摘要:
A process for removing dimethylamine (DMA) before and/or during and/or after deacylation in a reaction vessel of a feed stream comprising a sucralose-6-acylate resulting from the chlorination of a sucrose-6-acylate in the presence of dimethyl formamide (DMF), wherein the deacylation is conducted at a first set of conditions of temperature, pH and pressure, the process comprising: (a) providing a side stream loop from and to the reaction vessel; (b) adjusting the conditions of one or more of temperature, pH, and pressure in the loop, and setting the flow rate through the loop, to remove DMA while minimising carbohydrate degradation.
摘要:
A method of inverting sucrose, including (i) determining an initial solids concentration of an aqueous sucrose solution, an initial bed volume of a sucrose inversion resin system, a minimum target inversion percentage, a maximum target inversion percentage, a target maximum hydroxymethylfuran (HMF) concentration, a minimum target pH, or a maximum target pH; (ii) contacting the sucrose inversion resin system with the aqueous sucrose solution under conditions of aqueous solution flow rate and aqueous solution temperature to produce an inverted sucrose solution having an inversion percentage, an HMF concentration, and a pH; (iii) observing an instantaneous inversion percentage, an instantaneous HMF concentration, or an instantaneous pH of the inverted sucrose solution; and, if appropriate; (iv) changing at least one of the aqueous solution flow rate or the aqueous solution temperature to yield a product having a desired inversion percentage, HMF concentration, and/or pH. An apparatus capable of performing the method.
摘要:
A method comprising: (a) providing a lignocellulosic substrate; (b) contacting said lignocellulosic substrate with an extractant comprising a water-soluble organic solvent to form an extracted substrate and a miscella; (c) removing miscella from said extracted substrate; and (d) hydrolyzing said extracted substrate using a chemically catalyzed process.
摘要:
We disclose a method of extracting an alcohol or furan from a predominantly liquid stream comprising the alcohol or furan, comprising removing cations from the predominantly liquid stream comprising the alcohol or furan, using a cation-exchange resin; removing anions from the predominantly liquid stream comprising the alcohol or furan, using an anion-exchange resin; and recovering alcohol or furan from the predominantly liquid stream comprising the alcohol or furan, using either a vapor permeation membrane, a perevaporation process, or both.
摘要:
Thermoplastic polyurethane (TPU) compositions are disclosed comprising TPU polymer, polyisocyanate, and a salt of zirconium phosphate. The compositions have enhanced thermal properties, good processability, and good hydrolysis resistance. Processes are also disclosed to combine the ingredients by melt mixing or to prepare the compositions in-situ as the TPU is being polymerized.
摘要:
A method of removing a carboxylic acid from a liquid that contains a tertiary amide solvent includes a step of contacting the liquid with an extraction medium comprising an amine. The amine is immiscible with both water and the tertiary amide solvent, and the contacting step forms a de-acidified phase containing the tertiary amide solvent and a phase containing the extraction medium and the carboxylic acid. Both the liquid that contains the tertiary amide solvent and the de-acidified phase may also contain a sucrose-6-acylate.
摘要:
A corn wet-milling process comprises steeping corn kernels in an aqueous liquid, which produces softened corn; milling the softened corn in a first mill, which produces a first milled corn; separating germ from the first milled corn, thereby producing a germ-depleted first milled corn; milling the germ-depleted first milled corn in a second mill, producing a second milled corn; separating the second milled corn into a first starch/protein portion that comprises starch and protein and a first fiber portion that comprises fiber, starch, and protein; milling the first fiber portion in a third mill, which produces a milled fiber material that comprises fiber, starch, and protein; separating at least some of the starch and protein in the milled fiber material from the fiber therein, producing a second fiber portion that comprises fiber and starch and a second starch/protein portion that comprises starch and protein; and contacting the second fiber portion with at least one enzyme to convert at least some of the starch therein to dextrose. The converted material is screened using one or more screens to separate the fiber from the liquor. The liquor can be fermented to ethanol, or refined to dextrose. The fiber can be pressed and dried as an animal feed.
摘要:
A process including steeping cereal kernels in an aqueous liquid, producing softened cereal; milling the softened cereal, producing a milled cereal comprising germ, protein, starch, and fiber; separating at least some of at least one material selected from the group consisting of germ, starch, and protein from the milled cereal, producing at least one of germ, starch, and a first protein portion, and also producing a first fiber portion that comprises fiber and starch, and a light steep water that comprises protein; separating at least some protein from the light steep water, producing a second protein portion and a process water that comprises protein; converting at least some of the starch in the first fiber portion to saccharides; separating at least some of the saccharides from the first fiber portion, producing saccharides and a second fiber portion that comprises fiber; and burning at least some of the fiber from the second fiber portion, producing a flue gas and a first quantity of energy; wherein the process further comprises at least one step selected from the group consisting of least partially powering at least one previous step with the first quantity of energy; and drying at least one separated material selected from the group consisting of the germ, the starch, the first protein portion, the second protein portion, and the saccharides with the flue gas, producing a dried separated material and a dryer exhaust. In one further embodiment, the process further includes digesting anaerobically the biologically available organic residues from the process water, producing a biogas and a final waste water. In a still further embodiment, the process further includes burning the biogas to produce a second quantity of energy and at least partially powering at least one previous step with the second quantity of energy.
摘要:
Whole grain, such as wheat, barley, rye, and/or rice, can be processed by (a) steeping the grain in an aqueous liquid to produce softened grain, (b) milling the softened grain to produce milled grain, (c) liquefying the milled grain by contacting it with amylase and heating it to a temperature of at least about 50° C., producing a liquefied material, (d) at least partially saccharifying the liquefied material by contacting it with amyloglucosidase at a temperature of at least about 50° C., producing a first saccharified material, and (e) separating fiber and germ from the first saccharified material, producing a screened material that is substantially free of fiber and germ. The process also includes the steps of (f) further saccharifying and fermenting the screened material with a microorganism that produces ethanol, thereby producing a broth that comprises ethanol, soluble protein, and insoluble protein, and (g) separating ethanol from the broth. A protein-rich product can be recovered from the broth that comprises both gluten from the grain and microorganism from the fermenting step.
摘要:
The invention provides a process for the preparation of aspartic acid via a fermentation process for the preparation of ammonia fumarate, wherein the pH of the fermentation broth is controlled by the addition of a calcium base to produce a calcium fumarate precipitate, characterized in that ammonium fumarate is produced by separating the precipitated calcium fumarate from the fermentation broth, and reacting the same with a reagent selected from ammonia, ammonium carbonate, ammonia in combination with CO.sub.2 and mixtures therefore, to form ammonium fumarate and a co-product selected from calcium carbonate and calcium hydroxide, wherein the energy of indirect neutralization of fumaric acid by ammonia serves as the driving force for the conversion of calcium fumarate to the desired ammonium fumarate product and for the regeneration of a calcium base reagent, and wherein diammonium fumarate is enzymatically converted to ammonium aspartate and acidulated to from aspartic acid.