发明名称 |
PROCESS FOR PREPARING ACID CHLORIDES CHLORINATED IN POSITION ALPHA |
摘要 |
Prodn. is effected by reacting the corresp. alpha-chloro acid anhydride (I) with (i) S and/or SCl2 and/or S2Cl2 and (ii) gaseous Cl2 in the presence of a Lewis acid catalyst. - (I) is pref. of formula (R1R2ClCCO)2O (where R1 is H, Cl or 1-18C alkyl and R2 is H or Cl), giving prods. of formula R1R2ClCCOCl. - The catalyst may be FeCl3, SnCl4, SbCl5, AlCl3 or AuCl3 (esp. FeCl3) and is pref. used in an amt. of 0.001-5 mole% based on (I). The amt. of reactant (i) is pref. within 10% of the stoichiometric amt., esp. 0.1-1% less than the stoichiometric amts. The total amt. of Cl is pref. 1-1.1 times the stoichiometric amt. The reaction temp. is pref. 20-200 deg.C. - By-prod. formation and pollution problems are reduced, since no HCl is formed and only 1 mole of SO2 is formed per 4 moles of (I).(0/0) |
申请公布号 |
HUT40990(A) |
申请公布日期 |
1987.03.30 |
申请号 |
HU19840001423 |
申请日期 |
1984.04.11 |
申请人 |
RHONE-POULENC SPECIALITES CHIMIQUES,FR |
发明人 |
CORREIA,YVES,FR;DRIVON,GILLES,FR |
分类号 |
C07C53/46;B01J27/00;C07B61/00;C07C51/00;C07C51/60;C07C53/48;C07C53/50;C07C67/00 |
主分类号 |
C07C53/46 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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