Search for dissertations about: "sulfuric-acid"

Showing result 1 - 5 of 30 swedish dissertations containing the word sulfuric-acid.

2. 1. Superabsorbent Polymers from the Cell Wall of Zygomycetes Fungi

   Author : Akram Zamani; Högskolan i Borås; []
   Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; chitosan; cell wall; chitin; polyphosphates; dilute sulfuric acid; zygomycetes fungi;

   Abstract : The present thesis presents new renewable, antimicrobial and biodegradable superabsorbent polymers (SAPs), produced from the cell wall of zygomycetes fungi. The cell wall was characterized and chitosan, being one of the most important ingredients, was extracted, purified, and converted to SAP for use in disposable personal care products designed for absorption of different body fluids. READ MORE

4. 2. Nitration of Oxo-pyramidines and Oxo-imidazoles

   Author : Abraham Langlet; Christina Moberg; Jan Bakke; KTH; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; explosives; gem-Dinitro compounds; Dinitromethane; Nitroform; Organic chemistry; Organisk kemi;

   Abstract : This thesis is mainly focused on the reactions of oxo-pyrimidines and oxo-imidazoles with nitric acid in sulfuric acid and properties of the gem-dinitro products formed in this process. Low temperature nitrations of 2-methylimidazoles produced – in addition to the known 2-methyl-5(4)-nitroimidazole – 2-(dinitromethylene)-5,5-dinitro-4-imidazolidinone and parabanic acid. READ MORE

5. 3. Recovery of Rare Earth Elements from spent Nickel-Metal Hydride Batteries from Hybrid Electric Vehicles

   Author : Kivanc Korkmaz; Kerstin Forsberg; Åke C. Rasmuson; Gisele Azimi; KTH; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Rare earth elements; hybrid electric vehicles; recycle; nickel; cobalt; precipitation; anti-solvent crystallization; selective roasting; Sällsynta jordartsmetaller; hybridelektriska fordon; återvinning; nickel; kobolt; utfällning; förträngningskristallisation; selektiv rostning; Chemical Engineering; Kemiteknik;

   Abstract : Rare earth elements (REE) are a group of elements that are of critical importance in numerous technological applications, including “green technologies” such as wind turbines and hybrid car batteries. When the criticality of applications is considered, problems in supply has brought the option of effective secondary resource utilization into consideration. READ MORE

6. 4. Recovery of copper and zinc in ashes from municipal solid waste combustion

   Author : Jinfeng Tang; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Cyanex 923; MSWI waste; LIX860-I; acidic leaching; waste treatment.; copper; solvent extraction; zinc;

   Abstract : The amount of municipal solid waste incineration (MSWI) fly ash has increased in many parts of the world in recent years. Ashes from municipal solid waste incineration (MSWI) may be a cumbersome waste to handle since containing significant amounts of leachable hazardous metal species and must be landfilled in special sites at high costs. READ MORE

7. 5. Recalcitrance of wood to biochemical conversion : feedstock properties, pretreatment, saccharification, and fermentability

   Author : Zhao Wang; Leif Jönsson; Brett Pletschke; Umeå universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Recalcitrance; Pretreatment; Enzymatic saccharification; Ionic liquid; Steam explosion; Enzyme inhibition; Non-productive binding; Microbial inhibitors;

   Abstract : Lignocellulose is an inexpensive and abundant renewable resource that can be used to produce advanced biofuels, green chemicals, and other bio-based products. Pretreatment and efficient enzymatic saccharification are essential features of bioconversion of lignocellulosic biomass. READ MORE