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Production of isoprene dimers

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专利汇可以提供Production of isoprene dimers专利检索,专利查询,专利分析的服务。并且Isoprene is dimerized by being caused to contact a catalyst which is a combination of: (I) a titanium compound (e.g., titanium tetrachloride); (II) a phosphorus or antimony compound constituting an electron-donor compound (e.g., triphenyl phosphite); and (III) an aluminum compound (e.g., diethylaluminum chloride). Titanium compound (I) is representable by the general formula TiXnY4 n or TiOX2, where each of X and Y is a halogen, an OR'''' group, an acetyl-acetonato group, or a chlorosulfonyl group, and n is an integer of 1 to 4, both inclusive. Phosphorous or antimony compound (II) is representable by the general formuls P(OR)3, PO(OR)3, or Sb(OR)3. Aluminum compound (III) is representable by the general formulas AIR''2Cl or Al2R''3Cl3. Each of R, R'', and R'''' is an alkyl, cycloalkyl, alkenyl, or aryl group.,下面是Production of isoprene dimers专利的具体信息内容。

  • 2. A process for producing isoprene dimers according to claim 1 in which the mole ratio of the phosphorous compound or antimony compound to the titanium compound is from 0.3 : 1 to 2 : 1, preferably from 0.5 : 1 to 1.5 : 1, and the mole ratio of the aluminum compound to the titanium compound is from 1 : 1 to 50 :
  • 3. A process for producing isoprene dimers according to claim 1 in which: said halogen is selected from the group consisting of chlorine, bromine, and iodine; said OR'''' group is a member selected from the group consisting of alkoxy groups, and aryloxy groups, of a carbon number of the order of from 1 to 10; and the carbon number of each of R and R'' is of the order of from 1 to 10.
  • 4. A process according to claim 2 in which said mole ratio of aluminum compound to titanium compound is from 3 : 1 to 10 : 1.
  • 5. A process according to claim 3 in which said alkoxy group is a lower alkoxy group and said aryloxy group is a phenoxy group.
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