Patent application number | Description | Published |
20080293954 | Process For Synthesizing Trioxymethylene Using Ionic Liquid - The present invention relates to a process for synthesizing trioxymethylene, wherein an aqueous solution of formaldehyde is used as the reactant; and an acidic ionic liquid in an amount of from 0.01 to 10 wt % is used as a catalyst. | 11-27-2008 |
20090036715 | METHOD FOR PREPARING POLYMETHOXYMETHYLAL - This invention describes a method for preparing polymethoxymethylal. By this method, polymethoxymethylal is prepared by a catalytic reaction using methanol and trioxymethylene as reactants and using an ionic liquid as catalyst under a relatively moderate reaction condition. The catalyst of this invention has a high catalytic activity and a high conversion; the reaction process is simple, easy to be operated and has a strong controllability; the distribution of the products after reaction is superior and the utilization ratio of the raw materials is high. | 02-05-2009 |
20090156866 | Method for producing 1,2-propylene glycol using bio-based glycerol - This invention disclosed a method for producing 1,2-propylene glycol from bio-based glycerol. In this method, a CuO—CeO | 06-18-2009 |
20100056830 | METHOD FOR SYNTHESIZING POLYOXYMETHYLENE DIMETHYL ETHERS BY IONIC LIQUID CATALYSIS - The present invention discloses a method for synthesizing polyoxymethylene dimethyl ethers by ionic liquid catalysis. The method comprises synthesizing polyoxymethylene dimethyl ethers by using a functional acidic ionic liquid as catalyst and using methylal and trioxymethylene as reactant under a relative mild reaction condition. The invention has advantages of high catalyst activity and reaction conversion, simple reaction process, high operationability and controllability, as well as good product distribution and high raw material utilization ratio. | 03-04-2010 |
20110313202 | METHOD FOR PREPARING POLYOXYMETHYLENE DIMETHYL ETHERS BY ACETALATION REACTION OF FORMALDEHYDE WITH METHANOL - It is disclosed a method for preparing polyoxymethylene dimethyl ethers by continuous polymerization and acetalation reactions. The method may include two steps: performing a polymerization reaction of an aqueous formaldehyde solution under catalysis of an ionic liquid IL I to obtain a mixed aqueous solution of trioxymethylene and formaldehyde; and an acetalation reaction of the mixed aqueous solution of trioxymethylene and formaldehyde with methanol is performed under catalysis of an ionic liquid IL II to prepare polyoxymethylene dimethyl ethers. The method may use an aqueous formaldehyde solution as a starting material to prepare polyoxymethylene dimethyl ethers by continuous polymerization and acetalation reactions, achieving a high use ratio of formaldehyde. A film evaporator is used in the invention, realizing a rapid separation and recycling of the light components, with a high separation efficiency. The separation of the catalyst is simple, thereby realizing recycling of the catalyst. | 12-22-2011 |
20130303798 | PROCESS FOR SYNTHESIZING PHENYLACETIC ACID BY CARBONYLATION OF TOLUENE - A production process for substituted phenylacetic acids or ester analogues thereof is disclosed. In this process toluene or toluene substituted with various substituents, an alcohol, an oxidant and carbon monoxide are used as raw materials to obtain compounds comprising structure of phenylacetic acid ester or analogues thereof by catalysis of the complex catalyst formed from transition metal and ligand, and such compounds are hydrolyzed to obtain various substituted phenylacetic acid based compounds. This type of compounds and their derivatives serve as important fine chemicals used widely in the industries of pharmaceuticals, pesticides, perfume and the like. | 11-14-2013 |
20140114092 | SYSTEM AND METHOD FOR CONTINUOUSLY PRODUCING POLYOXYMETHYLENE DIMETHYL ETHERS - A system and method for producing polyoxymethylene dimethyl ethers (DMM | 04-24-2014 |
20140114093 | SYSTEM AND METHOD FOR CONTINUOUSLY PRODUCING POLYOXYMETHYLENE DIALKYL ETHERS - A reaction system and method for producing polyoxymethylene dialkyl ethers (RO(CH | 04-24-2014 |