Products for Recycling

Ciba Specialty Chemicals Additives for Polyolefins Products for Recycling  

Processing and long-term thermal stabilization for polyolefins and mixed plastics 

Light and basic stabilization for polyolefins and polyolefin blends RECYCLOBLEND 660  

Suitable for plastic recyclates containing paint or ink residues 

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The Mobil/Badger vapor phase process includes four distillation columns. The first major separation is in a benzene recovery column where unconverted benzene is recovered as an overhead product for recycle to the alkylation and transalkylation reactors. The bottom stream is fed to an EB recovery column where EB product is separated from cumene, the PEB, and other heavy components. The cumene, PEB, and other heavy by-products are further separated in the PEB recovery column. The heavy residue is typically used as fuel in the reactor feed heater. The PEB fraction is recovered in the overhead stream and recycled to the transalkylation reactor where it reacts to form additional EB. A fourth column is used as a stabilizer column to vent any light components and to remove water from the system. 

Enzymatic hydrolysis of polysaccharides (cellulose, starch) or oligosaccharides (maltose, saccharose, lactose) for the synthesis of food products is another class of processes MBR have been applied to. Paolucci-Jeanjean et al [4.56] have recently reported, for example, the production of low molecular weight hydrolysates from the reaction of cassava starch over a-amylase. In this case the UF membrane separates the enzyme and substrate from the reaction products for recycle. Good productivity without noticeable enzyme losses was obtained. Houng et al [4.57] had similar good success with maltose hydrolysis using the same type of MBR,... 

For fine metal ores and, more recently, for iron-bearing waste materials, agglomeration by heat (sintering), a less frequently used size-enlargement technology, is used. All agglomeration methods can be used to manufacture products for recycling and secondary raw materials. 

Objective Encourage the return of waste products for recycling or re-use. 

Design Products for Recycle Adherence to these principles is measured by the recovery percentage of a material in the U.S. municipal recycle stream [165]. 

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