METHOD FOR CONCENTRATING AND RECOVERING AQUEOUS SOLUTION OF A SURFACTANT

Title:

METHOD FOR CONCENTRATING AND RECOVERING AQUEOUS SOLUTION OF A SURFACTANT

Document Type and Number:

WIPO Patent Application WO/2013/024790

Kind Code:

A1

Abstract:

A method for concentrating and recovering an aqueous solution of a surfactant is provided whereby an aqueous solution of a surfactant having a high concentration of the surfactant can be efficiently and easily obtained by evaporating and concentrating the aqueous solution of a surfactant while suppressing foam formation. In said method, the aqueous solution of a surfactant comprising a gasifiable surfactant and a gasifiable aqueous solvent is evaporated and concentrated, and the surfactant is concentrated to a high degree. The aqueous solution of a surfactant is held inside an evaporator (12), the temperature of the aqueous solution of a surfactant inside the evaporator (12) is set to a temperature lower than the boiling point of the aqueous solvent under pressure in the evaporator (12), a portion of the aqueous solution of a surfactant is extracted from the evaporator (12), all of the surfactant and the aqueous solvent therein are superheated by a superheater (14) to achieve either an annular flow or an annular mist flow and then sprayed into the evaporator (12) from a nozzle (32) having a shape such that the outlet side first narrows then widens outward, and the aqueous solvent is evaporated and removed.

More Like This:

JP4478649	Microsphere
JP2978227	INDUSTRIAL APPLICABILITY: A biaxial screw type squeezing dehydration method and a dehydrator of a hydrous polymer containing a rubber component.
JP2011515545	Impact-resistant improved polycarbonate composition that has good natural color, hydrolysis stability, and melt stability.

Inventors:

FUTAGAWA NORIFUMI (JP)
NAGANO SHIGEYUKI (JP)

Application Number:

PCT/JP2012/070380

Publication Date:

February 21, 2013

Filing Date:

August 09, 2012

Export Citation:

Click for automatic bibliography generation Help

Assignee:

ASAHI GLASS CO LTD (JP)
FUTAGAWA NORIFUMI (JP)
NAGANO SHIGEYUKI (JP)

International Classes:

C08F6/14; B01D1/16

Foreign References:

JP2005131616A	2005-05-26
JPS5966302A	1984-04-14
JP2007283224A	2007-11-01

Other References:

"Kagaku Kogyo Binran sixth edition", THE SOCIETY OF CHEMICAL ENGINEERS, pages: 299
"Kagaku Kogyo Binran sixth edition", THE SOCIETY OF CHEMICAL ENGINEERS, pages: 298 - 299

Attorney, Agent or Firm:

SENMYO, Kenji et al. (JP)
Spring name Kenji (JP)

Download PDF:

View/Download PDF PDF Help

Claims:

Previous Patent: DRIVE CIRCUIT

Next Patent: DEVICE AND METHOD FOR DETECTING CHEMICAL AND PHYSICAL PHENOMENA