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Method for obtaining solid paraffinic compounds by hydrotreatment of vegetable oils

Inactive Publication Date: 2012-02-16
ECOPETROL SA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0015]Preheat the organic oil to a temperature between 50 and 100° C., to make it fluid and be able to transfer it to the following steps of the process. The oil and the hydrogen are mixed in the pipeline and are passed through a furnace to heat it to the desired temperature. Inside the reactor, the hydrogen reacts with the oil on the active sites of the catalyst at pressures between 2 and 11 MPa and temperature between 150° C. and 330° C., with an hourly space velocity between 0.2 and 6 h−1. The employed catalyst is of fixed bed, composed of nickel an

Problems solved by technology

The solid paraffins derived from petroleum present a high content of carcinogenic pollutants, that doesn't allow them to be suitable for applications in the pharmaceutical or food industry, particularly by the presence of polynuclear aromatic hydrocarbons (PNA's).
According with the quoted requests, the existing inventions in the state of the technique are limited to the production of liquid paraffins, principally for the use as transport fuel.

Method used

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  • Method for obtaining solid paraffinic compounds by hydrotreatment of vegetable oils

Examples

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example 1

[0039]With the purpose of studying the hydrotreatment of crude palm oil as an option to obtain solid paraffins, the load was subjected to hydrotreatment with high purity hydrogen in a fixed-bed reactor, in its inside loaded with three different beds of NiMo catalyst supported on previously sulphurized alumina, under the operation conditions of table 1. These tests were done in the hydrotreatment pilot plant.

TABLE 1Severity of example 1 from HDT of ACPTemperaturePressureResidence TimeH2 / load ratio(° C.)(MPa)(h − 1)(LN / L)30096472

[0040]In tables 2 and 3 it can be observed the analytic results of the solid paraffin obtained in the pilot plant, which has a low content of aromatics.

TABLE 2Physical-chemical characteristics of the solid paraffin.ParaffinTESTUnitPilot plantWaxes Content% p / p21.2Fluidity point° C.33Cloud point° C.34Flashpoint° C.35Combustion heatMJ / kg44.468Viscosity at 40° C.mm2 / s6.6Water and sediment content% V0.2Densityg / ml0.8API° API41.7Water contentppm5203Acid numbermgKOH...

example 2

[0042]Runs were made, modifying the reaction temperatures and the hourly space velocity of example 1, which are presented in table 5.

TABLE 5Severity of example 2 of HDT of ACPTemperaturePressureHourly SpaceH2 / load ratio(° C.)(MPa)velocity (h − 1)(LN / L)31092472300924722809247226092472

[0043]In tables 6, 7 and 8 there are presented the analysis of the paraffins obtained with the invention process at the temperatures indicated in table 5. In table 8 they are reported the maximum absorbance values obtained in the ranges of wavelength defined by the standard FDA 21CFR 172.886 for petroleum waxes and the obtained in this invention.

[0044]Specifically in table 6 it can be observed how as the reaction temperature lowers the water formation decreases, while in table 7 it can be observed that as the temperature is reduced the quantity of obtained product in the cut of 334° C. —FBP increases and the quantity obtained in the cut 221° C.-334° C. decreases; by mass analysis the presence of aromatic...

example 3

[0045]In this example, there are reported the results of a solid paraffin obtaining process at a temperature of 230° C., pressure of 9 MPa, hourly space velocity of 2 h−1 and a H2 / load ratio of 472 LN of H2 / L of load, with a fresh high activity catalyst. These paraffins posses a solid content above 90% at a temperature of 20° C. and above 80% at a temperature of 40° C.

[0046]In table 10 there are presented the results of the physical-chemical properties of the paraffin. These paraffins posses excellent hardness characteristics, as well as a melting point above 45° C.

TABLE 10Physical-chemical characteristics of thesolid paraffins obtained at 230° C.UnitParaffin - 230° C.AnalysisAcid Numbermg KOH / g10.6Flashpoint° C.148.0Kinematic Viscosity at 100GRmm2 / s7.0Density at 15 GR Cg / mL0.9Solid fat content at 20° C.% weight97.6Solid fat content at 40° C.% weight81.1API gravity° API27.2Fluidity point° C.47.2Melting point° C.53.5Water contentg / Kg4.4Penetration in wax at 25° C.mm / 1012.0Combustion ...

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Abstract

The present application relates to a method for obtaining solid paraffins from vegetable oils and / or animal fats, which is characterized in that the organic oil is preheated to a temperature of between 50 and 100° C. in order to render the oil fluid and for it to be possible to transfer the oil to steps downstream in the method. The oil and the hydrogen are mixed in the pipeline and passed via a furnace in order to be heated to the desired reaction temperature. Inside the reactor, the hydrogen reacts with the oil at the active sites of the catalyst at pressures of between 2 and 11 MPa and temperatures of between 150° C. and 330° C., with an hourly space velocity of between 0.2 and 6 h−1. The catalyst used is of fixed-bed type, composed of molybdenum and nickel oxides supported on alumina that have previously been sulphurized in order to be activated. The hydrotreated product exits via the lower part of the reactor and passes to a level separator.

Description

TECHNOLOGICAL SECTOR[0001]With the shortage of paraffinic crudes at global level and the consequent difficulty for obtaining solid paraffins in the refineries, the applicant has found that the direct hydrotreatment of oils or fats of organic origin offers an alternative for the production of solid paraffinic compounds, which have a wide application in different industrial fields as are candle manufacturing, waxed papers production, coverage of pharmaceutical products and foods, among others.[0002]The solid paraffins derived from petroleum present a high content of carcinogenic pollutants, that doesn't allow them to be suitable for applications in the pharmaceutical or food industry, particularly by the presence of polynuclear aromatic hydrocarbons (PNA's). The paraffins obtained through the process of the present invention, lack such hydrocarbons, which make them optimal for the pharmaceutical and food industry.STATE OF THE TECHNIQUE[0003]Within the estate of the technique related w...

Claims

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Application Information

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IPC IPC(8): C10G99/00
CPCC08L91/06C10G2300/4018C10G3/46C10G3/50C10G3/54C10G2300/1014B01J23/883C10G2300/4006C10G2300/4012C10G2300/701C10L7/02B01J37/20C10G2300/1018Y02P30/20Y02P20/129
Inventor NUNEZ ISAZA, MANUEL LAUREANOPRADA VILLAMIZAR, LAURA PATRICIA
Owner ECOPETROL SA
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