Patents Represented by Attorney S. N. Rice

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  • Production of 2-methylbutanal
    Patent number: 4605781
    Abstract: A continuous process for hydroformylating butene-2 so as to produce 2-methylbutanal in the presence of an halogen-free rhodium complex catalyst of the formula RhH.sub.m (CO).sub.n L.sub.p, wherein "L" is a trialkyl (including cycloalkyl) phosphine ligand having a cone angle within the range of 159 to 171 degrees and wherein the frequency of the A.sub.1 carbonyl mode of the Ni(CO).sub.3 L in dichloromethane is within the range of 2056.1 to 2061.1 cm.sup.-1, there being no substantial excess of free phosphorous ligand.
    Type: Grant
    Filed: September 3, 1985
    Date of Patent: August 12, 1986
    Assignee: Celanese Corporation
    Inventor: Kwoliang D. Tau
  • Recovery of anhydrous acids
    Patent number: 4230887
    Abstract: C.sub.2 -C.sub.6 monocarboxylic and dicarboxylic acids are scrubbed from gas phase mixtures of such acids and water by gas absorption techniques utilizing a liquid solvent comprising a polyoxyalkylene glycol or a monoalkyl or dialkyl ether thereof. The solvent enriched with the acid is subjected to distillation to recover a substantially anhydrous acid product.
    Type: Grant
    Filed: February 16, 1978
    Date of Patent: October 28, 1980
    Assignee: Celanese Corporation
    Inventors: William T. Mitchell, Phillip S. Snyder