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EP0199997A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Process for preparing diaryl-pentaerythritol

Assignee: Adeka Corp
•
Filing: 1986-03-27
•
Granted: —
•
Expires: 2006-03-27
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Abstract

Abstract A process for preparing diaryl pentaerythritol diphosphites by reaction of phosphorous trichloride pentaerythritol and an alkyl phenol having the formula wherein: R, is selected from the group consisting of tertiary alkyl having from about four to about eight carbon atoms and cyclohexyl; and R 2 and R 3 are each selected from the group consisting of hydrogen and alkyl having from one to about eight carbon atoms; in the presence of a catalyst selected from the group consisting of amines; quaternary ammonium salts; amides of carboxylic acids, amides of oxygen acids of phosphorus; ureas; thioureas; and quaternary phosphonium salts.

Inventors

  • 👤 Kenji Tajima
  • 👤 Masayuki Takahashi
  • 👤 Kazunori Nishikawa
  • 👤 Takashi Takeuchi

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-06 15:10
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/547; C07F9/6564; C07F9/6571; C07F9/6574; C07F9/65746

Claims Analysis

Total Claims: 11
Claim 1
Independent Claim 101 words
A process for preparing hindered diaryl pentaerythritol diphosphites, which comprises reacting phosphorous trichloride, pentaerythritol, and an alkyl phenol having the formula: wherein: R l is selected from the group consisting of tertiary alkyl having from about four to about eight carbon atoms and cyclohexyl; and R 2 and R 3 are each selected from the group consisting of hydrogen and alkyl having from one to about eight carbon atoms; in the presence of a catalyst selected from the group consisting of amines; quaternary ammonium salts; amides of carboxylic acids; amides of oxygen acids of phosphorus; ureas; thioureas; and quaternary phosphonium salts.
Claim 2
Dependent Claim 101 words
A process for preparing hindered diaryl pentaerythritol diphosphites, which comprises reacting phosphorous trichloride, pentaerythritol, and an alkyl phenol having the formula: wherein: R l is selected from the group consisting of tertiary alkyl having from about four to about eight carbon atoms and cyclohexyl; and R 2 and R 3 are each selected from the group consisting of hydrogen and alkyl having from one to about eight carbon atoms; in the presence of a catalyst selected from the group consisting of amines; quaternary ammonium salts; amides of carboxylic acids; amides of oxygen acids of phosphorus; ureas; thioureas; and quaternary phosphonium salts.
Claim 3
Dependent Claim 16 words
A process according to claim 1 in which R l is t-butyl or t-amyl or t-octyl.
Claim 4
Dependent Claim 16 words
A process according to claim 1 in which R 1 and R 2 are each t-butyl.
Claim 5
Dependent Claim 16 words
A process according to claim 1 in which R 1 and R 2 are each t-octyl.
Claim 6
Dependent Claim 12 words
A process according to claim 1 in which R 1 is cyclohexyl.
Claim 7
Dependent Claim 12 words
A process according to claim 1 in which R 2 is methyl.
Claim 8
Dependent Claim 22 words
A process according to claim 1 in which R 1 is t-butyl or t-amyl and R 2 or R 3 is methyl.
Claim 9
Dependent Claim 28 words
A process according to one or more of the claims 1 - 7 in which the reaction temperature is within the range from about 60 to about 200°C.
Claim 10
Dependent Claim 21 words
A process according to one or more of the claims 1 - 8 carried out in the presence of a solvent.
Claim 11
Dependent Claim 21 words
A process according to one or more of the claims 1 - 9 carried out in the presence of a co-catalyst.

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