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    Pour point reduction of middle distillates
    5.
    发明授权
    Pour point reduction of middle distillates 失效
    中间馏分的减少点

    公开(公告)号：US3876525A

    公开(公告)日：1975-04-08

    申请号：US37429273

    申请日：1973-06-28

    Applicant: TEXACO INC

    Inventor： MIH LI C ,  BRANDENBURG JOHN T

    IPC: B01J29/22 ,  C10G45/64 ,  C10G13/02

    CPC classification number: B01J29/22 ,  C10G45/64

    Abstract: The pour point of a middle distillate oil is reduced by contacting the oil at an elevated temperature and pressure in the presence of hydrogen with a catalyst comprising a noble metal on a support comprising mordenite having a silica:alumina mol ratio between 10 and 15 to 1 and an alkali metal content of less than 1.0 wt. %.

    Catalytic muffler construction for exhaust emissions control in an internal combustion engine system
    9.
    发明授权
    Catalytic muffler construction for exhaust emissions control in an internal combustion engine system 失效
    用于内燃机系统排气排放控制的催化消声器结构

    公开(公告)号：US3495950A

    公开(公告)日：1970-02-17

    申请号：US3495950D

    申请日：1964-05-20

    Applicant: TEXACO INC

    Inventor： BARBER EVERETT M ,  BRANDENBURG JOHN T ,  FROST RICHARD A

    IPC: B01D53/64 ,  B01D53/94 ,  F01N3/24 ,  F01N3/28 ,  F01N3/32 ,  F01N3/34 ,  F02D9/04 ,  B01J9/04 ,  B01D53/34 ,  F01N3/16

    CPC classification number: F01N3/2835 ,  B01D53/64 ,  B01D53/944 ,  F01N3/24 ,  F01N3/2803 ,  F01N3/2825 ,  F01N3/2842 ,  F01N3/285 ,  F01N3/32 ,  F01N3/34 ,  F01N2260/14 ,  F01N2330/06 ,  F01N2330/10 ,  F01N2330/14 ,  F01N2510/06 ,  F01N2570/02 ,  F02D9/04 ,  Y02A50/2343 ,  Y02T10/20 ,  Y10S55/30

    Abstract: 1289652 Purifying and silencing I C engine exhaust gases TEXACO DEVELOPMENT CORP 27 Jan 1970 3821/70 Heading F1B Exhaust gases are purified by adding air thereto adjacent to the exhaust ports, maintaining a back pressure in the exhaust system at lower engine speeds above idling speed higher than would normally occur at these speeds by means of a valve 13 which is open at higher engine speeds and passing the gases through a catalytic reactor and silencer 12. The reactor and silencer 12 comprises a cylindrical or elliptical casing 12 1 having an inlet 24 and an outlet 25 and containing a plurality of sections 26 of fibrous material supporting at least an oxidation catalyst. The sections 26 have aligned central apertures of substantially the same diameter as the casing inlet 29 and outlet 25 and the fibrous material is twisted to provide a substantially helical orientation of the fibres in each section, adjoining sections having different helix angles to impart turbulence to the gases flowing through the sections. The air is supplied through tubes 14 1 , Fig. 1α (not shown), extending through the exhaust manifold 11 into the cylinder head exhaust passages (15') by an engine driven air pump 14. The air may be pre-heated by use to cool parts of the engine. The valve 13 may be operated to provide a back pressure at least 1À05 times atmospheric, preferably 1À125 times. The ratio of the total volume of the reactor and silencer 12 and the exhaust system upstream thereof to the engine displacement may be between 1À5 and 3À4. The sections 26 may comprise fibres in the form of refractory or ceramic filaments or metal wires which may be randomly woven or interlaced and a woven metal fabric may hold a metal wool or knitted mesh in a desired form. The fibre material may be steel, copper, nickel, titanium or glass, preferably stainless steel wool having a thickness of 4 to 7 mm and a width of 8 to 12 mm. The sections 26 may have an adherent layer of alumina deposited thereon by contact with a solution of sodium or potassium aluminate which may also coat the inside of the casing 12' to bond the sections thereto. The alumina is impregnated with one or more catalysts, e.g. nickel, platinum, iron cobalt, copper, vanadium, chromium, and calcined at a suitable temperature. Vanadium pentoxide and a copper oxide-copper chromite complex may be used in combination either with the vanadium pentoxide upstream of the complex or deposited together. Phosphorus of chromium containing compounds which remove reactive lead compounds in the exhaust gases may be deposited on fibre sections upstream of sections having an oxidation catalyst. Preferably one half to three quarters of the fibrous material is impregnated with oxidation catalyst and the remaining material impregnated with a lead removing compound. Methods of deposition and conditioning of the catalyst and impregnation with lead removing compounds are given in the Specification. Reference has been directed by the Comptroller to Specifications 1058706 and 1063091.

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