OF FUEL CHEMISTRY AND TECHNOLOGY, KEXUE CHUBANSHE, BEIJING, CN, vol. 27, no. 3, 30 June 1999 (1999-06-30), CN , XP055888986, ISSN: 0253-2409

BEIJING HUAREN UNITED INTELLECTUAL PROPERTY AGENCY CO., LTD et al. (CN)

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