The MLDW Process Commercial Experience

Two types of reactivations are mentioned,20 a nonoxidative hydrogen-rich one at 15- to 100-day intervals,21 and oxygen regeneration at longer intervals (6 to 12 months) to bum off coke buildup on the catalyst. Yields are given in Table 10.5 for commercial operations. 

FIGURE 10.9 Schematic of MLDW lube dewaxing unit. 

Source M. P. Ramage, K. R. Graziani, and J. R. Katzer, Science and Application of Catalytic Lube Oil Dewaxing, presented at the Japan Petroleum Institute meeting, Tokyo, Japan, October 27-28, 1986. With permission. 

Type of feeds Waxy solvent refined raffinates, waxy hydrocrackates, 

Source K. W. Smith, W. C. Starr, and N. Y. Chen, New Process Dewaxes Lube Base Stocks, Oil and Gas Journal May 26 75-85 (1980). With permission. 

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