Welcome to LookChem.com Sign In|Join Free

CAS

  • or

70936-97-9

Post Buying Request

70936-97-9 Suppliers

Recommended suppliersmore

  • Product
  • FOB Price
  • Min.Order
  • Supply Ability
  • Supplier
  • Contact Supplier

70936-97-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 70936-97-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,0,9,3 and 6 respectively; the second part has 2 digits, 9 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 70936-97:
(7*7)+(6*0)+(5*9)+(4*3)+(3*6)+(2*9)+(1*7)=149
149 % 10 = 9
So 70936-97-9 is a valid CAS Registry Number.

70936-97-9Relevant articles and documents

Method for preparing isocyanate with low hydrolytic chlorine content by gas phase method

-

Paragraph 0037-0038, (2021/05/22)

The invention relates to a method for preparing isocyanate with low hydrolytic chlorine content by a gas phase method, which comprises the following steps of: carrying out phosgenation reaction on corresponding amine and stoichiometric excess phosgene in a reaction zone in the presence or absence of an inert medium; wherein the reaction conditions are selected such that at least the reaction components amine, isocyanate and phosgene are gaseous under these conditions, and feeding of at least one gas stream comprising amine and at least one gas stream comprising phosgene into the reaction zone, and introducing of a carbon dioxide stream in a quenching zone at the rear end of the reaction zone are carried out, and the molar content of the carbon dioxide stream is less than 60% of the molar weight of the phosgene stream, so that the isocyanate with low hydrolytic chlorine content can be obtained more easily, the product yield is improved, and the investment cost of the device is reduced.

ISOCYANATE PRODUCTION METHOD

-

Paragraph 0419-0428; 0476; 0478, (2020/05/02)

An isocyanate production method according to the present invention is a method in which an isocyanate is produced by subjecting a carbamate to thermal decomposition, and includes: a step of preparing a mixture liquid containing the carbamate, an inactive solvent and a polyisocyanate compound; a step of conducting a thermal decomposition reaction of the carbamate by continuously introducing the mixture liquid into a thermal decomposition reactor; a step of collecting a low-boiling decomposition product by continuously extracting the low-boiling decomposition product in a gaseous state from the reactor, the low-boiling decomposition product having a boiling point lower than the polyisocyanate compound; and a step of collecting a high-boiling component by continuously extracting, from the reactor, a liquid phase component which is not collected in a gaseous state at the step of collecting the low-boiling decomposition product.

Method for preparing IPDI (isophorone diisocyanate)

-

Paragraph 0091; 0097, (2019/06/13)

The invention discloses a method for preparing IPDI (isophorone diisocyanate). The method comprises the following steps: (1) isophorone and hydrogen cyanide are subjected to a reaction in the presenceof a catalyst to obtain isophorone nitrile; (2) isophorone nitrile obtained in step (1), ammonia and hydrogen are subjected to a reaction in the presence of a catalyst to obtain isophorone diamine; (3) isophorone diamine is subjected to a phosgenation reaction to obtain IPDI, wherein the content of impurities containing secondary amine groups in isophorone diamine subjected to the phosgenation reaction in step (3) is smaller than or equal to 0.5wt%, preferably smaller than or equal to 0.3wt%, and more preferably smaller than or equal to 0.1wt%. By means of the method, content of hydrolyzed chlorine in the IPDI product can be effectively reduced, the yellowing resistance of the product is effectively improved, and the harm that downstream products are unqualified due to existence of hydrolyzed chlorine in the product is reduced.

Post a RFQ

Enter 15 to 2000 letters.Word count: 0 letters

Attach files(File Format: Jpeg, Jpg, Gif, Png, PDF, PPT, Zip, Rar,Word or Excel Maximum File Size: 3MB)

1

What can I do for you?
Get Best Price

Get Best Price for 70936-97-9