133results about How to "No need for high temperature and high pressure" patented technology

The invention relates to a method for for preparing amine-terminated polyether by a leaving group method, including esterification reaction and amination reaction. The method comprises the following steps of: dropping the mixed solution of polyols and a catalyst into the mixed solution of chloro-carbonic ester and solvent, ventilating nitrogen, controlling the temperature of a reaction system not bigger than 20 degrees centigrade, heating the reaction liquid to 20-150 degrees centigrade after dropping, carrying out vacuum filtration after adequate reaction to obtain the solvent-containing carbonate seal end polyether; adding the solvent-containing carbonate seal end polyether into polyamine, stirring the same for 10-120 minutes under normal temperature and pressure, removing excess polyamine, solvent and by-product of mother solution by a molecular still at distillation temperature of 110-170 degrees centigrade and under pressure of 1*10<-2>Pa-200Pa, thereby obtaining the mine-terminated polyether containing carbamate group. The method for preparing amine-terminated polyether by the leaving group method disclosed by the invention has the advantages of mild reaction conditions, low operation cost, no high temperature and pressure and few by-product during the whole process, and is simple in process and by-product is easy remove.

The invention belongs to the field of UV photocatalytic chemical technology, and a unsaturated plant oil alkyl and its preparation method based on UV photocatalytic reactions is disclosed.This alkyl has the following formula (1) and formula (2). 1 It is a direct chain or branched alkane base of C1 to C4, R 2 For ‑H, 、Cl, ‑ch 3 , ‑Oh, hoch 3 , ‑C (CH 3 Cure 3 At least one of the waiting; n = 0 or 1; 1 <m; 0 <m+s <4; 6 <L+M+N+S+T <16; R 3 For ‑Oh, hch 3 At least one of ‑Cooh and other; A = 1 or 2; 0