Claims
- 1. A process for obtaining an isomer having conjugated double bonds of (A) a lower polymer of butadiene or (B) a lower copolymer of butadiene with at least one monomer selected from the group consisting of a conjugated diolefin other than butadiene and a vinyl-substituted aromatic compound, each of (A) and (B) being liquid or semi-solid at room temperature, having a molecular weight of from 300 to 10,000 and having non-conjugated double bonds therein, which comprises contacting a charge consisting essentially of said lower polymer (A) or copolymer (B) at from 0.degree. to 200.degree. C. in the presence of a catalyst comprising (1) an organic alkali metal compound and (2) a diamine compound represented by the formula ##STR17## wherein n is an integer of 2 or 3, and each of R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 represents a hydrogen atom or an organic compound residual group having from 1 to 20 carbon atoms and any two members of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 may be bonded together to form a cyclic structure,
- thereby forming a reaction product containing said isomer, and
- recovering from said reaction product a product consisting essentially of said isomer.
- 2. A process of claim 1 wherein the lower copolymer (B) of butadiene is a lower copolymer of butadiene with a comonomer selected from the group consisting of isoprene, 2,3-dimethylbutadiene, piperylene, styrene, .alpha.-methylstyrene, vinyl toluene and divinylbenzene, the comonomer content thereof being up to 50 mole percent.
- 3. The process of claim 1, wherein the reaction is carried out in an aliphatic hydrocarbon solvent or an aromatic hydrocarbon solvent.
- 4. The process of claim 1, wherein the organic alkali metal compound (1) has the formula R--Me wherein Me is lithium, sodium or potassium, and R is selected from the group consisting of an alkyl, alkenyl, cycloalkyl, aryl and alkaryl group having from 1 to 20 carbon atoms.
- 5. The process of claim 1, wherein the organic alkali metal compound (1) is a complex of naphthalene or anthracene with sodium or potassium.
- 6. The process of claim 1, wherein the diamine compound is a diamine selected from the group consisting of ethylene diamine, tetramethylethylene diamine, tetraethylethylene diamine, propylene diamine, dimethylpropylene diamine and tetramethylpropylene diamine.
- 7. The process of claim 1, wherein the diamine compound (2) is a cyclic diamine selected from piperidine or triethyl diamine.
- 8. The process of claim 1, wherein the organic alkali metal compound (1) is used in an amount of from 1 millimole to 1 mole per 100 grams of the butadiene polymer.
- 9. The process of claim 1, wherein the organic alkali metal compound (1) is used in an amount of from 10 to 100 millimoles per 100 grams of the butadiene polymer.
- 10. The process of claim 1, wherein the diamine compound (2) is used in an amount of from 0.1 to 100 mole equivalents of the organic alkali metal compound (1).
- 11. The process of claim 1, wherein the diamine compound (2) is used in an amount of from 0.5 to 10 mole equivalents of the organic alkali metal compound (1).
- 12. The process of claim 1, wherein said isomer is free of said alkali metal.
- 13. The process of claim 1, wherein the catalyst is deactivated and removed before removing said isomer from the reaction product.
Priority Claims (2)
Number |
Date |
Country |
Kind |
47-85076 |
Aug 1972 |
JA |
|
47-96613 |
Sep 1972 |
JA |
|
Parent Case Info
This is a continuation of application Ser. No. 391,204, filed Aug. 24, 1973, now abandoned.
US Referenced Citations (6)
Continuations (1)
|
Number |
Date |
Country |
Parent |
391204 |
Aug 1973 |
|