Compounding process tasks

General Overview of the Compounding Process Tasks, Selected Applications, and Process Zones... 

The process of designing a compounding process has always to be seen in tight relation with the design of the extruder it is to be executed on. Both the initial design of such a process and its optimization, consist of the foilwing tasks ... 

To achieve optimum material quality, the equipment for compounding fillers into a polymer must be capable of performing some of the following process tasks ... 

All three tasks are generally too complicated to be solved from first principles. They are, therefore, tackled by making use of prior information, and of information that has been condensed into knowledge. The amount of information that has to be processed is often quite large. At present, more than 41 million different compounds are known all have a series of properties, physical, chemical, or biological all can be made in many different ways, by a wide range of reactions all can be characterized by a host of spectra. This immense amount of information can be processed only by electronic means, by the power of the computer. 

Ring perception and equivalence of atoms and bonds are also very important tasks in for processing chemical compounds. 

Patent databases are therefore integrated databases because facts, text, tables, graphics, and structures are combined. In patents that include chemical aspects (mostly synthesis or processing), the chemical compounds are often represented by Markush structures (see Chapter 2, Section 2.7.1). These generic structures cover many compound families in a very compact maimer. A Markush structure has a core structure diagram with specific atoms and with variable parts (R-groups), which are defined in a text caption. The retrieval of chemical compounds from Markush structures is a complicated task that is not yet solved completely satisfactorily. 

H. Long, ed., Task Compounding and Processing ofRjcbber, ACS Rubber Division, Washington, D.C., 1985. An intermediate-level textbook focusing on basic manufacturing processes for mbber articles. 

Preparation of cyclopropylacetylene (37) Cyclopropylacetylene (37) was a known compound and its synthetic method from vinylcyclopropane via dibromination had been reported [27] when we started our investigation. Large scale preparation of 37 was not an easy task. Actually, many chemists in our department worked on establishing the process for such a simple compound as 37 at the peak of the project. 

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