| 摘要 |
<p>PCT No. PCT/GB97/00653 Sec. 371 Date Sep. 10, 1999 Sec. 102(e) Date Sep. 10, 1999 PCT Filed Mar. 11, 1997 PCT Pub. No. WO98/40334 PCT Pub. Date Sep. 17, 1998The present invention provides a process for the preparation of 1,1-difluoro-1,4-dichlorobutane by reacting 1,1,1,4-tetrachlorobutane or 1,1,4-trichlorobut-1-ene with hydrogen fluoride in the vapor phase.</p> |
