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9018408 Processes for producing terephthalic acid and terephthalic esters  
The present invention generally relates to a condensed process for producing terephthalic acid and terephthalic esters from a dialkyl cyclohexane-2,5-dione-1,4-dicarboxylate; a chemoselective...
8871966 Regiospecific synthesis of terephthalates  
A method for preparing 1,4-biscarboxylic acid esters of benzene is provided.
8772529 Catalyst for alkylation and process for producing alkylaromatic hydrocarbon compound using the catalyst  
A catalyst for alkylation contains an inorganic structural material having an ion-exchange ability and a metal ion having a valency of 2 or more. The metal ion is supported on the inorganic...
8367858 Terephthalic and trimellitic based acids and carboxylate derivatives thereof  
The present invention relates to novel substituted and unsubstituted terephthalic acid and carboxylate derivatives and products prepared therefrom having a significant renewable content. The...
8034970 Method of making phthalic acid diesters  
Methods and systems for the production of phthalic acid diesters are described herein. The methods and systems incorporate the novel use of a high shear device to promote dispersion and mixing of...
7696125 Catalyst and process for preparing carboxylic acid esters  
A catalyst and a process for preparing carboxylic acid esters from an aldehyde and an alcohol in the presence of molecular oxygen are disclosed. The catalyst comprises metals supported on a...
7425603 Polymers, polymer compositions, and method of preparation  
A polymer comprising structural units derived from a polycyclic dihydroxy compound of Formula (I) wherein R1, R2 and R3 are independently at each occurrence selected from the group consisting of a...
7381786 Methods of polymer preparation using polycyclic dihydroxy compounds  
Disclosed herein is a process for preparing a polymer comprising structural units derived from polycyclic dihydroxy compound having Formula (I), wherein R1 is selected from the group consisting of...
7361779 Low-melting mixtures of di-n-butyl and diisobutyl terephthalate  
Mixtures of terephthalate diesters having lowered freezing points and methods of making the terephthalic acid diesters. The method includes contacting a first alcohol, a second different alcohol...
7326763 Polymers, polymer compositions and method of preparation  
A polymer comprises structural units derived from a polycyclic dihydroxy compound of Formula (I) wherein R1 is selected from the group consisting of a cyano functionality, a nitro functionality,...
7307183 Process for producing tetrabromobenzoate esters  
A method for preparing tetrabromobenzoate ester from a tetrabromophthalic anhydride including the steps of reacting the tetrabromophthalic anhydride with a catalyst and an alcohol at a temperature...
7271281 Preparation of 2,3,3′,4′ -biphenyltetracarboxylic acid tetraester  
2,3,3′,4′-Biphenyltetracarboxylic acid tetraester is predominantly produced by a process in which a phthalic acid diester is subjected to oxidative-coupling reaction in the presence of molecular...
7247742 Recycling polyethylene naphthalate containing materials in a process to produce diesters  
A process for preparing a dialkylester of a naphthalenedicarboxylic acid comprising directing a liquid phase reaction mixture comprising a low molecular weight alcohol, a naphthalenedicarboxylic...
7208620 Polycyclic dihydroxy compounds and methods for preparation  
A dihydroxy aromatic compound having a Formula (I) wherein R1 is selected from the group consisting of a cyano functionality, a nitro functionality, an aliphatic functionality having 1 to 10...
7030264 Bis-β-hydroxyethyl terephthalate  
Bis-β-hydroxyethyl terephthalate having an optical density measured in a 10 wt % methanol solution at a measurement wavelength of 380 nm and a cell optical path length of 10 mm of 0.000 to 0.006....
6914154 Process for production of biphenyltetracarboxylic acid tetraesters  
A production process, especially a continuous production process, for a biphenyltetracarboxylic acid tetraester characterized by carrying out, in parallel, a step of preliminarily mixing a...
6867322 Ester-forming monomer  
An ester-forming monomer obtained by depolymerization of polytrimethylene terephthalate and having an acrolein content of no greater than 0.5 wt %. Polymers obtained using the monomer and fibers,...
6867323 Cross-coupling reaction of organosilicon nucleophiles  
Improved methods for generating a —C—C— bond by cross-coupling of a transferable group with an acceptor group. The transferable group is a substituent of an organosilicon nucleophile and the...
6855844 Phtalic anhydride based polyester-ether polyols and double metal cyanide catalyst system for preparing same  
Disclosed are polyester-ether polyols and their use in urethane prepolymers, urethane foams and non-foam urethane coatings, adhesives, sealants and/or elastomers. Methods for producing such...
6710202 Process for production of high-purity bis-β-hydroxyethyl terephthalate  
To provide a process for producing a high-purity bis-β-hydroxyethyl terephthalate from crude terephthalic acid. A process for producing high-purity bis-β-hydroxyethyl terephthalate by carrying out...
6664380 Perfluorosulfonylmethide compounds; use thereof for carbon-carbon bond formation  
Free perfluorosulfonylmethide compounds and metal salts thereof show strong catalytic activity in carbon-carbon bond formation reactions, in amounts as low as 0.1 mole %. Fluorous media may be...
6630601 Methods for the preparation or purification of bis-β-hydroxyethyl terephthalate  
An aromatic polyester is pre-decomposed by heating together with bis-β-hydroxyethyl terephthalate and/or a low condensate thereof and then, reacted with ethylene glycol to convert the terephthalic...
6569352 Phthalic anhydride based polyester-ether polyols and urethane prepolymers produced therefrom  
Disclosed are polyester-ether polyols and their use in urethane prepolymers, urethane foams and non-foam urethane coatings, adhesives, sealants and/or elastomers. Methods for producing such...
6566548 Molecular compounds containing novel carboxylic acid derivatives as the constituent compound  
Novel molecular compounds containing carboxylic acid derivatives represented by general formula (I) or (II) as the constituent compound and exhibiting excellent performances in various technical...
6472557 Process for recycling polyesters  
A process for producing high quality TPA suitable for PET feedstock material from recycled polyester. The process includes the steps of depolymerizing the polyester to form DMT; separating the DMT...
6462223 Ester and process for producing the same  
6-Alkoxycarbonylmethyl-4H-1,3-dioxin-4-one derivatives are produced by reacting a 6-halomethyl-4H-1,3-dioxin-4-one derivative with carbon monoxide and an alcohol or water, and...
6355702 Acyclic monomers which when cured are reworkable through thermal decomposition  
Compounds containing unsaturated aliphatic moieties which are linked to each other by a tertiary oxycarbonyl containing acyclic moiety are basis for compositions which are cured to polymer...
6316675 Process for the preparation of an olefin-substituted aromatic or heteroaromatic compound  
A process for the synthesis of olefins having aromatic substituents is described in which olefins are reacted with aryl halides in the presence of catalysts consisting of palladium compounds and...
6310233 Pressure ethoxylation in dense gases to produce hydroxyalkyl ester monomer  
A pressure process for preparing a hydroxyalkyl ester monomer and oligomer that can be used to prepare a polyester such as polyethylene terephthalate (PET) is disclosed. The process includes the...
6310236 Process for preparing α-hydroxycarboxylate  
There is herein disclosed a process for efficiently preparing, from an α-hydroxycarboxylic amide and an alcohol in an industrially advantageous manner, an α-hydroxycarboxylate which is useful as...
6191305 Preparation of tetraester of 3, 3', 4, 4', - biphenyltetracarboxylic acid  
A tetraester of 3,3',4,4'-biphenyltetracarboxylic acid is advantageously prepared by a process composed of a step of dimerizing an o-phthalic diester in the presence of a catalyst comprising a...
6103919 Catalytic system and method for coupling of aromatic compounds  
A catalytic process for production of biphenyl and its derivatives by coupling of substituted or unsubstituted monoaryl compounds in the presence of a catalytic system comprising at least one Pd...
6087527 Method for producing alkyl carboxylates by multi-stage esteridication interrupted with a dehydration step  
Method for producing an alkyl carboxylate, in which a carboxylic acid and an alcohol are esterified by reaction in the presence of an acid catalyst, by removing water in a dehydration step...
5962724 High enantio-selective process for producing pure enantiomeric cyclopentane and cyclopentene-(β)-amino acids  
The present invention relates to a highly enantioselective process for the preparation of enantiomerically pure cyclopentane- and -pentene β-amino acids of the general formula (I) ##STR1## in...
5952520 Recovery of ester monomer from polyester resins  
There is described a process for improving the yield of diester monomer recovered from the depolymerization of polyethylene terephthalate by converting a mixture of dimethyl terephthalate and...
5936116 Preparation of allyl succinate derivatives and starting materials therefor  
A process for the preparation of a compound of formula (I) wherein R2 is a (C1 -C6)alkyl, (C2 -C6)alkenyl, (C2 -C6)alkynyl, phenyl(C1 -C6)alkyl, heteroaryl(C1 -C6)alkyl, cycloalkyl(C1 -C6)alkyl or...
5874608 Process for the preparation of esters of aromatic carboxylic acid  
The present invention relates to a process for the preparation of compounds of the formula (1) R1 R2 R3 R4 R5 ArCOOR (1)in which R1, R2, R3, R4 and R5 are identical or different and are hydrogen,...
5710315 Monomer recovery process for contaminated polymers  
An improved process for recovering depolymerization products from polymers such as polyesters, polyamides, and polyesteramides, especially when the starting polymer content is less than about 98%....
5473098 Process for the preparation of stilbenedicarboxylate esters  
Disclosed is a process for the preparation of 4,4'-stilbenedicarboxylate esters by a 4-step process starting with an alkyl p-formylbenzoate and utilizing intermediate phosphite and phosphonate...
5470998 Process for the preparation of esters of stilbenedicarboxylic acid  
Disclosed is a process for the preparation of 4,4'-stilbenedicarboxylate esters by a 3-step process utilizing p-toluic acid, an alkyl p-formylbenzoate and a trialkyl phosphite. The steps comprise...
5461174 Method of reacting carboxylic chlorides dissolved in carboxylates  
The invention relates to a method of reacting alkyl carboxylate chlorides and/or carboxylic dichlorides dissolved in corresponding diaikyl carboxylates with the corresponding alkanol at...
5451687 Process for producing O,O'-diacyltartaric anhydride and process for producing O,O'-diacyltartaric acid  
An industrial process for producing O,O'-diacyltartaric anhydride with high purity and high efficiency is disclosed. According to the process of the invention, a carboxylic acid of the formula...
5414107 Process for recycling polyethylene terephthalate process residues containing alkali metal organic salts  
A process for recycling by-products produced from a process for the manufacture of polyethylene terephthalate is disclosed. The process includes the steps of: (a) providing ethylene glycol...
5322954 Synthesis of 4-substituted phthalic anhydrides  
Disclosed is a method of making a 4-substituted phthalic anhydride. A halomaleic (including halofumaric anhydride (or the acid or ester thereof) is made by the reaction of-maleic anhydride with...
5319128 Production of terephthalate esters by degradative transesterification of scrap or virgin terephthalate polyesters  
A process for the production of terephthalate diesters having the following formula (I). ##STR1## Substituents R and R' are the same or different and represent a straight chain, branched or cyclic...
5243067 Process of production of 3,4,3',4'-substituted biphenyl compound  
A 3,4,3',4'-substituted biphenyl compound represented by the general formula (II): ##STR1## wherein, one of R1 and R2 is a -CH3 group and the one other is a --COOR5 group, --COOH group, or --COCl...
5204454 Prepolymeric polyols containing mesogenic units  
Prepolymer polyols containing mesogenic moieties useful as reactants for the preparation of resinous materials are disclosed. Synthesized by condensing a polyether polyol with bifunctional...
5194669 Preparation of alkyl (alkoxycarbonylcyclohexyl) cyclohexenecarboxylates and dialkyl biphenyldicarboxylates  
Disclosed are processes for the preparation of alkyl (alkoxycarbonylcyclohexyl)cyclohexenecarboxylates by the dimerization of alkyl 3-cyclohexenecarboxylates and the dehydrogenation of the alkyl...
5175339 Process for preparing solid particulate dialkylesters from their corresponding dianhydrides  
A process for producing a dialkyl ester (i.e. BTDE) from its corresponding dianhydride (i.e., BTDA) comprising mixing the dianhydride, an organic solvent, solid catalyst and an alcohol capable of...
5117041 Sulfonation process  
Allyl end-capped propylene terephthalate polyester oligomers are sulfonated in an aqueous system in the presence of a free radical initiator by a process in which only a part (about 15% to 40%) of...

Matches 1 - 50 out of 167 1 2 3 4 >