WO2007006370A1 - Filter device - Google Patents

Filter device Download PDF

Info

Publication number
WO2007006370A1
WO2007006370A1 PCT/EP2006/005076 EP2006005076W WO2007006370A1 WO 2007006370 A1 WO2007006370 A1 WO 2007006370A1 EP 2006005076 W EP2006005076 W EP 2006005076W WO 2007006370 A1 WO2007006370 A1 WO 2007006370A1
Authority
WO
WIPO (PCT)
Prior art keywords
tube
fuel
baffle
disc
outlet conduit
Prior art date
Application number
PCT/EP2006/005076
Other languages
French (fr)
Inventor
Giorgio Girondi
Original Assignee
Ufi Filters S.P.A.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ufi Filters S.P.A. filed Critical Ufi Filters S.P.A.
Publication of WO2007006370A1 publication Critical patent/WO2007006370A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/13—Supported filter elements
    • B01D29/15—Supported filter elements arranged for inward flow filtration
    • B01D29/21—Supported filter elements arranged for inward flow filtration with corrugated, folded or wound sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/04—Supports for the filtering elements
    • B01D2201/0415—Details of supporting structures

Definitions

  • the present invention relates to a filter device in accordance with the introduction to claim 1.
  • the present invention relates to a filter device having a pleated filtering baffle for filtering fuel.
  • Pleated filtering baffles which usually present a closed star configuration, are known to be widely used in filter cartridges for fuel filters because of their large filtering surface obtainable within a small volume, such as that available in the usual cartridge containing containers. Moreover, said filtering baffles are often made of easily obtainable low- cost materials, such as those based on cellulose. Unfortunately, those filtering baffles made of cellulose-based materials tend, because of their continuous contact with fuel, to absorb in time a part of the fuel passing through them. This results in a progressive expansion of their surface during filtration.
  • the pleated baffle of closed star configuration is fixed to a rigid structure forming the filter cartridge and comprising a cylindrical support tube positioned centrally within the baffle, which encloses it, and to a lower and upper disc which are sealedly fixed to the opposite ends of the tube and baffle.
  • the cartridge is formed by the tube and by the two discs fixed to its ends, the baffle being positioned between the two discs, about the tube.
  • This arrangement prevents the baffle from extending axially (elongating), as the distance between the discs, to which the baffle is sealedly secured, is fixed and equal to the height of the tube, which is also fixed to the discs.
  • a filter device provided with a cartridge comprising a filtering baffle of known type able to expand following fuel absorption, which preserves the quantity of active filtering surface of the baffle with time, while preventing substantial increase in pressure drop deriving therefrom, and which therefore enables the filter cartridge to be used for a longer time, with consequent advantages in terms of cost (because its replacement frequency is reduced) and of environmental impact (as the cartridge with filtering baffle is replaced only after the baffle has been totally used).
  • the object of the present invention is to provide a filter device having structural and functional characteristics such as to satisfy said requirements while at the same time obviating the stated drawbacks with regard to the known art.
  • Figure 1 is an axial section through a first embodiment of a filter device according to the present invention
  • Figure 2 is a front view of a filtering baffle used in the device of Figure 1 ;
  • Figure 3 is a section on the line Ill-Ill of Figure 2;
  • Figures 4A and 4B are a perspective view of a tube used in the device of Figure 1 , shown mounted and demounted respectively;
  • Figures 5A and 5B are respectively a perspective view and an axial section of a different tube in accordance with a second embodiment.
  • the reference numeral 1 indicates overall a diesel fuel filter device in accordance with the present invention.
  • the filter device 1 or simply filter, comprises essentially a container 11 , an upper cover 12 sealedly fixed on the container 11 by a ring nut 13 or by seam-joining, an inlet conduit 14 for the diesel fuel to be filtered, an outlet conduit 15 for the filtered diesel fuel and a filter cartridge 2 inserted into the interior of the container 11.
  • the filter cartridge 2 ( Figures 1 , 2, 3) comprises a filtering baffle 22 of pleated closed star configuration, of known type, a hollow cylindrical tube 50, 60, described in detail hereinafter, provided with passage ports 57 and enclosed by the filtering baffle 22, and an upper disc 23 and lower disc 21.
  • Said tube 50 is fixed at its opposing ends to the upper disc 23 and to the lower disc 21 respectively, as is the filtering baffle 22.
  • Said discs 21 , 23 are sealedly fixed to the baffle 22 by gluing or fusion, in known manner.
  • the upper disc 23 presents a central hole acting as a seat for a seal ring 24 traversed by the outlet conduit 15 and providing a seal between the chamber 30 for the fuel to be filtered, outside the cartridge 2, and the filtered fuel chamber 40, inside the cartridge 2.
  • the lower disc 21 abuts against an annular ledge 16 provided in the interior of the container 11.
  • the tube 50, 60 is made extendable in order not to oppose the elongation of said filtering baffle 22 due to fuel absorption.
  • the tube 50 shown in Figures 4A and 4B, is made in two identical pieces 501 and 502 which are axially movable relative to each other.
  • Each piece 501 (or 502) presents a pair of opposing lugs 51 , each of which is provided with a slot 52 to receive corresponding insertion fixing means 53 of the remaining piece 502 (or 501 ).
  • the two pieces 501 and 502 become fixed together when the outer edges 511 of the lug 51 of one of the two pieces 501 (or 502) touch corresponding abutment surfaces 512 of the other piece 502 (or 501 ), and when the fixing means 53 of one piece 501 (or 502) are inserted into the corresponding slots 52 of the other piece 502 (or 501 ).
  • the fixing means 53 do not prevent the two pieces 501 and 502 from sliding axially, but restrain them only torsionally.
  • the tube 50 with its two pieces fixed together has a height equal to the height of the pleated filtering baffle 22.
  • the tube 60 is made in one piece having in its central part a plurality of circumferential apertures 61 which deform to enable the tube 60 to lengthen. Essentially, the tube 60 presents a portion made elastically deformable.
  • a portion of the tube 60 can be made in a spiral pattern.
  • the tubes 50, 60 have a hole 55 provided to disintegrate the bubbles which could endanger the priming of the feed pump, in accordance with the known art.
  • the tubes 50, 60 also present on that outer surface facing the baffle 22 a plurality of ribs 56 forming obligatory paths for the filtered fuel which is conveyed towards the centrally positioned ports 57, as known in this field.
  • the diesel fuel enters the filter 1 through the inlet conduit 14 and flows into the chamber 30, from where it is filtered through the filtering baffle 22 to reach the ports 57 and enter the chamber 40 inside the tube 50, 60, from whence it flows to the outlet conduit 15.
  • the hole 55 disintegrates any bubbles which pass through the baffle 22.
  • the surface of the filtering baffle 22 tends to expand and in the same manner the tube 50, 60 lengthens, to ensure uniformity of the star configuration and consequently stability of flow through the baffle 22.
  • Said tube 50, 60 also incorporates a seal between the upper disc 23 and the tube 50, so obliging any air bubbles to pass through the hole 55, to divide them into a multitude of microbubbles.
  • the filter device of the present invention satisfies requirements by overcoming the drawbacks stated in the introductory part of the present description with reference to the known art.
  • the fuel filter device of the present invention enables those filtering baffles usually employed in this sector, and which tend to expand during use, to be used even after lengthy contact with the fuel, without loss of filtering surface and hence without pressure drop increase, so enabling them to be used for a longer time than with traditional devices.
  • An expert of the art can apply numerous modifications and variants to the aforedescribed filter device in order to satisfy specific contingent requirements, all contained within the scope of protection of the invention, as defined by the following claims.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtration Of Liquid (AREA)

Abstract

Fuel filter device comprising a container provided with an inlet conduit for the fuel to be filtered and an outlet conduit for the filtered fuel, and, positioned in the container interior, a pleated filtering baffle which expands on absorbing fuel and centrally encloses a hollow cylindrical tube provided with passage ports, said tube and said baffle being sealedly fixed at their opposite ends to a first disc and to a second disc respectively, said fuel passing radially through said baffle before reaching via said ports the interior of the tube, from which it leaves through said outlet conduit, said tube being made extendable in order not to oppose the elongation of said filtering baffle due to fuel absorption.

Description

DESCRIPTION FILTER DEVICE
TECHNICAL FIELD The present invention relates to a filter device in accordance with the introduction to claim 1.
More particularly, the present invention relates to a filter device having a pleated filtering baffle for filtering fuel.
PRIOR ART
Pleated filtering baffles, which usually present a closed star configuration, are known to be widely used in filter cartridges for fuel filters because of their large filtering surface obtainable within a small volume, such as that available in the usual cartridge containing containers. Moreover, said filtering baffles are often made of easily obtainable low- cost materials, such as those based on cellulose. Unfortunately, those filtering baffles made of cellulose-based materials tend, because of their continuous contact with fuel, to absorb in time a part of the fuel passing through them. This results in a progressive expansion of their surface during filtration.
This expansion is however partly hindered by the fact that the pleated baffle of closed star configuration is fixed to a rigid structure forming the filter cartridge and comprising a cylindrical support tube positioned centrally within the baffle, which encloses it, and to a lower and upper disc which are sealedly fixed to the opposite ends of the tube and baffle.
Essentially, the cartridge is formed by the tube and by the two discs fixed to its ends, the baffle being positioned between the two discs, about the tube.
This arrangement, traditionally used in this art, prevents the baffle from extending axially (elongating), as the distance between the discs, to which the baffle is sealedly secured, is fixed and equal to the height of the tube, which is also fixed to the discs.
Consequently the expansion of the filtering baffle inevitably causes deformation of the pleats, prevented from elongating, such that the more outer folding lines assume a sinusoidal pattern, until adjacent baffle portions come into direct contact with each other. Under these conditions, the actively available filtering surface for the fuel to pass through the baffle is drastically reduced. There is a substantial increase in pressure drop. This makes it necessary to replace the filter cartridge, independently of the effective decay undergone material forming the baffle, so negatively affecting the filter life.
There is hence a strongly felt requirement for a filter device provided with a cartridge comprising a filtering baffle of known type able to expand following fuel absorption, which preserves the quantity of active filtering surface of the baffle with time, while preventing substantial increase in pressure drop deriving therefrom, and which therefore enables the filter cartridge to be used for a longer time, with consequent advantages in terms of cost (because its replacement frequency is reduced) and of environmental impact (as the cartridge with filtering baffle is replaced only after the baffle has been totally used). DISCLOSURE OF THE INVENTION
The object of the present invention is to provide a filter device having structural and functional characteristics such as to satisfy said requirements while at the same time obviating the stated drawbacks with regard to the known art.
This object is attained by a filter device in accordance with claim 1. The dependent claims define particularly advantageous preferred embodiments of the filter device of the invention.
BRIEF DESCRIPTION OF THE DRAWINGS
Further characteristics and the advantages of the present invention will be apparent on reading the ensuing description given by way of non-limiting example with reference to the figures of the accompanying drawings, in which: Figure 1 is an axial section through a first embodiment of a filter device according to the present invention;
Figure 2 is a front view of a filtering baffle used in the device of Figure 1 ;
Figure 3 is a section on the line Ill-Ill of Figure 2;
Figures 4A and 4B are a perspective view of a tube used in the device of Figure 1 , shown mounted and demounted respectively;
Figures 5A and 5B are respectively a perspective view and an axial section of a different tube in accordance with a second embodiment.
BEST MODE FOR CARRYING OUT THE INVENTION With reference to Figure 1 , the reference numeral 1 indicates overall a diesel fuel filter device in accordance with the present invention. The filter device 1 , or simply filter, comprises essentially a container 11 , an upper cover 12 sealedly fixed on the container 11 by a ring nut 13 or by seam-joining, an inlet conduit 14 for the diesel fuel to be filtered, an outlet conduit 15 for the filtered diesel fuel and a filter cartridge 2 inserted into the interior of the container 11.
The filter cartridge 2 (Figures 1 , 2, 3) comprises a filtering baffle 22 of pleated closed star configuration, of known type, a hollow cylindrical tube 50, 60, described in detail hereinafter, provided with passage ports 57 and enclosed by the filtering baffle 22, and an upper disc 23 and lower disc 21. Said tube 50 is fixed at its opposing ends to the upper disc 23 and to the lower disc 21 respectively, as is the filtering baffle 22. Said discs 21 , 23 are sealedly fixed to the baffle 22 by gluing or fusion, in known manner. The upper disc 23 presents a central hole acting as a seat for a seal ring 24 traversed by the outlet conduit 15 and providing a seal between the chamber 30 for the fuel to be filtered, outside the cartridge 2, and the filtered fuel chamber 40, inside the cartridge 2. The lower disc 21 abuts against an annular ledge 16 provided in the interior of the container 11. According to the present invention, the tube 50, 60 is made extendable in order not to oppose the elongation of said filtering baffle 22 due to fuel absorption.
In a first embodiment the tube 50, shown in Figures 4A and 4B, is made in two identical pieces 501 and 502 which are axially movable relative to each other. Each piece 501 (or 502) presents a pair of opposing lugs 51 , each of which is provided with a slot 52 to receive corresponding insertion fixing means 53 of the remaining piece 502 (or 501 ). The two pieces 501 and 502 become fixed together when the outer edges 511 of the lug 51 of one of the two pieces 501 (or 502) touch corresponding abutment surfaces 512 of the other piece 502 (or 501 ), and when the fixing means 53 of one piece 501 (or 502) are inserted into the corresponding slots 52 of the other piece 502 (or 501 ).
The fixing means 53 do not prevent the two pieces 501 and 502 from sliding axially, but restrain them only torsionally. The tube 50 with its two pieces fixed together has a height equal to the height of the pleated filtering baffle 22. In a different embodiment, shown in Figures 5A and 5B, the tube 60 is made in one piece having in its central part a plurality of circumferential apertures 61 which deform to enable the tube 60 to lengthen. Essentially, the tube 60 presents a portion made elastically deformable. As an alternative to the circumferential apertures 61 a portion of the tube 60 can be made in a spiral pattern.
In both the two embodiments, the tubes 50, 60 have a hole 55 provided to disintegrate the bubbles which could endanger the priming of the feed pump, in accordance with the known art. The tubes 50, 60 also present on that outer surface facing the baffle 22 a plurality of ribs 56 forming obligatory paths for the filtered fuel which is conveyed towards the centrally positioned ports 57, as known in this field. In operation, the diesel fuel enters the filter 1 through the inlet conduit 14 and flows into the chamber 30, from where it is filtered through the filtering baffle 22 to reach the ports 57 and enter the chamber 40 inside the tube 50, 60, from whence it flows to the outlet conduit 15. The hole 55 disintegrates any bubbles which pass through the baffle 22. Because of the continuous contact with the fuel, the surface of the filtering baffle 22 tends to expand and in the same manner the tube 50, 60 lengthens, to ensure uniformity of the star configuration and consequently stability of flow through the baffle 22. Said tube 50, 60 also incorporates a seal between the upper disc 23 and the tube 50, so obliging any air bubbles to pass through the hole 55, to divide them into a multitude of microbubbles.
As will be apparent from that described, the filter device of the present invention satisfies requirements by overcoming the drawbacks stated in the introductory part of the present description with reference to the known art.
In this respect, the fuel filter device of the present invention enables those filtering baffles usually employed in this sector, and which tend to expand during use, to be used even after lengthy contact with the fuel, without loss of filtering surface and hence without pressure drop increase, so enabling them to be used for a longer time than with traditional devices. An expert of the art can apply numerous modifications and variants to the aforedescribed filter device in order to satisfy specific contingent requirements, all contained within the scope of protection of the invention, as defined by the following claims.

Claims

1. A fuel filter device (1 ) comprising a container (11 ) provided with an inlet conduit (14) for the fuel to be filtered and an outlet conduit (15) for the filtered fuel, and, positioned in the interior of the container (11 ), a pleated filtering baffle (22) which expands on absorbing fuel and centrally encloses a hollow cylindrical tube (50; 60) provided with passage ports (57), said tube (50; 60) and said baffle (22) being sealedly fixed at their opposite ends to a first disc (23) and to a second disc (21 ) respectively, said fuel passing radially through said baffle (22) before reaching via said ports (57) the interior of the tube (50; 60), from which it leaves through said outlet conduit (15), characterised in that said tube (50; 60) is made extendable in order not to oppose the elongation of said filtering baffle (22) due to fuel absorption.
2. A device (1 ) as claimed in claim 1 , wherein said filtering baffle (22) is made of a material comprising cellulose.
3. A device (1 ) as claimed in claim 1 , wherein said filtering baffle (22) presents a closed star configuration when viewed in cross-section.
4. A device (1 ) as claimed in claim 1 , wherein said outlet conduit (15) is fixed centrally to the container (11 ) and sealedly traverses the axial hole of the first disc (23).
5. A device (1 ) as claimed in claim 4, wherein said first disc (23) is arranged to sealedly slide relative to the outlet conduit (15) during expansion of the filtering baffle (22).
6. A device (1 ) as claimed in claim 4, wherein a seal ring (24) is interposed between said outlet conduit (15) and said hole of the first disc (23).
7. A device (1 ) as claimed in claim 1 , wherein said second disc (21 ) is positioned abutting against an annular ledge (16) provided in the interior of the container (11 ).
8. A device (1 ) as claimed in claim 1 , wherein said tube (60) presents an elastically deformable portion.
9. A device (1 ) as claimed in claim 8, wherein said elastically deformable portion is positioned centrally.
10. A device (1 ) as claimed in claim 9, wherein said portion presents a plurality of circumferential apertures (61 ) which enable the tube (60) to lengthen.
11. A device (1 ) as claimed in claim 1 , wherein said tube (50) is made in two mutually cooperating complementary pieces (501 , 502) axially movable relative to each other.
12. A device (1 ) as claimed in claim 11 , wherein each piece (501 , 502) is provided with a pair of opposing slots (52) and insertion fixing means
(53), which respectively receive the corresponding insertion fixing means (53) and are inserted into the corresponding slots (52) of the other piece (502, 501 ).
13. A fuel filter cartridge (2) comprising a pleated filtering baffle (22) which expands on absorbing fuel, a hollow cylindrical tube (50; 60) provided with passage ports (57) and enclosed by said baffle (22), a first disc (23) and a second disc (21 ), said tube (50; 60) and said baffle (22) being sealedly fixed at their opposing ends to said first and second disc (21 , 23) respectively, characterised in that said tube (50; 60) is made extendable in order not to oppose the elongation of said filtering baffle (22) due to fuel absorption.
PCT/EP2006/005076 2005-07-11 2006-05-26 Filter device WO2007006370A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITRE2005A000078 2005-07-11
ITRE20050078 ITRE20050078A1 (en) 2005-07-11 2005-07-11 FILTERING DEVICE

Publications (1)

Publication Number Publication Date
WO2007006370A1 true WO2007006370A1 (en) 2007-01-18

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ID=37109379

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2006/005076 WO2007006370A1 (en) 2005-07-11 2006-05-26 Filter device

Country Status (2)

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IT (1) ITRE20050078A1 (en)
WO (1) WO2007006370A1 (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008040799A1 (en) 2008-07-28 2008-12-11 Basf Se Separating a three carbon precursor compound of acrylic acid as main component containing acrylic acid and as byproduct containing glyoxal, in a product mixture of a heterogeneously catalyzed partial gas phase oxidation
DE102009027401A1 (en) 2009-07-01 2010-02-18 Basf Se Separating acrylic acid comprises cooling product gas mixture of partial gas phase oxidation of three carbon precursor compound in cooler and providing cooled product gas mixture with (non)evaporated cooling liquid into absorption column
DE102008041573A1 (en) 2008-08-26 2010-03-04 Basf Se Separating acrylic acid and glyoxal from gaseous product mixture of gas phase oxidation of a three carbon-precursor compound of acrylic acid comprises producing a liquid phase containing acrylic acid and glyoxal, and separating glyoxal
WO2011000808A2 (en) 2009-07-01 2011-01-06 Basf Se Method for separating acrylic acid from the product gas mixture of a heterogeneously catalyzed partial gas phase oxidation of at least one c3-precursor compound
DE102010001228A1 (en) 2010-01-26 2011-02-17 Basf Se Separating acrylic acid from a product gas mixture of heterogeneously catalyzed partial gas phase oxidation of a precursor compound to acrylic acid comprises cooling product gas mixture and adding cooled mixture into absorption column
WO2012045738A1 (en) 2010-10-08 2012-04-12 Basf Se Process for inhibiting unwanted free-radical polymerization of acrylic acid present in a liquid phase p
US8299299B2 (en) 2008-07-28 2012-10-30 Basf Se Process for separating acrylic acid present as a main constituent and glyoxal present as a by-product in a product gas mixture of a partial heterogeneously catalyzed gas phase oxidation of a C3 precursor compound of acrylic acid
WO2013000807A1 (en) 2011-06-29 2013-01-03 Mahle International Gmbh Filter element, in particular for fuel filters, and associated support body
DE102013004284A1 (en) * 2013-03-13 2014-09-18 Mann + Hummel Gmbh Filter device and filter element for a filter device
US10413851B2 (en) 2014-07-03 2019-09-17 Donaldson Company, Inc. Fuel filter with water separator
CN113999883A (en) * 2021-11-05 2022-02-01 地标(深圳)生物科技有限公司 Production method of collagen tripeptide for skin repair
US11612843B2 (en) 2015-06-26 2023-03-28 Donaldson Company, Inc. Composite media for fuel streams

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2218921A (en) * 1988-05-26 1989-11-29 Seitz Filter Werke Filter element
DE10301843A1 (en) * 2003-01-20 2004-07-29 Mann + Hummel Gmbh Filter, used as filter cartridge, comprises filter element having central channel containing middle pipe which extends between lid and base

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2218921A (en) * 1988-05-26 1989-11-29 Seitz Filter Werke Filter element
DE10301843A1 (en) * 2003-01-20 2004-07-29 Mann + Hummel Gmbh Filter, used as filter cartridge, comprises filter element having central channel containing middle pipe which extends between lid and base

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008040799A1 (en) 2008-07-28 2008-12-11 Basf Se Separating a three carbon precursor compound of acrylic acid as main component containing acrylic acid and as byproduct containing glyoxal, in a product mixture of a heterogeneously catalyzed partial gas phase oxidation
US8299299B2 (en) 2008-07-28 2012-10-30 Basf Se Process for separating acrylic acid present as a main constituent and glyoxal present as a by-product in a product gas mixture of a partial heterogeneously catalyzed gas phase oxidation of a C3 precursor compound of acrylic acid
DE102008041573A1 (en) 2008-08-26 2010-03-04 Basf Se Separating acrylic acid and glyoxal from gaseous product mixture of gas phase oxidation of a three carbon-precursor compound of acrylic acid comprises producing a liquid phase containing acrylic acid and glyoxal, and separating glyoxal
DE102009027401A1 (en) 2009-07-01 2010-02-18 Basf Se Separating acrylic acid comprises cooling product gas mixture of partial gas phase oxidation of three carbon precursor compound in cooler and providing cooled product gas mixture with (non)evaporated cooling liquid into absorption column
WO2011000808A2 (en) 2009-07-01 2011-01-06 Basf Se Method for separating acrylic acid from the product gas mixture of a heterogeneously catalyzed partial gas phase oxidation of at least one c3-precursor compound
DE102010001228A1 (en) 2010-01-26 2011-02-17 Basf Se Separating acrylic acid from a product gas mixture of heterogeneously catalyzed partial gas phase oxidation of a precursor compound to acrylic acid comprises cooling product gas mixture and adding cooled mixture into absorption column
WO2012045738A1 (en) 2010-10-08 2012-04-12 Basf Se Process for inhibiting unwanted free-radical polymerization of acrylic acid present in a liquid phase p
US9212122B2 (en) 2010-10-08 2015-12-15 Basf Se Process for inhibiting unwanted free-radical polymerization of acrylic acid present in a liquid phase P
DE102011078364A1 (en) 2011-06-29 2013-01-03 Mahle International Gmbh Filter element, in particular for fuel filter, and associated support body
WO2013000807A1 (en) 2011-06-29 2013-01-03 Mahle International Gmbh Filter element, in particular for fuel filters, and associated support body
DE102013004284A1 (en) * 2013-03-13 2014-09-18 Mann + Hummel Gmbh Filter device and filter element for a filter device
DE102013004284B4 (en) * 2013-03-13 2020-08-20 Mann+Hummel Gmbh Filter device and filter element for a filter device
US10413851B2 (en) 2014-07-03 2019-09-17 Donaldson Company, Inc. Fuel filter with water separator
US11612843B2 (en) 2015-06-26 2023-03-28 Donaldson Company, Inc. Composite media for fuel streams
CN113999883A (en) * 2021-11-05 2022-02-01 地标(深圳)生物科技有限公司 Production method of collagen tripeptide for skin repair
CN113999883B (en) * 2021-11-05 2024-01-30 地标(深圳)生物科技有限公司 Production method of collagen tripeptide for skin repair

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