Described is a process for producing unique reaction products from DMT process residue. In the process of this invention DMT process residue is reacted with an excess of dipropylene glycol to give normally liquid, aromatic polyester polyols which are compatible with Freon 11 blowing agent and with glycerol and hence have outstanding utility in the production of blown polyurethane and polyisocyanurate-polyurethane foams.

Reaction products of DMT process residue and dipropylene glycol

PHTHALIC ACID DIESTER PREPARATION WITH WASTE STREAM PURIFICATION AND RECYCLE Abstract of the Disclosure A continuous process for the preparation in at least one esterification reactor of phthalate diesters utilizing phthalic acid or anhydride and a stoichiometric excess of at least one saturated aliphatic alcohol con-taining about 4 to about 10 carbon atoms comprises (a) reaction of phthalic acid or anhydride with said alcohol in a reactor zone, (b) purification of the diester in a puri-fication zone in which the reaction product is neutralized with an alkali metal hydroxide, i.e., sodium hydroxide, to separate the diester and the unreacted phthalic acid or anhydride together with said saturated alcohol utilized in the reaction, said reaction product is separated into an organic phase and an aqueous waste phase. The organic phase is washed with water, steam stripped, treated with activated charcoal and filtered to purify the diester product desired, (c) the aqueous phase containing monoester is separated from said organic phase in step (b) is purified by filtration to remove solid impurities, carbon treated to remove color bodies, and acidified and extracted with the same alcohol used in the esterification to obtain an organic phase which can be recycled to the reaction zone of the process without causing discoloration of the desired diester product of the process. In the monoester purification process, acidifica-tion is accomplished utilizing a strong organic acid, i.e., sulfuric acid, prior thereto or simultaneously with ex-traction utilizing the same alcohol used in the esterifica-tion process. Purification of the aqueous waste streams produced in the process can be accomplished using activated charcoal to remove organic wastes and precipitation of inorganic salts to remove inorganic impurities produced in the process.

Phthalic acid diester preparation with waste stream purification and recycle

The invention relates to transparent softening agents containing: (a) ester quaternaries, which are obtained by reacting alkanolamines with a mixture consisting of fatty acids and of dicarboxylic acids, whereby the resulting esters are optionally alkoxylated and subsequently quaternized in a known manner, and containing; (b) auxiliary agents selected from the group formed by: (b1) fatty acid amidoamines and/or quaternization products thereof; (b2) betaines; (b3) nonionic surfactants; (b4) polyols and/or derivatives thereof; (b5) alcohols and/or; (b6) hydrotropes.

Transparent softening agents

The invention relates to an emulsion containing an aqueous phase dispersed in an oily phase using a mixed ester of isostearic acid and succinic acid with glycerol, and at least 10% by weight of polyol relative to the total weight of the emulsion. This emulsion is intended in particular for the cosmetic and/or dermatological treatment of hands.

Water-in-oil emulsion containing polyols and its use in cosmetology

A diaryl carbonate with a high degree of purity is produced at a high yield by (A) subjecting (a) a diaryl oxalate and a phenol compound or (b) an alkylaryl oxalate to transesterification reaction in one or two stages in the presence of a catalyst to prepare a diaryl oxalate, while removing a by-product from the reaction system; (B) collecting the diaryl oxalate from the resultant reaction product mixture of the step (A); (C) subjecting the diaryl oxalate to a decarbonylation reaction, preferably in the presence of a phosphorous compound-containing catalyst, to convert the diaryl oxalate to a corresponding diaryl carbonate, while removing a reaction by-product comprising carbon monoxide from the reaction system; and (D) collecting the diaryl carbonate from the reaction product mixture of the step (C).

Process for producing a diaryl carbonate

Process for production of dipropyleneglycol dibenzoate isomer mixture of the formulas: ##STR1## A crude methyl benzoate containing at least 80 wt.% methylbenzoate, which is a by-product of production of dimethylterephthalate by catalytic oxidation of p-xylene and/or methyl-p-toluate and esterification of the resulting acids with methanol, is contacted with dipropylene glycol commercial isomer mixture in the presence of a catalyst for a transesterification to produce said benzoate. The catalyst is an aluminum alkoxide or an aluminum silicon alkoxide containing the group Al O Si. The product is obtained in good yield, has good color, and is useful as a plasticizer for PVC.

Process for the manufacture of light colored dipropyleneglycol dibenzoate

Surface active, liquid, hydroxyl-containing mixed esters which are condensation products of: (a) 1 mole of triethanolamine, glycerine, trimethylolpropane or pentaerythritol, (b) 1 to 2 moles of a saturated, branched, aliphatic or cycloaliphatic carboxylic acid of 16 to 26 C atoms or mixtures thereof, and (c) 0.1 to 0.9 moles, preferably 0.1 to 0.7 moles, of an aliphatic straight-chain or branched dicarboxylic acid of 3 to 10 C atoms, or mixtures thereof.

Surface active, liquid ester mixtures containing hydroxyl, and a method of preparing same

A surfactant compsn. comprises a mixt. of a hydroxyesters which are condensn. prods. of (a) 1 mol. of triethanolamine, glycerol, trimethylolpropane or pentaerythritol or a mixt. of these with (b) 1-2 mols. of a satd. 16-26C aliphatic or cycloaliphatic carboxylic acid or their mixtx. and (c) 0.1-0.9 mol., pref. 0.1-0.7 mol. of a 3-10C aliphatic dicarboxylic acid or a mixt. of these. The prods. are used as emulsifying agents for prepg. water in oil emulsions and find application in the prepn. of fibres or lubricants and in cosmetic and pharmaceutical applicns. The compsns. are easily prepd. and economic. Avoiding the use of unsatd. acids frequently used in prods. of this nature, avoids the disagreeable smell and tendency to oxidise of these prods.

Liquid surfactant hydroxy ester mixture - specified polyols reacted with aliphatic acid then with aliphatic acid

Process for the preparation of pure aryl esters of di- and polycarboxylic acids

A process for the preparation of pure, colorless diphenyl terephthalate which comprises heating a dialkyl terephthalate with phenyl acetate in the presence of activated carbon to temperatures above 150 DEG C. in an inert atmosphere, then adding a transesterification catalyst, such as a titanic acid ester, thereto, removing the alkyl acetate formed in the reaction and introducing the hot carbon-containing crude ester into a relatively high boiling aromatic hydrocarbon, such as xylene, also in an inert atmosphere, and crystallizing the product after removing the activated carbon through filtration. Optionally, fresh adsorbent may be added along with the aromatic hydrocarbon prior to crystallization.

Gustav Renckhoff

Papers

Process for the manufacture of light colored dipropyleneglycol dibenzoate

Surface active, liquid ester mixtures containing hydroxyl, and a method of preparing same

Liquid surfactant hydroxy ester mixture - specified polyols reacted with aliphatic acid then with aliphatic acid

Process for the preparation of pure aryl esters of di- and polycarboxylic acids

Process for the preparation of diphenyl terephthalate