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Process for the manufacture of diesel range hydrocarbons

A range, diesel technology, applied in the field of preparing diesel range hydrocarbons, can solve the problems of inability to achieve high selectivity for converting n-alkanes, harmful catalysts, etc.

Active Publication Date: 2012-10-03
NESTE OIL OY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The high reaction temperature of 370°C cannot achieve complete conversion and high selectivity of n-alkanes
These compounds may be detrimental to the catalyst or cause other problems in handling

Method used

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  • Process for the manufacture of diesel range hydrocarbons
  • Process for the manufacture of diesel range hydrocarbons
  • Process for the manufacture of diesel range hydrocarbons

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0091] Example 1 Effect of Sulfur Content of Total Feed

[0092] Palm oil containing 0.3 area-% free fatty acids was used as fresh feed, 5:1 with product recycle, in the presence of hydrogen. C in the fresh feed 12 -C 16 The content of fatty acid triglycerides was 58.3 wt%. The total feed contains less than 10 w-ppm of alkali and alkaline earth metals on an elemental basis. The amount of other metals in the feed is less than 10 w-ppm calculated as elemental metal. The amount of phosphorus is less than 30 w-ppm as elemental phosphorus.

[0093] During the test runs, different amounts of dimethyl disulfide were used in the total feed. The reaction temperature was 305 °C, the reactor pressure was 5 MPa and the space velocity was 0.5 g / g for fresh feed. Higher levels of sulfur in the feed significantly increased the passage of CO and CO 2 The total deoxidation reaction (decarbonization reaction, which produces n-alkanes with one carbon atom less than the original fatty acid...

Embodiment 2

[0100] When embodiment 2 adopts palm oil feed, C 16 Effect of Fatty Acids on Cracking During Isomerization and Diesel Yield at Same Pour Point Levels

[0101] In this fresh feed a C containing 44.8 wt% 12 -C 16 Fatty acid triglycerides of palm oil. Dimethyl disulfide was added to palm oil to obtain a sulfur content in the feed of about 600 w-ppm, calculated as elemental sulfur. The feed purity was the same as in Example 1, but the free fatty acid content was 0.2 area %. No thinner is used. The feed was hydrotreated at 305°C in the presence of hydrogen, the reactor pressure was 5 MPa and the space velocity was 2 g / g for the fresh feed. The product mainly contains n-alkanes. The n-paraffin feed was isomerized at 317°C, 4 MPa and a WHSV of 3 liters / hour in the presence of hydrogen. Catalyst (A) contains Pt, SAPO-11 and alumina support. Product>C 10 The hydrocarbon content was 97% by weight. The cloud point of the liquid product was -22°C. The analytical results of the ...

Embodiment 3

[0103] Example 3 C under the same diesel yield using palm oil feed 16 Effect of Fatty Acid on Pour Point of Isomerized Diesel Oil

[0104] The hydrotreated palm oil obtained in Example 2 was isomerized at 312° C., 4 MPa and a WHSV of 3 liters / hour in the presence of hydrogen, using catalyst A. This gave a liquid product with a cloud point of -14°C. Product>C 10 The hydrocarbon content is now 98% by weight. A small amount of light hydrocarbons can be inferred from the flash point of this product and in the distillation curve, as can be seen in Table 4, which shows the hydrotreatment and isomerization obtained from rapeseed oil and palm oil. Analytical results of products, and HRO=hydrotreated rapeseed oil, HPO=hydrotreated palm oil.

[0105] Table 4 Analytical results of hydrotreated and isomerized products obtained from rapeseed oil and palm oil

[0106]

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Abstract

The invention relates to a process for the manufacture of diesel range hydro-carbons wherein a feed comprising fresh feed is hydrotreated in a hydrotreating step and isomerised in an isomerisation step and the fresh feed contains at least 20 % by weight triglyceride C12-C16 fatty acids or C12-C16 fatty acid esters or C12-C16 fatty acids or combinations of thereof and feed contains 50-20000 w-ppm sulphur calculated as elemental sulphur.

Description

field of invention [0001] The present invention relates to an improved process for the production of diesel range hydrocarbons from bio-oils and fats with reduced hydrogen consumption. In particular, the present invention relates to an improved process for the production of diesel range hydrocarbons with high selectivity and which produces a product with improved cold flow properties without reducing the yield of diesel during isomerization. Background of the invention [0002] Environmental concerns and increasing demand for diesel fuel, especially in Europe, are driving fuel manufacturers to use more fully renewable, available feedstocks. In the production of diesel fuels based on biological feedstocks, the main interest has focused on vegetable oils and animal fats, including triglycerides of fatty acids. The long, straight and substantially saturated hydrocarbon chains of fatty acids correspond chemically to the hydrocarbons present in diesel fuel. However, pure vegeta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G3/00C10G45/02C10G45/58
CPCC10G2300/1014C10G45/10Y02E50/13C10G2400/04C10G3/46C10G2300/1037C10G3/47C10G3/50C10G45/02C10G2300/1011C10G2300/205C10G3/00C10G2300/202C10G45/08C10G45/58C10G2300/802C10G65/043C10G2300/1018Y02P30/20Y02E50/10
Inventor J·米尔约加P·阿尔托E·哈林
Owner NESTE OIL OY
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