Process development for manufacturing of diatomaceous earth filter aids

1986 ◽  
Vol 3 (1) ◽  
pp. 73-75
Author(s):  
Suk-Ho Yoon
Keyword(s):  
Diatomaceous Earth ◽  
Process Development ◽  
Filter Aids

scholarly journals Innovative regenerable polyamide particles as new filter aids for wine lees filtration

OENO One ◽  
2021 ◽  
Vol 55 (4) ◽  
pp. 197-208
Author(s):  
Marion Breniaux ◽  
Camille Demoulin ◽  
Arnaud Massot ◽  
Rémy Ghidossi
Keyword(s):  
Diatomaceous Earth ◽  
Wine Quality ◽  
Economic Implications ◽  
Organoleptic Characteristics ◽  
Dead End ◽  
Filter Aids ◽  
The Impact ◽  
Filter Aid

In oenology, the conventional dead-end filtration with filter aids, used for the processing of wine lees, consumes a high quantity of diatomaceous earth and brings serious environmental, sanitary and economic implications. In a real concern to improve wine quality and to decrease pollution, the “ecological filtration” concept based on the utilisation of a regenerative filter aid is proposed in this study. Polyamide particles were investigated as innovative filter aids for wine lees filtration. Trials were performed with two grades of polyamide particles D80 (D50 = 91.8 µm) and D100 (D50 = 111 µm). Filtration was carried out with wine added with two concentrations of lees (10.8 % and 20.2 %). The impact on wine quality was determined with oenological analyses, showing that the filtration made with polyamide particles did not modify wine organoleptic characteristics, improved turbidity and the filtrate fluxes are higher in comparison to the usual precoat filtration. Then, polyamide particle regeneration experiments proved that these particles could be reused as filter aids several times after cleaning.

Factors Affecting Transfer of the Heavy Metals Arsenic, Lead, and Cadmium from Diatomaceous-Earth Filter Aids to Alcoholic Beverages during Laboratory-Scale Filtration

2019 ◽  
Vol 67 (9) ◽  
pp. 2670-2678 ◽  
Author(s):  
Benjamin W. Redan ◽  
Joseph E. Jablonski ◽  
Catherine Halverson ◽  
James Jaganathan ◽  
Md. Abdul Mabud ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Diatomaceous Earth ◽  
Laboratory Scale ◽  
Alcoholic Beverages ◽  
Factors Affecting ◽  
Lead And Cadmium ◽  
Filter Aids

scholarly journals STUDY ON TREATMENT OF LAM DONG DIATOMITE FOR FILTER AID MANUFACTURE

2011 ◽  
Vol 14 (3) ◽  
pp. 54-60
Author(s):  
Dang Doan Minh Tran ◽  
Phong Thanh Mai
Keyword(s):  
Electron Microscopy ◽  
Thermal Analysis ◽  
Scanning Electron Microscopy ◽  
Diatomaceous Earth ◽  
X Ray Diffraction ◽  
Fe2o3 Content ◽  
X Ray ◽  
Filter Aids ◽  
Filter Aid ◽  
Scanning Electron

Recent years in Vietnam, diatomaceous earth has been attractive to researchers and manufacturers due to its applications, particularly in the field of filter aid manufacture. In this study, diatomite from Dai Lao valley deposit (Bao Loc, Lam Dong province) was seclected for investigation of its possible application in preparation of filter aids. For this purpose, diatomite ore was characterized and treated in different acids in order to improve the material characteristics for filter aid manufacture. Chemical and physical properties of the raw and treated diatomite were determined using different instruments such as X-ray fluorescence (XRF), X-ray diffraction (XRD), differential thermal analysis (DTA) and scanning electron microscopy (SEM). The obtained results showed that Lam Dong diatomite has low SiO2 (52.9%) and high Fe2O3 content (5.32%). In order to enrich SiO2 and eliminate unnecessary components, different acids (6M H2SO4, 3.5M HCl and 5M HCl) were used. Among acids used, leaching in 6M H2SO4 gave most favorable results. Particularly, after leaching in 6M H2SO4, SiO2 content increased to 90.9% and Fe2O3 content decreased to 0.53%.

Advanced TEM sample preparation techniques for submicron Si devices

1995 ◽  
Vol 53 ◽  
pp. 516-517 ◽  
Author(s):  
P. B. Basham ◽  
H. L. Tsai
Keyword(s):  
Sample Preparation ◽  
Process Development ◽  
Light Transmission ◽  
Specific Area ◽  
Turnaround Time ◽  
Small Hole ◽  
Area Of Interest ◽  
Transmission Electron ◽  
Polished Side ◽  
Preparation Techniques

The use of transmission electron microscopy (TEM) to support process development of advanced microelectronic devices is often challenged by a large amount of samples submitted from wafer fabrication areas and specific-spot analysis. Improving the TEM sample preparation techniques for a fast turnaround time is critical in order to provide a timely support for customers and improve the utilization of TEM. For the specific-area sample preparation, a technique which can be easily prepared with the least amount of effort is preferred. For these reasons, we have developed several techniques which have greatly facilitated the TEM sample preparation.For specific-area analysis, the use of a copper grid with a small hole is found to be very useful. With this small-hole grid technique, TEM sample preparation can be proceeded by well-established conventional methods. The sample is first polished to the area of interest, which is then carefully positioned inside the hole. This polished side is placed against the grid by epoxy Fig. 1 is an optical image of a TEM cross-section after dimpling to light transmission.

The Structure and Properties of MoSi2 Thin Film in Mos Process

1980 ◽  
Vol 38 ◽  
pp. 326-327
Author(s):  
C.K. Wu ◽  
P. Chang ◽  
N. Godinho
Keyword(s):  
Thin Film ◽  
Integrated Circuits ◽  
High Performance ◽  
Large Scale ◽  
Process Development ◽  
Structure And Properties ◽  
Metal Silicides ◽  
High Oxidation ◽  
Important Approach ◽  
High Oxidation Resistance

Recently, the use of refractory metal silicides as low resistivity, high temperature and high oxidation resistance gate materials in large scale integrated circuits (LSI) has become an important approach in advanced MOS process development (1). This research is a systematic study on the structure and properties of molybdenum silicide thin film and its applicability to high performance LSI fabrication.

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