China Petroleum & Chemical Corporation

Shanghai Research Institute of Petrochemical Technology, Sinopec

Wanmin Wang

Juntao Liu

Weimin Yang

Lei Li

Linna Zhang

Fengxia Sun

Siqing Zhong

Jun Kuai

Yuhong Zhang

Siqin Li

Zhiyan Zhu

Yuanlin Cheng

Haifeng Song

A process for producing ethylene glycol includes contacting an oxalate with a fluidized bed catalyst under the following conditions: a reaction temperature of from about 170 to about 270&#xb0; C., a weight space velocity of oxalate of from about 0.2 to about 7 hours, a hydrogen/ester molar ratio of about 20&#x2dc;200:1, a reaction pressure of from about 1.5 to about 10 MPa, and a reaction temperature differenceT of from about 1 to about 15&#xb0; C. The fluidized bed catalyst includes: a) from about 5 to about 80 parts by weight of copper and the oxide thereof, b) from about 10 to about 90 parts by weight of at least one carrier selected from silica, molecular sieve or alumina, c) from about 0.01 to about 30 parts by weight of bismuth and tungsten metallic elements or the oxides thereof, or cerium and niobium metallic elements or the oxides thereof.

Method for producing ethylene glycol from oxalate through the fluidized bed catalytic reaction

The present invention discloses a process for the selective hydrogenation of phenylacetylene in the presence of styrene, comprising contacting a phenylacetylene and styrene-containing hydrocarbon fraction feedstock with a carbon-containing catalyst under hydrogenation reaction conditions, wherein the carbon-containing catalyst has a carbon content of from 0.02 to 8 wt % based on the weight of the catalyst.

Method for selective hydrogenation of phenylacetylene in the presence of styrene

A method for improving the quality of ethylene glycol products, which mainly solves the technical problem of low UV-light transmittance of the ethylene glycol products present in the prior art. The method successfully solves the problem by use of the technical solution wherein the ethylene glycol raw material and hydrogen are passed through a rotating packed bed reactor loaded with solid oxide catalyst at a temperature of about 20 to about 280&#xb0; C., a pressure of about 0.1 to about 4.0 MPa, a space velocity of about 0.2 to about 100.0 hrand a molar ratio of hydrogen to ethylene glycol of from about 0.01 to 40:1, and ethylene glycol is obtained after the reaction. The solid oxide catalyst is at least one of copper-based, nickel-based and palladium-based catalysts, and the rotation rate of the rotating packed bed reactor is about 300 to about 5000 rpm.

Method for improving the quality of ethylene glycol products

The present invention relates to a method for the production of ethylene glycol using a feedstock comprising an oxalate and a catalyst containing copper and/or a copper oxide, comprising contacting the feedstock with the catalyst in a reactor under the conditions of a temperature in the range from about 170 to about 270&#xb0; C., a weight hourly space velocity of the oxalate in the range from about 0.2 to about 5 h, a molar ratio of hydrogen to the oxalate in the range from about 40:1 to about 200:1 and a reaction pressure in the range from about 1.5 to about 10 MPa, to produce an effluent containing ethylene glycol, in which the reactor is a tube-array reactor using partitioned heat exchange and adopting outer and inner tubes configured in a double-tube structure to facilitate the heat exchange of the catalyst.

Method for the production of ethylene glycol

A process of producing oxalate by CO gas phase method includes the following steps: a) introducing nitrite salt, water and an inorganic acid first into a reactor I to produce a NO containing effluent I; and separating the resultant effluent to obtain the effluent II of NO; b) introducing the effluent II of NO, a C-Calkanol and oxygen into a reactor II to be subjected to the reaction, and separating the resultant effluent to obtain the effluent IV of C-Calkyl nitrites; c) introducing the effluent IV of C-Calkyl nitrites and a CO gas stream into a coupling reactor where they are reacted to produce a NO containing effluent VI. The reactor I and/or the reactor II are preferably rotating supergravity reactors. Therefore, the process is applicable to the industrial production of oxalate by CO gas phase method.

Process of producing oxalate by CO gas phase method

A process of producing C-Calkyl nitrite, comprising the following steps: a) firstly feeding nitrogen oxide and oxygen into Reactor I, contacting with an aluminosilicate catalyst, and reacting to produce an effluent I containing NOand unreacted NO; b) feeding the effluent I and C-Calkanol into Reactor II, and reacting to produce an effluent II containing C-Calkyl nitrite; and c) separating the effluent II containing C-Calkyl nitrite to obtain C-Calkyl nitrite; wherein reactor I is a fixed bed reactor, and Reactor II is a rotating high-gravity reactor; said nitrogen oxide in step a) is NO, or a mixed gas containing NO and one or more of NOand NO, wherein the molar number of NO is greater than that of NO, if any; and the molar ratio of NO in nitrogen oxide to oxygen is 4-25:1.

Process for producing C1-C4 alkyl nitrite

Provided are processes for producing an oxalate by coupling of CO in the presence of a nitrite, wherein two or more reaction zones in series are used, and at least a portion of the oxalate as reaction product is separated between the reaction zones, and/or the nitrite is fed stagewise. The processes described herein can effectively enhance the selectivity to the oxalate and the single-pass conversion of the feedstock.

Processes for producing an oxalate by coupling of CO

Provided are processes for producing ethylene glycol from oxalate(s), wherein two or more reaction zones in series are used, and oxalate feedstock is fed stagewise, or hydrogen feedstock and optionally a solvent are fed stagewise. The present processes achieve higher selectivity for the product and improved stability of catalysts.

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Shanghai, China

Wanmin Wang