# US 4,395,356 A · Method for removing catalyst residues from solutions of poly-1-butene

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- Number: US 4,395,356 A
- Document ID: US4395356A
- Status: Granted
- Kind: A
- Application number: 06/333,492
- Filed: 1981-12-22
- Granted: 1983-07-26
- Earliest claimed: 1980-11-28
- Assignees: Shell Oil Company
- Inventors: Lynn H. Slaugh; Carl L. Willis
- Web page: https://patentgrep.com/patent/US4395356A

## CPC

- C08F 6/02: Neutralisation of the polymerisation mass, e.g. killing the catalyst (short-stopping C08F2/42 ){also removal of catalyst residues}
- B01D 11/0288: {Applications, solvents}
- Y10S 526/903: Monomer polymerized in presence of transition metal containing catalyst and hydrocarbon additive affecting polymer properties of catalyst activity
- Y10S 526/912: Reaction medium purification
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28)
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

## Abstract

A process for removing catalyst residues from poly-1-butene which is disclosed which comprises contacting an organic phase containing the poly-1-butene dissolved in an inert hydrocarbon solvent with an aqueous solution of an alpha-hydroxysulfonic acid and then separating the poly-1-butene-containing phase from the aqueous phase.

## Claims

### Claim 1

A process for removing catalyst residues from poly-1-butene which comprises contacting an organic phase containing poly-1-butene dissolved in an inert hydrocarbon solvent with an aqueous phase containing an alpha-hydroxysulfonic acid prepared by reacting a carbonyl compound of the general formula R.sub.1 R.sub.2 CO wherein R.sub.1 and R.sub.2 are individually hydrogen or hydrocarbyl of up to about 7 carbon atoms with sulfur dioxide and water and subsequently separating the poly-1-butene-containing organic phase from the aqueous phase.

### Claim 2 (depends on 1)

The process of claim 1 wherein the poly-1-butene is dissolved in an alkane having a carbon number ranging from about 4 to about 12.

### Claim 3 (depends on 2)

The process of claim 2 wherein the alkane has a carbon number ranging from about 6 to about 10.

### Claim 4 (depends on 3)

The process of claim 3 wherein the alkane is hexane, heptane or cyclohexane.

### Claim 5 (depends on 1)

The process of claim 1 wherein the poly-1-butene is dissolved on 1-butene.

### Claim 6 (depends on 1)

The process of claim 1 wherein the poly-1-butene-containing organic phase after separation is additionally subjected to heat and/or vacuum in order to decompose any residual alpha-hydroxymethanesulfonic acid, and thereby driving off the sulfur dioxide.