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Class Information
Number: 203/71
Name: Distillation: processes, separatory > Plural distillations performed on same material
Description: Processes directed to utilizing at least two distilling operations to separate components present in the original mixture.

Sub-classes under this class:

Class Number Class Name Patents
203/84 And returning distillation product to a previous distillation zone 122
203/81 Distillation of initial distillate 120
203/85 Including the addition of water or steam 48
203/73 One a distillation under positive pressure or vacuum 169
203/72 One a filming distillation 95

Patents under this class:
1 2 3 4 5

Patent Number Title Of Patent Date Issued
8691054 Multi-stage flash evaporator Apr. 8, 2014
8680358 Methods for removing heavy hydrocarbons from extractive solvents Mar. 25, 2014
8636831 Process for monomer recovery from a polymerization process Jan. 28, 2014
8617359 Method for distilling a starting material and installation for carrying out said method Dec. 31, 2013
8603300 Fuel fractionation using membrane distillation Dec. 10, 2013
8597471 Heat driven concentrator with alternate condensers Dec. 3, 2013
8591705 Multi-effect evaporator Nov. 26, 2013
8586779 Method for producing methacrylic alkyl esters by way of azeotropic distillation Nov. 19, 2013
8551298 Processes for purifying silane Oct. 8, 2013
8551296 Process for preparing high-purity hexachlorodisilane Oct. 8, 2013
8524047 Method of dehydrating tolylenediamine and dehydrator Sep. 3, 2013
8524048 Processes for recovering silane from heavy-ends separation operations Sep. 3, 2013
8518245 Process for providing one or more streams Aug. 27, 2013
8440056 Heat integrated distillation apparatus May. 14, 2013
8440058 Method for concentrating nitrogen isotope May. 14, 2013
8435387 Small-scale method and apparatus for separating mixtures May. 7, 2013
8404085 Separation and purification of hydroquinone from crude mixtures thereof Mar. 26, 2013
8361518 Edible olive pomace oil concentrated in triterpenic acids, procedure of physical refining utilised for obtainment thereof and recovery of functional components present in the crude oil Jan. 29, 2013
8328996 Method and apparatus for desalinating water combined with power generation Dec. 11, 2012
8317982 FGEPSC (flared, gas exhaust, pneumatic, saturation and condensation) process and system Nov. 27, 2012
8282793 Continuous process for preparing neral in pure or enriched form Oct. 9, 2012
8282791 Desalination using low-grade thermal energy Oct. 9, 2012
8277614 Multi-stage flash desalination plant with feed cooler Oct. 2, 2012
8273220 Heat pump distillation Sep. 25, 2012
8246816 Zone or system for providing one or more streams Aug. 21, 2012
8207291 Process for devolatilization of polymer of an aromatic alkylene Jun. 26, 2012
8187361 Effluent gas recovery system in polysilicon and silane plants May. 29, 2012
8163139 Process for the distillative separation of mixtures comprising monoethylene glycol and diethylentriamine Apr. 24, 2012
8088258 Method for purifying and separating a krypton-xenon mixture by rectification and a device for carrying out said method Jan. 3, 2012
8080140 Process for debottlenecking a system for the separation of a conjugated diolefin Dec. 20, 2011
8075741 Water purification method, process and apparatus Dec. 13, 2011
8016981 Method and apparatus for purifying and separating a heavy component concentrate along with obtaining light gas isotopes Sep. 13, 2011
7922876 Method for processing an etching mixture which is formed during the production of highly pure silicon Apr. 12, 2011
7922875 Method and apparatus for enrichment of heavy oxygen isotopes Apr. 12, 2011
7922874 Multi-effect evaporator Apr. 12, 2011
7862692 Liquid evaporating method and device Jan. 4, 2011
7842321 Method of concentrating minor ingredient contained in oily matter obtained from plant tissue Nov. 30, 2010
7794564 Evaporation system Sep. 14, 2010
7790001 Method of corrosion prevention Sep. 7, 2010
7737318 Process for fine purification of 1-butenic streams Jun. 15, 2010
7708865 Vapor-compression evaporation system and method May. 4, 2010
7678227 Multi-stage flash evaporator Mar. 16, 2010
7598405 Method for the distillative processing of tetrahydrofuran Oct. 6, 2009
7582723 Process and apparatus for the polymerization of ethylene Sep. 1, 2009
7531067 Process for purification of 2-chloro-5-chloromethyl-1,3-thiazole May. 12, 2009
7527712 Method for the continuous purification by distillation of the solvent methanol, used in the synthesis of propylene oxide May. 5, 2009
7516627 Method for separating a krypton-xenon concentrate and a device for carrying out said method Apr. 14, 2009
7495124 Process for the production of very pure 2,4'-methylenediphenyl diisocyanate Feb. 24, 2009
7470350 Process for tritium removal from light water Dec. 30, 2008
7462263 Method for purifying hydrocyanic acid Dec. 9, 2008

1 2 3 4 5

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