Processes for Extraction of Sugar From Sugar-Bearing Plant Material

a technology of plant material and process, which is applied in the field of sugar production, can solve the problems of insufficient extraction, high cost of equipment, and severe limitations of processes, and achieves the effect of achieving maximum extraction

Inactive Publication Date: 2011-04-28
DOW BRASIL SUDESTE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these processes can often require equipment that is expensive and difficult to maintain, and still do not achieve maximal extraction.
These processes can be severely limited by cost and purification concerns.
Diffusion processes suffer from many of the same shortcomings as do milling processes: insufficiently high extraction, equipment intensivity, and cost and purification concerns.

Method used

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  • Processes for Extraction of Sugar From Sugar-Bearing Plant Material
  • Processes for Extraction of Sugar From Sugar-Bearing Plant Material
  • Processes for Extraction of Sugar From Sugar-Bearing Plant Material

Examples

Experimental program
Comparison scheme
Effect test

example 1

Properties of an Exemplary Surfactant

[0048]The sample of Nonionic Surfactant PO / EO Block Copolymer Having 20% EO Capping used in these Examples was determined to have the following physical properties:

Molecular weight:4050 g / mol, as calculated from themolecular weight of the initiator and theoxide units.Specific Gravity:1.024 g / mL at 25° C. as determined usingASTM D 892Pour point:−8° C. as determined using ASTM D 97Flash point:>180° C. (open cup), as determined usingASTM D 92Cloud points:23° C. at 1% aqueous14° C. at 10% aqueous49° C. for a solution of 5 g of surfactant in20 g of a solution of 25% diethyleneglycol butyl ether in waterAll cloud points determined using ASTM D 2024Viscosities:850 cSt at 25° C.386 cSt at 40° C.63 cSt at 100° C.All viscosities determined using ASTM 445 / 446

example 2

Formulation of a Concentrated Surfactant Solution

[0049]A concentrated surfactant solution was prepared by combining 15 parts by weight ethanol with 50 parts by weight Nonionic Surfactant PO / EO Block Copolymer Having 20% EO Capping. To this mixture was added 35 parts by weight water. The resulting concentrated surfactant solution had the following properties:

Specific Gravity:0.9998 g / mL at 25° C. as determined usingASTM D 892Pour point:−18° C. as determined using ASTM D 97Flash point:50° C. (open cup) as determined usingASTM D 9230° C. (closed cup), as determined usingASTM D 93Cloud points:46.2° C. at for 0.5% aqueous solution ofthe concentrated surfactant solutionNone determined over the range of 25° C.-90° C.for a solution of 5 g of the concentratedsurfactant solution in 20 g of a solution of25% diethylene glycol butyl ether in water78.0° C. for a solution of 12.7 g of theconcentrated surfactant solution in 11.2 gof 50% aqueous isopropanolAll cloud points determined using ASTM D 20...

example 3

Extraction of Sugar from Bagasse Samples from Mill #1

[0050]Bagasse samples were taken from Mill # 1, a sugar cane processing facility in Brazil. At Mill # 1, sugar cane material is subjected to six milling steps. Imbibition water is added only in the fifth and sixth milling steps. Samples 1A-1H of fresh bagasse were taken from the output of the fourth milling step, and used in an extraction study.

[0051]For each sample, the bagasse (200 g wet weight) was mixed by hand for about two minutes with water (61 g at 50° C.), with different amounts of the concentrated surfactant solution of Example 2 added thereto: 0 ppm (control), 25 ppm, 50 ppm and 100 ppm concentrated surfactant solution, all based on the mass of the water. (100 ppm concentrated surfactant solution is equivalent to about 50 ppm surfactant). The mixtures were pressed in a 125 kgf / cm2 press for 1 minute to extract juice. The extracted liquid was analyzed to determine sugar content using standard analytical processes of the ...

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Abstract

The invention provides processes for the extraction of sugar from sugar-bearing plant material such as sugar cane. Accordingly, in one aspect of the invention, a process for extracting sugar from sugar-bearing plant material comprises contacting the sugar-bearing plant material with an extractant solution comprising water and a surfactant; and separating the extractant solution from the sugar-bearing plant material. One example of a suitable surfactant is a poly(alkylene oxide) polymer such as a poly(propylene oxide) polymer, a poly(ethylene oxide) polymer, or a poly(propylene oxide) / (ethylene oxide) copolymer.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims priority to U.S. Provisional Patent Application Ser. No. 61 / 044,120, filed Apr. 11, 2008, which is hereby incorporated herein by reference in its entirety.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The invention relates generally to sugar production. The invention relates more particularly to processes for extracting sugar from sugar-bearing plant material.[0004]2. Technical Background[0005]Sugar is an important product, as it is used not only as a foodstuff but also as a raw material for the production of ethanol. Sugar is produced industrially by the extraction and purification of sugar from sugar-bearing plant materials. A variety of plants bear sugar. Currently, the industrially most important sugar-bearing plant is sugar cane. Sugar cane is a member of the Saccharum genus, which in turn is part of the grass family. It has a high agricultural yield and a high sugar content, and can be proce...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C12P7/06C13B10/14C13B50/00C13B10/00
CPCA23V2002/00C13B5/02C13B5/04C13B10/003C13B10/025C13K13/007Y02E50/17C13B35/02A23V2250/082A23V2250/628Y02E50/10
Inventor OLIVEIRA, ABELALENCAR, YURI
Owner DOW BRASIL SUDESTE IND
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