92975-18-3

Usage

Uses

Chlorosulfates were used to esterify several carboxylic acids.

Upstream product

• 75-09-2 dichloromethane 
• 49715-04-0 chlorosulfuric acid chloromethyl ester 

Downstream Products

• 99591-74-9 methylene methane disulfonate 
• 1264194-63-9 methylene bis(4-methoxybenzenesulfonate) 
• 5342-31-4 bis(benzoyloxy)methane 
• 35131-81-8 bis-(6β-phenylacetamido-penicillanoyloxy)-methane 

Relevant academic research and scientific papers

Method for the Recycling or Disposal of Halocarbons

The present invention relates to a method for recycling and/or disposal of halocarbons, particularly fluorinated alkanes, such as trifluoromethane, by reacting said halocarbons with sulfur trioxide, particularly to form halide sulfonic acids and sulfur dioxide.

Preparation method of methyl bichlorosulfonate

The invention discloses a preparation method of methyl bichlorosulfonate. The methyl bichlorosulfonate is prepared through the catalytic addition reaction of fuming sulphuric acid and dichloromethaneunder the condition that boron tribromide is taken as a catalyst. Compared with the prior art, the preparation method of the methyl bichlorosulfonate has the following advantages: (1) the novel catalyst of boron tribromide is cheap and easy to get, and the production cost is lowered; (2) due to the optimized catalyst and reaction condition, the MBCS (Methyl Bichlorosulfonate) yield is increased, and a byproduct CMCS is also reduced; (3) the use of the hazardous difficult-to-treat material sulfur trioxide is avoided, the operability is strong, and the industrial value is high; and (4) the problem of difficulties in storing and fusing the liquid sulfur trioxide in use is avoided.

Chloromethyl chlorosulfate: A new, catalytic method of preparation and reactions with some nucleophiles

A catalytic method of preparing chloromethyl chlorosulfate (CMCS) was described. The reaction of liquid SO3 with CH2Cl 2 at room temperature led to SO3 insertion into the C-Cl bonds, giving CMCS. The product mixtures consists entirely of CMCS and the product of further sulfation, methylene bis(chlorosulfate) (MBCS). The reaction was shown to be first order in the catalyst and third order in SO3 by measuring initial rates of CMCS formation or total CH2Cl2 consumption. The results show that the reaction between dichloromethane and SO3 at room temperature is accelerated by very low concentrations.

Process for preparing methyl chlorosulfates

A process for preparing methyl chlorosulfates by reacting methylene chloride with sulfur trioxide, stabilizing and distilling the reaction mixture, and recovering at least one methyl chlorosulfate as a distillate is disclosed. Preferably, the reaction produces two methyl chlorosulfates, i.e. chloromethyl chlorosulfate and methylene bis-(chlorosulfate), which are separated and recovered by fractional distillation.