88-46-0Relevant articles and documents
C10H17NO5S.1/20H2O compound
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Paragraph 0016; 0035; 0037; 0040; 0042; 0045; 0047, (2020/01/25)
The invention discloses a C10H17NO5S.1/20H2O compound and a preparation method thereof. The compound is measured by using a powder X-ray diffraction measurement method, and shows characteristic diffraction peaks represented by a diffraction angle of 2theta +/- 0.2 degrees at the places of 13.4 degrees, 17.2 degrees, 20.5 degrees, 21.4 degrees, 23.7 degrees, 24.5 degrees, 26.9 degrees, 28.0 degreesand 34.0 degrees. The C10H17NO5S.1/20H2O compound prepared by the preparation method has the advantages of good thermal stability, high purity, and weak hygroscopicity, has a simple process, a high yield and strong repeatability, and is suitable for industrial production.
Cornforth and Corey-Suggs reagents as efficient catalysts for sulfonation of aromatic and heteroaromatic compounds using NaHSO3 under solvent free and microwave conditions
Fatima, Touheeth,Duguta, Govardhan,Purugula, Venkanna,Yelike, Hemanth Sriram,Kamatala, Chinna Rajanna
, p. 1001 - 1006 (2020/07/27)
Cornforth and Corey-Suggs reagents Pyridinium Dichromate (PDC) and Pyridinium Chlorochromate (PCC) were explored as efficient catalysts for sulfonation of aromatic and heteroaromatic compounds using NaHSO3 in aqueous acetonitrile medium at room temperature within 1–4 h, while microwave assisted reactions took place within 1–4 min under solvent-free conditions. These observations indicate significant rate accelerations in microwave assisted reactions. which were explained due to the bulk activation of molecules induced by insitu generated high temperatures and pressures when microwaves are transmitted through reaction medium.
Hydroxybenzene disulphonic acid as well as calcium salt and preparation method thereof
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Paragraph 0030; 0031; 0032; 0034; 0035; 0036; 0037-0062, (2019/05/08)
A preparation method of hydroxybenzene disulphonic acid comprises steps as follows: hydroquinone and water-containing sulphuric acid are subjected to a reaction to produce a liquid containing hydroxybenzene sulphonic acid, the liquid containing hydroxybenzene sulphonic acid is subjected to a reaction with fuming sulphuric acid, and hydroxybenzene disulphonic acid is produced. A preparation methodof calcium hydroxybenzene disulphonate comprises steps as follows: a liquid containing hydroxybenzene sulphonic acid is produced from hydroquinone and sulphuric acid and is subjected to a reaction with fuming sulphuric acid, a liquid containing hydroxybenzene disulphonic acid is produced and subjected to a reaction with calcium carbonate, and calcium hydroxybenzene disulphonate is produced. The preparation method of hydroxybenzene disulphonic acid, calcium hydroxybenzene disulphonate and the preparation method of calcium hydroxybenzene disulphonate have the advantage that large-scale synthesisof hydroxybenzene disulphonic acid and calcium hydroxybenzene disulphonate is expected to be realized with a certain technology.