Kel-Chlor process

However, DuPont in Corpus Christi (USA) brought a modified Deacon process on stream in 1975, the Kellog Kel-Chlor process, in which the hydrogen chloride produced as a byproduct in the manufacture if fluoro-hydrocarbons is oxidized. Fig. 1.7.13 shows a schema of this process. 

Chlorine Recovery (Kel-Chlor Process) Pullman Kellogg, Hydrocarbon Process. 56, 139, Nov. 

Among the catalytic routes, the Kel-Chlor process [11-13] is one modification that has been applied commercially. The process uses hot, concentrated sulfuric acid... 

Figure 15.3 is a schematic of the apparatus used in the Kel-Chlor process. A unit was constructed and operated in conjunction with a fluorocarbon production in the United States. The recovered chlorine was recycled to the precursor process. The plant is no longer in operation. It is reported that corrosion problems became severe. 

Combining volumes. 1.00 liter of oxygen is consumed in the Kel-Chlor process for converting HCl to Cl, ... 

The M. W. Kellogg Co. Hydrogen Chloride to Chlorine, The Kel-Chlor Process, presentation at the 20th Chlorine Plant Managers Seminar, New Orleans, Feb. 9, 1977. 

About 75 percent of the caustic produced is concentrated. The remainder is used directly as alkaline cell liquor—as, for example, in the conversion of propylene to propylene oxide by the chlorhydrin process. Similarly, there is some chlorine produced by methods that do not produce caustic, as shown in Table 12.18. Fused chloride salt electrolysis produces chlorine in the manufacture of magnesium metal by the Dow process, and of sodium metal in the Downs cell. The only other process of note is the Kel-Chlor process. This process converts by-product HCl to chlorine by oxidation with NO2 through the intermediates NOCl and HNSO5. 

Alternatives to oxychlorination have also been proposed as part of a balanced VCM plant. In the past, many vinyl chloride manufacturers used a balanced ethylene—acetylene process for a brief period prior to the commercialization of oxychlorination technology. Addition of HCl to acetylene was used instead of ethylene oxychlorination to consume the HCl made in EDC pyrolysis. Since the 1950s, the relative costs of ethylene and acetylene have made this route economically unattractive. Another alternative is HCl oxidation to chlorine, which can subsequently be used in dkect chlorination (131). The SheU-Deacon (132), Kel-Chlor (133), and MT-Chlor (134) processes, as well as a process recently developed at the University of Southern California (135) are among the available commercial HCl oxidation technologies. Each has had very limited industrial appHcation, perhaps because the equiHbrium reaction is incomplete and the mixture of HCl, O2, CI2, and water presents very challenging separation, purification, and handling requkements. HCl oxidation does not compare favorably with oxychlorination because it also requkes twice the dkect chlorination capacity for a balanced vinyl chloride plant. Consequently, it is doubtful that it will ever displace oxychlorination in the production of vinyl chloride by the balanced ethylene process. 

Kel-Chlor [Kellogg Chlorine] A non-catalytic version of the Deacon process for making chlorine by oxidizing hydrochloric acid, in which nitrosyl sulfuric acid and nitrosyl chloride are intermediates and concentrated sulfuric acid is used as a dehydrating agent ... 

MT-chlor [Mitsui Toatsu Chlorine] A process for recovering chlorine from hydrogen chloride. The hydrogen chloride is mixed with oxygen and passed through a fluidized bed of chromia/silica catalyst. Developed by Mitsui Toatsu and first operated in Japan in 1988. See also Deacon, Kel-Chlor. 

The Deacon process solved these problems by replacing manganese dioxide by air as the oxidizer (Eq. 8.55). Further tuning of the Deacon process resulted in the development of the Kel Chlor Cu/heat... 

Monsanto and MW Kellogg have entered into an agreement to offer technology for VCM plants. The process combines Monsanto s direct chlorination, EDC pyrolysis and purification technology with Kellogg s Kel-Chlor technology for making chlorine from hydrochloric acid. The Kel-Chlor step replaces the oxychlorination section of a conventional balanced process and the chlorine product is sent to the direct chlorination reactor for conversion to EDC. 

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