20548-62-3

Upstream product

• 50-32-8 benzopyrene 
• 85-44-9 phthalic anhydride 
• 2430-22-0 7-methyl-1-octanol 
• 131-11-3 phthalic acid dimethyl ester 
• 95-47-6 o-xylene 

Downstream Products

• 318292-43-2 1,2-cyclohexane dicarboxylic acid di-isononylester 

Relevant academic research and scientific papers

Method of forming phthalate-based ester compound

The present invention relates to a method for preparing a phthalate-based ester compound. More particularly, the present invention includes: a first step of providing a phthalic anhydride and an alcohol to a first reactor, followed by heating; and a second step of performing an esterification reaction by providing the first liquid mixture of the first step to a second reactor. The present invention can reduce the reaction time in the second reactor and improve the production amount of the phthalate-based ester compound.

Method for preparing high-carbon alcohol phthalate through ester exchange under catalytic action of titanium chelates

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 liquid phase oxidation of O-xylene with esterification coupling preparation of phthalic acid diester method

The invention relates to a method for preparation of diester phthalate by o-xylene liquid-phase oxidation and esterification coupling. In the presence of a catalyst, air or oxygen is used as an oxygen source for preparation of the diester phthalate by o-xylene liquid-phase oxidation and esterification coupling. The method has the advantages of mild reaction conditions, safe operation, low raw material and energy consumption, high conversion rate and high selectivity and the like.

METHOD FOR PRODUCING CARBOXYLIC ACID ESTERS AND THE USE THEREOF AS PLASTICIZERS

The present invention relates to a process for the production of carboxylic esters by reaction of carboxylic acids and/or carboxylic anhydrides with at least one alcohol selected from alkanols having at least 5 carbon atoms, cycloalkanols, and alkoxy-alkanols, in the presence of an acidic esterification catalyst. The invention further relates to the use of the resultant carboxylic esters as plasticizers or in a plasticizer composition for thermoplastic polymers and elastomers.

A manufacturing method for cyclohexane polyacid ester

The present invention provides a manufacturing method for cyclohexane polyacid ester, comprising an esterification step and a hydrogenation step. The esterification step is to esterify benzene polycarboxylic acid or anhydride thereof with alcohol to form a crude product of benzene polycarboxylic acid ester, in which the crude product of benzene polycarboxylic acid ester contains excess alcohol. The hydrogenation step is to hydrogenate the crude product of benzene polycarboxylic acids ester under no purification condition with excess alcohol in a catalyst-containing continuous fixed-bed reactor to form the cyclohexane polyacid ester. The manufacturing method for cyclohexane polybasic ester provided by the present invention can reduce purification processes which are complicate and energy-intensive. Furthermore, the hydrogenation is performed under a lower hydrogen pressure such that the process cost is effectively reduced and the hydrogenation rate of the benzene ring is higher than 99.9%.

Catalyst and process for hydrogenating aromatics

The present invention relates to an eggshell catalyst comprising an active metal selected from the group consisting of ruthenium, rhodium, palladium, platinum and mixtures thereof, applied to a support material comprising silicon dioxide, wherein the pore volume of the support material is 0.6 to 1.0 ml/g, determined by Hg porosimetry, the BET surface area is 280 to 500 m2/g, and at least 90% of the pores present have a diameter of 6 to 12 nm, to a process for preparing this eggshell catalyst, to a process for hydrogenating an organic compound which comprises at least one hydrogenatable group using the eggshell catalyst, and to the use of the eggshell catalyst for hydrogenating an organic compound.

PROCESSES FOR THE PRODUCTION OF ESTERS

A process for production of C4 to C15 esters by the esterification of a carboxylic acid or anhydride with a C4 to C15 alcohol including forming a reaction mixture of the acid or anhydride and the C4 to C15 alcohol including a stoichiometric excess of the alcohol and bringing the mixture to reaction temperature by providing an energy supply to the reaction to cause the mixture to react wherein initially the energy supply is reduced to reduce foaming and optionally the energy supply is subsequently increased to enhance reaction time.

DEGRADATION OF POLYCYCLIC AROMATIC HYDROCARBONS TO RENDER THEM AVAILABLE FOR BIODEGRADATION

A method for the degradation of polycyclic aromatic compounds is disclosed that involves dissolving ozone in a bipolar solvent comprising a non-polar solvent in which is of sufficiently non-polar character to solubilized the polycyclic aromatic compounds, and a polar-water-compatible solvent which is fully miscible with the non-polar solvent to form a single phase with the non-polar solvent. The bipolar solvent with dissolved ozone is contacted with the polycyclic aromatic compounds to solubilize the polycyclic aromatic compounds and react the dissolved polycyclic aromatic compounds with the ozone to degrade the dissolved polycyclic aromatic compounds to oxygenated intermediates. The bipolar solvent is then mixed with sufficient water to form separate non-polar and polar phases, the non-polar phase comprising the non-polar solvent and the polar phase comprising the non-polar solvent and the oxygenated intermediates. The polar phase is then diluted and incubated with bacteria to biodegrade the oxygenated intermediates.

Process for producing carboxylic acid esters and catalysts therefor

A process for producing carboxylic acid esters by the following steps: a) preparation of a reaction mixture containing an alcohol and a carboxylic acid and/or a carboxylic anhydride and/or a carboxylic acid ester and or a partially esterified carboxylic acid, b) heating of this mixture to the suitable reaction temperature in the presence of a solid polysiloxane insoluble in the reaction medium and having sulphonic acid groups with intensive thorough mixing accompanied by continuous separation of the reaction water which forms, wherein the polysiloxane used as the catalyst in modified by treatment with a soluble aluminum, titanium or zirconium compound, and the spherical particles thereof have a diameter of 0.01 to 3 mm, a specific surface of 0.1 to 1200 m2 /g, a specific pore volume of 0.01 to 6.0 ml/g and a bulk density of 50 to 1000 g/l.