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108 条记录 (耗时 0.015 秒)

    6.
    发明专利
    失效

    公开(公告)号：JPH11510728A

    公开(公告)日：1999-09-21

    申请号：JP51495796

    申请日：1995-11-04

    IPC分类号： B01J8/38 ,  B01J8/10 ,  B01J19/28 ,  C07B41/02 ,  C07C29/70 ,  C07C31/32 ,  C07C35/46 ,  C07C37/66 ,  C07C39/44

    摘要： PCT No. PCT/DE95/01552 Sec. 371 Date Mar. 10, 1997 Sec. 102(e) Date Mar. 10, 1997 PCT Filed Nov. 4, 1995 PCT Pub. No. WO96/14150 PCT Pub. Date May 17, 1996The invention is directed to an apparatus for contacting in a reactor solids in the form of free-flowing lumps with liquids or for contacting solids with liquids and gases by bringing the reactants into contact with each other, said reactor comprising a housing containing a screen in the area of which contacting takes place wherein the screen is a rotary screen drum 5, the screen drum 5 rotates in a bottom vat during the operation, said vat holding a gaseous or liquid medium reacting with the solids, and the bottom vat 10 can be lowered such that the solids in the screen drum 5 and the medium in the bottom vat 10 can be separated from each other whenever it is desired to alter or interrupt the chemical reaction or physical process.

    PRODUCTION OF PHENOLIC COMPOUND
    9.
    发明专利
    PRODUCTION OF PHENOLIC COMPOUND 失效

    公开(公告)号：JPH03178947A

    公开(公告)日：1991-08-02

    申请号：JP9588290

    申请日：1990-04-10

    申请人： YOSHITOMI PHARMACEUTICAL

    发明人： IWAI MASAYUKI ,  YONEZAWA DAIGAKU ,  MISHIMA AKIO

    IPC分类号： C07C37/66 ,  C07C39/235 ,  C07C51/15 ,  C07C65/05

    摘要： PURPOSE:To obtain a salicylic acid derivative by dissolving a 2,4-dialkylphenol and an alkali metal hydroxide in a lower alcohol, reacting, distilling out the lower alcohol and generated water to obtain an anhydrous alkali metal salt of the dialkylphenol and reacting CO2 with the resultant salt. CONSTITUTION:A 2,4-dialkylphenol and NaOH, etc., (solid or aqueous solution) are dissolved in a lower alcohol (e.g. 1-4C alkanol) in an amount of 0.2-3wt. times to the dialkylphenol at 50-60 deg.C and reacted, heated, then a mixture of distilled lower alcohol and water is removed to obtain an anhydrous alkali metal salt of the 2,4-dialkylphenol. Process of the distilling out is gradually performed in normal pressure for 2-5hr and further at 100-130 deg.C inner temperature in reduced pressure. Next, CO2 is blown into the resultant anhydrous salt and reacted in a pressure from reduced pressure to near atmospheric pressure with keeping at 130-150 deg.C to afford a 3,5-dialkylsalicyclic acid. Said compound is useful as color developer for pressure-sensitive recording paper.