caustic alkali
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2021 ◽  
Vol 18 (3) ◽  
pp. 102-103
Author(s):  
V. G.

Grlssner (Wiener kl Woch .. 1921, No. 47) warmly recommends for this purpose a 0.2-0.4% solution of caustic soda with aq. menthae piperitae, 50 timing. every 2 hours, with the entire treatment lasting from 2 to 3 months. Caustic alkali has a threefold effect on the stomach wall: 1) neutralizing, 2) destroying enzymes and 3) cauterizing. It is tolerated by patients very well and usually gives a quick effect in the sense of the disappearance of pain and other subjective disorders.


2020 ◽  
Author(s):  
Andrei A. Shoppert ◽  
Irina V. Loginova ◽  
Denis A. Rogozhnikov

This paper describes the studies of the use of red muds as adsorbents for cleaning solutions from As(V). The red mud is a waste that contains a large amount of iron oxides and hydroxides, which are excellent adsorbents of arsenic, especially those possessing magnetic properties and large specific surface area. The purpose of the experiment was to study the possibility of obtaining an effective adsorbent by direct extraction of alumina from bauxite using the caustic alkali fusion method and optimization of the process. The main iron-containing phase of the red muds obtained by fusing bauxite with caustic alkali was maghemite, which has a large specific surface area. Arsenic adsorption experiments were carried out using red muds obtained through bauxite alkali fusing at different temperatures and time of fusion, as well as the mass ratio of caustic alkali to bauxite. The red muds obtained by fusing bauxite with caustic alkali at 400∘ C and NaOH to bauxite mass ration 1.5 within 70 minutes have the highest effectiveness removing arsenic. Their As(V) uptake capacity was over than 37 mg/g. Keywords: red mud, maghemite, nanoparticles, As(V) adsorption, optimization


2020 ◽  
Author(s):  
Yıldırım İsmail Tosun

There have been very few transport studies of caustic alkali slurry (metal fines-caustic alkali salt mixture). Bath serpentinite particle size changed the heat conductivity to salt bath. A major reason is that the retention time in fixed film processes is longer than in solid–gas processes. This allows more time to the heat absorption for cracking to the desorbed persistent compounds. Furthermore, heavy serpantinite allows an sufficient intimate contact between coal and biomass surface pores and gas atmosphere in the furnace due to more pyrolysis gas desorption. For seeing the sustainability sequestration and environmental concerns in feasibility sight, the microwave heating technologies encompassing natural carbonation, precipitates for soil remediation and toxic gas sorption was offered to be adopted in Şırnak Asphaltite/Batman Oil Fields cases. In many places, amine sequestration techniques can work synergistically for better results. This study determines to a great extent both the high rate and degree of carbonation under pressurized sludge at 5–10 bar so it was found that, a porous sludge bath over 45% sludge was more efficiently conducted even at a low amount serpantinite slime weight rate, below weight rate of 15%.


Author(s):  
E. E. Shehata

Soap is sodium or potassium salt of fatty acid produced by saponification reaction. The physicochemical properties of soaps determine their quality and hence determine their efficiency. Four toilet soaps from local markets in Saudi Arabia were analyzed for moisture, pH, free caustic alkali or free fatty acid, total fatty matter and insoluble matter in alcohol. The percentage of the moisture ranged between (3.0534±0.1782 -5.1235±0.4891 %), total fatty matter (79.6907± 0.0534 - 94.8253 ± 0.0622), insoluble matter in alcohol (0.7939± 0.0134 - 1.0368± 0.0234% (and there is no excess free caustic alkali. However, the pH values between (8.715±0.0219 - 9.745±0.0212). This study showed that the percent of moisture, free caustic alkali, insoluble matter, total fatty matter and pH values for different samples found to be in limited range. Finally, the percentage of free fatty acid are (1.0433±0.0813 -1.4107±0.1731%). The soaps analyzed proved to be of high quality and meet the standard values.


Minerals ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 60 ◽  
Author(s):  
Andrei Shoppert ◽  
Irina Loginova ◽  
Denis Rogozhnikov ◽  
Kirill Karimov ◽  
Leonid Chaikin

This study investigates the use of red muds as adsorbents for As (V) removal. Red mud is a waste that contains a large amount of iron oxides and hydroxides, which are excellent adsorbents of arsenic, especially those possessing magnetic properties and a large specific surface area. The purpose of the experiments was to study the possibility of obtaining an effective adsorbent by the direct extraction of alumina from bauxite using the caustic alkali fusion method and to compare the arsenic removal effectiveness and other properties of these red muds with industrial samples. Red muds were described using methods such as X-ray diffraction spectrometry (XRD), X-ray fluorescence spectrometry (XRF), SEM, vibrating sample magnetometry (VSM), and the Brunauer–Emmett–Teller (BET) method. The main iron-containing phase of the red muds obtained by fusing bauxite with caustic alkali is maghemite, which has a large specific surface area. The specific surface area of the obtained samples varied in the range of 6.1–54.9 m2/g. Arsenic adsorption experiments were carried out using five different types of red muds: industrial Bayer, industrial sintering, and red mud obtained through bauxite alkali fusion at 300, 500, and 700 °C. The red muds obtained by fusing bauxite with caustic alkali at 300 and 500 °C had the highest effectiveness removing arsenic; their As(V) uptake capacity was over 30 mg/g.


Author(s):  
E. Yu. ZHeltouhova ◽  
E. D. Kondrashina

In the course of the work, the technology of obtaining toilet soap with cosmetic properties was improved; samples of soap with the introduction of physiologically functional substances into the composition of the formulation components were experimentally obtained in order to preserve the initial physiologically active properties. The technological process of preparing the basic toilet soap periodically indirect method of neutral fats includes the following stages: caustic saponification of the fat set; grinding soap base; upholding of the soap base; draining the soap base; ennoblement of a soapy glue. Saponification of the main fat raw material is carried out in the soap boiler and can be produced both on the rest of the soap from the previous cooking, and using the pre-refined adhesive residue from the previous brews. Grinding of the soap base is carried out by hot water 80–90 ?, dry table salt or solution of caustic alkali, which are delivered in separate portions at boiling of the mass with a steaming steam, in an amount necessary for mass separation during grinding into the core (toilet base) and saponified adhesive. The sedimentation of the soap base is made after grinding is performed to separate the mass in the grinding process into the core (toilet base) and the sapwood glue. The temperature of the soap mass before settling must be at least 100 °C. The settling time is not less than 24 hours. The preparation of the core is carried out in a soap boiler. Prefabricated soap of toilet soap is heated to a boil with a hot steam. Then produce a high level of sapper adhesive with dry table salt, which is introduced in the amount necessary to separate the mass into a core and a flushing liquor. After each portion of the salt is injected, the soap mass is boiled for 15–20 minutes until completely dissolved and uniformly distributed in the mass. Salting is considered complete if the soap in the cauldron acquires a granular structure and in the sample on the spatula the kernels of the nucleus are clearly visible, between which the flaked lye flows.


2018 ◽  
Vol 16 (1) ◽  
pp. 335-345
Author(s):  
Zhao-Fen Gao ◽  
Bao-Quan Wang ◽  
Jinwei Yin ◽  
Yu-Ping Zeng

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