Process for the manufacture of diesel range hydrocarbons
AssigneeNeste Oil Oyj
InventorsJukka Myllyoja, Pekka Aalto, Pekka Savolainen, Veli-Matti Purola, Ville Alopaeus, Johan Grönqvist
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Abstract
The invention relates to a process for the manufacture of diesel range hydrocarbons wherein a feed is hydrotreated in a hydrotreating step and isomerised in an isomerisation step, and a feed comprising fresh feed containing more than 5 wt % of free fatty acids and at least one diluting agent is hydrotreated at a reaction temperature of 200-400° C., in a hydrotreating reactor in the presence of catalyst, and the ratio of the diluting agent/fresh feed is 5-30:1.
Claims21
A process for the manufacture of diesel range hydrocarbons comprising:
- combining a fresh feed stream of biological origin and a stream comprising hydrotreated product recycle liquid to form a total feed stream;
- introducing the total feed stream to a hydrotreating step;
- hydrotreating the total feed, in the hydrotreating step;
- introducing the hydrotreated product to an isomerization step;
- and
- isomerizing the hydrotreated product in the isomerization step, wherein
- the fresh feed stream contains more than 5 wt % of free fatty acids,
- the total feed is hydrotreated at a reaction temperature of 280-340° C., in the presence of a catalyst, and
- the ratio of the hydrotreated product recycle liquid/fresh feed in the total feed is 5-30:1.
A process for the manufacture of diesel range hydrocarbons comprising:
- combining a fresh feed stream of biological origin and a recycled liquid hydrotreated product recycle liquid to form a total feed stream;
- introducing the total feed stream to a hydrotreating step;
- hydrotreating the total feed, in the hydrotreating step;
- introducing the hydrotreated product to an isomerization step;
- and
- isomerizing the hydrotreated product in the isomerization step, wherein
- the fresh feed stream contains more than 5 wt % of free fatty acids,
- the total feed is hydrotreated at a reaction temperature of 250-340° C., in the presence of a catalyst, and
- the ratio of hydrotreated product recycle liquid/fresh feed in the total feed is 5-30:1.
A process for the manufacture of diesel range hydrocarbons comprising:
- combining a fresh feed stream of biological origin and a stream comprising a hydrotreated product recycle liquid to form a total feed stream;
- introducing the total feed stream to a hydrotreating step;
- hydrotreating the total feed, in the hydrotreating step;
- introducing the hydrotreated product to an isomerization step;
- and
- isomerizing the hydrotreated product in the isomerization step, wherein
- the total feed is hydrotreated at a reaction temperature of 280-340° C., in the presence of a catalyst, and
- the ratio of the hydrotreated product recycle liquid/fresh feed in the total feed is 5-30:1.
A process for the manufacture of diesel range hydrocarbons comprising:
- combining a fresh feed stream of biological origin and a stream comprising hydrotreated product recycled liquid to form a total feed stream;
- introducing the total feed stream to a hydrotreating step;
- hydrotreating the total feed, in the hydrotreating step;
- separating a vapor stream and a liquid stream in a high temperature separator,
- returning part of the liquid stream as hydrotreated product recycle stream to the hydrotreating reactor;
- introducing the hydrotreated product to an isomerization step;
- and
- isomerizing the hydrotreated product in the isomerization step, wherein
- the fresh feed stream contains more than 5 wt % of free fatty acids,
- the total feed is hydrotreated at a reaction temperature of 280-340° C., in the presence of a catalyst, and
- the ratio of the recycled liquid hydrotreated product/fresh feed in the total feed is 5-30:1.
Dependencies are inferred from the claim text.