Process for making non-carcinogentic, high aromatic process oil

a high aromatic, process oil technology, applied in the direction of hydrocarbon oil treatment products, thickeners, fuels, etc., can solve the problems of non-carcinogenic pole treating oil development, other product contamination with pca, and high investment costs of a separate countercurrent extractor devoted to a high polycyclic stream

Inactive Publication Date: 2003-09-11
SHELL OIL CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, investment costs for a separate countercurrent extractor devoted to a high polycyclic stream is expensive.
Using an existing lube extractor for this process might lead to other product contamination with PCA.
However, these extracts contain carcinogens.
Development of a non-carcinogenic pole treating oil is a challenging area due to the properties required (a high aromatic, low viscosity stream with a flash point above 150.degree. F.).

Method used

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  • Process for making non-carcinogentic, high aromatic process oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

(Feed 1 in Table 1): Distillate extracts (25 wt. %) and a distillate (75 wt. %) were mixed well by stirring at 50.degree. C. for one hour. The sample was drawn out and its properties were measured: Density 0.9120 g / cc at 60.degree. F. and the other feed properties are listed in Table 1 for Feed 1.

[0022] (b) Example 2 (Feed 2 in Table 1): Distillate extracts (20 wt. %) and a distillate (80 wt. %) were mixed well by stirring at 50.degree. C. for one hour. The sample was drawn out and its properties were measured: Density 0.9046 g / cc at 60.degree. F.; D2887E Distillation 50 411, 50% 509, 95% 939.degree. F.; and the other feed properties are listed in Table 1 for Feed 2.

[0023] (c) Example 3 (Feed 3 in Table 1): Distillate extracts (15 wt. %) and a distillate (85 wt. %) were mixed well by stirring at 50.degree. C. for one hour. The sample was drawn out and its properties were measured: Density 0.8989 g / cc at 60.degree. F. and the other feed properties are listed in Table 1 for Feed 3.

[00...

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Abstract

An atmospheric distillate stream is combined with a calculated amount of lubricant extract stream. This well-mixed stream is then hydrotreated to yield a non-carcinogenic, high aromatic process oil. A desired level of high aromatic lubricant product streams and having the desired solvency properties is achieved by varying the feed stream ratio and hydrotreating conditions.

Description

[0001] 1. Field of the Invention[0002] The invention is related to a process for obtaining non-carcinogenic aromatic oils from a mixed distillate and an extract feed obtained in the manufacture of lubricant base oils. A simple feed blending and hydrotreating process is shown for producing aromatic process oil, which shows a mutogenicity index of less than one by a Modified Ames Test.[0003] 2. Description of Related Art[0004] In Applicants' recent patent application Ser. No. 09 / 455,069, filed on Dec. 6, 1999, a two step approach which is applicable only to a lubricant extract stream is described. The invention described herein covers broader lubricant streams, i.e., blending of a distillate with a lubricant extract stream. It uses a single step approach, and is highly economical relative to our prior method.[0005] Repsol Petroleo patent EP-839891 discloses a process for obtaining aromatic oils with a polycyclic aromatic compounds content of less than 3% (IP-346) from the mixed extrac...

Claims

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Application Information

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IPC IPC(8): C10G45/00C10G45/06C10G45/08C10G67/04
CPCC10G2400/10C10G45/00
InventorJOIS, YAJNANARAYANA HALMUTHURKAUSHIK, KRISHNA RANGRAJDEKRAKER, ABRAHAM ROBERT
OwnerSHELL OIL CO