Batch technology

As a second example, several Hantzsch syntheses using diverse ring-substituted 2-bromoacetophenones and 1-substituted-2-thioureas are given. For these reactions, comparative and better yields were achieved when using a micro-mixing tee chip reactor as compared with conventional laboratory batch technology. The increase in yield amounted to about 10-20% [156, 157]. 

According to a JSR patent Nd-catalysis allows for the polymerization of BD in the presence of carbon black. By this method a BR/carbon black master batch is obtained. The master batch technology eliminates time and energy consuming mixing of carbon black and rubber [340,341]. According to this patent the content of bound rubber (amount of rubber which can be extracted from a carbon black/rubber mixture with an appropriate solvent, e.g. toluene) is increased and vulcanizate properties are improved. 

Up to now, in the area of fine chemicals the oxidation of alkyl aromatic compounds with air has been performed by batch technology. The step to continuous oxidation is the next logical development. Standard space time yields (sty) for batch operation are in the range of 0.05 to 0.1 kg L h . By increasing the... 

In lead optimization using conventional batch technology, irrespective of whether parallel or iterative mode is chosen, validation and optimization of reactions tends to be one of the major rate-limiting steps. Based on the model described in Fig. 14.5, however, it can be seen that if the biological assay was replaced by a chemical assay and the conditions not the reagents are varied, then an auto-optimization could be carried out. Replication of the optimized channel as a parallel bundle could then provide a means of amplifying the amounts of material generated. 

In general terms a man-made fiber polymerization scheme can be classified as either a batch or a continuous process. In a pure batch process the polymerization step is carried out separately from fiber formation in reactors that receive discrete charges of monomer(s). In a continuous polymerization (CP), monomer is fed continually into the reactors, and polymer is continually removed downstream. For some polyamides and polyesters, fiber formation may or may not be an integral part of the CP line. Most modern polymerization schemes are continuous processes, and these are slowly replacing much of the older batch technology. 

Unlike the preceding batch technology, the process described in Figure 1.17 is a continuous... 

In most cases it is only possible to give a definite value to product quality when the product has been crystallized, separated and dried because specifications are only available for isolated products. When MRT is used today, the technology has to be changed so that the workup is carried out using batch technology. To obtain the complete benefit of M RT these missing unit operations must be developed. 

Life Cycle Assessment of Microreaction Technology Versus Batch Technology - a Case Study... 

A total of 800 g/day of product was synthesized and the advantages compared to batch technology were evident on a 500 g scale and are shown in Table 11.2. 

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