Recycling process with

Recycle process with 16 commercial instal- 6,10,12 oxidation of all sulfur lations on boiler flue species to S02, fol- gas 7 on Claus tall loved 1 y absorption in gas sodium sulfite solution. 

W. L. Luyben, Design and control of gas-phase reactor /recycle processes with reversible exothermic reactions, Ind. Eng. Chem. Research 39, 1529 (2000). 

Luyben, M.L., B.D. Tyreus, W.L. Luyben, Analysis of control structures for reaction/ separation/recycle processes with second-order reactions, Ind. Eng. Chem. Res., 35, 758 (1996)... 

Fig. 2.2-2. Flow sheet for urea manufacture by a solution recycling process with a high pressure depressurization step. [Taken from Fromm, D. and Lutow, D., Modern Processes in the Heavy Chemicals Industry Urea , Chemie in unsererZeit 13, 78-81 (1979).J...

Instead of stripping with carbon dioxide, ammonia can be used (Snam Progetti process). The stripping processes are energetically somewhat more favorable than the recycling processes with high pressure decomposers. 

There are various possible approaches for multiphase operation of homogeneous catalysis, to improve their usability and recycle processes with organic/organic, organic/aqueous, or fluorous solvent pairs (solvent combinations), non-aqueous ionic solvents, supercritical fluids, and systems with soluble polymers. Figure 2.2 reports a general scheme of the possibilities for homogeneous catalysis. 

Fig. 1. Process flowsheet for the recycle process with optimal design.

Figure 27.3 Schematic cooled first catalyst bed recycle process with 660 K feed gas and 700 K recycle gas. The calculation method is described in Appendix Y.

A. Recycle process with repeated processiiig of the entire unreacted raw material )... 

THEORY OF RECYCLING PROCESSES WITH UNRESTRICTED COMPOSITION OF REACTOR... 

THEORY OF RECYCLE PROCESSES WITH UNRESTRICTED RATIO OF THE CHARGE COMPONENTS... 

In this study, (o- and a,o)-carboxylic add-functional PLA were synthesized using a chemical recycling process with reagents from renewable resources. The chemical reQrcling process involves a transesterificafion reaction between commerdal PLA and monomers containing hydroxyl groups [9]. The functionalized PLA was nmtralized with metal acetates of various valencies (Na lT, K, Ca, TsP, Y ). This proach produced PLA-based telechelic ionomers. The effect of ion concentration, metal cation valency and the location of the ioiuc moieties on the thermal and mechanical properties of the PLA ionomer are discussed in this paper. 

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