Proposal on “Use of LPG as Steam Cracking Feedstock” Raised by the Research Institute of Yangzi Petrochemical Company

The Research Institute of Yangzi Petrochemical Company (YPC) has completed the study on the project “Use of LPG as Steam Cracking Feedstock” and raised a rationalization proposal. The forecast has shown that the economic benefits for production of ethylene brought about by the hydrocracker LPG are enormous. Compared to the naphtha feedstock cur- rently used by YPC, the economic benefit for manufacturing one ton of ethylene from LPG can be higher by 800 RMB. If the annual consumpti…     

Yangzi Petrochemical Engaging in Development of Novel Co-catalyst for Oxidizing Paraxylene

The catalytic system for oxidizing para-xylene to pure tereph- thalic acid （PTA） is a major factor affecting the economic and technical level of the PTA unit, and all major PTA technology licensers keep completely confidential the oxidation-related process technology. Till now Chinese producers have not yet adopted the novel oxidation co-catalyst for manufacture of PTA. For this reason, SINOPEC has set up a project on R＆D of novel co-catalyst for oxidation of para-xylene, and the development work is jointly performed by the chemical plant subordinated to Yangzi Petrochemical Company （YPC） and YPC＇s Research Institute.     

Acceptance Examination of 650 kt/a Ethylene Revamp Project at Yangzi Petrochemical Company

Trial commissioning of 650 kt/a ethylene revamp project at Yangzi Petrochemical Company （YPC） for more then two years has shown that the project is designed reasonably, and the technology is advanced. The equipment operates satisfactorily. The service factor of environmental facilities reaches 100% to achieve production increase without increased pollutant emissions. In December 2004 this project had passed the acceptance test organized by SINOPEC.     

Acceptance Examination of 650 kt/a Ethylene Revamp Project at Yangzi Petrochemical Company

Trial commissioning of 650 kt/a ethylene revamp project at Yangzi Petrochemical Company (YPC) for more then two years has shown that the project is designed reasonably, and the technology is advanced. The equipment operates satisfactorily. The service factor of environmental facilities     

Yangzi Petrochemical Company Applies Catalytic Hydrotreating in EG Manufacture

正The important research project at Yangzi Petrochemical Co. (YPC) - a commercial unit for catalytic hydrogenation of ethylene glycol (EG) was successfully put on stream on November 3, 2011. Since commissioning of this unit the aldehyde removal effect has been satisfactory with the UV value of EG product exceeding that required for the premium grade to effectively tackle the problem for control over EG quality and solve the     

Commercial Application of CPP for Producing Ethylene and Propylene from Heavy Oil Feed

A new process named CPP (Catalytic Pyrolysis Process) for producing ethylene and propylene from heavy oil feedstock has been developed. The catalyst CEP was specially designed for this process, which has bi-functional catalytic activities for both carbonium ion reaction and free radical reaction, so as to maximize the yields of ethylene and propylene. The commercial trial showed that the yield of ethylene and propylene was 20.37% and 18.23% respectively in maximum ethylene operation with Daqing AR as feedstock, and the yield of ethylene and propylene was 9.77% and 24.60% respectively in maximum propylene operation by using the same feedstock.Compared with steam cracker, the feed cost of CPP is much lower for producing ethylene and propylene.     

Yangzi Petrochemical Utilizes the Pyrolysis C4 Resources to Expand Butene-1 and Butadiene Production Capacity

The C4 output at the Yangzi Petrochemical Company （YPC） has increased twofold after expansion of its ethylene unit to 650 kt/a from 300 kt/a. As the domestic demand for butene-1 is increasing, the Yangzi Petrochemical Company has expanded the capacity of the butene- 1 unit to 30 kt/a from 15 kt/a and had put on stream this revamped unit to deliver the qualified butene- 1 product.     

The Proposal for Revamp and Expansion of Ethylene Project at Guangzhou Petrochemical Complex Approved

The project for revamp of the ethylene unit at SINOPEC Guangzhou Petrochemical Branch Co. has been approved by the State Development and Reform Commission to expand the ethylene capacity from the current level of 200 kt/a to 800 kt/a. Completion of this revamp project will modify the current small ethylene capacity that cannot match the large refining capacity at Guangzhou Petrochemical Complex （GPC）.The 15 Mt/a refining capacity coupled with the 800 kt/a ethylene capacity can make the integration of oil refining and chemical production at GPC to optimize the product slate,     

The Proposal for Revamp and Expansion of Ethylene Project at Guangzhou Petrochemical Complex Approved

The project for revamp of the ethylene unit at SINOPEC Guangzhou Petrochemical Branch Co. has been approved by the State Development and Reform Commission to expand the ethylene capacity from the current level of 200 kt/a to 800 kt/a. Completion of this revamp project will modify the cur- rent small ethylene capacity that cannot match the large re- fining capacity at Guangzhou Petrochemical Complex (GPC). The 15 Mt/a refining capacity coupled with the 800 kt/a ethyl- ene capacity can m…     

Pilot Scale Testing of New Process for Synthesis of Ethylene Glycol at CAS Lanzhou Institute of Chemical Physics

The Chinese Academy of Sciences (CAS) Lanzhou Institute of Chemical Physics (LICP) has finished the development of the process for manufacture of ethylene glycol via synthesis of vinyl carbonate based on the reaction of ethylene oxide with carbon dioxide followed by trans-esterification of vinyl carbonate with methanol along with manufacture of the byproduct——dimethyl carbonate. Currently this process is undergoing the pilot testing and development phase. LICP to meet the demand of pol…     

Technology for Manufacture of DME through Two-step Methanol Dehydration/Catalytic Distillation Developed by Dalian Institute of Chemical Physics

The new 80 kt/a coal chemical unit at the Linhuan Coal Chemical Company in Anhui province will adopt the aromatics extraction process licensed by LyondellBasell Company. This unit is expected to come on stream by 2009. This technology is suitable for manufacture of high-purity aromatics with broad adaptability and large scale produc-tion capability. In the previous year LyondellBasell was awarded six patents on aromatics extraction process.     

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近年来,二甲醚作为重要化工原料及清洁燃料,进一步法合成技术发展迅速。与两步法相比,二甲醚一步法生产成本的降低为其使用范围的扩大奠定了基础。本文阐述了二甲醚一步法全两步法合成在热力学上的优势来源于多个化学反应同时进行所产生的协同效应。热力学上的优质直接导致了原料合成气转化率的提高。综述了两种一步法二甲醚合成技术（浆床合成技术和固定床合成技术）的发展情况。对以NKK和Haldor Topsφe A/S两公司为代表的这两种技术的进展及工业化进程进行了描述,还就这两种技术对合成气组成及造气工艺的不同要求进行了初步探讨。针对不同造气工艺的不同适应性,最后对不同市场需求情况下所宜采用的二甲醚生产一步法工业化方案进行了评述。     

Catalysis in the dispersed phase: Slurry technology in the synthesis of dimethyl ether (Review)

The world market of dimethyl ether (DME) is rapidly gaining in strength. The review addresses prospects for using the slurry technology in the large-scale world production of DME. The literature and patent data pertaining to the manufacture of dimethyl ether in slurry reactors using finely divided heterogeneous catalysts suspended in inert liquids are generalized. Variants of the slurry technology used in the one-step DME synthesis from syngas and in the two-step DME synthesis (at the stage of dimethyl ether manufacturing via methanol dehydration) are considered. Advantages of the slurry technology over the conventional gas-phase methods of DME production are highlighted.     

二甲醚及其应用技术分析

二甲醚具有环保性能好、性价比合理等优点，被誉为“二十一世纪的新能源”。其用作城镇燃气常见的方法有3种，即与液化石油气混合后装瓶；生产代天然气；用于小区管道气。二甲醚还可替代柴油作为车用燃料，生产气雾剂制品，用作制冷剂等，用途广泛。目前二甲醚生产工艺技术主要包括二步法和一步法两种，大型二甲醚制备基本采用一步法合成，这也是发展趋势，目前技术已日趋成熟。纵观国内外能源形势，在我国发展二甲醚等煤基醇醚燃料，符合产业政策，市场前景良好。建议组织制定相关标准规范，鼓励能源供应企业、汽车制造企业等参与二甲醚应用技术研发，尽早实行产业化，促进该行业稳步向前发展。     

浆态床合成二甲醚的研究

考察了合成甲醇催化剂和甲醇脱水催化剂对于浆态床合成二甲醚反应的影响。结果表明 ,甲醇合成催化剂对于CO转化率和二甲醚的选择性都有一定的影响。甲醇催化剂对于合成二甲醚反应的活性顺序为 :HY >γ Al2 O3 >Hβ >HZSM 5 ,反应结果结合NH3 TPD表征 ,认为甲醇脱水生成二甲醚的反应是以弱酸中心为活性中心 ,在强弱酸中心的协同作用下进行的     

浆态床反应器中含氮合成气合成二甲醚的研究

Cu ZnO Al2O3甲醇合成催化剂和HZSM 5分子筛通过机械混合制备了合成气直接合成二甲醚催化剂,并在浆态床反应器中进行了含氮合成气制二甲醚的研究,考察了各种工艺条件对二甲醚合成性能的影响。结果表明:转子转速、原料气空速、反应压力和温度均对催化剂的反应性能有影响。采用浆态床反应器合成二甲醚,可实现等温操作并可使反应热及时移出,从而避免催化剂床层形成热点,使催化剂失活减缓,但CO转化率和二甲醚选择性相对较低。采用浆态床反应器与固定床反应器集成技术,不仅可以解决催化剂床层形成热点问题,还可得到90%的CO转化率和75%的二甲醚选择性,并使催化剂保持高的稳定性,二甲醚收率为68%。     

STATISTICAL ANALYSIS OF REACTION RATE DATA OF LIQUID PHASE SYNTHESIS OF DIMETHYL ETHER FROM METHANOL

The liquid phase catalytic dehydration of methanol to dimethyl ether (DME) is a key reaction step in the single-step synthesis of DME from CO-rich syngas in a slurry reactor. The effect of process variables including temperature, pressure, impeller speed, and feed methanol flow rate on DME synthesis rate has been studied by a systematic 24 full factorial experimental design with single replicate. The significant effects and interactions have been quantified by F-tests. The estimates of significant effects have been obtained by Yates' algorithm. Residual probability and normal probability dots have been obtained to test model adequacy. Finally, a computational model has been developed to predict the DME synthesis rate alt various values of process variables. The model has excellent interpolational predictive capability as evidenced by parity plots.     

A SINGLE-STAGE,LIQUID-PHASE DIMETHYL ETHER SYNTHESIS PROCESS FROM SYNGAS II. COMPARISON OF PER-PASS SYNGAS CONVERSION,REACTOR PRODUCTIVITY AND HYDROGENATION EXTENT

ABSTRACT

In part I of this series on the development of a single-stage, liquid-phase dimethyl ether (DME) synthesis process from syngas, the process feasibility and the process variable effects on the dual catalyst activity were discussed. This part focuses on the comparison of the single-stage reactor productivity of liquid phase methanol synthesis to that of the co-production of methanol and DME. It is experimentally demonstrated that the single-stage reactor productivity for the co-production of methanol and DME could be as much as 60% higher than that for liquid phase methanol synthesis alone. Along with this, a 50% increase in the syngas conversion is also obtained. Further, this approach is shown to co-produce methanol and DME in any fixed proportion, ranging from 5% DME to 95% DME, at significant synthesis rates of DME.     

STATISTICAL ANALYSIS OF REACTION RATE DATA OF LIQUID PHASE SYNTHESIS OF DIMETHYL ETHER FROM METHANOL

Abstract

The liquid phase catalytic dehydration of methanol to dimethyl ether (DME) is a key reaction step in the single-step synthesis of DME from CO-rich syngas in a slurry reactor. The effect of process variables including temperature, pressure, impeller speed, and feed methanol flow rate on DME synthesis rate has been studied by a systematic 24 full factorial experimental design with single replicate. The significant effects and interactions have been quantified by F-tests. The estimates of significant effects have been obtained by Yates' algorithm. Residual probability and normal probability dots have been obtained to test model adequacy. Finally, a computational model has been developed to predict the DME synthesis rate alt various values of process variables. The model has excellent interpolational predictive capability as evidenced by parity plots.     

Large Scale Manufacture of Catalyst for Making DME Developed by Southwest Chemical Research and Design Institute

The Southwest Chemical Research and Design Institute(SCRDI) after tackling the key technology related with thecatalyst for manufacture of DME through gas phase dehy-dration of methanol has made great breakthroughs in largescale preparation of catalyst for DME production.