Tessenderlo Kerley, Inc.

Tessenderlo Group Nv

Tessenderio Kerley, Inc.

Harry Charles Kominski

Michael Massoud Hojjatie

Constance Lynn Frank Lockhart

Mark P Clarkson

Jeroen Van Cauwenbergh

Alexandros Dimitriadis

Nicholas S Shult

Adam T Goldsmith

Constance Lynn Lockhart

Anatoly Pustilnik

Michael Massoud Hajjatie

Mark Daniel Aspengren

Rajendra Ghimire

Scott Waite

An aqueous composition comprises at least one oxidizable sulfur-based compound. A concentrated extract of the aqueous composition includes a gas chromatography/mass spectrometry-detectable amount of contaminating refinery hydrocarbons but the aqueous composition is free of refinery odor when stored for at least 24 hours at room temperature and 60% relative humidity. The aqueous compositions are prepared from a gas stream obtained from a petroleum refinery process, a coke oven, or the like, containing at least about 4 mol %, more specifically about 15 mol %, of hydrogen sulfide (HS) and/or sulfur dioxide (SO) and/or ammonia (NH), and at least about 0.1 mol % of contaminating refinery hydrocarbons. The aqueous compositions are suitable for use in fertilizers, mining and industrial applications.

Products prepared from waste gas streams containing HS, SO, and/or NH

The invention relates to a process for preparing potassium thiosulfate, potassium sulfite or potassium bisulfite comprising the following steps:

Sulfur dioxide scrubbing system and process for producing potassium products

An efficient process for preparation of potassium thiosulfate (KSO) is described. Potassium hydroxide (KOH) and elemental sulfur (S) are converted to potassium polysulfide, which is subsequently oxidized. The process allows using specifically designed process conditions such as mole ratios of potassium hydroxide to sulfur, and temperature, to obtain an optimized formulation of desired polysulfide, and a specifically designed set of conditions such as temperature, pressure, rate and duration of the oxidant during the oxidation conditions, to obtain a relatively high concentration of soluble potassium thiosulfate product with high purity, with relatively low amounts of byproducts. The manufacturing process can either be a batch process or a continuous process utilizing Continuous Stirred Tank Reactors (CSTR). The CSTR process is dependent on several design parameters, including pressure, and temperature optimization to avoid product instability. The resulting potassium thiosulfate is a beneficial fertilizer with high potassium content as a 50% liquid source of potassium.

Oxidation process for producing potassium thiosulfate

The present invention is directed to the conversion of gas streams comprising ammonia, hydrogen sulfide, and water in the form of liquids or gases that are generated by petroleum refineries and coke ovens to beneficiary agriculture products, by forming ammonium sulfide and then converting the ammonium sulfide, using sulfuric acid, to pure ammonium sulfate.

Process for conversion of waste fluid streams from chemical processing plants to beneficiary agriculture products

An efficient process to produce calcium thiosulfate (CaSO) from lime, sulfur and oxygen is described. By selecting appropriate process conditions such as mole ratios of lime to sulfur, temperature and pressure of the reaction process and the oxidation conditions, including rate and duration, the concentration of byproducts in the resulting suspension can be reduced to about 2% by weight or less. The solid particulate dispersion in the suspension tends to form a slimy solid suspension that is hard to filter if not treated properly. The suspension then can be acidified and treated with a flocculent. This agglomerates the solids into a floc that filters with ease. The resulting calcium thiosulfate is a clear liquid with concentrations achievable up to 29%.

Process for preparing calcium thiosulfate solution

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Phoenix, AZ, United States of America

Harry Charles Kominski