Essays on Solvent

Aims and Objectives of the Experiment

The aim of this experiment is to study the separation of an extract of a non-prescription analgesic tablet containing acetylsalicylic acid (aspirin) and caffeine. The separation is achieved through a well-known process called liquid chromatography. The quantities of the aforementioned substances also need to be determined in the experiment (“High Performance Liquid Chromatography,” n.d.).

Theory and Principles

Chromatography is a technique used for the separation of the components, or solutes, in a mixture. The separation is based on the amounts of the relevant solute in the moving, or fluid, stream. There are two phases in chromatography, the mobile phase, and the stationary ...

Introduction

Carbon Capture and Sequestration (CCS) is a group of technologies that received recognition in 21 century. CCS process consists of collection and concentration of CO2 emitted from combustion of fossil fuels with further transportation to special storage locations. The reason for storing carbon dioxide away is related Greenhouse effect and its influence on global warming process. The main goal of carbon capture technologies is to stabilize the levels of greenhouse gas in the atmosphere. It is expected that implementation of CCS technologies will make it possible to reduce the total emission of CO2 up to 54% (to 450 ppmv). ( ...

Abstract

Carbon capture is an essential approach for reducing greenhouse gas emissions. Different plants utilize various technologies in reducing carbon dioxide emission. Some of the conventional techniques employed include oxy-fuel, pre, and post-combustion carbon capture. These approaches have a high potential for capturing carbon dioxide. However, their massive initial and implementation costs have been a challenge to plants globally. Additionally, most of them are yet to experience large scale applications. Therefore, it is essential for research and development activities to be conducted. This can ensure a reduction in the cost of production. The carbon capture technologies differ in costs. This ...

Abstract

Application of the nanofiltration (NF) and ultrafiltration (UF) processes is applied in the handling of water that is produced raw. The application has been investigated in the current day through various studies (Wang 14). The experiment of the processes of both nanofiltration and ultrafiltration is conducted in the laboratory unit which is operated in a pattern of cross flow (Ashaghi, Ebrahimi, & Czermak, 46). The study that was conducted in Oilfield of North Sea using the process of membranes of ultrafiltration (UF) and microfiltration (MF) indicated that the content of hydrocarbon decreased from 50 mg/l to 2 mg/l which recorded ...

Introduction

Coal is a very cheap and abundant provision of energ. In fact, it is the most abundant fuel in the United States; U.S. has the highest coal reserve in the world, with up to 25% of the known world coal present in America and being mined in 26 out of the U.S. 50 states (fe.doe.gov, 2013). However, this abundant energy is seldom used because it is a very dirty energy. According to Hong & Slatick (1994), up to 204.3 pounds of carbon dioxide per million Btu is emitted when coal having 78% carbon content is completely burned to attain a ...

Abstract

Rose hip (Rosa Canina), often cultivated for its fruits, are orange-red oval berries, which seeds (including shells) are used in supporting the treatment of bladder infection, diarrhea, diabetes, and related conditions often in the form of a 3-g powdered seeds capsule. Its seed oil contains ascorbic acid, carotenoids, polyphenols, and GOPO, which reduces inflammation and pain, and lowers inflammatory markers. Extraction methods used include solvent extraction, supercritical fluid extraction, and subcritical fluid extraction. Licensed rose hip supplement products include Hyben Vital and LitoZin/i-flex. Hyben Vital dosage is twice daily for 3 to 4 months to reduce osteoarthritic pain and ...

Abstract

The concentration of carbon dioxide has been abnormally increasing over the years. In the year 2016, its concentration exceeded the limitations, and has been considered as a dangerous situation. As a response to the increasing carbon dioxide content in the Earth’s atmosphere, different processes are being suggested in order to lower the concentration. Carbon Capture and Storage, or CCS, is one of these processes. Generally, there are three different phases of this process: the pre-combustion, the oxyfuel, and the post-combustion. These three phases have different processes in which the carbon dioxide content is being separated from the other ...

Thin Layer Chromatography of Amino Acids

Introduction The technique used for this experiment was thin layer chromatography (TLC). TLC is used to separate components of a mixture (Clark, 2016). The purpose of this experiment was to identify an unknown amino acid. The components will have different affinities to the stationary and mobile phases. The various components will travel at different rates based on their affinity to either the mobile or stationary phase (Clark). A polar stationary phase is used in TLC experiments and the mobile phase can be a combination of solvents or just one solvent (psu.edu, n.d.). TLC can also be used to monitor ...

Overview

Polyvinylidene fluoride is one of the polymers that are used as membrane material. This is because of its outstanding properties. Besides its comparatively high amount of fluorine, the polymer also has a high level of crystallinity. The result of these properties are exhibited in the performance of the Polyvinylidene fluoride polymer. For instance, the chemical stability of Polyvinylidene fluoride in chlorinated solvents and environments that are highly caustic and acidic is very high. Another property of the polymer is its hydrophobicity. This means that it is not compatible with water. This would create challenges if the polymer were to ...

Click Chemistry describes the biocompatible reactions that are high yielding, that are very simple to perform, have wide scope, that need no chromatography to remove their byproducts and that can be conducted in easily removable solvents. The synthesis of first triazole was reported by Arthur Michael in 1893. In the 20th century, Huisgen discovered the catalyst of copper, 1,3-dipolar cycloaddition which required the temperature of 100 degree Celsius. This reaction of copper is a highly versatile reaction which does not require any specific reaction conditions and can easily be performed with various solvents, wide temperature range and pH, ...

Introduction

Reduction reactions are very important in chemistry as they are effective processes for synthesizing new compounds from existing ones. In organic chemistry, a compound is said to be reduced if it acquires new hydrogen. There are diverse reagents for carrying our reduction reactions. Two of these are sodium borohydride (NaBH4) and lithium aluminum hydride (LiAlH4) - the latter is a more powerful reducing agent compared to the former. In this experiment, NaBH4 was used to reduce p-Nitrobenzaldehyde to form p-Nitrobenzyl alcohol. NaBH4was used over LiAlH4 in this experiment, because LiAlH4 would also reduce the nitro group of the aldehyde.

Experimental:

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Electrophilic Aromatic Substitution to yield 4-Bromoacetanilide

Introduction Halogenation is a common process in organic synthesis. It is used in industrial and research synthesis as halogenated compounds are used for numerous widely used goods, including plastics. The lab aimed to perform monohalogenation of acetanilide. The reaction is specific since it is performed without catalyst. The typical halogenation is realized in presence of Lewis acid. Halogens molecules are electrophilic, and do not actively react. In presence of Lewis acid, the interaction is rather active.2 The lab used catalyst-free halogenation. The acetanilide molecule contains the acylated amine. As a result, the electronic density is shifted towards the amine ...

Internal analysis of Hudson’s Bay Company

Introduction The internal analysis of a firm enables the understanding of the internal factors that has contributed to the position that the firm is currently in. It involves the analysis of the resources of the firm and the attributes such as inbound logistics, operations, marketing, human resources management, development of technology that adds value to the organisation. The core competency analysis enables the understanding of the expertise, skills and abilities it has to maintain a competitive position in the industry. Internal analysis also enables the finding of the key success factors that are contributing to the competitive advantage of ...

Definition of Coatings

Coating is the process whereby one material is used to continuously cover another surface. According to Dewo et al. (2015), coating is a surface modification approach that involves the addition of a new material onto the surface of a substance or element that is at risk of corrosion.

Formula: Rusting of Iron.

iron + oxygen + water ==> hydrated iron(III) oxide (RUST) 4Fe(s) + 3O2(g) + xH2O(l) ==> 2Fe2O3.xH2O(s)

Different Types of Coatings

The process of coating utilizes multiple films of coatings as primers and top layers. The purpose of each layer is particular; however, the layers often interact with one another (Özçam et ...

Importance of Risk Capital to Bank of America

Bank of America maintains a portion of its capital as a buffer to cover for potential losses that are likely to arise from risky investments that are undertaken by the company. The amount of risk capital that the bank maintains is defined by the capital adequacy policies within the bank and the financial sector within the industry. As a corporate organization, Bank of America strives to deliver for its shareholders and improve their overall value in the company (Bank of America Corporation, 2016). They achieve this not only through the reliance on its operating income, but also investment income ...

Lignin Chemistry

Lignin History Lignin is a plant-derived biopolymer with several applications. It is considered an effective alternative to chemically synthesized plastics that pose serious environmental problems during manufacture and disposal. Lignin is often obtained as a byproduct in paper and pulp manufacture. Lignin has to be dissolved to obtain cellulose from wood. In 1838, Anselme Payen discovered that wood contained cellulose, and oxidizable coatings (later called lignin) that bind the cellulose together (McCarthy and Islam, 2000). This coating material could be removed from wood after acid treatment and washing with an aqueous alkali solution (McCarthy and Islam, 2000). Later, several ...

Algae are a diverse group of organisms that are mainly autotrophs. Autotrophs are organisms that mainly produce complex organic compounds by using simple inorganic molecules and light or in other instances by chemical reactions. Algae can be broadly classified into two main groups which are unicellular or multicellular. Seaweeds form the largest and most complex marine type of algae (Olanrewaju, Wan Nik, & Kader, 2013). It should, however, be noted that algae can further be classified in many different ways. Below is an illustration of some of these classification representations. Green algae are classified into the Plantae kingdom and are, ...

Abstract- Literature 1

Edible oil refinement is one of the major problems faced by the developing countries across the world as edible oil effluents are a major source of environmental pollution. Owing to this, it is essential to ensure that the effluents are treated prior to its disposal. The composition, characteristics and quantity of the waste water generated depends on the operating conditions and processes followed and can vary from different organizations in the same industry. An investigative method comprising of an in-depth study of unit operations, monitoring, measurement and analysis of parameters affecting environment, and performance evaluation of utilities and pollution ...

Abstract

In this experiment, two calorimeters were designed and assembled. One was made using Styrofoam cups and another one using glass and foil. The calorimeters were studied for their performance in keeping the heat of the system. They were studied by measuring the heat loss of hot water over time. The heat lost in each calorimeter over 30 minutes was calculated. The calorimeter made of glass worked better and less heat was lost in it. The assembled calorimeters were used to find out the heat of reaction between NaOH and HCl per one mole of water. This value was found ...

Introduction

There are environmental chemical processes which require light to react. These processes are called photochemical reactions. Photochemical reaction is commonly initiated due to the absorption of solar energy or light. When molecules absorb energy in the form of light, the atoms are converted in a transient excited state (Larson & Weber, 1994). This transition state or excited has completely different physical and chemical properties with the initial state of the molecule. The excited states also have more tendencies to react since they are considered stronger acids and stronger reductants that the initial state of the molecule. The excited state of ...

The Souk Al-Manakh was a classic financial bubble that comprised of investors from around the oil-rich Persian Gulf, and it exploded after confidence in the system was affected. In August 1982, Investors’ checks were reported to bounce and the stock market exchange buckled within a month. The Kuwaiti Ministry of Finance demanded the clearance of all postdated checks by Banks to speed the close down of the stock exchange. The Kuwaiti government conveyed a clearinghouse company that tried to solve disputes and other plights of the investors and brokers (Al-Deera Holding). The arbitration panel was expected to address all ...

Question 1: Separation of mixtures

This is a method of separation of two immiscible solvent phases. It is the best method for the separation of a mixture of Cyclohexanone and Acetone (miscible)

Cyclohexanone is insoluble in water while Acetone is miscible with water. A mixture of the two compounds forms two distinct layers in water. Distillation cannot be used because the two compounds are highly flammable.

In this method of separation, water is added to the mixture. Acetone completely mixes with water while cyclohexanone does not. A funnel is then used to separate the two.

(Note: the colouration is ...