摘要:
A process for preparing 7-hydroxy-1,2-naphthoquinone-2-diazide-4-sulfonic acid or salts thereof, of the general formula Z ##STR1## is disclosed in which X=hydrogen, a metal or an ammonium group, preferably an alkali metal or alkaline earth metal, especially sodium or potassium and the ammonium group.The compounds can be used as much or as intermediates or starting materials for the production of light-sensitive compounds and radiation-sensitive mixtures and materials.
摘要:
A petroleum sulfonate is prepared by (a) separately sulfonating each of two or more different petroleum fractions boiling substantially above 700.degree. F. by contact with sulfur trioxide under reaction conditions wherein the ratio of milliliters of sulfur trioxide to grams of aromatic components is adjusted so as to produce from each separate fraction a reaction product capable of producing upon neutralization a sulfonate having a sulfonate requirement in microemulsion below about 20 grams per 100 milliliters of microemulsion; (b) separately neutralizing the sulfonated fractions; and (c) blending the hydrocarbon sulfonates produced from two or more of the fractions in proportions sufficient to yield a product petroleum sulfonate blend useful for enhanced oil recovery.In one embodiment four different petroleum fractions are separately sulfonated using different ratios of sulfur trioxide to aromatic content for each fraction and the sulfonated fractions are blended in a weight ratio between 0:1:1:0 and 1:10:10:1 to yield a sulfonate blend useful for enhanced oil recovery.
摘要:
5-Fluorotoluene-2,4-disulphochloride is prepared by chlorosulphonation of 3-fluorotoluene by first reacting the 3-fluorotoluene with chlorosulfuric acid and then with an inorganic acid chloride at temperatures up to 130.degree. C. until the evolution of gas is complete, and then heating the reaction mixture at temperatures of up to 200.degree. C. and, after the completion of the gas evolution, reacting the product at a lower temperature with further inorganic acid chloride, or reacting the 3-fluorotoluene with powerful sulphonating agents at an elevated temperature, if appropriate in the presence of inert solvents and/or diluents, to give the corresponding disulphonic acid and then treating the disulphonic acid with inorganic acid chlorides.
摘要:
Dyestuff intermediates of the formula ##STR1## wherein R.sub.1 represents hydrogen, an alkyl radical of 1 to 8 carbon atoms or a phenyl radical, R.sub.2 represents hydrogen or an acyl radical and Z represents hydrogen or a sulfo group, and the use thereof for the manufacture of azo dyes of the formula ##STR2## wherein D represents the radical of a coupling component, R.sub.1 represents hydrogen, an alkyl radical of 1 to 8 carbon atoms or a phenyl radical, and R.sub.2 represents hydrogen or an acyl radical, or of azo dyes of the formula ##STR3## wherein K is the radical of a coupling component, Z represents hydrogen or the sulfo group, and R.sub.2 represents hydrogen or an acyl radical.
摘要:
This invention is directed to the preparation of .alpha.-sulfofatty acid esters. More particularly, this invention is directed to a process for the simplified preparation of light-colored, wash-active esters of .alpha.-sulfofatty acids with monovalent C.sub.1 to C.sub.8 alcohols or their salts from fats and oils of vegetable and/or animal origin comprising re-esterification with the monovalent alcohols or saponification and esterification with the monovalent alcohols, separation of the fatty acid ester formed, hydrogenation of the fatty acid ester, sulfonation, and bleaching, wherein a fatty acid ester fraction from which accompanying fatty acid glycerides have been removed to the extent of about 1 percent by weight or less, based upon the weight of the material to be sulfonated, is introduced into the sulfonation stage.
摘要:
There is disclosed a process for isolating 2-naphthylamine-3,6,8-trisulfonic acid in the form of the alkali or ammonium salt from the sulfonation mixture resulting from the sulfonation of the corresponding naphthylaminemonosulfonic or -disulfonic acid in oleum, which process comprises starting from a sulfonation mixture which contains the naphthylaminetrisulfonic acid in the form of the monopotassium or monoammonium salt, charging said mixture into water or dilute sulfuric acid such that the concentration of the sulfuric acid in the dilute solution or suspension of the sulfonation mixture is 30 to 77% by weight, simultaneously allowing the temperature to rise to 90.degree. to 125.degree. C., subsequently slowly cooling said solution or suspension to a temperature below 40.degree. C., during said cooling adding at least 0.1% by weight, based on naphthylaminetrisulfonic acid, of a dispersant, and isolating the precipitated monopotassium or monoammonium salt of 2-naphthylamine-3,6,8-trisulfonic acid.The naphthylaminetrisulfonic acid isolated in this manner in the form of the monopotassium or monoammonium salt from the sulfonation mixture can be used direct for the manufacture of textile dyes.
摘要:
The title compounds are obtained by reacting compounds corresponding to the following formula:R.sub.1 --CH.dbd.CH--CO.sub.2 R.sub.2wherein R.sub.1 represents hydrogen or a methyl group and R.sub.2 represents a primary or secondary C.sub.1 to C.sub.4 alkyl group, with from 0.6 to 1.6 mol. equivalents of SO.sub.3 and, optionally, with from 0.1 to 10 mol. equivalents of an alkylating agent at temperatures in the range from -10.degree. to +25.degree. C., subsequently heating the resulting reaction mixture for 0.5 to 6 hours to 70.degree.-200.degree. C. and then working it up by distillation.
摘要翻译:标题化合物通过使对应于下式的化合物R1-CH = CH-CO2R2反应获得,其中R 1表示氢或甲基,R 2表示伯或仲C1至C4烷基,具有0.6至1.6mol。 SO 3的当量,和任选的0.1至10mol。 在-10℃〜+ 25℃的温度范围内加入烷基化剂,随后将得到的反应混合物加热0.5〜6小时至70〜-200℃,然后蒸馏除去。
摘要:
Aromatic aminosulphonic acids which have a reduced content of discoloring by-products are obtained when aromatic amines are reacted with a sulphonating agent in a reaction medium at least some of which consists of tetramethylene sulphone.
摘要:
Aminoarylsulphonic acids which have a relatively high purity and a relatively low content of aminoaryldisulphonic acids can be obtained, if they are prepared, from the corresponding arylammonium hydrogen sulphates, by an improved version of the so-called baking process, wherein the reaction is carried out under pressure at a temperature of at least 140.degree. C. and, at least partially, in the presence of water.
摘要:
Alkylbenzene is sulfonated in a thin film type sulfonation process by adding 2 through 20 parts by weight, based on 100 parts by weight of said alkylbenzene, of alkylbenzene sulfonic acids having alkyl groups of 1 through 20 carbon atoms and/or benzene sulfonic acids to the alkylbenzene prior to the contact thereof with diluted gaseous sulfur trioxide. The addition of alkylbenzene sulfonic acids and/or benzenesulfonic acid effectively prevents the formation of adherent deposits on the surface of a reaction wall.