China Petroleum Chemical Corporation

Fushun Research Institute of Petroleum and Petrochemicals, Sinopec Corp.

Dalian Research Institute of Petroleum and Petrochemicals, Sinopec Corp.

Sinopec Dalian Research Institute of Petroleum and Petrochemicals Co., Ltd.

Dalian Research Institute of Petroleum and Petrochemicals, Corp.

Kai Qiao

Shumei Zhang

Feng Zhou

Qingtong Zhai

Huixia Ma

Jie Su

Chunmei Wang

Xiangchen Fang

Ying Zhang

Xiuna Yang

Ping Jin

Shaozhong Peng

Shengzhong Zhang

Rui Jiang

Ming Gao

Changxin Guo

Yanpeng Zhang

Dequan Fan

Tianzuo Chen

Renqing Chu

Lianzhong Gou

Dan Guo

Ming Chen

Hao Guan

Quan Zhang

Huipeng Gao

Changhai Cao

A process for producing propylene involves dehydration of isopropanol. The dehydration process includes a step of subjecting a starting material containing isopropanol to a dehydration reaction in the presence of a dehydration catalyst comprising alumina to produce a product containing propylene. The starting material has a water content of 0.1 to 10.0 wt % (relative to 100 wt % of the total mass of the starting material), and the product has a total content of C2 unsaturated impurities and C3-C4 unsaturated impurities of 80 ppm or less (relative to 100 wt % of the total mass of the product).

Preparation method and production device for propylene

The present invention relates to a preparation process for a Cu-based catalyst and use of the Cu-based catalyst as the dehydrogenation catalyst in producing a hydroxyketone compound such as acetoin. Said Cu-based catalyst shows a high the acetoin selectivity as the dehydrogenation catalyst for producing acetoin.

Preparation process for Cu-based catalyst and use thereof

A separation device includes a membrane separation module (), an adsorption module (), and a gas intake module (). The membrane separation module includes a first housing (), and a membrane assembly () disposed in the first housing. The first housing has a first gas inlet (), a first gas outlet (), and a retentate gas outlet (). The membrane module has a permeate gas outlet, the permeate gas outlet being in communication with the first gas outlet. The adsorption module has a second housing () and an adsorbent layer () disposed in it. The second housing is disposed on the first housing and has a second gas inlet (), a second gas outlet (), and a desorption gas outlet (). The second gas inlet is in communication with the first gas outlet. The gas intake module has a third gas outlet () in communication with the first gas inlet.

Separation device and separation method

A system for producing needle coke and a method for producing needle coke using the system are provided. The system includes a coke tower, a pressure stabilization tower, a buffer tank and a coking fractionation tower. A pressure controller is provided at the top of the pressure stabilization tower for adjusting the pressure at the top thereof. An oil gas outlet of the coke tower is in communication with an oil gas inlet of the pressure stabilization tower through a pipeline. No pressure controller for adjusting the pressure at the top of the coke tower is provided in the coke tower or on the oil gas pipeline connecting the coke tower to the pressure stabilization tower.

System and method for producing needle coke

The present invention relates to a Cu-based catalyst, a preparation process thereof and its use as the dehydrogenation catalyst in producing a hydroxyketone compound such as acetoin. Said Cu-based catalyst contains copper, at least one auxiliary metal selected from metal of Group IIA, non-noble metal of Group VIII, metal of Group VIB, metal of Group VIIB, metal of Group IIB and lanthanide metal of periodic table of elements, and an alkali metal, and further contains at least one ketone additive selected from a ketone represented by formula (II) and a ketone represented by formula (II'). Said Cu-based catalyst shows a high the acetoin selectivity as the dehydrogenation catalyst for producing acetoin.R1-C(&#x2550;O)&#x2014;CH(OH)&#x2014;R2&#x2003;&#x2003;(II)R1-C(&#x2550;O)&#x2014;CH(&#x2550;O)&#x2014;R2&#x2003;&#x2003;(II&#x2032;) In formulae (II) and (II&#x2032;), each group is defined as in the description.

Cu-based catalyst, its preparation process and use thereof

The present invention relates to the field of isobutylene preparation. Disclosed are a catalyst and preparation method thereof, and method for preparing isobutylene by applying the same; the catalyst has a core-shell structure, the core an amorphous silica-alumina particle and/or an aggregate molding thereof, and the shell aluminum oxide comprising silicon and tin; the weight ratio of aluminum oxide comprising silicon and tin to amorphous silica-alumina is 1:60-1:3; in the aluminum oxide comprising silicon and tin, on basis of the weight of aluminum oxide comprising silicon and tin, the content of silicon is 0.5-2 wt %, and of tin is 0.2-1 wt %. The catalyst of the present invention is used to catalyze a mixture of MTBE and TBA to prepare isobutylene, enabling the MTBE cleavage and TBA dehydration reactions to be conducted simultaneously to generate isobutylene, achieving higher conversion rates of TBA and MTBE, and higher selectivity for generating isobutylene.

Catalyst and preparation method thereof, and method for preparing isobutylene by applying the same

Disclosed is a catalyst for preparing isobutene by dissociation of methyl tert-butyl ether, the catalyst comprising amorphous silica alumina and a silicalite-1 molecular sieve, wherein the total IR acid amount of weak acids in the catalyst is in a range from 0.020 to 0.080 mmol/g, and the ratio of B acid/L acid of the weak acids is in a range from 2.5:1 to 4.0:1. Also provided is a method of preparing the catalyst and the use thereof. The catalyst has a high selectivity with respect to isobutene, and high conversion of methyl tert-butyl ether, and can also effectively inhibit formation of the by-product dimethyl ether.

Catalyst for preparing isobutene by dissociation of methyl tert-butyl ether, preparation method and use thereof

Growing community of inventors

Liaoning, China

Kai Qiao