Showing papers by "Cabot Corporation published in 2011"

Snapshots of complete nitrogen atom transfer from an iron(IV) nitrido complex.

Abstract: The oxidation of organic hydrocarbons by oxygen atom transfer from metal oxo complexes has been well studied, and numerous methods of epoxidation by oxo transfer are routinely utilized in organic synthesis. 2] In contrast to oxygen atom transfer, methods for transferring nitrogen atoms to organic substrates are not as well-developed. Such methods would be of great utility owing to the value of the anticipated end products (e.g. aziridines) and the potential for using N2 as the nitrogen atom source. [4]

Modified fillers and elastomeric composites comprising same

Abstract: Modified fillers are described which have adsorbed and/or attached chemical groups, such as a triazole and/or pyrazole thereon. Other modified fillers are also described. Elastomeric compositions containing the modified filler are further described, as well as methods to improve hysteresis and/or abrasion resistance in elastomeric compositions using the modified fillers of the present invention.

Surface modified organic black pigments, surface modified carbon blacks, pigment mixtures using them, and low dielectric black dispersions, coatings, films, black matrices, and devices containing same

Abstract: The present invention relates to surface modified organic black pigments, surface modified carbon blacks, pigment mixtures and dispersions formed with these pigments, curable compositions, black matrices, and products incorporating them. The surface modified organic black pigment can have attached at least one organic group having the formula -X-Z, wherein X, which is directly attached to the pigment, represents an arylene group, a heteroarylene group, an alkylene group, an aralkylene group, or an alkarylene group, and Z represents at least one ionic group, at least one ionizable group, at least one nonionic group, at least one polymeric group, or any combinations thereof. Also disclosed are carbon black pigment combinations with the surface modified organic black pigments, low dielectric black dispersions, films, and black matrices containing them. Further disclosed are color filter on arrays having these black matrices, and liquid crystal devices including these color filter on arrays. Methods of preparing and making these various materials also are provided.

A case study—combining incident investigation approaches to identify system-related root causes

Abstract: This case study demonstrates an effective incident investigation approach to identify system-related root causes. The premise is simple: “What people do makes sense to them at the time.” The approach combines human error concepts and human factors analyses. The combined approach helps define and eliminate “hindsight bias” (the investigator's bias that exists because of the known bad consequence). The case study's human error mistake was simple and straightforward; however, it failed to capture the role that previous decisions played in the incident. The team's original recommendation was to “be more careful next time.” However, a deeper process safety management system-related issue was uncovered by continuing the probe using the human error “root cause” as the starting point of the investigation. This is the point where the real systemic issues are found. This case study showed how poor communications between the different people involved with engineering design, contractor fabrication, equipment inspection, and subsequent site installation caused the incident. The final recommendation of the team was to link the separate management of change (MOC), prestartup safety review (PSSR), and mechanical integrity quality assurance-related efforts together, ensuring an inspection step for “replacement-in-kind.” In conclusion, the combined approach helps the team better understand the timing and conditions of the event, better understand why people make the decisions they make at the time the event unfolds, and ensures that systemic root causes are discovered so that more appropriate, system-related preventive measures are chosen and implemented. © 2011 American Institute of Chemical Engineers Process Saf Prog, 2011

Elastomer composite with silica-containing filler and methods to produce same

Abstract: An elastomer composite with silica-containing filler is described, along with methods to make the same. The advantages achieved with the elastomer composite and methods are further described.

Aerogel by Cabot Corporation: Versatile Properties for Many Applications

Abstract: Cabot Corporation manufactures a hydrophobic aerogel in granular form sold worldwide. This contribution outlines the history of the company, the basic Cabot process, and several but not exhaustive applications in the field of architectural daylighting, building insulation, oil and gas pipelines, LNG and cryogenic applications, outdoor gear and apparel, coatings and specialty chemicals, and personal care. Four different products are described and their properties are discussed.

Improving operational discipline to prevent loss of containment incidents

Abstract: Process safety and risk management systems are implemented to reduce injuries and process incidents. The effectiveness of these systems is dependent on the company's implementation and support for operational discipline (OD)-related programs to ensure that the process safety management system requirements are followed day-to-day at all levels of the organization. However, OD-program-related problems continue to contribute to process incidents, including loss of containment (LOC) incidents, especially since they may not be formally addressed during incident investigations. This article provides a brief historical overview of major LOC incidents, describes how poor OD increases process safety risk and can contribute to LOC incidents, and provides an incident investigation tool to help monitor and improve OD characteristics. © 2011 American Institute of Chemical Engineers Process Saf Prog, 2011

Method For Carbon Black Production Using Preheated Feedstock And Apparatus For Same

Abstract: Methods for production of carbon black using high temperature feedstock at temperatures exceeding about 300° C. with fouling control are provided. An apparatus for production of carbon black according to these methods also is provided.

Coating comprising multipopulation fumed silica particles

Abstract: The invention provides a coating comprising fumed silica particles, wherein the fumed silica particles comprise aggregates of primary particles, wherein (a) the primary particles have a bimodal or multimodal particle size distribution representing populations of particles having at least a smallest average primary particle size and a largest average primary particle size, and wherein primary particles having a smaller average primary particle size are attached to primary particles having a larger average primary particle size, or (b) the aggregates have a bi-modal or multi-modal aggregate size distribution, and a carrier. The invention additionally provides a method for preparing a coated article comprising the coating.

Polymeric pigment systems and methods

Abstract: A composition useful as an inkjet ink is described as well as methods of making the composition. The composition includes a pigment and a polymer and the polymer may include a polyurethane. The composition exhibits properties that make it useful in thermal and piezo inkjet applications.

Method And Apparatus For Reducing NOx Emissions In The Incineration Of Tail Gas

Abstract: Methods for control of NOx emission in the incineration of tail gas are provided wherein tail gas that comprises NOx, NOx precursors, or both is introduced into a combustor and diluent is introduced into the combustor for controlling the combustor temperature to a temperature of from about 950"C to about 1 100°C. Methods also are provided for reducing NOx emissions by controlling air-to-fuel ratio in a tail gas combustor while controlling the combustor flame temperature through diluent injections. A boiler unit for carrying out these methods also is provided. A system for carbon black production using the boiler unit also is provided.

Integrate plant reliability efforts with mechanical integrity

Abstract: Maintenance ensures the reliability of the equipment to meet operation's demands. Operations ensure the production of sufficient and high quality product. Engineering designs and installs equipment that minimizes risk. Safety ensures that the engineering and administrative controls are in place to minimize that risk. This article presents a concept that combines these reliability and safety efforts, such that the maintenance, operations, engineering and safety groups speak the same language to minimize the overall business risk. This proposed approach combines existing plant reliability efforts with several Process Safety Management elements. The basic steps include identifying safety-critical equipment, ensuring accurate and up-to-date Process Safety Information (PSI), establishing the mechanical integrity (MI) Program, establishing Planned Maintenance (PM) programs, and creating equipment-specific maintenance procedures. The resultant mechanical integrity quality assurance (MI QA) program combines equipment reliability and operational integrity efforts to ensure that the equipment is properly designed (via PSI), fabricated as designed (via PSI and MI), and installed as designed (via Pre-Start-up Safety Reviews). The MI QA program also ensures that the equipment is operated and maintained as designed by trained personnel. Some benefits include being able to: (1) share and document best MI and PM practices between different sites; (2) focus limited PM-related resources on the process safety-critical equipment; and (3) help monitor the essential reliability efforts to ensure continued safe operation. © 2011 American Institute of Chemical Engineers Process Saf Prog, 2011

Methods to control electrical resistivity in filler-polymer compositions and products related thereto

Abstract: Methods to control electrical resistivity in filler-polymer compositions are described using dual phase fillers. Polymer compositions containing the dual phase fillers are further described.

Using the ISA 84/HAZOP/LOPA procedure to design a safety instrumented system for a fumed silica burner

Abstract: A Cabot team used the ISA 84-2004 (IEC61511-1) standard to evaluate the safety instrumented system (SIS) for an existing fumed silica burner and made practical design changes to reduce the control-related process safety risks. Prior subjective layers of protection reviews and poor definitions for “tolerable risk” had resulted in assigning unreasonably high and impractical safety integrity levels (SIL) on safety critical interlocks. The Team turned to the ISA 84-approved layers of protection analysis (LOPA) procedure and found it to be a more realistic and a less subjective risk evaluation that resulted in a practical, defensible process safety system design. The Team's procedure focused on the following steps within the SIS life cycle: 1Perform a hazard and operability (HAZOP) process hazards analysis (PHA), 2Use PHA/HAZOP software to generate LOPA spreadsheets, 3Populate the LOPA spreadsheets for each risk scenario and compare the risk levels to the corporate risk matrix, 4Design an SIS/SIL to bridge the risk gaps identified using the LOPA, and 5Implement and document the changes. After completing the PHA/LOPA/tolerable risk matrix analysis (Steps 1–3), two scenarios were identified where the process safety risk was marginal and required design improvements. However, the Team struggled with Step 4, the SIS/SIL design, and progress essentially stopped. The Team's key learning, overcoming this roadblock, focused on locating a Certified Functional Safety Expert to complete and verify the SIS/SIL design integrity. Once Step 4 was completed, the Team implemented both identified SIS design improvements (Step 5), reducing the inherent control-related process safety risks with a practical solution. © 2011 American Institute of Chemical Engineers Process Saf Prog, 2011

Toner additive comprising carbon-silica dual phase particles

Abstract: The invention provides a toner composition comprising resin particles, a colorant, and a toner additive, wherein the toner additive comprises carbon-silica dual phase particles, wherein the carbon-silica dual phase particles comprise aggregates of carbon black comprising at least one silicon-containing region, and wherein the carbon-silica dual phase particles are distributed on the surface of the resin particles. The invention also provides a method of preparing the aforesaid toner composition.

Forming conductive features of electronic devices

Abstract: Provided is an aerosol method, and accompanying apparatus, for preparing powdered products of a variety of materials involving the use of an ultrasonic aerosol generator including a plurality of ultrasonic transducers underlying and ultrasonically energizing a reservoir of liquid feed which forms droplets of the aerosol. Carrier gas is delivered to different portions of the reservoir by a plurality of gas delivery ports delivering gas from a gas delivery system. The aerosol is pyrolyzed to form particles, which are then cooled and collected. The invention also provides powders made by the method and devices made using the powders.

Elastomerzusammensetzung mit siliciumoxidhaltigem Füllstoff und Verfahren zu deren Herstellung, sowie Gegenstände, die die Elastomerzusammensetzung enthalten oder daraus hergestellt sind

Abstract: Verfahren zur Herstellung einer Elastomerzusammensetzung, umfassend: Einfuhren eines kontinuierlichen Stroms einer ersten Flussigkeit, umfassend Elastomerlatex, in einen Coagulationsreaktor; Einfuhren eines kontinuierlichen Stroms einer zweiten Flussigkeit, umfassend teilchenformigen Siliciumoxid enthaltenden Fullstoff, unter Druck in den Coagulationsreaktor, um eine Mischung mit dem Elastomerlatex zu bilden, wobei das Einfuhren der zweiten Flussigkeit gegen die erste Flussigkeit in dem Coagulationsreaktor ausreichend energetisch ist, um zumindest einen Teil des Elastomerlatex zu coagulieren, wahrend der Elastomerlatex mit dem teilchenformigen Siliciumoxid enthaltenden Fullstoff in dem Coagulationsreaktor vermischt wird; und auserdem umfassend das Einfuhren mindestens eines Kupplungsmittels und das Einfuhren mindestens eines weiteren Additivs, so dass (A) der teilchenformige Siliciumoxid enthaltende Fullstoff zuerst mit dem Kupplungsmittel in Kontakt kommt, bevor der teilchenformige Siliciumoxid enthaltende Fullstoff mit dem weiteren Additiv in Kontakt kommt und worin das Kupplungsmittel in die Mischungszone oder nachdem die Mischung die Mischungszone verlassen hat, eingefuhrt wird, oder (B) der teilchenformige Siliciumoxid enthaltende Fullstoff zuerst mit dem Kupplungsmittel in Kontakt kommt, bevor der teilchenformige Siliciumoxid enthaltende Fullstoff mit dem weiteren Additiv in Kontakt kommt, und worin der Siliciumoxid enthaltende Fullstoff aus Silicium behandeltem Rus, Siliciumoxid beschichtetem Rus oder einer Mischung von beidem gewahlt wird, oder (C) das Kupplungsmittel und das weitere Additiv ungefahr gleichzeitig eingefuhrt werden, und worin der ...

Carbon black for racing and motorcycle tire treads. performance model development

Abstract: Racing tires and motorcycle tires present individual segments of the tire market. For instance, while the average life of car and truck tires is 50 000 miles, the average life of race tires is 100 miles. Because tires play a critical role in a race, technical demands to assure safety and performance are growing. Similarly, tires have a large influence on safety, handling/grip, and performance of the rapidly growing world fleet of motorcycles, due to the fact of only two wheels being in contact with the ground. Thus, the common feature of both market segments is that the typical tire compromise of wear, rolling resistance, and traction is strongly weighted toward traction. Most of the recent efforts of rubber scientists have been directed toward lowering rolling resistance of the tread compounds, which left a certain void in the science of compounding for racing and motorcycle treads. Particularly, the industrial assortment of polymers and fillers used for motorcycle treads is commonly different f...

Metallic dispersions for inkjet printing

Abstract: A dispersion of silver particles and a method of making the dispersion and ink are described. The dispersion or ink may be an aqueous dispersion or ink and may produce silver images having improved properties such as an improvement in gloss.

Verfahren zum Herstellen von Ruß unter Verwendung eines vorgewärmten Ausgangsmaterials und Apparatur zum Durchführen des Verfahrens

Abstract: Die Erfindung betrifft Verfahren zum Herstellen von Rus unter Verwendung eines Ausgangsmaterials mit einer Temperatur von mehr als etwa 300°C, die mindestens eine Antifoulingmasnahme umfassen Die Erfindung betrifft weiterhin eine Apparatur zum Herstellen von Rus, die in den erfindungsgemasen Verfahren verwendet werden kann