DILCHILL Dewaxing

In DILution CHILLing the Scraper Surface Exchangers (SSE) are replaced with a multistage crystallizer. Cold Solvent is added at each stage and the slurry is mixed with an impeller. The crystallizer replaces all the SSEs with a single mixer. [Pg.35]

Less oil is occluded in the wax crystal due to the vigorous micromixing in the crystallizer [Pg.35]

Higher filtration rates and lower oil-in-wax are achieved as a results of [Pg.35]

Optimum Crystal Formation Leads to Faster Filter Rates, Lower Solvent/Oil Rations and Lower Oil-in-Wax Content [Pg.36]

FIGURE 6.11 DILCHILL dewaxing/warm-up deoiling process. [Pg.153]

SSEs and SSCs are used in incremental dewaxing and SSCs in DILCHILL dewaxing. SSEs and SSCs are double pipe exchangers with slurry inside the central tube and the cooling media (filtrate or relfigerant) in the annular area aroimd the inside tube (pipe). Tubes are t5q)ically stacked in groups of 8, 10 or 12 and internal flow may be in parallel or series. Internal pipe diameters are t3 ically 6, 8, 10, 12 inches. [Pg.43]

DILCHILL dewaxing is ideally suited for Warm-up deoiling. The spherical nature of the crystals facilitates the melting of the softwax and re-crystallization is not required. [Pg.61]

Bushnell, J. D. Eagan, J. F., Commercial Experience with DILCHILL Dewaxing , paper F L-75-50, 1975, NPRA Fuels and Lubricants Meeting, Sept., 11-12, 1975, Houston, Texas,... [Pg.78]

Dilchill [Dilute, chill] A process for dewaxing petroleum by controlled crystallization, with cooling accomplished by the incremental addition of a cold solvent. Developed by Exxon Research Engineering Company. [Pg.88]

A significant advance in solvent dewaxing was announced by ExxonMobil16-18 in 1972 in the form of the DILCHILL (DILution CHILLing) process, which improves the crystallization step by producing large, dense, spherical crystals ... [Pg.150]

Source DILCHILL Solvent Dewaxing Technology, ExxonMobil, available at http // www.prod.exxonmobil.com/refiningtechnologies/lubes/mn dilchill.html. With permission. [Pg.152]

Pre coolers Dilchill Scraped surface Dewaxing Warm-up de-oiling... [Pg.153]

Feedstock DILCHILL , bpd per 1000 ft2 Filter Area Conventional Dewax Plant, bpd per 1000 ft2 Filter Area... [Pg.153]

Oil in Wax Contents in Slack Wax from DILCHILL and Conventional Dewaxing ... [Pg.154]

Examples of proposed DCC coolants include liquid butane for the seawater desalination process (section 8.4.7) and methyl ethyl ketone for the Dilchill lubricating oil dewaxing process (Bushnell and Eagen, 1975). Chlorinated hydrocarbons, fluorocarbons and CO2 have also found application in specific cases. [Pg.376]

Figure 23. Comparison of Wax Crystals Formed in DILCHILL and Incremental Dewaxing...

Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...