The unwanted fertilizer. (Ammonium Sulphate Production).(Statistical Data...

Nitrogen & Methanol;  July 1, 2002 ;     700+ words ...Ammonium sulphate has suffered a long, slow decline...sometimes overlooked fertilizer. Ammonium sulphate (AS) is one of the oldest fertilizers...20th century meant that synthetic ammonium sulphate could be produced from ammonia...

mascagnite

A Dictionary of Chemistry;      10 words ...mascagnite A mineral form of ammonium sulphate , (NH 4 ) 2 SO 4 .

Sulphur is the key.(ammonium sulphate as fertilizer)

Nitrogen & Methanol;  July 1, 1999 ;     700+ words ...Ammonium sulphate (AS) has suffered a long, slow...some quarters in recent years. Ammonium sulphate is one of the oldest fertilizers...20th century meant that synthetic ammonium sulphate could be produced from ammonia...

ammonium sulphate

A Dictionary of Chemistry;      91 words ...ammonium sulphate A white rhombic solid, (NH 4 ) 2 SO...naturally as the mineral mascagnite. Ammonium sulphate was formerly manufactured from the...dioxide, and ammonia. Vast quantities of ammonium sulphate are used as fertilizers.

CAPROLACTAM PROCESS.

High Performance Plastics;  January 1, 2001 ;     402 words ......to nylon-6, that does not produce ammonium sulphate by-product. The technology combines...that it also yields 1.6-4.0 t of ammonium sulphate for each tonne of caprolactam. This...as a catalyst, and to recover the ammonium sulphate. While caprolactam producers sell...

ICI drops dirty dumping. (Imperial Chemical Industries PLC)

Chemistry and Industry;  July 17, 1989 ;     332 words ......of acidic wastewater - mainly ammonium sulphate, sulphuric acid, water and a...rise to three tonnes of acidic ammonium sulphate waste, but much of this is already recycled to ammonium sulphate for use in phosphoric acid production...

Ravensdown drops prices

The Press;  October 28, 1999 ;     87 words ......Pringle said Urea, DAP, and Granular Ammonium Sulphate priceswill all drop because of further...and the United States,and Granular Ammonium Sulphate from Canada. DAP prices will drop...retail and trade prices. Granular Ammonium Sulphate prices will drop by $36 and Urea...

TRI drops major chemicals

Haznews;  August 1, 1995 ;     177 words ......Release Inventory (TRI), and to delete ammonium sulphate as a separate chemical. All are reported...also determined that releases of ammonium sulphate are more appropriately reported under...result that reported emissions of ammonium sulphate have declined 98% since 1988. Copyright...

Current Situation of Sulphur-Containing Fertilizer in China

China Chemical Reporter;  April 10, 1995 ;     700+ words ......fertilizer commonly used include ammonium sulphate, S content 23%; single superphosphate...urea, S content 10%; urea containing ammonium sulphate, S content 6%; S-containing ammonium...fertilizers, such as single supersulphate, ammonium sulphate, gypsum, potassium sulphate, ...

DSM in AS joint venture. (Nitrogen Industry News: China).(Sinpoec Nanjing...

Nitrogen & Methanol;  November 1, 2002 ;     99 words ......build a joint venture caprolactam and ammonium sulphate plant with the Sinpoec Nanjing Chemical...that SNCIC operates to 140,000 t/a. Ammonium sulphate output will increase from 110,000...sourced from outside the company. The ammonium sulphate is likely to be sold on the domestic...

Vladimir Mackiw and the Sherritt Ammonia Pressure Leach Process.

Canadian Chemical News;  October 1, 2000 ;     700+ words ......from the concentrate in an ammonia-ammonium sulphate system at elevated temperatures under...without the need to precipitate nickel ammonium sulphate. Next, Mackiw and his colleagues...solutions made up from pilot nickel ammonium sulphate, but never occurred in solutions...

The purification of microbial biocatalysts by filtration and ammonium...

Pharmaceutical Technology Europe;  June 1, 2001 ;     700+ words ......and focusses on the development of ammonium sulphate protein precipitation stages. Following...steps in the downstream process use ammonium sulphate protein precipitation and two types...the precipitate. Development of the ammonium sulphate precipitation steps Ammonium ...

Kop that!(Business Weekly)

Evening Gazette (Middlesbrough, England);  April 26, 2005 ;     335 words ......Lambson transfer its glycerine and ammonium sulphate production facilities to Teesside...pharmaceutical, food and beauty industries. An ammonium sulphate facility produces a liquid fertilizer...will continue the operation. The ammonium sulphate plant is planned to be operational...

Get tough on weeds : Knock out dastardly ornamental weeds with an...

Landscape Management;  March 1, 2002 ;     700+ words ......controlling quackgrass by adding ammonium sulphate. Quackgrass is a prevalent weed problem...0.8 lbs/ac), with the addition of ammonium sulphate. Periodic applications at the high...0.56 kg/ha (0.5 lbs/ac) rate and ammonium sulphate, gave effective rhizome control...

Solvent-free process for caprolactam.(ENVIRONMENTAL ISSUES)

High Performance Plastics;  November 1, 2005 ;     400 words ......solvent-free and does not generate ammonium sulphate byproducts, it could offer industry...produces immense quantities of unwanted ammonium sulphate--as much as 1 kg (2.3 pounds) for...caprolactam. In total, some 15 Mt of ammonium sulphate by-product is produced worldwide...