Abstract:
The present invention relates to a method to manufacture ester oligomer and, more specifically, to a method to manufacture an esterification reaction product with low acidity containing ester oligomer obtained via esterification or trans-esterification; and manufacturing polyester by polymerizing by adding the liquid state of the manufactured esterification reaction product with low acidity.
Abstract:
The present invention relates to a method for continuous polymerization of polyester and, more specifically, to a method for continuous polymerization of polyester and to a polymerization reactor applied thereto, the method comprising: obtaining an ester oligomer by performing esterification or trans-esterification; and continuously injecting the ester oligomer in a liquid polymerization reactor to continuously produce polyester polymers in the liquid polymerization reactor.
Abstract:
본 발명은 반도체 공정 관리 시스템의 프로그램 업-데이트 방법에 관한 것으로서, 더욱 상세하게는 반도체 제조라인 내에서 반도체 공정 진행을 제어하고, 모니터링하는 클라이언트 서버(client server)에서 운영되는 반도체 공정 관리 시스템의 프로그램을 정기적으로 버전 체크하여 업-데이트하는 반도체 공정 관리 시스템의 프로그램 업-데이트 방법에 관한 것이다. 이와 같은 반도체 공정 관리 시스템의 프로그램 업-데이트 방법에 의해 클라이언트 서버는 작업자에 의한 시스템의 다운 없이 신규 프로그램을 다운로드 받으며, 작업자가 업-데이트 작업을 하지 않으므로 작업자의 수동 업무가 줄어드는 효과가 있다. 그리고, 모든 클라이언트 서버가 동일한 시간에 업데이트가 이루어지므로 항상 전체 반도체 라인의 클라이언트 서버들은 모두 동일한 버전의 프로그램에 의해 운영되므로 호스트 서버가 컨트롤 하는 것도 원활해진다. 호스트 서버, 클라이언트 서버
Abstract:
PURPOSE: A program updating method of semiconductor process management system is provided to reduce a manual operation of an operator and to smoothly control a host server managing an overall operation by automatically checking a version downloading, and registering a register by a client server at updating time and by having always data of the same version of an entire line client servers. CONSTITUTION: A process operates a version checking program at a predetermined version checking time with plural client servers(101,102,103...N) connected through a network to a host server(10) storing a main program, and identifies information of the client server(101,102,103...N) version and the host server(10) version. When the client server(101,102,103...N) version and the host version(10) is different to each other, the process terminates the program running on the plural client servers and stores in the plural client server(101,102,103...N) an updated program downloaded existing on the host server. When the downloading is finished, system starts again as adding file starting the program received download to a beginning program. The process starts again the system and registers a system file at a register. The process eliminates the beginning file at the beginning program and then executes the received program downloaded.
Abstract:
The present invention relates to a method for preparing esterification reaction products and a method for preparing polyester using esterification reaction products and more specifically, to a method for preparing esterification reaction products in which the content of dipropylene glycol is reduced, and to a method for preparing polyester using the esterification reaction products, in which generation of impurities such as acrolein, aryl alcohol, and the likes is reduced. [Reference numerals] (AA) End; (BB) Example 1; (CC) Example 2