Storage of raw materials

Incorporation of fillers, additives, and modifiers via proper mixing equipment 

These processes and associated equipment are discussed below. 

Liquid epoxy resins are stable for long periods at room temperature. Resins that are cut with diluent or solvent should be stored in tight containers to prevent loss of volatiles. Also, certain resins and curing agents (e.g., anhydride curing agents) can be degraded by exposure 

Moderate elevated-temperature storage of epoxy resins to reduce viscosity or prevent resin crystallization has little effect on most resins, even after several months of storage time. Storage at temperatures above 55°C is satisfactory for periods of 2 or 3 days for processing purposes. 

The storage and transfer of raw chemicals requires special considerations relative to the equipment that come into contact with epoxy resins. Carbon steel is generally satisfactory for pipe and tank construction and will not rust beneath the epoxy resin. Rust occuring above the level of the epoxy and accidentally introduced into the resin may be removed by filters. Epoxy coated steel pipe, aluminum or stainless steel pipe, or epoxy fiberglass composite tubing is used to prevent rusting downstream of the filter. 

---

The dry blend can also be extmded and the extmdate chipped to produce pellets of PVC compound which can then be subsequendy reprocessed to produce the final product. This has the benefit of ease of storage of raw materials since all the formulation ingredients are contained bound in the gelled compound. Many producers of flexible PVC only purchase PVC compound, and many companies exist solely to produce PVC compound rather than a tme end product such as sheet, flooring, or pipe. 

Equipment Costs The cost of dehvered equipment forms the basis of most methods of estimating the fixed-capital cost. The equipment required can usually be divided into (1) processing equipment, (2) equipment for handling and storage of raw materials, and (3) finished products handling and storage equipment. 

Steam-heated aluminum castings are used for the melt spinning of nylon and polyester fibers and have been used for storage of raw materials during manufacturing, as well as for storage of acetic acid in cellulose acetate plants. 

More inclusive is Table 3.3.1 -3 which is appropriate at depth into the analysis. The major headings in this table address major hazardous subject areas,. iccideni mitigation, protection and repair. I or example, under the first major heading, "Storage of Raw Materials, Products, Intermediates," listed are confinement measures, release nicclumi.sms (valves), procedures for safe operation and limitations that must be observed for safety. 

Storage of Raw Materials, Products, lotermediates Persoonei Protection ... 

Pressure vessels and tanks may be used for reactions, storage of raw materials, conlaimnenl of chemical inlennediales or products, and pliase separations. Tlie... 

Analyzing the collected existing data, including site characteristics, history of site (including disposal practices, disposal locations, disposed waste condition, waste degradations, storage of raw materials)... 

Packaging and protective barrier waste Receipt and storage of raw materials Shipped to municipal landfill 7500 0a... 

Storage. Some of the largest inventories of hazardous materials tend to be held up in the storage of raw materials and products and intermediate (buffer) storage. 

So I bought the business, he went on. It was simple work, really. The guy had a contract to make medical thermometers for a drug store chain. He made them in this converted workshop. The workshop wasn t very big, maybe about 30 feet by 18 feet, with a door at one end and a big window at the other. There were workbenches round the walls, and water and power, and places for storage of raw materials and for cartons of the product. Pretty primitive, really. But it was a moneymaker. And the longer you worked, the more money you made. ... 

Materials System- This is concerned with the segregation and storage of raw materials, components, and finished products, inventory control, and distribution of finished products. 

Transportation of raw materials to depots and plants, by oil tankers, natural gas pipelines, barges, trains, and trucks, can create hazards. Another set of transportation hazards is posed by chemical intermediates (produced in one plant and transported to another plant for further processing) and industrial wastes. Sometimes, they travel past crowded urban areas, pristine beaches, and harbor tunnels. The hazards of oil spills on beaches by tankers are well known, and so are the instances of ruptures and breaks in oil and natural gas pipelines, which produce fire and pollution hazards. Trains and trucks can overturn in centers of habitation, and can lead to flames and explosions, as well as toxic hazards to the community. Toxic chemicals are barred from being trucked in tunnels under harbors and rivers. The storage of raw material and intermediates at plants or... 

Storage of raw materials, packaging materials, bulk products and finished product is appropriate. 

Most processes involve the storage of raw materials, products, and wastes and the transfer of these items from one area of the plant to another. Proper materials handling and storage ensures that raw materials reach the production process without spills, leaks or other types of losses which could result in waste generation. Similarly, proper materials handling ensures that products and wastes which result from the production process are transferred to off-site locations without additional waste generation. 

The costs for the storage of raw materials, products and intermediates can be significant, namely for large-scale commodities. The storage of toxic and hazard chemicals should be avoided. 

Nichols, L.E. 1979. Packaging and storage of raw materials. In Monograph on Recombination of Milk and Milk Products. Technology and Engineering Aspects. Document 116, pp. 53-55, International Dairy Federation, Bussels. 

Explosives. The munitions industry employs air conditioning to control uniformity in the manufacture and loading of various explosive mixtures, to control drying and moisture content, to minimize static discharges, to reduce the hazards of fire and explosion, to remove and neutralize toxic fumes, to remove and recover dust or solvents from manufacturing or loading processes, and to provide proper atmospheric conditions for the storage of raw materials or finished product (see Explosives). 

Because raw-material delivery carmot be accurately predicated, on account of unforeseen events such as bad weather, strikes, accidents, etc., storage of raw materials is a necessity. Similarly, the demand for products can be unpredictable. Also, internal storage of chemical intermediates may be required to maintain steady operation of a process containing batch operations or to store chemical intermediates temporarily if downstream equipment fails. Production can continue when repairs are completed. 

---