Abstract:
The present invention provides a catalyst used in the production of PBS or its copolyesters and the preparation method thereof. The method comprises the following steps: (1) adding titanium alkoxide, silicon alkoxide, dihydric alcohol and metal co-catalyst into the solvent and conducting the reaction at a temperature of about 80° C. to 180° C., then removing the unreacted materials and small molecular products in the reaction system; (2) adding complexing agent into the reaction system, then collecting catalyst from the products obtained in this step. Moreover, the method may comprises steps of: (1) adding titanium alkoxide, dihydric alcohol and metal co-catalyst into the solvent and conducting the reaction at a temperature of about 80° C. to 180° C., then removing the unreacted materials and small molecular products in the reaction system; (2) adding silicon alkoxide and complexing agent into the reaction system, then collecting catalyst from the products obtained in this step. The catalyst in the present invention has higher activity and thus the catalyst additional amount is reduced which will improve the quality of the products. Moreover, the catalyst in the present invention could be used alone in the production of PBS or its copolyester without the need for other materials and it won't react with water and thus could be stored for a long time. In sum, the catalyst in the present invention has a broad prospect in industrial application.
Abstract:
Apparatus and methods of determining a connection quality between a communication device and a communications network comprise receiving from the communication device at least one of a communication device processor-generated event code and a corresponding communication device processor-generated event data based on execution of a predetermined connection quality configuration by the communication device. The processor-generated event code and the processor-generated event data correspond to connection quality aspects of a communication between the communication device and the communications network. Additionally, this aspect of the method further comprises generating a connection quality characteristic associated with the communication according to analysis of at least one of the processor-generated event code and the processor-generated event data by a connection quality state machine, and storing the generated connection quality characteristic corresponding to the communication.
Abstract:
Apparatus and methods of determining a connection quality between a communication device and a communications network comprise receiving from the communication device at least one of a communication device processor-generated event code and a corresponding communication device processor-generated event data based on execution of a predetermined connection quality configuration by the communication device. The processor-generated event code and the processor-generated event data correspond to connection quality aspects of a communication between the communication device and the communications network. Additionally, this aspect of the method further comprises generating a connection quality characteristic associated with the communication according to analysis of at least one of the processor-generated event code and the processor-generated event data by a connection quality state machine, and storing the generated connection quality characteristic corresponding to the communication.
Abstract:
A regenerating method for activated alumina used in regenerating working fluid of hydrogen peroxide comprises the following steps: adding deactivated alumina discharged from a regenerating bed for working fluid of hydrogen peroxide with fire resistant alumina into a reactor through the top of the reactor and settling by gravity, oxidizing atmosphere entering into the reactor from the bottom of the reactor and running upwardly, discharging regenerated alumina and fire resistant alumina through the discharging device on the bottom of the reactor, discharging exit gas through the discharge port on the top of the reactor, the reaction temperature ranging from 360-800° C., the residence time of solid feed in the reactor ranging from 3-15 h. The method is economic, environment-protective, safe, and low-costly. The regenerated alumina will not poison palladium catalyst.
Abstract:
A regenerating method for activated alumina used in regenerating working fluid of hydrogen peroxide comprises the following steps: adding deactivated alumina discharged from a regenerating bed for working fluid of hydrogen peroxide with fire resistant alumina into a reactor through the top of the reactor and settling by gravity, oxidizing atmosphere entering into the reactor from the bottom of the reactor and running upwardly, discharging regenerated alumina and fire resistant alumina through the discharging device on the bottom of the reactor, discharging exit gas through the discharge port on the top of the reactor, the reaction temperature ranging from 360-800° C., the residence time of solid feed in the reactor ranging from 3-15 h. The method is economic, environment-protective, safe, and low-costly. The regenerated alumina will not poison palladium catalyst.
Abstract:
The present invention discloses a stove burner. The present invention, by designing the outer-ring fire cover body and the outer fire-spraying ring into two independent structures, enables the outer-ring fire cover body to be made of a heat-resisting material of low price, which reduces the manufacturing cost of the entire stove burner; besides, with the outer edge of the annular cover body plate in contact with the top of the outer fire-spraying ring and the cover body ring attached to the sidewall of the inner ring tube close to the gas inlet tube, this structure can better achieve good airtightness of the annular chamber.
Abstract:
A regenerating method for activated alumina used in regenerating working fluid of hydrogen peroxide comprises the following steps: adding deactivated alumina discharged from a regenerating bed for working fluid of hydrogen peroxide into a reactor through the top of the reactor and settling by gravity, oxidizing atmosphere entering into the reactor from the bottom of the reactor and running upwardly, then discharging exit gas and regenerated alumina through the discharge port on the top and discharging device on the bottom of the reactor respectively. The method is economic, environment-protective, safe, low-costly. The regenerated alumina will not poison palladium catalyst.
Abstract:
A regenerating method for activated alumina used in regenerating working fluid of hydrogen peroxide comprises the following steps: adding deactivated alumina discharged from a regenerating bed for working fluid of hydrogen peroxide into a reactor through the top of the reactor and settling by gravity, oxidizing atmosphere entering into the reactor from the bottom of the reactor and running upwardly, then discharging exit gas and regenerated alumina through the discharge port on the top and discharging device on the bottom of the reactor respectively. The method is economic, environment-protective, safe, low-costly. The regenerated alumina will not poison palladium catalyst.
Abstract:
During inter-radio access technology (IRAT) handover between LTE and eHRPD technologies, Internet protocol (IP) service continuity at a user equipment (UE) may be maintained. Thus, a method, an apparatus, and a computer program product are provided for maintaining the IP service continuity during IRAT handover from an SRAT to a TRAT within an evolved packet core (EPC)—capable region. The apparatus attempts to transfer an EPC context to a TRAT, determines that a failure occurs when attempting to transfer the EPC context to the TRAT, and attempts to maintain at least one IP service continuity within the EPC context according to the failure. The attempt to maintain may include an attempt to maintain an entire EPC context or a set of parameters including at least one of an IP address, a domain name system (DNS) address, a proxy call session control function (P-CSCF) address, or a quality of service (QoS).