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US 5,326,855 AGranted
Process for the manufacture of elastomers in particulate form
OwnerHenry Kahninventor
Life of this patent
Estimating the term…
Abstract
A process and plant are disclosed for the manufacture of particulate or liquid elastomeric polymers suitable for the manufacture of a wide variety of commercial elastomers, substantially in the absence of water for purifying and particulating the elastomer.
Claims12
A process for the manufacture of rubber, consisting of:
- A. feeding catalyst, a set of purified monomers taken from the following table and diluents to a reaction system
- ______________________________________ Rubber Monomer Monomer ______________________________________ Ethylene-Propylene-Diene Ethylene Ethylidene Norbornene propylene Epichlorohydrin Epichlorohydrin Ethylene oxide Butyl Isobutylene Isoprene ______________________________________
- with a diluent selected from C.sub.3, C.sub.4 and C.sub.5 hydrocarbons and C.sub.1 chlorinated hydrocarbons or a mixture of these;
- B. reacting the set of monomers, diluents and catalysts in the reactor system to form a particulate rubber product set out in said table;
- C. receiving the product in a purification system
- D. purifying the product in the purification system from the remaining reaction components by settling the product in fresh diluent;
- E. separating the product from the diluent by flash evaporating at a pressure in the range of 1-10 psig the diluent from the product in the absence of water and steam;
- and
- F. finish drying the product in a dryer;
- whereby the group consisting of ethylene-propylene-diene rubber, butyl rubber and epichlorohydrin rubber are all produced by substantially the same equipment.
7 more elements
A process for the manufacture of rubber, comprising:
- A. feeding substantially only a set of monomers and diluents taken from the following table and catalysts to a reaction system
- __________________________________________________________________________ Rubber Monomer Monomer Purified Diluent __________________________________________________________________________ Ethylene-Propylene- Ethylene Ethylidene Norbornene, Propylene Diene propylene Epichlorohydrin Epichlorohydrin Ethylene oxide Isobutane Butyl Isobutylene Isoprene Methylchloride;
- __________________________________________________________________________
- B. reacting the set of monomers, diluents set out in said table and catalysts in the reactor system to form a particulate rubber product;
- C. receiving the product of the reaction in a purification system;
- D. purifying the rubber product in the purification system from the remaining reaction components by settling the rubber product into fresh diluent;
- E. separating the rubber product from the fresh diluent by flash evaporating at a pressure in the range of 1-10 psig the diluent from the rubber product in the absence of water and steam followed by separation of the rubber product from the diluent vapor in a flash chamber;
- and
- F. finish drying the rubber product in a dryer;
- whereby the group consisting of ethylene-propylene-diene rubber, butyl rubber and epichlorohydrin rubber are all produced by substantially the same equipment.
7 more elements
Dependencies are inferred from the claim text.