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Hua Bai

Hua Bai, Lake Jackson, TX US

Patent application numberDescriptionPublished
20100009098ATMOSPHERIC PRESSURE PLASMA ELECTRODE - An improved electrode useful for modifying a substrate using corona discharge dielectric barrier discharge or glow discharge plasma treatment or coating a substrate using plasma enhanced chemical vapor deposition under atmospheric or near atmospheric pressure conditions, the electrode having a body defining a cavity therein, the body having at least one inlet passageway there through in gaseous communication with the cavity so that a gas mixture can be flowed into the cavity by way of the at least one inlet passageway, the electrode having at least one outlet passageway there through in gaseous communication with the cavity so that a gas that is flowed into the cavity can flow out of the cavity by way of the at least one outlet passageway, the at least one outlet passageway being a slot. The improvement is to position a porous body in the cavity sealed to the wall of the cavity adjacent to the outlet passageway so that a gas that is flowed into the cavity will pass through the porous body before flowing through the outlet passageway.01-14-2010
20110087054ISOTHERMAL MULTITUBE REACTORS AND PROCESSES INCORPORATING THE SAME - The present invention provides isothermal multitube reactors suitable for the production of chlorinated and/or fluorinated propene and higher alkenes from the reaction of chlorinated and/or fluorinated alkanes and chlorinated and/or fluorinated alkenes. The reactors utilize a feed mixture inlet temperature at least 20° C. different from a desired reaction temperature.04-14-2011
20110087056ADIABATIC PLUG FLOW REACTORS AND PROCESSES INCORPORATING THE SAME - The present invention provides adiabatic plug flow reactors suitable for the production of chlorinated and/or fluorinated propene and higher alkenes from the reaction of chlorinated and/or fluorinated alkanes and chlorinated and/or fluorinated alkenes. The reactors comprise one or more designs that minimize the production of by-products at a desired conversion.04-14-2011
20110094120DEVICE TO DRY CATALYST ROASTER CONVEYOR BELT AND METHOD OF USING SAME - A system and process for removing an inorganic salt from a catalyst roaster belt is disclosed. The system includes an apparatus with a drying vessel having a catalyst roaster belt inlet, a catalyst roaster belt outlet, a heating medium inlet, and a heating medium outlet, wherein the catalyst roaster belt inlet and the catalyst roaster belt outlet are spaced apart along a first direction, the heating medium inlet and the heating medium outlet are spaced apart along a second direction, the heating medium inlet is spaced apart from the catalyst roaster belt inlet in the second direction, and the catalyst roaster belt inlet is between the heating medium inlet and the heating medium outlet along the second direction. The system includes an acid bath and a moveable catalyst roaster belt extending from the acid bath through the catalyst roaster belt inlet and through the catalyst roaster belt outlet. The process includes the steps of providing a catalyst roaster belt with an inorganic salt disposed thereon and supplying a heating medium to a first side of the catalyst roaster belt such that heat from the heating medium flows through the catalyst roaster belt to a second side of the catalyst roaster belt to vaporize the inorganic salt.04-28-2011
20110228630Reduced Transit Static Mixer Configuration - Excessive residence time in the conduits located between the outlet of a static mixer and a reactor/separator reservoir can lead to undesired by-products, formation of solids, and conduit fouling. This disclosure relates to an improved configuration for a static mixer with reduced transitory time to help reduce the creation of undesired by-products and fouling during the process of mixing, and more particularly to a phosgene reactor comprising a short or very short conduit for reducing the transit time from the static mixer to a reactor/separator reservoir to one second or less.09-22-2011
20110268378Journal Bearing Design - The present disclosure relates to bearings, for example, an improved journal bearing. A bushing (11-03-2011

Patent applications by Hua Bai, Lake Jackson, TX US

Hua Bai, Zhejiang CN

Patent application numberDescriptionPublished
20090281049New use of ginsenoside compound-k in manufacturing medicaments - Use of ginsenoside Compound-K, which structural formula is the following:11-12-2009
20100286437PREPATATION METHOD OF RIVASTIGMINE, ITS INTERMEDIATES AND PREPARATION METHOD OF THE INTERMEDIATES - The present invention provides N-methylethylcarbamino-3-[(S)-1-(methyl-[(S)-1-phenylethyl]amino)ethyl]phenyl ester represented by formula (II) and its preparation method. The present invention also provides (S)-1-(3-methoxyphenyl)-N-methyl-N—[(S)-1-phenylethyl]ethylamine and 3-[(S)-1-(methyl-[(S)-1-phenylethyl]amino)ethyl]phenol as intermediates of the compound represented by formula (II), and the use of the compound represented by formula (II) for preparing rivastigmine used for treating Alzheimer disease.11-11-2010
20100311796 METHOD FOR THE SEPARATION AND PURIFICATION OF EPOTHILONES - The invention discloses a method for the separation and purification of epothilones, especially discloses a method for the separation and purification of epothilones B and A using normal phase silica gel chromatography, which comprises loading the sample after dissolving the sample containing epothilones B and A with C12-09-2010

Hua Bai, Taizhou CN

Patent application numberDescriptionPublished
20090142813PROCESSES FOR THE PRODUCTION OF L-CITRULLINE - Processes for producing a suitable purity grade of L-Citrulline are disclosed. The processes can include contacting crude L-Citrulline in an aqueous solution with an adsorptive medium at a temperature above approximately 50° C. and below the temperature of denaturement for the L-Citrulline for an interval sufficient to remove at least one contaminant from the L-Citrulline. The processes can also include concentrating the dissolved L-Citrulline relative to the aqueous solution.06-04-2009

Hua Bai, San Jose, CA US

Patent application numberDescriptionPublished
20120038288METHOD AND SYSTEM FOR EXTENDING PWM DIMMING RANGE IN LED DRIVERS - An apparatus for driving a light emitting diode (LED). A rising edge of a pulse width modulation (PWM) signal is first sensed. Upon sensing the rising edge, a threshold pulse (TP) signal is initiated that has a configured width started when the rising edge is sensed, an LED current with an amplitude at a previously set level is generated, and starting to charge a capacitor which yields a voltage Vcap. Subsequently, a falling edge of either the PWM signal or the TP signal is detected. Upon detecting the failing edge, the circuit stops charging the capacitor, samples, after a first delay from the detected falling edge, the voltage Vcap, and adjusts a level of the amplitude of the LED current based on the sampled voltage Vcap. When the falling edges of both the PWM and TP signal are detected, the LED current is terminated.02-16-2012