Sieves stainless steel

In this condenser, part of the stripper off-gases are condensed (the heat of condensation is used to generate low pressure steam). The carbamate formed and noncondensed NH and CO2 are put into the reactor bottom and conversion of the carbamate into urea takes place. The reactor is sized to allow enough residence time for the reaction to approach equiUbrium. The heat required for the urea reaction and for heating the solution is suppHed by additional condensation of NH and CO2. The reactor which is lined with 316 L stainless steel, contains sieve trays to provide good contact between the gas and Hquid phases and to prevent back-mixing. The stripper tubes are 25-22-2 stainless steel. Some strippers are still in service after almost 30 years of operation. 

The fines are classified out of the feed and pass through the air classifier into a baghouse, from which they are fed onto sieves, containing 165 p.m—0.124 mm (105—120 mesh) stainless steel wire cloth. Oversi2e mica from the sieves returns to the mill s grinding chamber for further grinding. 

Recovery column diameter 1 m, vessel overall height 20 m, 35 sieve plates, vessel and plates stainless steel, operating pressure 1 bar. 

A plate column diameter 2 m height 25 m, stainless clad vessel, 20 stainless steel sieve plates, operating pressure 5 bar. 

Solvent recovery column plate column, diameter 0.6 m, height 6 m, 10 stainless steel sieve plates, design pressure 2 bar, column material carbon steel. 

Alkylation of benzene with propylene was carried out with the acid zeolites, pelletized, crushed, and sieved at 0.25-0.42 mm diameter. The reaction was performed in an automated high pressure stainless steel reactor, at 3.5 MPa, temperatures ranging from 125 to 200°C, WF1SV from 12 to 18 h"1 referred to the olefin, and benzene to propylene (B/P) molar ratio of 3.5. More details can be found in [7]. 

The sediment samples were allowed to thaw at room temperature and then sieve-washed through a 2 mm stainless steel screen to remove pebbles and extraneous debris. Excess water was decanted and the wet sediment was Soxhlet extracted for several hours with Nanograde isopropyl alcohol. A further extraction with Nanograde benzene was necessary in order to isolate the polycyclic aromatic hydrocarbons. The isopropanol extract was evaporated to dryness on a rotary evaporator at 30-40°C the benzene extract was freed of elemental sulfur by passage through a column of colloidal copper [6]. 

Procedure. Weigh 10 g air-dry soil, sieved to 2 mm (10 mesh) using a stainless steel sieve into a 175-ml square HDPE (e.g. Nalgene) plastic screw-cap... 

The feed gas flow rate was monitored and controlled by mass flow controllers. Product gases were fed through heated stainless steel lines to a sample loop in an automated gas chromatograph. The GC analysis was performed using two isothermal columns (80°C) in series, a Porapak T and a Molecular Sieve 5A column. When necessary, a second GC analysis using a temperature programmed Hayesep R column was used to separate and detect small hydnx arbons (such as ethylene and ethane) and H2O. 

Normal lead styphnate (LS) [Structure (2.10)] was first reported by Von Herze in 1914, although its basic salt, that is, basic LS was prepared by Griess [7] way back in 1874, by the reaction of acidified magnesium styphnate with lead nitrate/acetate in hot aqueous solution. It is precipitated as mono hydrate and consists of reddish-brown rhombic crystals. It is filtered off, washed with water, sieved through a stainless steel sieve and dried. Like other initiatory explosives, it is kept in wet conditions until used. 

Transfer the suspension through 630 micron sieve after mixing for 5 minutes at 18-20 rpm, temperature NMT 25°C, to the stainless steel storage tank. 

Filter the bulk through 630-micron sieve in a clean stainless steel storage tank. 

All materials used were commercial products of highest available quality. Their purity was ascertained by gas chromatography. All material transfers and synthetic manipulations were performed under a nitrogen atmosphere in a stainless steel enclosure. The moisture level was maintained at <20 ppm by recirculating the atmosphere over 3 A Molecular Sieves. 

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