A coproduct continuous dealkylation process is described in which 4-t-butoxy-n-butanol is contacted with acidic silica-alumina catalyst at temperatures in the 160-200°C range (reactor wall temperature) in the liquid hourly space velocity regime of 2:0 to 6:0 liter/liter catalyst/hr. to produce in a single reactor a mixture in which the ultimate product of conversion of the 4-t-butoxy-n-butanol is 1,4-butanediol (1,4-diol) and tetrahydrofuran (THF) present in a preselected ratio (mole %) of 1,4-diol to THF ranging from 7:3 to 3:7. The 1,4-diol produced is useful in the preparation of polyesters, e.g. polybutylene terephthalates, and THF is a useful intermediate in the manufacture of certain chemicals and plastics.
描述了一种副产品连续脱烷基工艺,在该工艺中,4-t-丁氧基-
正丁醇与酸性
二氧化硅-氧化铝催化剂在 160-200°C 的温度范围内(反应器壁温)接触,在 2:0 至 6:0 升/升催化剂/小时的液体时空速度条件下,在单个反应器中生成混合物,其中 4-t-丁氧基-
正丁醇的最终转化产物为
1,4-丁二醇(1,4
-二醇)和
四氢呋喃(THF)。在单个反应器中生成一种混合物,其中 4-叔丁氧基
正丁醇的最终转化产物是
1,4-丁二醇(1,4
-二醇)和
四氢呋喃(THF),1,4
-二醇和
四氢呋喃的预选比例(摩尔百分比)为 7:3 至 3:7。生成的 1,4
-二醇可用于制备聚酯,如聚
对苯二甲酸丁二醇酯,而 THF 则是制造某些
化学品和塑料的有用中间体。