中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

3407 records (took 0.047 seconds)

    PREPARATION OF MALEIC ANHYDRIDE
    23.
    发明授权
    PREPARATION OF MALEIC ANHYDRIDE 失效

    公开(公告)号：KR810000332B1

    公开(公告)日：1981-04-20

    申请号：KR780000936

    申请日：1978-04-03

    Applicant: STANDARD OIL CO OHIO

    Inventor： BREMER N ,  MILBERGER E ,  WONG E

    IPC: C07D307/60

    Abstract: Maleic anhydride was prepd. by oxydation of n-butane, n-butene, 1,3-butadiene or these compd.'s mixt. with O2 at 250 - 600≦̸C vapor phase in the presence of improved catalyst which was composed of oxide of Ti and P necessarily and didn't comprised Ba. Thus, titanium dioxide 19.98 g, 85.4% phosphoric acid 28.69 g, vanadium pentoxide 84.2 g and distilled water 600 ml were mixed to make slurry. This aq. slurry was refluxed for 2 hr, evapd., dried at 110≦̸C for 12 hr, calcined at 427≦̸C for 2 hr and crushed to 10 - 30 mesh to give Til.OP1.0-Ox useful catalyst.

    XYLENE-FORMALDEHYDE RESIN COMPOSITION AND PROCESS
    24.
    发明授权
    XYLENE-FORMALDEHYDE RESIN COMPOSITION AND PROCESS 失效

    公开(公告)号：KR800001710B1

    公开(公告)日：1980-12-31

    申请号：KR770001947

    申请日：1977-08-22

    Applicant: STANDARD OIL CO OHIO

    Inventor： BALL L ,  AZIZ W ,  ROSEN I

    IPC: C08G10/02

    Abstract: Title resin with high mol. wt., low content, and high m. p., was prerd. by treating xylene with HCHO in the presence of an acid catalyst in a closed reaction vessel in the absened of air. Thus, 212 g m-xylene and 63.15 g p-formaldehyde were heated in a closed reaction vessel in the absence of air to 900C, mixed with 9.19 g HCIO4 and heated 3 hr while water was removed, giving after purifn. a polymer with softening point 1650C, glass temp. 1230C, mol. wt. 20,400, Gardner color 2, Brabender plasticorder torque at 35 rpm 830-650 mg after 13 min at 1800C, intrinsic viscosilty 0.12, and shore D hardness 84.

    CATALYST FOR UNSATURATED ACID PRODUCTION
    27.
    发明授权
    CATALYST FOR UNSATURATED ACID PRODUCTION 失效

    公开(公告)号：KR800000622B1

    公开(公告)日：1980-07-07

    申请号：KR770002413

    申请日：1977-10-18

    Applicant: STANDARD OIL CO OHIO

    Inventor： WHITE J ,  APPLEQUIST M ,  SHAW W

    IPC: B01J27/18

    Abstract: Metharylic acid (I) was prepd. from methacrolein(II) by oxidn. with mo1. 0 at 200-600≦̸C in the presence of a catalyst contg. an oxide of W,P,U,Mo, and Co, Rn, Cd, Sr. An aq. slurry of MoO3 86.2, 85 % H3Po4 7.7, V2O3 7.5, and NH4 paratungstate 10.8 was refluxed overnight, evapd., and dried overnight at 120≦̸C to prepare a catalyst giving 65.9 % conversion and 45.4 % selectivity in the oxidn. of II to I at 355≦̸C and contact time 4.8s.

    METHOD OF MANUFACTURING OF DINITRILES FROM THIO DINITRILES
    28.
    发明授权
    METHOD OF MANUFACTURING OF DINITRILES FROM THIO DINITRILES 失效

    公开(公告)号：KR790000725B1

    公开(公告)日：1979-06-28

    申请号：KR750002495

    申请日：1975-11-14

    Applicant: STANDARD OIL CO OHIO

    Inventor： CALLAHAN J L

    Abstract: Sulfur was eliminated from thiodinitriles, e.g., thiodipropionitrile, to give the resp. dinitrile, e.g., adiponitrile, by heating the thiodinitrile at 200-700≦̸C; the elimination could be strictly a thermal reaction or a reaction conducted in the presence of other gases, liqs. pr solids. Optimum conditions (from 105 examples) were 555≦̸C with bonded Cu flake present; 91.6% adiponitrile was obtained with 62.1% conversion.

Patent Agency Ranking