53306-54-0Relevant articles and documents
Method for preparing high-carbon alcohol phthalate through ester exchange under catalytic action of titanium chelates
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Paragraph 0015-0021, (2019/01/08)
The invention relates to a method for preparing high-carbon alcohol phthalate through ester exchange under a catalytic action of titanium chelates. Low-carbon alcohol phthalates, such as dimethyl phthalate, dicthyl ortho-phthalate and di-n-butyl phthalate, and high-carbon alcohols, such as isononyl alcohol, isodecano and 2-propyl heptanol, are taken as raw materials; titanium chelates of nitrogen-nitrogen bidentate ligands, such as phenanthroline, 2,2'-dipyridyl, quadrol, N,N- dimethyl ethylenediamine, N,N'- dimethyl ethylenediamine, N,N,N'N'- tetramethylethylenediamine and 1,2-cyclohexanediamine, are taken as catalysts; the dosage of the catalysts is 0.01-0.1% of the mass of the low-carbon alcohol phthalates; the mole ratio of high-carbon alcohols to low-carbon alcohol phthalates is 2-4;the reaction temperature is at 160-220 DEG C; the reaction time is 2-5 hours; the maximal conversion rate of low-carbon alcohol phthalates and the maximal selectivity of high-carbon alcohol phthalateboth can reach up to above 99%. The method disclosed by the invention has the advantages of high stability of raw material storage and transportation, convenience in feeding, few side effects, low consumption of raw materials, no corrosion and less dosage of catalysts, and the like.
A preparing phthalic acid bis (2 - propyl heptyl) ester method
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Paragraph 0006; 0013-0023, (2020/02/08)
The invention relates to a method for preparation of phthalate di(2-propyl heptyl) ester(DPHP). Phthalic acid and 2-propylheptanol as raw materials are used for preparation of the DPHP, and the reaction is performed in the following two ways: (1) using toluene, xylene or a toluene and xylene mixture as a water-carrying agent, using one or more substance of char sulfonic acid, SO3H functionalized ionic liquid, sulfonic acid resin, phenylsulfonic acid, naphthalene sulfonic acid, trifluoromethanesulfonic acid, phosphotungstic heteropoly acid, heterpoly tungstosilicate, phospho-molybdic heteropolyacid, SO4/MxOy or S2O8/ MxOy solid super acid as a catalyst, reacting for 2 to 6 hours at 110 to 140 DEG C; and (2) reacting for 4 to 6 hours at 220 to 240 DEG C without external addition of the water carrying agent and the catalyst. By the two ways, the esterification rates of the phthalic acid both can reach above 99% to the highest degree. The method has the advantages of mild reaction conditions, and simple and convenient operation, and the like.
METHOD FOR PRODUCING CARBOXYLIC ACID ESTERS
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Page/Page column 6, (2011/10/19)
The invention relates to a method for producing carboxylic esters by converting a carboxylic acid or a carboxylic acid anhydride or a mixture thereof with an alcohol in a reaction system comprising one or more reactors, wherein reaction water is distilled as alcohol-water-azeotrope with the vapors, the vapors are at least partially condensed, the condensate is separated into an aqueous phase and an organic phase and said organic phase is supplied at least partially back into said reaction system. Components boiling lower than the alcohol are at least partially removed from said returned organic phase such as wherein components boiling lower than alcohol are evaporated and/or distilled off. An enrichment in the reaction system of by-products boiling lower than alcohol is avoided. Alcohol losses can be minimized by discharge currents.
