JPS57157007A - Sound absorbing material - Google Patents

Sound absorbing material

Info

Publication number
JPS57157007A
JPS57157007A JP56043456A JP4345681A JPS57157007A JP S57157007 A JPS57157007 A JP S57157007A JP 56043456 A JP56043456 A JP 56043456A JP 4345681 A JP4345681 A JP 4345681A JP S57157007 A JPS57157007 A JP S57157007A
Authority
JP
Japan
Prior art keywords
sound absorbing
absorbing material
particles
acid catalyst
oxidation catalyst
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP56043456A
Other languages
Japanese (ja)
Inventor
Hidefusa Uchikawa
Hideharu Tanaka
Mutsuo Sekiya
Yasufumi Ohata
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP56043456A priority Critical patent/JPS57157007A/en
Priority to US06/300,552 priority patent/US4352853A/en
Priority to EP19820101405 priority patent/EP0061008B1/en
Priority to DE8282101405T priority patent/DE3262251D1/en
Publication of JPS57157007A publication Critical patent/JPS57157007A/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/16—Selection of particular materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/02—Impregnation, coating or precipitation
    • B01J37/024—Multiple impregnation or coating
    • B01J37/0246—Coatings comprising a zeolite

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)

Abstract

PURPOSE:To obtain a corrosion resistant, sound absorbing material by using the material which contains heat-resistant binder, containing oxidation catalyst and solid acid catalyst, in addition, containing either one of reducing agent or alkaline agent, as a sound absoring material. CONSTITUTION:The base of a sound absorbing material containing particles 1 of porous metallic body, is made by coating heat-resistant binder 5, which contains particles 4 containing either at least one of reducing material or alkaline agent, as well as containing oxidation catalyst particle 2 which are active at low temp. and solid acid catalyst particle 3, therein. In such a sound absorbing material, the oxidation catalyst particles are activated by the temperature of an exhaust gas to oxidize and decompose combustion residues. On the other hand, the reducing agent or an alkaline agent prevents the reaction to deposit tar from tar- forming constitutent by polymerization on the surface of a sound absorbing material, and also the formation high molecular weight polymer is retarded. A solid, acid catalyst performs a cracking function to change heavy oil to light one. By the functions as mentioned above, the sound absorbing material will not be corroded.
JP56043456A 1981-03-17 1981-03-24 Sound absorbing material Pending JPS57157007A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP56043456A JPS57157007A (en) 1981-03-24 1981-03-24 Sound absorbing material
US06/300,552 US4352853A (en) 1981-03-17 1981-09-09 Sound absorber
EP19820101405 EP0061008B1 (en) 1981-03-17 1982-02-24 Sound absorber
DE8282101405T DE3262251D1 (en) 1981-03-17 1982-02-24 Sound absorber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56043456A JPS57157007A (en) 1981-03-24 1981-03-24 Sound absorbing material

Publications (1)

Publication Number Publication Date
JPS57157007A true JPS57157007A (en) 1982-09-28

Family

ID=12664199

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56043456A Pending JPS57157007A (en) 1981-03-17 1981-03-24 Sound absorbing material

Country Status (1)

Country Link
JP (1) JPS57157007A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58190510A (en) * 1982-04-08 1983-11-07 ユニオン・カーバイド・コーポレーション Suppression of corrosion of muffler

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5024184A (en) * 1973-06-21 1975-03-15
JPS5088422A (en) * 1973-12-13 1975-07-16
JPS5482250A (en) * 1977-12-14 1979-06-30 Nakamatsu Yoshiro Easy spectacles
JPS54151724A (en) * 1978-05-19 1979-11-29 Matsushita Electric Ind Co Ltd Automotive exhaust gas purifying device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5024184A (en) * 1973-06-21 1975-03-15
JPS5088422A (en) * 1973-12-13 1975-07-16
JPS5482250A (en) * 1977-12-14 1979-06-30 Nakamatsu Yoshiro Easy spectacles
JPS54151724A (en) * 1978-05-19 1979-11-29 Matsushita Electric Ind Co Ltd Automotive exhaust gas purifying device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58190510A (en) * 1982-04-08 1983-11-07 ユニオン・カーバイド・コーポレーション Suppression of corrosion of muffler
JPH0370092B2 (en) * 1982-04-08 1991-11-06 Yunion Kaabaido Chem Ando Purasuchitsukusu Co Inc

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