The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 28, 1986
Filed:
Oct. 31, 1984
Gregory E Schmidt, Naperville, IL (US);
Linus K Leung, Naperville, IL (US);
Lawrence J Beck, Bolingbrook, IL (US);
David S Chang, Cincinnati, OH (US);
Standard Oil Company (Indiana), Chicago, IL (US);
Abstract
The method is particularly adapted for controlling the molecular weight of a product output from a polybutene reactor. The method includes the steps of: deriving from the operating parameter of a polybutene reactor system a formula which correlates molecular weight as determined by product viscosity or other parameters of the product output with operating variables such as temperature of the reactor and concentration of isobutylene in the reactor, which concentration can be controlled by the amount of catalyst, e.g., aluminum chloride, being fed into the reactor; monitoring (a) the temperature of the reactor, (b) the concentration of isobutylene in the reactor, (c) the flow of coolant supplied to the reactor for controlling the temperature thereof and (d) the feed rate of catalyst into the reactor; calculating with said algorithm the approximate molecular weight of the product output; determining if the desired product molecular weight is higher or lower than the calculated molecular weight; and, if higher or lower, altering, through use of the formula, the temperature and/or the concentration of isobutylene in the reactor to obtain the desired product molecular weight. Also the method can include the step of adding moisture to the feed or the reactor for lowering the molecular weight of the polybutene product output. The apparatus includes a reactor, a computer and various sensing, monitoring and control devices for carrying out the steps of the method.