EP0029709A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Acrylate production
Assignee: Zeneca Inc
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Filing: 1980-11-20
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Granted: —
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Expires: 2000-11-20
Abstract
Abstract Process for the production of hydroxy alkyl acrylates or hydroxy alkyl methacrylates which comprises adding an alkylene oxide to a solution of acrylic or methacrylic acid, at least .05% by weight of acid of chromium trioxide catalyst and at least 5% by weight based on acid of a solvent for the catalyst.
Inventors
- 👤 Kenneth Helmuth Markiewitz
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 20:44
CPC Classifications
C; C07; C07C; C07C69/00; C07C69/52; C07C69/533; C07C69/54; C07C67/00; C07C67/24; C07C67/26
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
106 words
In a method for the preparation of hydroxy alkyl acrylates or methacrylates by the reaction of an alkylene oxide with acrylic or methacrylic acid in the presence of chromium compound, the improvement which comprises the steps of initially mixing to form a solution said acrylic or methacrylic acid with at least 0.05% based on the weight of the acid of chromium trioxide and from about 5 to 20% by weight of said acid of a solvent and continually adding the alkylene oxide to the solution in a total amount of from about 0.90 to 1.5 moles of alkylene oxide per mole of acrylic or methacrylic acid.
Claim 2
Dependent Claim
106 words
In a method for the preparation of hydroxy alkyl acrylates or methacrylates by the reaction of an alkylene oxide with acrylic or methacrylic acid in the presence of chromium compound, the improvement which comprises the steps of initially mixing to form a solution said acrylic or methacrylic acid with at least 0.05% based on the weight of the acid of chromium trioxide and from about 5 to 20% by weight of said acid of a solvent and continually adding the alkylene oxide to the solution in a total amount of from about 0.90 to 1.5 moles of alkylene oxide per mole of acrylic or methacrylic acid.
Claim 3
Dependent Claim
26 words
A method as claimed in Claim 1 in which there is used 1.05 to 1.5 moles of alkylene oxide per mole of acrylic or methacrylic acid.
Claim 4
Dependent Claim
28 words
A method as claimed in Claim 1 or Claim 2 wherein the catalyst is present in an amount of 0.05 to 5% based on the weight of acid.
Claim 5
Dependent Claim
28 words
A method as claimed in Claim 1 or Claim 2 wherein the catalyst is present in an amount of 0.05 to 2% based on the weight of acid.
Claim 6
Dependent Claim
28 words
A method as claimed in Claim 1 or Claim 2 wherein the catalyst is preesnt in an amount of 0.05 to 0.2% based on the weight of acid.
Claim 7
Independent Claim
19 words
A method as in any one of claims 1 to 5 wherein the solvent is previously obtained reaction product.
Claim 8
Independent Claim
21 words
A method as claimed in any one of Claims 1 to 6 wherein the hydroxy alkyl methacrylate is hydroxy propyl methacrylate.
Claim 9
Independent Claim
40 words
A method as claimed in any one of claims 1 to 7 wherein a temperature range of about 60° to 120°C. is maintained during the reaction for a reaction time within the range of about 1 to 4 2 hours.
Claim 10
Independent Claim
41 words
A method as claimed in any one of claims 1 to 8 wherein methacrylic acid and propylene oxide are reacted and the catalyst is present in a range of about 0.10 to 1.4% based on the weight of the methacrylic acid.
References Cited (Backward Citations)
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