Перегляд за Автор "Hrininh, Kateryna"

Зараз показуємо 1 - 10 з 10

Ascertainment of the addiction of the temperature of the working bodies on the grinding degrees of pigment suspension on the basis of acetyltributyl citrate on the industrial three-roll mill
(2018) Hrininh, Kateryna; Hordeichuk, Ruslan
It was conducted the research for a purpose to determine the dependence of the temperature of the working members of the roll mill on the degree of grinding of the pigment suspension. The degree of grinding was carried out with a "Klin" grindometer, the temperature was measured by a noncontact pyrometer. Than smaller the particle size that needs to be grinded, than greater the energy needed to lead to the process, and the more heat will be released. When the suspension is grinded, its temperature increases from 26.4 to 32.6 С, with the intensive increase in temperature from 29.3 to 32.6 C, and the particle size decreases from more than 90 μm to 10 μm, with the most intensive grinding for the first pass.
Change in granulometrical composition of suspensions of medicinal and cosmetic products during processing in a bead mill
(2022) Omelianenko, Kostiantyn; Yaremchuk, Pavlo; Gubenia, Oleksii; Hrininh, Kateryna
It is studied the change in the particle size composition of medical and cosmetic suspensions during processing in a bead mill. Suspensions according to two recipes were ground on an experimental unit — a laboratory bead mill of periodic action. Suspensions based on castor refined oil Ph. Eur. and iron oxide pigment "Red 120" were chosen as model samples. The change in particle size composition and the degree of grinding were researched by light microscopy using a digital monocular camera. A curve of the degree of grinding during grinding shows that the compositions of the suspensions within the studied range are actively grinded. The resulting particle size distribution diagrams illustrate the dynamics of the formation of a monodisperse system. The curve of the degree of grinding and the size distribution diagrams demonstrates that suspensions with a higher content of the solid phase are crushed more intensively and have a more pronounced monodispersity. It can be concluded that for the production of medicinal and cosmetic products it is advisable to use formulations of suspensions which have a higher concentration of the solid phase in their composition. The obtained results of studies on changes in the granulometric composition of suspensions allow monitoring and adjusting the necessary parameters of the ultrafine grinding process to achieve the required product quality.
Comparative analysis of equipment and research the superfine grinding process of titanium dioxide and quinacridone red suspensions in the bead mill
(2018-06) Hrininh, Kateryna; Hordeichuk, Ruslan; Gubenia, Oleksii
Introduction. Analytical and experimental research was conducted to improve the process and equipment for the superfine grinding of medicinal and cosmetic preparations. Materials and methods. On the basis of modern scientific literature and own experience was given a comparative analysis of modern equipment for ultra-fine grinding. In the investigation are used suspensions of titanium dioxide and quinacridone red 122 with the vaseline oil. Results and discussion. Among the recommended installations, the most versatile, productive, compact, energy saving, with high degree for grinding (up to 1 microns), effective in the process of dispersion and homogenization, have a simple constructive solution are bead mills. When grinding titanium dioxide over a period of 0 to 30 minutes, the power increases from 205 to 209 W. The temperature of the suspension is from 21.9 to 23.4 °C, the density increases from 889 to 1176 kg/m3, and the particle size decreases from more than 100 μm to 10 μm. The most intensive grinding in the first 5 minutes of the process. When the quinacridone red 122 is grinded, the power is increased from 205 to 210 W, the temperature of the suspension is from 22.4 to 24.3 °C, the density increases from 870 to 952 kg/m3, and the particle size decreases from more than 60 μm to 2 μm, while the most intensive grinding occurs in the first 5 minutes of the process. Conclusions. Among the recommended installations, the most optimal and productive are bead mills. It is recommended to carry out the grinding process on the bead mills periodically with the circulation of the suspension with the obligatory cooling.
Energy parameters of the process of ultrafine grinding og medical and cosmetic components in the bead mill
(2021) Hrininh, Kateryna; Gubenia, Oleksii; Chepeliuk, Olena
The process of ultrafine grinding of components of medicines and cosmetics in a laboratory bead mill is considered. The purpose of the study is (1) to determine the energy parameters of the process of ultrafine grinding of medicinal and cosmetic components in a bead mill, as well as (2) to determine the dependences of changes in technological parameters. A suspension of castor oil and cosmetic pigment in a ratio of 60% oil and 40% pigment was used as a model body. A series of experiments was carried out, where the degree of grinding was determined using a microscope with a built-in camera and software, the temperature was measured with ds18b20 temperature sensors, the power was measured with a three-phase CNFAJ Intelligent Power Meter. When grinding the pigment "red 120" for a period of time from 0 to 45 minutes, the power decreases, the temperature of the "beads-product" system increases, and the particle size decreases. This process occurs most intensively in the first 5 minutes. Most of the energy is spent on the work, which is spent on mixing the system "beads-product", and the work, that is spent on heating the structural components of the product and the parts of the mill interacting with them, which, in turn, depend on rheological properties of the suspension.
Energy parameters of ultrafine grinding of pharmaceutical and cosmetic ingredients in the bead mill
(2020) Hrininh, Kateryna; Gubenia, Oleksii
The energy parameters of the grinding process of the components of pharmaceutical and cosmetic preparations in a bead mill are considered. The purpose of research - to determine the energy parameters of ultrafine grinding of pharmaceutical and cosmetic ingredients in the bead mill. A series of experimenters was conducted where the degree of grinding was measured using USB Digital Microscope and software, the temperature was measured with a TPM-10 electronic thermometer, and the power was measured with a CNFAJ Intelligent Power Meter three-phase wattmeter. As a result of the study, we can conclude that most of the energy is spent on the work of mixing the beadproduct system and the work spent on heating the structural components of the product and the interacting parts of the mill, which, in turn, depend on the rheological properties of the suspension.
Features of a ultra-fine grinding by wet metod in bead mills
(2017) Hrininh, Kateryna; Gubenia, Oleksii
It was conducted an analytical review of the features of ultra-fine grinding in bead mills by wet method. The aim of the study was to reveal unexplored features of ultra-fine grinding processes by wet metod in bead mills with their subsequent study. As a result of the analysis, a relationship was found between mechanical energy and the degree of dispersion by grinding the suspension, the intensity of grinding over time, the temperature rise of the suspension, depending on the degree of dispersion. As a result of the analysis, no relatioship was found between the temperature rise of the grinding material and the power, the density of the dispersing suspension and its viscosity. In further studies, special attention should be paid to the relationship between the density of each of the dry bulk components and their wet mixes with energy that is consumed for grinding, the relationship of the degree of grinding to the time that is spent on achieving a given parameter, and what part of the mechanical energy is converted into heat in depending on the grinding time.
Formation of suspension structure in the process of grinding in bead mills
(2020) Hrininh, Kateryna; Gubenia, Oleksii; Telychkun, Yuliia
It has been investigated the rheological properties of the suspension of farmaceutical and cosmetics preparates during grinding at an experimental laboratory bead mill of periodic action. The rheological characteristics have been investigated on a rotary viscometer Reotest 2. as a result of the research, the flow curve of the suspension during grinding has been constructed and it has been found that within the investigated range the product does not change the character of flow regardless of measurement time and temperature. Analysis of the curve of the suspension during grinding revealed features which explain formation of the structure. The dependence of the effective viscosity on the shear rate during grinding of the suspension is polynomial and confirms the non Newtonian character of the product and is defined as a linear plastic body. The investigated finished product has 6.5 time’s higher viscosity in relation to pure castor oil, which is explained by the high dry matter content (40 %) and the increase in the newly formed area. The viscosity of the suspension varies depending on the temperature: cooled to 20 °C, the finished product has a viscosity of 22.5% higher than immediately after the grinding process with a temperature of 34 °C
Improvement of process and equipment for homogenization of ointments and pastes
(2020) Mykhailyshyn, Sviatoslav; Hrininh, Kateryna; Bandura (Kuzmyk), Uliana; Gubenia, Oleksii
The scientific novelty of the results is to obtain a number of dependences of the viscosity of ointments and pastes on the shear rate and temperature. The practical value is to improve the design of the homogenizer and, accordingly, to reduce the time of homogenization.
Investigation the process of superfine grinding of components of pharmaceutical and cosmetic products on the bead mill
(2018) Hrininh, Kateryna; Hordeichuk, Ruslan; Gubenia, Oleksii
The process of grinding the components of pharmaceutical and cosmetic preparations in a bead mill is considered. The degree of grinding was measured with a "Klin" grindometer, the temperature was measured by a contactless pyrometer, the power was measured by current clamps. The smaller the particle size and the higher density of the suspension, the greater the energy required to conduct the process, and the more heat will be released. When grinding titanium dioxide over a period of 0 to 30 minutes, the power increases from 205 to 209 W, with the most intensive increase observed in the interval from 5 to 10 minutes at 2.33 W. In addition, the temperature of the suspension increases from 21.9 to 23.4 °C, the density of the suspension increases from 889 to 1176 kg/m3, and the particle size decreases from more than 100 μm to 10 μm, the most intensive grinding in the first 5 minutes of the process. When the quinacridone red Red 122 is grinded, the power is increased from 205 to 210 W, the slurry temperature is from 22.4 to 24.3 °C, the density is from 870 to 952 kg/m3, and the particle size decreases from more than 60 μm to 2 μm, while the most intensive grinding occurs in the first 5 minutes of the process.
Review of the working bodies of vertical bead mills
(2019) Hrininh, Kateryna; Gubenia, Oleksii; Litovchenko, Igor
It is considered existing configurations of the working members of vertical bead mills for grinding cosmetic, pharmaceutical and food products by a wet method. In standard designs of rotors with disks and / or pins, due to the presence of centrifugal forces, there is a stagnant zone in which the movement of the beads and the product is practically not observed. As a result of which the product has an uneven particle size distribution and the time spent on the process increases. the configuration of the rotor with a reduced annular gap provides a reduction in the time of grinding of solid materials in suspension, with a smaller volume of the grinding chamber.