• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 433
  • 189
  • 65
  • 34
  • 34
  • 14
  • 12
  • 8
  • 8
  • 8
  • 8
  • 8
  • 8
  • 8
  • 8
  • Tagged with
  • 997
  • 139
  • 134
  • 111
  • 75
  • 71
  • 70
  • 67
  • 61
  • 59
  • 51
  • 45
  • 44
  • 43
  • 41
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Synthetic ammonia costs in America

Tour, Reuben Simkin, January 1900 (has links)
Thesis (Chemical engineer)--University of Michigan, 1927. / Caption title. "Reprinted from v. 20 of the Transactions of the American institute of chemical engineers."
2

Experimentelle undersógelser over ammoniums fer hold i organismen, dets indvirkning paa denne og ders udskillelsesforhold

Iversen, Poul, January 1918 (has links)
Thesis--Copenhagen. / "Liferaturforteguelse": p. [136]-139.
3

Synthetic ammonia costs in America

Tour, Reuben Simkin, January 1900 (has links)
Thesis (Chemical engineer)--University of Michigan, 1927. / Caption title. "Reprinted from v. 20 of the Transactions of the American institute of chemical engineers."
4

Binary sytems. Ammonia, sodium chloride; ammonia, sodium bromide; ammonia, sodium iodide ...

Lee, Ira Elver, January 1900 (has links)
Thesis (Ph. D.)--Cornell University, 1915.
5

Experimentelle undersógelser over ammoniums fer hold i organismen, dets indvirkning paa denne og ders udskillelsesforhold,

Iversen, Poul, January 1918 (has links)
Thesis--Copenhagen. / "Liferaturforteguelse": p. [136]-139.
6

Optimization of FLOWTRAN models by quadratic approximation programming

Parker, Arthur L., January 1978 (has links)
Thesis--Wisconsin. / Vita. Includes bibliographical references (leaves 120-124).
7

Effects of atmospheric ammonia on swine response /

Stombaugh, Dennis Paul, January 1968 (has links)
Thesis (M.S.)--Ohio State University, 1968. / Includes bibliographical references (leaves 42-43). Available online via OhioLINK's ETD Center
8

Farbreaktionen bei der Hydrolyse von Säureanhydriden

Reichel, Hermann January 1910 (has links)
Thesis (doctoral)--Universität Leipzig, 1910. / Vita. Includes bibliographical references.
9

Mechanisms of ammonia tolerance in the oriental weatherloach, misgurnus anguillicaudatus /

Tsui, Tommy Kuen Nang. January 2005 (has links) (PDF)
Thesis (Ph.D.)--City University of Hong Kong, 2005. / "Submitted to Department of Biology and Chemistry in partial fulfillment of the requirements for the degree of Doctor of Philosophy" Includes bibliographical references (leaves 148-166)
10

The use of amines to minimise corrosion in the overhead system of a crude distillation unit

Alexander, Ben January 2002 (has links)
The objective of the research project was to investigate the use (incorporating the environmental impacts) of ammonia and amines to minimise acidic corrosion in the overhead system of a Crude Distillation Unit without the danger of these additives forming corrosive hydrochloride deposits. It is hoped that the information obtained will enable refiners to select amines or amine mixtures that reduce both acidic and hydrochloride deposit corrosion to a level acceptable in today's refinery. Additonally, a framework has been developed to allow the refiner to select which of these chemicals has the lowest environmental impact in a particular refinery. A Computer Model that accurately predicts the pH profile of the acidic condensate of the overhead condenser system was developed. Although many similar models exist in the literature and in the marketplace, this model incorporates two novel aspects - the raising of the water dew point temperature by hydrochloric acid and the partitioning of amines between the water and hydrocarbon phases. The Knudsen Effusion technique was used to determine previously unknown vapour pressure data for the hydrochlorides of several commercially used amines and to validate existing data for ammonium chloride. This data can be used to predict the temperatures in the Crude Distillation Unit at which hydrochloride deposition occurs. With this information, the refiner should now be able to minimize the danger of hydrochloride salt corrosion in the overhead system of the Crude Distillation Unit. Furthermore, by combining the amine pH profiles from the computer model with their hydrochloride vapour pressure data it was possible to identify two amines (DMIPA and MOP A) that had a superior ability to neutralise the acidic condensate without the danger of hydrochloride deposition. A laboratory scale chamber was designed that accurately reflects the deposition of ammonium chloride and amine hydrochlorides in the overhead system of the Crude Distillation Unit. This Deposition Chamber was used firstly to validate assumptions made with the Knudsen Effusion data and secondly to check whether pure vapour pressure data could accurately predict the actual hydrochloride deposition temperatures in the Crude Distillation Unit. It also showed that the use of pure vapour pressure data to predict amine hydrochloride deposition temperatures in the Crude Distillation Unit is valid for structurally dissimilar amines. However, the observed hydrochloride deposition temperature of a mixture of two structurally similar amines was found to be approximately 5°C higher than the theoretical deposition temperature predicted from the vapour pressure data, indicating that they should not be used together.

Page generated in 0.0411 seconds