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Process for preparing heavy base oils

A base oil and hydrorefining technology, which is used in the refining of hydrocarbon oil, petroleum industry, processing of hydrocarbon oil, etc., can solve the problems of lower yield, lower ratio of heavy lubricating base oil and light lubricating base oil, etc., and achieve high yield. rate effect

Active Publication Date: 2018-06-08
SHELL INT RES MAATSCHAPPIJ BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But higher hydrotreating depth means lower yield of 370°C+ hydrotreated product and lighter product after all hydrotreated (boiling point shift due to deep hydrotreating), which, as a consequence, significantly reduces Ratio between heavy lubricating base oil and light lubricating base oil

Method used

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  • Process for preparing heavy base oils
  • Process for preparing heavy base oils
  • Process for preparing heavy base oils

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0057] The yield of heavy base oil in step (e) is higher when compared to known methods of preparing base oils employing hydrocracking and catalytic dewaxing steps. This high yield of heavy base oil can be expressed as the ratio of heavy base oil to light base oil obtained in step (e). For example a high yield of heavy base oil can be expressed as the ratio of 500N base oil to 150N base oil obtained in step (e). The 500N base oil is a heavy Group II base oil with a viscosity of typically 10.0-12.9 cSt at 100°C, while the 150N base oil is a light Group II base oil with a viscosity of typically 4.8-6.8 cSt at 100°C. Suitably, the ratio of 500N base oil to 150N base oil obtained in step (e) is at least 1.0, preferably at least 1.5, more preferably at least 2.5, and most preferably at least 3.0.

[0058] This high yield of heavy base oils is based on a special sequence of process steps (a)-(e) and application-specific catalysts and / or catalyst combinations, and constitutes a majo...

Embodiment 1

[0070] Embodiment 1 (the present invention)

[0071] The feedstock described in Table 1 was hydrotreated with a conventional NiMo on alumina hydrotreating catalyst (C-424 from the Criterioncatalyst portfolio for this example) with the goal of producing a hydrogenation catalyst containing about 50 ppm nitrogen and about 300 ppm sulfur. Effluent after hydrogen treatment (370 °C + distillate).

[0072] The operating conditions and main results of the hydrotreatment step are given in Table 2 below.

[0073] Table 2: Production of hydrotreated effluent in step (b) of the present invention

[0074]

[0075]

Embodiment 2

[0076] Embodiment 2 (comparative example)

[0077] The same feedstock (as shown in Table 1) was hydrotreated in a conventional manner to significantly reduce the nitrogen and sulfur contents to 2 o 3 - Class II hydrotreating catalysts (eg DN-3100 from the Criterioncatalyst portfolio). The operating conditions and main results of the hydrotreating step are given in Table 3.

[0078] Table 3: Production of hydrotreated effluent in a conventional manner

[0079]

[0080]

[0081] Step (b) summary table

[0082] step (b)

[0083] 460℃+，％

[0084] In step (c), the effluents obtained from Examples 1 and 2 are stripped of H 2 S and NH 3 Impurities and light products. Subsequently, in step (d), the product obtained in step (c) is subjected to a dewaxing step according to the invention and a conventional dewaxing step.

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Abstract

The present invention provides a method for preparing heavy base oil, comprising the steps of: (a) providing a hydrocarbonaceous feedstock comprising at least 50% by weight of hydrocarbons with a boiling point higher than 460°C, 800-2500ppmw of nitrogen and 1.5- 4.0 wt% sulfur; (b) hydrotreating said hydrocarbonaceous feedstock with a hydrotreating catalyst in the presence of a hydrogen-containing gas under hydrotreating conditions to obtain a nitrogen content of 30-80 ppmw and a sulfur content of 200-450 ppmw (c) remove at least 50% of the NH3 and H2S present in the hydrotreated product obtained in step (b); (d) under catalytic dewaxing conditions in the presence of a hydrogen-containing gas catalytically dewaxing at least part of the hydrotreated product obtained in step (c) with a dewaxing catalyst comprising a Group VIII metal hydrogenation component, a dealuminated aluminosilicate, to obtain a dewaxed product Zeolite crystals and a low-acid refractory oxide binder material substantially free of alumina; (e) at least partially removing the at least part of the obtained product obtained in step (d) with a hydrofinishing catalyst in the presence of a hydrogen-containing gas under hydrofinishing conditions. hydrofinishing the wax product to obtain a heavy base oil; and (f) recovering the heavy base oil.

Description

technical field [0001] The present invention relates to a process for the preparation of heavy base oils. Background technique [0002] The main use of base oils is in lubricating oils such as motor oils to protect internal combustion engines in motor vehicles. Lubricating oils usually consist of a main base oil and various additives to achieve the desired properties. [0003] Light lubricating base stocks are primarily used in automotive applications, while heavy lubricating base stocks are used in heavy duty applications such as marine engines and industrial processes. [0004] Base oils for use in lubricating oils are produced on a large scale by first hydrotreating vacuum gas oil distillates and / or deasphalted oils, and subsequently hydrotreating the hydrotreated liquid product or hydrotreated liquid Catalytic dewaxing and hydrofinishing of the 370°C+ fraction of the product. Typically noble metal dewaxing catalysts are employed in the catalytic dewaxing step. Organo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G65/04C10G67/02C10G65/08C10G45/64
CPCC10G45/64C10G65/043C10G65/08C10G67/02C10G2300/202C10G2400/10C10G65/12C10G65/04
Inventor L·G·胡弗J·J·巴瑞克N·博门德耶尔J·W·杜伊尼克G·J·阿特斯
Owner SHELL INT RES MAATSCHAPPIJ BV