Method for controlling sheeting in gas phase reactors
Method for reducing sheeting during polymerization of alpha-olefins: : Chirillo et al. 4810397: ... or ≧±0.5 nanoamps/cm 2, or greater, action will be taken to reduce or eliminate the static charge in being detected at one or more of the entrainment zone probes. Such action may be addition of at least one continuity additive (or a ...Web
اقرأ أكثرReview of BiScO3-PbTiO3 piezoelectric materials for
BiScO 3-PbTiO 3 (BS-PT) system has been extensively investigated over two decades since the discovery in 2001 for its high piezoelectric coefficient and high Curie temperature (higher 100 °C than Pb(Zr,Ti)O 3).However, there has not been a systematic review to summarize those achievements of BS-PT material in recent years. In this …Web
اقرأ أكثرMY104347A
a method for reducing sheeting during polymerization of alpha-olefins by feeding either a positive charge generating or negative charge generating chemical additive to the reactor responsive to particular static levels in the reactor. the chemical additive is added in amounts which neutralize the charges in the reactor.Web
اقرأ أكثرEP0224479B1
EP0224479B1 EP85902902A EP85902902A EP0224479B1 EP 0224479 B1 EP0224479 B1 EP 0224479B1 EP 85902902 A EP85902902 A EP 85902902A EP 85902902 A EP85902902 A EP ...Web
اقرأ أكثرProcess for reducing sheeting during polymerization of alpha-olefins
What is claimed is: 1. An improvement in the method for polymerization of alpha-olefins in a fluidized bed reactor utilizing titanium based catalysts prone to cause sheeting during said polymerization, the improvement comprising maintaining the static electric charge in said reactor at the site of possible sheet formation below static voltage levels which would …Web
اقرأ أكثرEffect of fluidizing particle size on electrostatic charge generation
Highlights. This work investigated the effect of polyethylene particle size on reactor fouling. Overall smaller particles had a higher charge and resulted in more reactor fouling. Significant particle fouling found for sizes smaller than 600 μ in bubbling. Non-sieved particles adhered to the wall had similar size as the smallest fraction. q/m measured …Web
اقرأ أكثرSG2792G
Method for reducing sheeting during polymerization of alpha-olefins FR2646426B2 (fr) * : : Bp Chemicals Sa ... Method for reducing sheeting and static charges during polymerization of ethylene polymers US5416175A (en) * : : Union Carbide Chemicals & Plastics Technology Corporation ...Web
اقرأ أكثرUltrahigh dielectric breakdown strength and excellent
The results showed that the introduction of Sc ions can reduce the sintering temperature to 1250 °C. When the concentration of Sc ions was 1.0 mol % and 2.0 mol %, the high dielectric constants ...Web
اقرأ أكثرBalancing charge dissipation and generation
The static charge on the PTFE beads was initially stable and able to be preserved for long periods of time (e.g., hours to days). Upon UV radiation, coumarin 6 became polar and increased the overall polarity of the solution. In this case, the static charge on the PTFE beads was observed to dissipate into the solution faster (e.g., tens of ...Web
اقرأ أكثرOA09225A
A method of reducing sheet formation during the polymerization of alpha-olefins. Info Publication number OA09225A. OA09225A OA59500A OA59500A OA09225A OA 09225 A OA09225 A OA 09225A OA 59500 A OA59500 A OA 59500A OA 59500 A OA59500 A OA 59500A OA 09225 A OA09225 A OA 09225A Authority OA OAPI Prior art keywords olefinsWeb
اقرأ أكثرUS5391657A
A method for reducing sheeting during polymerization of an alpha-olefin by feeding either a positive charge generating (MgO, ZnO, Al 2 O 3, CuO, and mixtures thereof) or a negative charge generating (V 2 O 5, SiO 2, TiO 2, Fe 2 O 3, and mixtures thereof) inorganic chemical additive to the reactor responsive to particular static levels in the reactor.The …Web
اقرأ أكثرAU620824B2
AU620824B2 AU24656/88A AU2465688A AU620824B2 AU 620824 B2 AU620824 B2 AU 620824B2 AU 24656/88 A AU24656/88 A AU 24656/88A AU 2465688 A AU2465688 A AU 2465688A AU 620824 B2 AU62082Web
اقرأ أكثرIE61052B1
A method for reducing sheeting during polymerization of alpha-olefins by feeding either a positive charge generating or negative charge generating chemical additive to the reactor responsive to particular static levels in the reactor. The chemical additive is added in amounts which neutralize the charges in the reactor.Web
اقرأ أكثرEP0315192A1
EP0315192A1 EP88118424A EP88118424A EP0315192A1 EP 0315192 A1 EP0315192 A1 EP 0315192A1 EP 88118424 A EP88118424 A EP 88118424A EP 88118424 A EP88118424 A EP ...Web
اقرأ أكثرMY104347A
during polymerization sheeting during reactor Prior art date Application number MYPI88001269A Other languages English (en) Inventor Gregory Goode Mark Edward Spriggs Thomas James Mcneil Thomas Mark Hasenberg Daniel Original Assignee Union Carbide Corp Priority date (The priority date is an assumption and is not …Web
اقرأ أكثرUS5416175A
A method for reducing sheeting during polymerization of alpha-olefins in a fluidized bed employing catalysts prone to cause sheeting which comprises feeding a material carrying a static electric charge opposite to the static charge in said bed, said opposite charge of said material being generated by passing said material in contact with a surface adapted …Web
اقرأ أكثرEP0315192B1
EP0315192B1 EP88118424A EP88118424A EP0315192B1 EP 0315192 B1 EP0315192 B1 EP 0315192B1 EP 88118424 A EP88118424 A EP 88118424A EP 88118424 A EP88118424 A EP ...Web
اقرأ أكثرGR3002568T3
during polymerization sheeting during reducing sheeting Prior art date Application number GR90401200T Other languages Greek (el) Inventor Mark Gregory Goode Daniel Mark Hasenberg Thomas James Mcneil Thomas Edward Spriggs Original Assignee Union Carbide Corp Priority date (The priority date is an assumption …Web
اقرأ أكثرRectifying behavior and transport mechanisms of
The I–V curves under forward and reverse bias are shown in Fig. 2, which clearly demonstrate a backward diode-like rectifying behavior.The rectification ratio is about 85 (1 0 1) at bias voltage 3 V (4 V).. Download : Download full-size image Fig. 2. The I–V curves in log-log scale for the Pt/BTO/NSTO structure. Maximum voltages are 2 V (open …Web
اقرأ أكثرElectrostatic Charges and Their Effects on Weighing
Various tips and recommendations are provided on how to reduce the effects of static in a weighing environment. In addition, established solutions for deionisation of the weighing vessel or sample …Web
اقرأ أكثرUS4803251A
US4803251A US07/116,538 US11653887A US4803251A US 4803251 A US4803251 A US 4803251A US 11653887 A US11653887 A US 11653887A US 4803251 A US4803251 A US 4803251A Authority US UniteWeb
اقرأ أكثرUS4532311A
US4532311A US06/650,571 US65057184A US4532311A US 4532311 A US4532311 A US 4532311A US 65057184 A US65057184 A US 65057184A US 4532311 A US4532311 A US 4532311A Authority US UniteWeb
اقرأ أكثرUS4855370A
US4855370A US06/914,443 US91444386A US4855370A US 4855370 A US4855370 A US 4855370A US 91444386 A US91444386 A US 91444386A US 4855370 A US4855370 A US 4855370A Authority US UniteWeb
اقرأ أكثرDefect engineering toward the structures and dielectric
This study demonstrates that the construction of defect clusters with strong electron-pinning effects is an effective method for obtaining giant dielectric ceramics with ultralow loss and temperature/DC bias stability.Web
اقرأ أكثرMethod for reducing sheeting during polymerization of alpha …
A method for reducing sheeting during polymerization of alpha-olefins by feeding either a positive charge generating or negative charge generating chemical additive to the reactor responsive to particular static levels in the reactor.Web
اقرأ أكثرCA1311876C
METHOD FOR REDUCING SHEETING DURING POLYMERIZATION OF ALPHA-OLEFINS ABSTRACT A method for reducing sheeting during polymerization of alpha-olefins by feeding either a positive charge generating or negative charge generating chemical additive to the reactor responsive to particular static levels in the reactor. The chemical additive …Web
اقرأ أكثرMethod for reducing sheeting during polymerization of alpha …
A method for reducing sheeting during polymerization of alpha-olefins by feeding either a positive charge generating or negative charge generating chemical additive to the reactor responsive to particular static levels in the reactor. The chemical additive is added in amounts which neutralize the charges in the reactor. ... Boland & Al Salim ...Web
اقرأ أكثرZA888288B
Method for reducing sheeting during polymerization of alpha-olefins Info ... South Africa Prior art keywords olefins alpha during polymerization sheeting during reducing sheeting Prior art date Application number ZA888288A Other languages English (en) Inventor Mark Gregory Goode Gregory Goode Mark Daniel Mark HawenbergWeb
اقرأ أكثرAntistatic agents
dust attraction, reducing clarity, and damaging aesthetic appeal. Static charge is also reflected in the tendency for films to cling. Processing is some times affected, including reduced ease of removal from the mould, and there is the possibility of damage to processing machinery. Static charge can damage electronic components in computers.Web
اقرأ أكثرStatic Charge
29.1.4 Problem 4—Static Charge Buildup on Sheet. Static charge can build up on the sheet as it is being processed either through a three-roll stack or over individual chill rolls, creating surface contamination by attracting airborne foreign material. Proper equipment grounding plus an alternative method, such as copper gauze running across ...Web
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