POLYCARBONATE COMPOSITIONS HAVING ENHANCED OPTICAL PROPERTIES, METHODS OF MAKING AND ARTICLES COMPRISING THE POLYCARBONATE COMPOSITIONS

In some embodiments, a composition comprises a bisphenol-A polycarbonate, wherein a molded article of the composition has transmission level greater than or equal to 90.0% at 2.5 mm thickness as measured by ASTM D1003-00 and a yellow index (YI) less than or equal to 1.5 as measured by ASTM D1925.

Method for Making Carbamates, Ureas and Isocyanates

The present invention provides methods of forming carbamates, ureas, and isocyanates. In certain embodiments these methods include the step of reacting an amine with an ester-substituted diaryl carbonate to form an activated carbamate which can be further derivitized to form non-activated carbamate or a urea. The urea or carbamate can be subjected to a pyrolysis reaction to form isocyanate.

POLYCARBONATE MADE FROM LOW SULFUR BISPHENOL A AND CONTAINING CONVERIONS MATERIAL CHEMISTRY, AND ARTICLES MADE THEREFROM

In one embodiment, a process for producing a bisphenol A product comprises: reacting phenol with acetone in the presence of a sulfur containing promoter to obtain a reaction mixture comprising bisphenol A, phenol, and the promoter; after reacting the phenol with the acetone, cooling to form a crystal stream comprising crystals of bisphenol A and phenol; separating the crystals from the crystal steam; melting the crystals to form a molten stream of bisphenol A, phenol, and sulfur; contacting the molten stream with a base to reduce a sulfur concentration in the molten stream and form a reduced sulfur stream; and removing phenol from the reduced sulfur stream to form a bisphenol A product.

POLYCARBONATE COMPOSITIONS HAVING ENHANCED OPTICAL PROPERTIES, METHODS OF MAKING AND ARTICLES COMPRISING THE POLYCARBONATE COMPOSITIONS

In some embodiments, a method of making a polycarbonate composition comprises: polymerizing by an interfacial polymerization, reactants comprising a starting material comprising a bisphenol-A to form a bisphenol-A polycarbonate, wherein the bisphenol-A has a purity of greater than or equal to 99.65 wt % and a sulfur content of less than or equal to 2 ppm. The polycarbonate composition has a free hydroxyl content of less than or equal to 150 ppm, and wherein a molded article of the polycarbonate composition has transmission level greater than or equal to 90.0% at 2.5 mm thickness as measured by ASTM D1003-00 and a yellow index (YI) less than or equal to 1.5 as measured by ASTM D1925. 1. A method of making a polycarbonate composition comprising:polymerizing by an interfacial polymerization, reactants comprising a starting material comprising a bisphenol-A to form a bisphenol-A polycarbonate, wherein the bisphenol-A has a purity of greater than or equal to 99.65 wt % and a sulfur content of less than or equal to 2 ppm;wherein the polycarbonate composition has a free hydroxyl content of less than or equal to 150 ppm, and wherein a molded article of the polycarbonate composition has transmission level greater than or equal to 90.0% at 2.5 mm thickness as measured by ASTM D1003-00 and a yellow index (YI) less than or equal to 1.5 as measured by ASTM D1925.2. The method as in claim 1 , comprising dissolving a reactant in an aqueous caustic material claim 1 , adding the resultant mixture to a solvent medium claim 1 , and contacting the reactants with a carbonate precursor in presence of a catalyst.3. The method as in claim 1 , further comprising adding an end-capping agent.4. The method as in claim 3 , wherein the end-capping agent comprises at least one of the following: phenol or a phenol containing one or more substitutions with at least one of the following: aliphatic groups claim 3 , olefinic groups claim 3 , aromatic groups claim 3 , halogens claim 3 , ester groups ...

Polycarbonate compositions containing conversion material chemistry and having enhanced optical properties, methods of making and articles comprising the same

In some embodiments, a composition comprises a bisphenol-A polycarbonate, wherein a molded article of the bisphenol-A polycarbonate has transmission level greater than or equal to 90.0% at 2.5 mm thickness as measured by ASTM D1003-00 and a yellow index (YI) less than or equal to 1.5 as measured by ASTM D1925. In some embodiments, light emitting device comprises: a lighting element located in a housing. The housing is formed from a plastic composition comprising: the polycarbonate composition and a conversion material. After the conversion material has been exposed to an excitation source, the conversion material has a luminescence lifetime of less than 10−4 seconds when the excitation source is removed.

Plastic composition comprising a polycarbonate made from low sulfur bisphenol A, and articles made therefrom

In one embodiment, a light emitting device includes a lighting element located in a housing, wherein the housing is formed from a plastic composition including, for example, a polycarbonate formed from reacting, in the presence of a transesterification catalyst, a diaryl carbonate ester and a bisphenol A, wherein the bisphenol A has a sulfur concentration of 1 ppm to 15 ppm, based upon a weight of the bisphenol A; and a conversion material wherein the conversion material includes an inorganic material that converts radiation of a certain wavelength and re-emits of a different wavelength; wherein after the conversion material has been exposed to an excitation source, the conversion material has a luminescence lifetime of less than 10 −4 seconds when the excitation source is removed.

PROCESS FOR PRODUCING BISPHENOL A WITH REDUCED SULFUR CONTENT, POLYCARBONATE MADE FROM THE BISPHENOL A, AND CONTAINERS FORMED FROM THE POLYCARBONATE

In one embodiment, a process for producing a bisphenol A product comprises: reacting phenol with acetone in the presence of a sulfur containing promoter to obtain a reaction mixture comprising bisphenol A, phenol, and the promoter; after reacting the phenol with the acetone, cooling to form a crystal stream comprising crystals of bisphenol A and phenol; separating the crystals from the crystal steam; melting the crystals to form a molten stream of bisphenol A, phenol, and sulfur; contacting the molten stream with a base to reduce a sulfur concentration in the molten stream and form a reduced sulfur stream; and removing phenol from the reduced sulfur stream to form a bisphenol A product. Also disclosed herein is a container comprising: a polycarbonate formed from a bisphenol A having a sulfur concentration of 0.5 to 15 ppm based upon the weight of the bisphenol A. 1. A process for producing a bisphenol A product comprising:reacting phenol with acetone in the presence of a sulfur containing promoter to obtain a reaction mixture comprising bisphenol A, phenol, and the promoter;after reacting the phenol with the acetone, cooling the reaction mixture to form a crystal stream comprising crystals of bisphenol A and phenol;separating the crystals from the crystal steam;melting the crystals to form a molten stream of bisphenol A, phenol, and sulfur;contacting the molten stream with a base to reduce a sulfur concentration in the molten stream and form a reduced sulfur stream; andremoving phenol from the reduced sulfur stream to form a bisphenol A product.2. The process according to claim 1 , wherein the molten stream is contacted with the base at a temperature of 70° C. to 120° C.3. The process according to claim 2 , wherein the temperature is 80° C. to 100° C.4. The process according to claim 1 , wherein the promoter comprises a catalyst selected from 3-mercaptopropionic acid claim 1 , methyl mercaptan claim 1 , ethyl mercaptan claim 1 , 2 claim 1 ,2-bis(methylthio)propane ...

POLYCARBONATE COMPOSITIONS CONTAINING CONVERIONS MATERIAL CHEMISTRY AND HAVING ENHANCED OPTICAL PROPERTIES, METHODS OF MAKING AND ARTICLES COMPRISING THE SAME

In some embodiments, a composition comprises a bisphenol-A polycarbonate, wherein a molded article of the bisphenol-A polycarbonate has transmission level greater than or equal to 90.0% at 2.5 mm thickness as measured by ASTM D1003-00 and a yellow index (YI) less than or equal to 1.5 as measured by ASTM D1925. In some embodiments, light emitting device comprises: a lighting element located in a housing. The housing is formed from a plastic composition comprising: the polycarbonate composition and a conversion material. After the conversion material has been exposed to an excitation source, the conversion material has a luminescence lifetime of less than 10seconds when the excitation source is removed. 1. A polycarbonate composition comprising: bisphenol-A polycarbonate , wherein a molded article of the bisphenol-A polycarbonate has transmission level greater than or equal to 90.0% at 2.5 mm thickness as measured by ASTM D1003-00 and a yellow index (YI) less than or equal to 1.5 as measured by ASTM D1925.2. The composition as in claim 1 , wherein the bisphenol-A polycarbonate comprises less than or equal to 150 ppm free hydroxyl groups.3. The composition as in claim 1 , wherein the bisphenol-A polycarbonate comprises sulfur in an amount less than or equal to 2 ppm sulfur.4. The composition as in claim 1 , wherein the molded article comprises an increase in yellow index (YI) of less than 2 during 2 claim 1 ,000 hours of heat aging at 130° C.5. The composition as in claim 1 , wherein the bisphenol-A polycarbonate is an interfacially polymerized polycarbonate.6. The composition as in claim 1 , wherein the composition comprises a flame retardant.7. The composition as in claim 1 , further comprising a second polycarbonate derived from bisphenol-A claim 1 , wherein the second polycarbonate is different than the bisphenol-A polycarbonate.8. The composition as in claim 7 , further comprising a second polycarbonate claim 7 , wherein the second polycarbonate is selected from ...

Method for Making Carbonates and Esters

A method for forming a monomeric carbonate includes the step of combining a monofunctional alcohol or a difunctional diol with an ester-substituted diaryl carbonate to form a reaction mixture. Similarly, a method for forming a monomeric ester includes the step of combining a monofunctional carboxylic acid or ester with an ester-substituted diaryl carbonate to form a reaction mixture. These methods further include the step of allowing the reaction mixtures to react to form a monomeric carbonate or a monomeric ester, respectively.

Method for producing phenolic compound

A method is provided for producing an ester-substituted phenol product stream from an ester-substituted diaryl carbonate manufacturing waste stream. The method includes the steps of obtaining a waste stream containing an ester-substituted diaryl carbonate from an ester-substituted diaryl carbonate manufacturing facility and creating a reaction mixture by combining the waste stream with a solvent and with a transesterification catalyst. The reaction mixture is maintained at a reaction pressure at or below atmospheric pressure, and at a reaction temperature for a period of time sufficient to produce ester-substituted phenol by solvolysis of the ester-substituted diaryl carbonate. Ester-substituted phenol is removed from the reaction mixtures in an ester-substituted phenol stream. The solvent, the reaction temperature, and the reaction time are selected in combination such that less than 1,000 ppm of acid-substituted phenol is present in the ester-substituted phenol stream.

Method for making carbonates and esters

A method for forming a monomeric carbonate includes the step of combining a monofunctional alcohol or a difunctional diol with an ester-substituted diaryl carbonate to form a reaction mixture. Similarly, a method for forming a monomeric ester includes the step of combining a monofunctional carboxylic acid or ester with an ester-substituted diaryl carbonate to form a reaction mixture. These methods further include the step of allowing the reaction mixtures to react to form a monomeric carbonate or a monomeric ester, respectively.

POLYCARBONATE MADE FROM LOW SULFUR BISPHENOL A AND CONTAINING CONVERSIONS MATERIAL CHEMISTRY, AND ARTICLES MADE THEREFROM

In one embodiment, a light emitting device, comprises: a lighting element located in a housing, wherein the housing is formed from a plastic composition comprising: a polycarbonate formed from reacting, in the presence of a transesterification catalyst, a diaryl carbonate ester and a bisphenol A, wherein the bisphenol A has a sulfur concentration of 1 ppm to 15 ppm, based upon a weight of the bisphenol A; and a conversion material wherein the conversion material comprises an inorganic material that converts radiation of a certain wavelength and re-emits of a different wavelength; wherein after the conversion material has been exposed to an excitation source, the conversion material has a luminescence lifetime of less than 10seconds when the excitation source is removed. 1. A light emitting device , comprising:a lighting element located in a housing, wherein the housing is formed from a plastic composition comprising:a polycarbonate formed from reacting, in the presence of a transesterification catalyst, a diaryl carbonate ester and a bisphenol A, wherein the bisphenol A has a sulfur concentration of 1 ppm to 15 ppm, based upon a weight of the bisphenol A; anda conversion material wherein the conversion material comprises an inorganic material that converts radiation of a certain wavelength and re-emits of a different wavelength;{'sup': '−4', 'wherein after the conversion material has been exposed to an excitation source, the conversion material has a luminescence lifetime of less than 10seconds when the excitation source is removed.'}2. The device of claim 1 , wherein the lighting element is a radiation source claim 1 , and wherein the housing is an emitting portion that is in optical communication with the radiation source.3. The device of claim 2 ,wherein the radiation source is configured to emit radiation having a first wavelength range;wherein the conversion material is configured to absorb at least a portion of the first wavelength range radiation and emit ...

Polycarbonate compositions having enhanced optical properties, methods of making and articles comprising the polycarbonate compositions

In some embodiments, a composition comprises a bisphenol-A polycarbonate, wherein a molded article of the composition has transmission level greater than or equal to 90.0% at 2.5 mm thickness as measured by ASTM D1003-00 and a yellow index (YI) less than or equal to 1.5 as measured by ASTM D1925.

Process for producing bisphenol A with reduced sulfur content, polycarbonate made from the bisphenol A, and containers formed from the polycarbonate

In one embodiment, a process for producing a bisphenol A product comprises: reacting phenol with acetone in the presence of a sulfur containing promoter to obtain a reaction mixture comprising bisphenol A, phenol, and the promoter; after reacting the phenol with the acetone, cooling to form a crystal stream comprising crystals of bisphenol A and phenol; separating the crystals from the crystal steam; melting the crystals to form a molten stream of bisphenol A, phenol, and sulfur; contacting the molten stream with a base to reduce a sulfur concentration in the molten stream and form a reduced sulfur stream; and removing phenol from the reduced sulfur stream to form a bisphenol A product. Also disclosed herein is a container comprising: a polycarbonate formed from a bisphenol A having a sulfur concentration of 0.5 to 15 ppm based upon the weight of the bisphenol A.

Process for producing bisphenol-A

A process for preparing 2,2-bis(4-hydroxyphenyl)propane (p,p-bisphenol-A) from 2,4,4-trimethyl-2-(4-hydroxyphenyl)chroman (chroman 1.5) is disclosed. Phenol and chroman 1.5 are contacted over an acidic ion exchange resin at a given temperature for a given period of time. The process results in improved quality of p,p-bisphenol-A, better performance of catalyst, improved raw material usage, and reduced waste.

PROCESS FOR PRODUCING BISPHENOL-A

A process for preparing 2,2-bis(4-hydroxyphenyl)propane (p,p-bisphenol-A) from 2,4,4-trimethyl-2-(4-hydroxyphenyl)chroman (chroman 1.5) is disclosed. Phenol and chroman 1.5 are contacted over an acidic ion exchange resin at a given temperature for a given period of time. The process results in improved quality of p,p-bisphenol-A, better performance of catalyst, improved raw material usage, and reduced waste.

METHOD FOR MAKING CARBAMATES, UREAS AND ISOCYANATES

The present invention provides methods of forming carbamates, ureas, and isocyanates. In certain embodiments these methods include the step of reacting an amine with an ester-substituted diaryl carbonate to form an activated carbamate which can be further derivatized to form non-activated carbamate or a urea. The urea or carbamate can be subjected to a pyrolysis reaction to form isocyanate. 2. The composition of claim 1 , where the ester-substituted diaryl carbonate is bismethylsalicylcarbonate (BMSC) and the ester-substituted phenol byproduct is methyl salicylate.3. The composition of claim 1 , wherein Xis NRR claim 1 , whereby the compound is a urea.4. The composition of claim 3 , wherein Ror Rin combination with Ror Rforms a five or six-member ring.5. The composition of claim 1 , wherein Xis OR claim 1 , whereby the compound is a carbamate.6. The composition of claim 5 , wherein Ror Rin combination with Rforms a five or six-member ring.8. The carbamate of claim 7 , wherein Ris methyl. The present application is a divisional application of U.S. patent application Ser. No. 12/347,131, filed Dec. 31, 2008, which is a non-provisional application of U.S. Provisional Patent Application Ser. No. 61/110,863 filed on Nov. 3, 2008, which are both incorporated herein by reference for all purposes.This application relates to the preparation of carbamates, ureas, and isocyanates using an activated ester carbonates (e.g. an ester-substituted diaryl carbonate) such as bismethylsalicylcarbonate (BMSC) as a reactant.Monomeric carbamates, ureas, and isocyanates find substantial utility in a wide variety of applications including fine and specialty chemicals, pharmaceuticals, cosmetics, and agriculture and crop protection. Carbamates and ureas share a common structural element in which a carbonyl group is flanked by an oxygen and a nitrogen (carbamates) or two nitrogens (ureas). Isocyanates can be made by pyrolysis of a carbamate or a urea.Commonly, carbamates and ureas are ...

Polycarbonate compositions having enhanced optical properties, methods of making and articles comprising the polycarbonate compositions

In some embodiments, a method of making a polycarbonate composition comprises: polymerizing by an interfacial polymerization, reactants comprising a starting material comprising a bisphenol-A to form a bisphenol-A polycarbonate, wherein the bisphenol-A has a purity of greater than or equal to 99.65 wt % and a sulfur content of less than or equal to 2 ppm. The polycarbonate composition has a free hydroxyl content of less than or equal to 150 ppm, and wherein a molded article of the polycarbonate composition has transmission level greater than or equal to 90.0% at 2.5 mm thickness as measured by ASTM D1003-00 and a yellow index (YI) less than or equal to 1.5 as measured by ASTM D1925.

Polycarbonate compositions containing conversion material chemistry and having enhanced optical properties, methods of making and articles comprising the same

In some embodiments, a composition includes: a conversion material and a bisphenol-A polycarbonate; wherein a molded article of the bisphenol-A polycarbonate has a transmission level of greater than or equal to 90.0% at a thickness of 2.5 mm as measured by ASTM D1003-00; and wherein the molded article comprises an increase in the yellow index of less than 2 during 2,000 hours of heat aging at 130° C.; and wherein the conversion material comprises a yellow conversion material, a green conversion material, a red conversion material, or a combination comprising at least one of the foregoing.

POLYCARBONATE COMPOSITIONS CONTAINING CONVERSION MATERIAL CHEMISTRY AND HAVING ENHANCED OPTICAL PROPERTIES, METHODS OF MAKING AND ARTICLES COMPRISING THE SAME

In some embodiments, a composition includes: a conversion material and a bisphenol-A polycarbonate; wherein a molded article of the bisphenol-A polycarbonate has a transmission level of greater than or equal to 90.0% at a thickness of 2.5 mm as measured by ASTM D1003-00; and wherein the molded article comprises an increase in the yellow index of less than 2 during 2,000 hours of heat aging at 130° C.; and wherein the conversion material comprises a yellow conversion material, a green conversion material, a red conversion material, or a combination comprising at least one of the foregoing. 2. The composition of claim 1 , wherein the conversion material absorbs an absorbed portion of a first radiation with a first wavelength of 300 nm to 500 nm and emits a second radiation at a different wavelength than the first wavelength.3. The composition of claim 1 , wherein the different wavelength is 450 nm to 700 nm.4. The composition of claim 1 , wherein the conversion material comprises a green aluminate.5. The composition of claim 1 , wherein the conversion material comprises a red conversion material.6. The composition of claim 5 , wherein the red conversion material comprises (Sr claim 5 ,Ca)AlSiN:Eu).7. The composition of claim 1 , wherein the conversion material comprises a yellow conversion material.8. The composition of claim 1 , wherein the conversion material comprises yttrium aluminum garnet doped with cerium.9. The composition of claim 1 , wherein the conversion material comprises a nitride conversion material that is optionally doped with cerium and/or europium claim 1 , a nitrido silicate claim 1 , a nitride orthosilicate claim 1 , an oxonitridoaluminosilicate claim 1 , or a combination comprising at least one of the foregoing.10. The composition of claim 1 , wherein the conversion material is doped with europium.11. The composition of claim 1 , wherein the conversion material has a median particle size of 1 to 20 micrometers.12. The composition of claim 1 , ...

Method for making carbamates, ureas and isocyanates

The present invention provides methods of forming carbamates, ureas, and isocyanates. In certain embodiments these methods include the step of reacting an amine with an ester-substituted diaryl carbonate to form an activated carbamate which can be further derivitized to form non-activated carbamate or a urea. The urea or carbamate can be subjected to a pyrolysis reaction to form isocyanate.

Methods for making melt polymerization polycondensation products

Disclosed herein are methods for making a melt polymerization polycondensation product using real-time, on-line measurement of reactivity of polycondensation reactants. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present invention.

Method for the off-line determination of intrinsic reactivity of reactants in polycondensation reactions

本案揭示使用近紅外線光譜術及高通量篩選法測量縮聚反應物之固有反應活性的方法及系統。本摘要意在做為供特定技藝中搜尋目的之掃描工具而非限制本發明。

Method for making carbamates, ureas and isocyanates

The present invention provides methods of forming carbamates, ureas, and isocyanates. In certain embodiments these methods include the step of reacting an amine with an ester-substituted diaryl carbonate to form an activated carbamate which can be further derivitized to form non-activated carbamate or a urea. The urea or carbamate can be subjected to a pyrolysis reaction to form isocyanate.

process for producing a bisphenol a product, process for preparing polycarbonate, and container

resumo processo para produzir um produto bisfenol a, processo para preparar policarbonato, e, contêiner em uma modalidade, um processo para produzir um produto bisfenol a compreende: reagir fenol com acetona na presença de um promotor contendo enxofre para obter uma mistura de reação compreendendo o bisfenol a, o fenol, e o promotor; após reagir o fenol com a acetona, resfriar para formar um fluxo de cristal compreendendo cristais de bisfenol a e fenol; separar os cristais do fluxo de cristal; fundir os cristais para formar um fluxo fundido de bisfenol a, fenol, e enxofre; fazer o fluxo fundido entrar em contato com uma base para reduzir a concentração de enxofre no fluxo fundido e formar um fluxo de enxofre reduzido; e remover o fenol do fluxo de enxofre reduzido para formar um produto bisfenol a. também relatado no presente documento é um contêiner compreendendo: um policarbonato formado a partir de um bisfenol a tendo uma concentração de enxofre de 0,5 a 15 ppm com base no peso do bisfenol a. 3 1/1 A process for producing a bisphenol a product, a process for preparing polycarbonate, and a container in one embodiment, a process for producing a bisphenol a product comprises: reacting phenol with acetone in the presence of a sulfur containing promoter to obtain a reaction mixture comprising the bisphenol a, phenol, and promoter; upon reacting phenol with acetone, cooling to form a crystal flow comprising bisphenol a and phenol crystals; separate crystals from crystal flow; melting the crystals to form a molten flux of bisphenol a, phenol, and sulfur; contacting the molten stream with a base to reduce sulfur concentration in the molten stream and forming a reduced sulfur stream; and removing phenol from the reduced sulfur stream to form a bisphenol product a. Also reported herein is a container comprising: a polycarbonate formed from a bisphenol a having a sulfur concentration of 0.5 to 15 ppm based on the weight of bisphenol a. 3 1/1

Method for the off-line determination of intrinsic reactivity of reactants in polycondensation reactions

Disclosed herein are methods and systems for determining intrinsic reactivity of polycondensation reactants using near infrared spectroscopy and high throughput screening. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present invention.

Process for producing bisphenol a with reduced sulfur content, polycarbonate made from the bisphenol a, and containers formed from the polycarbonate

In one embodiment, a process for producing a bisphenol A product comprises: reacting phenol with acetone in the presence of a sulfur containing promoter to obtain a reaction mixture comprising bisphenol A, phenol, and the promoter; after reacting the phenol with the acetone, cooling to form a crystal stream comprising crystals of bisphenol A and phenol; separating the crystals from the crystal steam; melting the crystals to form a molten stream of bisphenol A, phenol, and sulfur; contacting the molten stream with a base to reduce a sulfur concentration in the molten stream and form a reduced sulfur stream; and removing phenol from the reduced sulfur stream to form a bisphenol A product. Also disclosed herein is a container comprising: a polycarbonate formed from a bisphenol A having a sulfur concentration of 0.5 to 15 ppm based upon the weight of the bisphenol A.

Process for producing bisphenol a with reduced sulfur content

Systems and process for the production of hydrocarbon products from crude oil

Systems and processes to produce hydrocarbon products are described. A system can include a heavy hydrocarbon processing unit, a steam cracking, and a gaseous hydrocarbon separation unit coupled to the crude oil processing unit and the steam cracking unit. The gaseous hydrocarbon separation unit can separate naphtha, C4 hydrocarbons, and C2-C3 hydrocarbons from a gaseous hydrocarbon composition having a boiling temperature of less the 200 °C produced by the heavy hydrocarbon processing unit. The naphtha and C4 hydrocarbons can be stored. The C2-C3 hydrocarbons can be processed in the steam cracking unit to produce petroleum hydrocarbon products. The steam cracking unit can be indirectly coupled to an alkylation unit, a methyl t-butyl ether production unit, and/or a butene hydrogenation unit.

Systems and process for the production of hydrocarbon products

Processes for the production of petroleum products from crude oil are disclosed. A process can include subjecting a vacuum resid stream, in a resid processing unit, to conditions suitable to produce pitch and hydrocarbons having a boiling temperature less than 450 °C. Subjecting the pitch to conditions, in a pitch processing unit, to produce gaseous hydrocarbons, naphtha, distillate, and coke is also disclosed. The gaseous hydrocarbons, naphtha, distillate, and/or coke can be converted to other products such as ethylene, propylene, MTBE, and/or alkylates.

Systems and processes for the production of mtbe and maleic anhydride from c4 hydrocarbons therefrom

A system and method for production of MTBE, maleic anhydride, n-butane and/or olefins, is disclosed. The system includes a feed preparation unit, a deisobutanizer, an isobutane dehydrogenation unit, a steam cracker and a hydrogenation unit, as well as either or both of an MTBE synthesis unit or a maleic anhydride unit.

Systems and processes for the production of olefinic products

Systems and processes for producing hydrocarbon products from a hydrocarbon feedstock are described. A system can a steam cracking unit capable of receiving ethane from an ethane source, ethane/propane from an ethane/propane source, propane/butane from a propane/butane dehydrogenation unit, or a combination thereof. Processes to produce hydrocarbon products are also described

Methods and systems for producing light olefins and aromatics from gas condensates

Embodiments of the present disclosure describe methods and systems of producing light olefins and aromatics from a gas condensate feedstock using minimal pretreatment of the gas condensate feedstock. The gas condensate feedstock is separated into several streams including a heavy cut stream to produce aromatics and a light cut stream to produce lighter olefins. Other streams can be produces to maximize production of aromatics and lighter olefins depending on the method used.

Polycarbonate compositions containing conversions material chemistry and having enhanced optical properties, methods of making and articles comprising the same

In some embodiments, a composition comprises a bisphenol-A polycarbonate, wherein a molded article of the bisphenol-A polycarbonate has transmission level greater than or equal to 90.0% at 2.5 mm thickness as measured by ASTM D1003-00 and a yellow index (YI) less than or equal to 1.5 as measured by ASTM D1925. In some embodiments, light emitting device comprises: a lighting element located in a housing. The housing is formed from a plastic composition comprising: the polycarbonate composition and a conversion material. After the conversion material has been exposed to an excitation source, the conversion material has a luminescence lifetime of less than 10-4 seconds when the excitation source is removed