PREPARATION OF ACID ANHYDRIDE ESTER POLYMERSPURPOSE:To effectively carry out the ester interchange reaction by reacting a specific polyalkylene ether with trimellitic acid anhydride in the presence of polyphosphoric acid.FUKAMI AKIRAMORIWAKI NORIMOTO
PERYLENE-3,4,9,10-TETRACARBOXYLIC ACID MONOANHYDRIDE-MONOIMIDES, PROCESS FOR THEIR PREPARATION AND THEIR USE not available for EP003948of corresponding document:Compounds of the formula in which R denotes hydrogen, hydroxyl, amino or optionally substituted alkyl, X denotes chlorine or bromine and n...
Into a 100 mL flask introduce 9 mL(0.1mol)of aniline,15 mL glacial aceticacid,and15 mL aceticanhydride.Notethat heat is evolved owing to the reaction of acetic anhydride withaniline.Attachthe flask to a reflux condenser and heat the solution to boil for 10minutes.Atthe end of thetime,cool...
AN EFFICIENT AND SIMPLE PROCEDURE FOR PREPARATION OF ESTERS AND ANHYDRIDES FROM ACID CHLORIDES IN THE PRESENCE OF 1,4-DIAZABICYCLO[2.2.2]OCTANE (DABCO) UND... A manipulatively one-pot and rapid method for the synthesis of aliphatic and aromatic ester and anhydride from acid chloride and alcoh...
The new preparation method of polymaleic acid from maleic anhydride by plasma-initiated polymerization in aqueous solution was studied. 本文研究了用等离子体引发马来酸酐水溶液聚合制备聚马来酸的新工艺。 word.hcbus.com 8. Objective producing the new preparation-hirudo injection and test its safty. 目的...
Ethyl glycidate (EG) was prepared in 50-60%- yield from ethyl acrylate by epoxidation with 90-% H202 and trifluoroacetic acid anhydride. Initiators. Gaseous boron trifluoride (Matheson Products) was used as supplied. Boron trifluoride- diethyl etherate (Aldrich Chemical Co.), antimony ...
CATALYSTS IN THE PREPARATION OF O-BENZOYLBENZOIC ACID AND ETHYLBENZENE... In the preparation of o-benzoylbenzoic acid from benzene and phthalic anhydride, ferric chloride is a much poorer catalyst than aluminum chloride, but an equimolecular mixture of ferric and aluminum chlorides, although less ac...
In this paper, cellulose acetate preparation conditions and under different conditions to compare the degree of substitution. Common in acetic acid as solvent, the use of acid catalyst, esterification with an appropriate amount of acetic anhydride, the temperature is not high, time is not often, ...
for drugs, pharmaceuticals and flavouring agents, said process comprising reacting an heteroaromatic compound selected from furan, thiophene and pyrrole with a C2-C5 acid anhydride as an acylating agent employing metal ion exchanged clays as catalysts at temperatures in the range of 0-130° C....
Coal gasification fine slag is a by-product of the entrained-flow gasifier, which has caused some environmental pollution. Through acid dissolution and calcination at different temperatures, mesoporous spherical silica/porous carbon composite filler was prepared using coal gasification fine slag. The parti...