Chem Systems

TerephthalicHdd and Dimethyl Terephthalate, reportno. 75-1, Chem. Systems, Inc., New York, July 1975. 

Fig. 14. Acetylene for chemical us in the United States (37). Courtesy of Chem Systems. Total consumption for specified years in 10 t as follows 1965,...

MIBK Direct Conversion ofMcetone over Heterogeneous Catalyst-Sumitomo, Process Evaluation Research Planning (PERP), Topical Reports, Vol. Ill, Chem Systems Inc., Tarrytown, NY, 1988. 

Consultants, such as Chem Systems, CMAl, Colin Houston Associates, Kline Co., Arthur D. Litde, Philip Townsend Associates, Inc.,... 

A fundamentally different reaction system is under development by Air Products and Chem Systems (23). In this system, synthesis gas is bubbled through a slurry consisting of micrometer-sized methanol catalyst particles suspended in a paraffinic mineral oil. The Hquid phase serves as the heat sink to remove the heat of reaction. 

The North Mmerican Markets for Polyurethane Products 1988 1989—Chem Systems Pinal Keport, Polyuiethane Division of the Society of the Plastics Industiy, Taiiytown, N.Y., July 1989. 

Styrene from Butadiene, PERP report 93S3, Chem Systems, Tarrytown, N.Y., (Mar. 1995). 

Table 8 summarizes the Chem Systems analysis of the cost of production of BTX from these feeds, resulting ia a recommendation of the best-suited technology for each feedstock. 

Chem Systems Inc. proposed a process in which ben2yl alcohol obtained by an undisclosed direct oxidation of toluene is homologated with synthesis gas to yield 2-phen5iethyl alcohol, which is then readily dehydrated to styrene (57). This process eliminates the intermediate formation of methanol from synthesis gas but does require the independent production of ben2yl alcohol. 

Chemical Economics Handbook, SRI International, Menlo Park, Calif. Petrochemicals Primary, Chem Systems Inc., New York, 1987. 

W. M. Weiss, personal communication, Monsanto Enviro-Chem Systems Inc., St. Louis, Mo., 1991. 

The reaction is carried out over a supported metallic silver catalyst at 250—300°C and 1—2 MPa (10—20 bar). A few parts per million (ppm) of 1,2-dichloroethane are added to the ethylene to inhibit further oxidation to carbon dioxide and water. This results ia chlorine generation, which deactivates the surface of the catalyst. Chem Systems of the United States has developed a process that produces ethylene glycol monoacetate as an iatermediate, which on thermal decomposition yields ethylene oxide [75-21-8]. 

Hassan, 1999. Nadeem Hassan, Monsanto Enviro-Chem Systems, (314) 275-5782, personal communication with Eric Albright, May 26, 1999. 

Interesting features of this process include the potential for one-stage methanation to completion without the need for gas recycle. This feature was cited by Chem Systems, but, according to Rheinpruessen-Koppers work on the Fischer-Tropsch (52, 53), gas recycle was necessary with high H2 CO ratios. Drawbacks include such factors as catalyst attrition (48, 50), and low volume productivities of the methanator (less than one-tenth that reported for fixed bed adiabatic reactors) (48, 50, 52, 53, 61). 

DAVID B. BLUM, MARTIN B. SHERWIN, and MARSHALL E. FRANK Chem Systems, Inc., Research Center, 275 Hudson St., Hackensack, N. J. 07061... 

On the basis of this past work and ongoing experiments, we feel that the liquid-phase methanation process promises to become an economic, reliable, and versatile means of converting synthesis gas mixtures to high Btu gas. Chem Systems believes that this technology is a key step in the transformation of fossil feeds into pipeline gas, and we look forward to its successful application in commercial coal gasification plants. 

Dianor [Diamond Alkali, Oronozio de Nora] A process for cracking naphtha to ethylene, adapted for small-scale operation so that polyvinyl chloride could be made by developing nations. Developed in the 1970s by Chem Systems and the two named companies, but not commercialized. 

LPMEOH A process for making methanol. Developed by Air Products Chemicals and Chem Systems in the late 1970s. 

Air pollution dispersion modeling, for odor impacts, 26 725 Air preheater, 19 512 Air products and chem systems, methanol process, 26 310-311 Air quality... 

In Japan the need for new technology was answered by the development of an electrolytic route to sebacic acid(33). The Kolbe type electrolytic process developed by Asahi involves dimerization of adipic acid half methyl ester salt to give dimethyl sebacate(34). The dimerization proceeds in 92% yield with 90% selectivity based on the adipate half ester. The main drawbacks of this process are the cost of energy utilized by the electrolytic process and the cost of adipic acid. A Chem Systems report indicates a small advantage for the Asahi electrolytic process with ample room for new technology development(35). 

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