Lurgi Gmbh

Metallgesellschaft Aktiengesellschaft

Air Liquide Global E&c Solutions Germany Gmbh

Helmut Saft

Eckhard Seidel

Rudolf Boensch

Henning Buchold

Rudolf Bönsch

Klaus Hohmann

Peter Mitschke

Konrad Mattern

Norbert Palauschek

Rudolph Bönsch

A process for continuous production of biodiesel from vegetable oils or animal fats by transesterification with methanol or ethanol to give crude fatty acid alkyl esters, subsequent washing with water in a wash column to remove water-soluble impurities, subsequent drying by vaporization of the water content and subsequent removal of steryl glycosides by adsorption onto calcium bentonite, wherein the adsorption column(s) used is/are regenerated in a first step, for desorption of the steryl glycosides, by rinsing with a mixture consisting of fatty acid alkyl esters and methanol or ethanol, and in a subsequent second step, for removal of methanol residues, by rinsing with fatty acid alkyl esters or with gaseous nitrogen or carbon dioxide.

Process for production of biodiesel

When producing biodiesel from fats, oils or split fatty acids rich in steryl glycosides, the light phase rich in fatty acid alkyl esters, which is obtained from the transesterification or esterification, is washed with water in a washing column, wherein the suspension layer formed is treated by stirring. In this way, the steryl glycosides are transferred into the light phase of the wash. In a subsequent treatment of the light washer phase with water in an intensive mixer, compact steryl glycoside/fatty acid alkyl ester/water agglomerates are obtained, which can easily be separated by means of centrifugation. From the light phase of centrifugation, on-spec biodiesel is obtained upon further processing by drying and/or filtration. This process is suitable for processing fats, oils or split fatty acids with a high content of steryl glycosides and avoids the use of auxiliary substances foreign to the process. It is characterized by simplicity of equipment and a low demand for energy.

Process and plant for producing biodiesel

A method for the continuous extraction of impurities, in particular saponification products, from a fatty acid alkyl ester phase produced by transesterification of vegetable or animal oils or fats with a great tendency to form saponification products, by means of an aqueous, acid glycerol phase containing a complexing agent.

Method for purifying fatty acid alkyl ester greatly loaded with saponification products

Method for producing CH(OH)and at least one of fatty acid methyl ester (FAME) and fatty acid ethyl ester (FAEE) includes mixing vegetable oils and animal fats, at least one of CHOH and CHOH and at least one first catalyst to transesterify a portion of triglycerides and provide a first mixture. The first mixture is separated, with a first light phase being withdrawn and fed into a second mixer where it is mixed with at least one second catalyst to transesterify a further portion of the triglycerides to provide a second mixture. The second mixture is separated, with a second light phase being withdrawn and mixed with soapless CH(OH)to provide a dispersion which is separated by density difference. A phase containing at least one of raw FAME and raw FAEE is mixed with an aqueous acid, washed with water, with the water being expelled to provide FAME and FAEE product.

Method for producing fatty acid methyl esters or fatty acid ethyl esters

In a process for producing fatty acid methyl ester (FAME) from fats or oils by transesterification with methanol in the presence of an alkaline catalyst in at least two reaction stages traversed in succession, each consisting of a stirred-tank reactor and a downstream separator, a phase containing FAME and a phase containing glycerol are generated, which are separated in the separator, wherein the phase containing FAME is recirculated into the stirred-tank reactor of the next succeeding reaction stage and the phase containing glycerol is recirculated into the stirred-tank reactor of the first reaction stage, and the crude FAME withdrawn from the separator of the last reaction stage is transferred into a separator and the FAME withdrawn is dried. To increase the yield of FAME, the aqueous phase containing glycerol, methanol, undissociated soaps and FAME, which is obtained upon withdrawal of the FAME, is thoroughly mixed with the phases withdrawn from the separators of the first to penultimate reaction stages, which contain glycerol and FAME, and the mixture is separated in a separator into a phase containing FAME and a phase containing glycerol.

Process for continuously preparing fatty acid methyl esters or fatty esters

The deodorizing apparatus is used to treat organic liquids, such as edible oils or edible fats, in that they are stripped with water vapor under subatmospheric pressure and at temperatures from about 130.degree. to 260.degree. C. Free fatty acids and disturbing taste- and odor-imparting substances are thus removed. The liquid to be treated is passed through one or more treating stories and is agitated therein by rising water vapor. At least one of the treating stories comprises at least two concentric, open-topped annular passages having a common cylindrical wall, a vertical partition extending across the wall and an aperature in the wall adjacent the partition for allowing liquid flow between the passages. A plurality of circulating cylinders, which are adapted to be flown through in an upward direction, are arranged in each annular passage. Water vapor in the form of fine bubbles is passed through the circulating cylinders.

Apparatus for deodorizing an organic liquid

The deodorizing apparatus is used to treat organic liquids, such as edible oils or edible fats, in that they are stripped with water vapor under subatmospheric pressure and at temperature from about 130.degree. to 260.degree. C. The liquid to be treated is passed through one or more treating levels and is agitated therein by rising water vapor. At least one of the treating levels contains numerous conical circulating ducts, which can be flown through in an upward direction and are provided with a water vapor inlet in their lower portion, which is narrower in cross-section. The cone angle of the circulating duct measured against the vertical may vary from 5.degree. to 20.degree. C.

Apparatus for deodorizing organic liquids

A falling-film evaporator is provided with improved means for uniformly supplying liquid to the heating tubes thereof. The means includes an arrangement whereby a substantially constant-level head of liquid is formed upon the upper tube sheet above which the heating tubes project so that the vapor can pass directly into the open ends of these tubes, the liquid being introduced into lateral openings of constant cross section for each of the tubes below the level of liquid standing on the upper tube sheet. An annular gap surrounding the array of tubes projecting upwardly from the upper tube sheet serves to feed the liquid phase to the standing liquid upon the tube sheet and the substance to be evaporated is introduced into a chamber above the upper tube sheet and is expanded therein to the pressure of the vaporator. The vapor phase passes through the open upper ends of the tubes.

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Niddatal, Germany

Helmut Saft