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A process for the production of bio-naphtha from complex mixtures of natural occurring fats & oils
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A mixture, naphtha technology, used in the preparation of liquid hydrocarbon mixtures, fatty acid production, biofuels, etc., can solve problems such as corrosion and excessive scaling
Inactive Publication Date: 2015-11-11
TOTAL RES & TECH FELUY
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However, the use of this type of feedstock can lead to corrosion problems and excessive fouling due to the formation of oxygenates from the oxygen atoms in the biological feedstock
Also, existing steam crackers are not designed to remove the high amounts of carbon oxides produced by steam cracking of these biomass feedstocks
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[0166] In an isothermal reactor, 50 ml of a hydrotreating catalyst consisting of molybdenum and nickel supported on alumina (prepared according to patent US6280610B1) was loaded, the catalyst was dried and used under standard conditions with End-boiling straight-run gas oil (straight-run gas oil is the gas oil fraction obtained directly after distillation without any other treatment) presulfurized. The gas oil is doped with dimethyl disulfide (DMDS). Hydrodeoxygenation of fatty acids is carried out under the following conditions:
[0184] In an isothermal reactor, 10 ml of a hydrotreating catalyst (KF848 obtained from Albemarle) consisting of molybdenum and nickel supported on alumina was loaded, the catalyst was dried and washed with straight-run DMDS-doped Gas oil presulfurization. Hydrodeoxygenation of rapeseed oil was carried out under the following conditions:
[0190] Table 6 shows a typical composition of rapeseed oil.
[0191] The gas and liquid effluents are separated by a separator (gas / liquid) at atmospheric pressure. The gas is sent to the μ-GC analyzer and the liquid is sent to the sampler. The mass balance is about 99% and all product weights are calculated for 100 g of treated feedstock.
[0192] Tabl...
Embodiment 3
[0202] N-paraffins and conventional naphtha were steam cracked under different severity conditions. Table 8 presents the results. From the results it is evident that the bio-naphtha thus obtained is a better feedstock for steam cracking than fossil naphtha.
[0203] Significantly higher ethylene and propylene yields can be obtained, however methane production and pyrolysisgasoline production are reduced by at least about 20%. HVC (High Value Chemicals = H 2 +ethylene+propylene+butadiene+benzene) with a final yield higher than 70% by weight. The ethylene / methane weight ratio is always higher than 3.
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Abstract
The invention relates to a process for making a bio-diesel and a bio-naphtha from a complex mixture of natural occurring fats & oils, wherein said complex mixture is optionally subjected to a refining treatment for removing the major part of the non-triglyceride and non-fatty acid components, thereby obtaining refined oils; said complex mixture or refined oils are subjected to a hydrolysis step for obtaining glycerol and a mixture of free fatty acids; said mixture of free fatty acids are subjected to a fractionation step for obtaining: a liquid or substantially liquid free fatty acids part (phase L); and a solid or substantially solid free fatty acids part (phase S); and said phase L is transformed into alkyl-esters as bio-diesel by an esterification; said phase S is transformed into linear or substantially linear paraffins as the bio-naphtha: by hydrodeoxygenation or decarboxylation of the free fatty acids; or from said phase S are obtained fatty acids soaps that are transformed into linear or substantially linear paraffins as the bio-naphtha by decarboxylation of the soaps.
Description
technical field [0001] The present invention relates to the production of bio-naphtha and bio-distillate from complex mixtures of naturally occurring oils (fats & oils) in integrated bio-refinery. The limited supply and increasing cost of crude oil and the need to reduce fossil-based carbon dioxide emissions have prompted the search for alternative processes for the production of hydrocarbon products such as bionaphtha and biodiesel. The bio-naphtha can be used as a feedstock for conventional steam cracking. Consisting of organic matter derived from living organisms, biomass is the world's leading renewable energy source. [0002] Hereinafter, "biodiesel" is sometimes referred to as "biodistillate". Background technique [0003] Made from renewable sources, biodistillates are gaining in importance as an alternative fuel for diesel engines. In addition to meeting engine performance and emissions standards / regulations, bio-distillates must also compete economically with pet...
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