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The oxidation of hydrocarbons to produce maleic anhydride using a catalyst system comprising a vanadium oxide, a molybdenum oxide or mixtures thereof is well known. More recently, such catalyst systems have included materials in addition to the vanadium andor molybdenum oxides, e.g., phosphorous, silica or titanium, and are discussed in u.s. Pat. No. 4, 113, 745 entitled "catalyst for and method of producing maleic anhydride" to strojny et al, which describes a process for obtaining maleic anhydride wherein a c5 hydrocarbon stream is oxidized with an oxygen-containing gas over a catalyst mixture containing 30 to 60 weight percent vanadium oxide, 5 to 40 weight percent molybdenum oxide and 25 to 60 weight percent titanium oxide on an alpha alumina or alumina silica support having a surface area of less than one square meter per gram. The presence of titanium oxide in selected amounts in the catalyst apparently results in higher maleic anhydride yields and permits slightly lower temperatures during the reaction.

Nited states patent ofilice 3, 285, 958 patented nov. 15, 1966 the invention described herein may be manufactured and used by or for the government for governmental purposes without the payment to me of any royalty thereon. This invention relates to triaminoguanidine (hereinafter referred to as tag) and salts thereof and more particularly concerns unique and improved processes for their preparation. In the past, tag had been prepared by stolle and krauch by reacting dicyandiamide (hereinafter referred to as dcda) and hydrazine hydrate at 40 c. For about 8 hours. The low yield product isolated was identified as the tribenzylidene hydrochloride derivative and data concerned therewith are shown in the table, experiment no. 1. When the reaction temperature was raised to 110 c. (exp. No. 2) and the reaction time decreased to about 5 2 hours, other conditions remaining generally the same, no triaminoguanidine nitrate (hereinafter referred to as tagn) was formed. Tagn may be prepared by the aqueous fusion of calcium cyanamide and hydrazine nitrate. If dcda disproportionates into cyanamide in accordance with the reaction it would appear likely that hydrazine nitrate would react and form tagn as in the aqueous fusion of calcium cyanamide. When dcda was used under similar conditions as the calcium cyanamide fusion method, no tagn was formed as shown in the table, experiment no. 3. Since tag compounds are finding widespread application in vital rocket and artillery components as well as in explosives, des-oxidants, organic intermediates, etc., it would be advantageous if improved processes for their preparation could be developed. It is therefore a broad object of this invention to provide processes for preparing tag compounds.

A process for polymerisation of diethylene glycol bis allyl carbonate field of invention this invention relates to a process for polymerisation of diethylene glycol bis allyl carbonate. The polymerised carbonate may be used for lenses having a low refractive index.

United states patent abstract of the disclosure a method for producing soda ash from natural crude trona ore including the following steps: crushing crude trona ore into granules, calcining the crushed crude trona at an elevated temperature to form sodium carbonate and to remove organic materials, dissolving the calcined trona in liquid recycled from the process and make-up water, clarifying and filtering the resulting solution to remove insolubles, adding carbon dioxide to the resulting solution to precipitate sodium sesquicarbonate crystals therefrom, separating the sodium sesquicarbonate crystals from the liquid from which the crysals have precipitated, recycling the liquid to the dissolution step and calcining the separated sesquicarbonate crystals to produce a soda ash product.

Manufacturing process of hydrazine hydrate 5 j l p w 5 5 a mm 5p 3 wc 1 d m int. Cl. C01c 128 u.s. Cl. 23190 1 claim abstract of the disclosure process for producing hydrazine hydrate by the hydrolysis of a ketazine under atmospheric pressure, which process involves heating a ketazine composition containing ketone and hydrazine hydratein a mol ratio of less than 2.0 and the vapor evolved from this first stage is passed through a first column consisting of multiple stages of a ketazine material in which the ketone to hydrazine hydrate ratio in the liquid becomes larger stage by stage, and whereby the corresponding ketone is produced by means of continual hydrolysis, said ketone being removed by fractional distillation and wherein the hydrazine hydrate is removed from the first stage.

Technical field[0001]the present invention relates to a purifying method which can give highly pure caustic potash (potassium hydroxide), and the present invention provides a method which can give highly pure caustic potash at low cost and in a simple process by removing, for example, sodium and chlorine, as well as heavy metals, such as iron, chromium and nickel, from the caustic potash to be treated.

United states l atent c) 3, 355, 490 process of manufacturing cyclohexylamines frederik h. Van munster, waukegan, ill., assignor to abbott laboratories, chicago, ill., a corporation of illinois no drawing. Filed aug. 19, 1964, ser. No. 390, 719 8 claims. (cl. 260-563) abstract of the disclosure n-alkyl-(or n, n-dialkyl)-cyclohexylamine or methylcyclohexylamine are prepared from phenol, a primary or a secondary alkylamine and hydrogen in the presence of rhodium or palladium as the catalyst. The present invention relates to the manufacture of n-substituted cyclohexylamines; more particularly, it relates to the preparation of n-alkyl-substituted cyclohexylamine from phenol or cresol and an appropriate amine. The products of the present invention have heretofore been made only by rather complicated procedures, mainly procedures involving expensive starting materials or costly process conditions such as high temperatures and high pressures. The alkylated cyclohexylamines of the present invention are useful as fuel oil additives, as rubber accelerators, as catalysts in the preparation of polyurethane foams, as rust inhibitors, or as textile modifiers. They are also useful in the synthesis of more complex organic compounds such as drugs.

United states patent 3, 399, 976 process for producing borax decahydrate crystals alan d. Randolph, gainesville, fla., assignor to american potash & chemical corporation, los angeles, calif., a corporation of delaware continuation-impart of application ser. No. 438, 840, mar. 11, 1965. This application july 24, 1967, ser. Claims. (cl. 23-301) abstract of the disclosure a process for controlling the mean size and size range of borax decahydrate crystals produced from a magma containing solid phase borax and water saturated with borax. The temperature and solids concentration of the magma are controlled to produce two basic crystal size distributions, one having a mean particle size of less than about 45 mesh and the other having a mean particle size of greater than about 45 mesh. Borax crystals of the smaller particle size are crystallized from the magma when the magma is maintained at a temperature of less than 115 f. And a solids concentration of greater than 0.25 gram of solid borax crystals per cubic centimeter of solids-free mother liquor. Borax crystals of the larger particle size are crystallized from the magma when it is maintained at a temperature higher than 115 f. And a solids concentration of less than 0.25 gram per cubic centimeter.

Ited states patent ziffer [541 process for producing sodium gluconate 72 inventor: jack zifier, milvsiaukee, wis. [73] assignee: pabst brewing company, milwaukee, wis. March 4, 1971 1211 appl. No.: 121, 201 [52] us. Cl. .260527 r, 260535 r [5 1] int. Cl .c07e 5906 [58] field of search .260535 [56] references cited foreign patents or applications 1, 130, 431 81958 germany .260535 1451 sept. 26, 1972 primary examiner lorraine a. Weinberger assistant examiner-paul j. Killos attorney-johnston, root, okeeffe, keil, thompson & shurtleff [5 7 abstract 8 claims, no drawings processfor producing sodium olucona're background it is known in the art to prepare a technical grade sodium gluconate from a liquid gluconic acid-gluconatecompo'sition made by a fermentationprocess as described in us. Pat'no. 3, 454, 501 and according to sodium gluconate product is apparently due to.trace impurities, probably carbohydrates, and the heat'treatment which occursin the drying operation. As a consequence, technical grade sodium gluconate is produced which is tan in color rather, than white and while. This does not; impair the effectiveness of the product, .it leaves much to bedesired from the stand, - point of'appearance.

This invention rel temperatures not :belowo" c. 1 completely as a'polymen patented ma 21, 1935 I u 2, 002, 243 7 1 nor aldnnynasolurron pat .wiibifisebtti;hifi garene im bay, staten island, jn., y., assignor to e. .ldu pont. De nemours 8a company, ind, wilmington, del, 1a corporation of delaware f I dr w n 19*; I l f r aqueous formaldehyde; solutions; a aqueous solutions of substantially pure formal-; dehydecontaining not over30 of thealdehyde are stable at temperatures of c. And above, i. Elnoformaldehyde polymer will precipitate from such solutions at thesetemperatures- hence, such a solution, if kept pure fne'ed not be; stabilized if it is tobe stored and transported at aqueous solutions of formal much in excess of 30% by weight of, formaldee hyde, if allowed to stand at temperatures above. 0 c. Will precipitate formaldehyde polyrner, the