Esterification of free fatty acids using water-tolerable Amberlyst as a of heterogeneous acid catalysts, Amberlyst 15 and Amberlyst BD The grant supports Rohm and Haas’s development of a newly commercial polymeric catalyst technology, AMBERLYSTâ„¢ BD20 specialty. When the FFA contents of oils were and wt%, the activity of Amberlyst 15 gradually decreased with recycling, whereas the activity of Amberlyst BD

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Process for the preparation of meth acrylate esters and polyester meth acrylates using microwave energy as a heating source. Continuous method for the heterogenically catalyzed esterification of fatty acids.

In one embodiment, unit may have operating conditions and provisions as previously described for unit when charged with heterogeneous catalyst; whereas unit may have operating conditions and provisions as described for unit when not containing heterogeneous catalyst. FFA testing of the dry reaction mixture smberlyst completed as described in Example 1 except that a double water wash was performed to remove all MSA.

The method of claim 1wherein said alcohol is methanol or ethanol. The use of acids, niobium oxide, and zeolite catalysts for esterification reactions. The reactor may be fitted with provisions to bbd20 and remove heterogeneous catalyst, including by means of motive fluid flow.

These feedstocks may or may not have been pretreated using hd20 understood by one skilled in the art to remove impurities. Potential causes of this steady deactivation include catalyst fouling and deactivation by proteins, phospholipids, metal ions, neutralization, chemical compounds i. In one embodiment the second reaction mixture 5 is washed with water before entering a decanter The present invention may be practiced by implementing process units in different orders than as specifically set forth herein.


The residence time of the acid though the catalyst bed should be approximately minutes. In one embodiment the carboxylic acids contained in the feedstock are free fatty acids.

USB2 – Dual catalyst esterification – Google Patents

A first reaction mixture 3 containing lower quantities of carboxylic acid than the feedstock 1 exits unit and enters a reactor containing heterogeneous catalyst. The second reaction mixture 10 enters unit which may be a decanter, centrifuge, flash evaporator, flash drum, vacuum distillation column or other separation unit. In one embodiment, alcohol 2 is introduced to a feedstock containing carboxylic acid 1 and homogenous catalyst.

Method for producing alkyl carboxylates by multi-stage esteridication interrupted with a dehydration step. The method of claim 1wherein the combination of said homogeneous catalyst and said heterogeneous catalyst provide increased conversion relative to the use of either catalyst amverlyst.

US8957242B2 – Dual catalyst esterification – Google Patents

The final FFA content of the amberlyt phase began at In one embodiment, the feedstock containing carboxylic acid 1 is pretreated to remove impurities and dried to remove moisture before entering the reactor In another embodiment, the WHSV is selected between 0. In one embodiment, the feedstock described in the invention is dried to a moisture content of less than 0.

The FFA esterification reaction is affected by temperature, molar ratio of alcohol to FFA, mass transfer limitations, catalyst concentration, reaction time, and reaction stoichiometry.

The second reaction mixture 5 enters unit which may be a decanter, centrifuge, flash evaporator, flash drum, vacuum distillation column, or other similar amber,yst unit.

After a prescribed residence time a second reaction mixture 5 exits the reactor containing lower quantities of carboxylic acid than both the feedstock 1 and the first reaction mixture 3.

The homogenous catalyst may be contained in either or both phases. Ambeflyst reactor contains a predetermined amount of heterogeneous catalyst.

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In one embodiment the first reaction mixture 3 is washed with water before entering a decanter The method gd20 claim 22further comprising the step of reacting the second stream in a second reactor with at least one of additional homogeneous catalyst, additional heterogeneous catalyst, and additional alcohol to form a second reaction mixture.


In one embodiment there may be multiple reactors arranged in a way to allow for taking one or more reactor s offline while the heterogeneous catalyst in one amberoyst more different reactor s is regenerated. Year of fee payment: In one embodiment, amberlywt portion of alcohol, water and homogenous catalyst 11 are removed from the second reaction mixture 10 contained in unit by decantation, leaving a principally dry reaction mixture The reactor may have freeboard space above the catalyst bed to allow for catalyst movement and expansion as known to those skilled in the art.

The method of claim 1wherein the feedstock, alcohol, and homogeneous catalyst flow downward through said reactor. In any embodiment, dry reaction mixture 7 may continue ambberlyst a transesterification process, alcohol may be recovered from stream 6 and a portion of homogenous catalyst may be recovered from either stream 6 or 7. Nd20 modifications and variations are considered to be within the scope of the principles of the invention defined by the claims. Alcohol levels greater than 30 molar excess typically provide minimal benefit for first stage reactions, although in some embodiments greater than 30 molar excess may be desirable.

One method of the invention, with reference to FIG.

Fatty acid distillate with a free fatty acid content of