66034-17-1

Basic information

• Product Name: DIPHOSPHORIC ACID COMPD. WITH-PIPERAZINE (1:1)
• Synonyms: DIPHOSPHORIC ACID COMPD. WITH-PIPERAZINE (1:1)
• CAS NO: 66034-17-1
• Molecular Formula: C₄H₁₀N₂*H₄O₇P₂
• Molecular Weight: 264.110682
• Mol File: 66034-17-1.mol

Chemical Properties

• Appearance: /
• Density: 1.71 g/cm3
• Vapor Pressure: 0Pa at 49℃
• Water Solubility: 12.24g/L at 20℃
• CAS DataBase Reference: DIPHOSPHORIC ACID COMPD. WITH-PIPERAZINE (1:1)(CAS DataBase Reference)
• NIST Chemistry Reference: DIPHOSPHORIC ACID COMPD. WITH-PIPERAZINE (1:1)(66034-17-1)
• EPA Substance Registry System: DIPHOSPHORIC ACID COMPD. WITH-PIPERAZINE (1:1)(66034-17-1)

Safety Data

• Hazardous Substances Data: 66034-17-1(Hazardous Substances Data)

Usage

Flammability and Explosibility

Notclassified

Synthetic route

piperazine diphosphate (1951-97-9, 14538-56-8, 52978-33-3, 74592-75-9) → piperazine pyrophosphate (66034-17-1)

Conditions	Yield
With boron phosphate In iP2028 at 210 - 230℃; for 2h; Product distribution / selectivity;	98%
With boron phosphate at 210 - 230℃; for 2h; Temperature; Reagent/catalyst; Dean-Stark;	98%
With phosphoric acid In iP2028; water at 210 - 230℃; for 2h; Product distribution / selectivity; Dean-Stark trap;	97%

piperazine (110-85-0) → piperazine pyrophosphate (66034-17-1)

Conditions	Yield
With hydrogenchloride; sodium pyrophosphate In water at 10 - 20℃; for 3h; Product distribution / selectivity;	46%

piperazine diphosphate (1951-97-9, 14538-56-8, 52978-33-3, 74592-75-9) + 2,4,6-triamino-1,3,5-triazinium orthophosphate (20208-95-1) → melamine pyrophosphate + piperazine pyrophosphate (66034-17-1)

Conditions	Yield
at 230 - 270℃; Product distribution / selectivity;

piperazine hydrogen phosphate (14538-56-8) → piperazine pyrophosphate (66034-17-1)

Conditions	Yield
With phosphoric acid In 5,5-dimethyl-1,3-cyclohexadiene at 150 - 300℃;
With ammonium dihydrogen phosphate In paraffin oil at 210℃; for 1h; Temperature;

piperazine (110-85-0) + sodium pyrophosphate (124-43-6) → piperazine pyrophosphate (66034-17-1)

Conditions	Yield
With hydrogenchloride In water at 10 - 20℃; for 3h;	0.23 mol

Upstream product

• 14538-56-8 piperazine hydrogen phosphate 
• 110-85-0 piperazine 
• 124-43-6 sodium pyrophosphate 
• 1951-97-9 piperazine diphosphate 
• 20208-95-1 2,4,6-triamino-1,3,5-triazinium orthophosphate 

Relevant articles and documents

Thermal properties and combustion behaviors of flame-retarded glass fiber-reinforced polyamide 6 with piperazine pyrophosphate and aluminum hypophosphite

Flame-retardant glass fiber-reinforced PA6 (GFPA6) composites were prepared by incorporating the mixture of piperazine pyrophosphate (PAPP) and aluminum hypophosphite (AHP) into GFPA6. From the results of UL-94 test, limiting oxygen index (LOI) and microscale combustion calorimetry (MCC) tests, the as-obtained composites exhibited significantly enhanced flame retardancy including higher LOI values, better UL94 rating (V-0 for 18.0?mass% PAPP/AHP mixture), and decreased peak heat release rate and total heat release. And PA6-4 with a 4/1 mass ratio of PAPP to AHP reached the highest LOI value. The influence of PAPP/AHP on the decomposition pathway of GFPA6 was discussed based on TG and TG-FTIR analysis. The interaction between PAPP/AHP and GFPA6 altered the decomposition pathway of GFPA6 resulting in the formation of compact char layer, high thermal stability within high-temperature region, and weak intensities of a variety of pyrolysis gas products. Meanwhile, the thermomechanical property data revealed the storage modulus of samples were increased with increasing PAPP/AHP content, whereas the glass transition temperatures were reduced gradually. Moreover, the results of scanning electron microscope illustrated that the introduction of PAPP/AHP mixture can promote the formation of compact char layer and change the surface element composition of the char.

Microwave-assisted synthetic method of pyrophosphate piperazine

The invention relates to a microwave-assisted synthetic method of pyrophosphate piperazine. The specific method comprises the steps of diphosphate piperazine synthesis by phosphoric acid and piperazine in the water, and then the diphosphate piperazine is placed under microwave-assisted heating for dehydration in the vacuum state, to achieve pyrophosphate piperazine synthesis. The invention directly uses microwave to heat from the internal diphosphate piperazine molecule by adopting microwave-assisted heating method, simultaneous heating and warming from internal and external of the materials could be achieved no need of any heat conduction process, the heating speed is fast and even, conducive to implementation of dehydraton reaction and to get pyrophosphate piperazine; compared to the traditional heating method, its energy consumption only requires a fraction or several tenths of the traditional heating method to achieve the heating purpose of the same effect, which greatly reduces the costs and improves economic benefit. In addition, weight loss temperature for the products acquired is significantly improved, and the product heat stability is greatly improved compared to the products under the current technology. This method is featured with less pollution, low energy consumption and good product heat stability.

Preparation method of pyrophosphate piperazine

The invention discloses a preparation method of pyrophosphate piperazine. The preparation method comprises the following steps: mixing ammonium dihydrogen phosphate and piperazine in an aqueous solution according to a mole ratio of 2:1, heating to remove ammonia, and dewatering for condensation to obtain the pyrophosphate piperazine. According to the preparation method, the shortcomings that conventional liquid phosphoric acid serving as a phosphorous source is difficult to transport and store are overcome; a reaction system is a weak-alkaline environment, so that erosion of the phosphoric acid serving as the phosphorous source to equipment is avoided; ammonia released during reaction can be used as protection atmosphere of the reaction system, and the whiteness value of a product meets the market requirement. Compared with a phosphoric acid-piperazine method, the preparation method has the advantage of saving the raw material cost by 10 to 15 percent.

High purity pyrophosphorate piperazinecarboxylic and flame retardant synthetic resin composition

PROBLEM TO BE SOLVED: To provide high purity piperazine pyrophosphate giving a flame-retardant composition exhibiting excellent flame retardance, and to provide a method for economically producing the piperazine pyrophosphate. SOLUTION: There are provided piperazine pyrophosphate represented by chemical formula (I) and having a sodium content of 10 ppm or less and a production method for piperazine pyrophosphate, obtaining the piperazine pyrophosphate by dehydration condensation of piperazine diphosphate. COPYRIGHT: (C)2011,JPOandINPIT

HIGH-PURITY PIPERAZINE PYROPHOSPHATE AND METHOD FOR PRODUCING SAME

The present invention provides piperazine pyrophosphate represented by chemical formula (I) which has a sodium content of 10 ppm or lower and a process of producing the same. The piperazine pyrophosphate has high purity and provides a flame retardant composition exhibiting excellent flame retardancy. The process includes dehydration condensation of piperazine diphosphate and is able to produce the piperazine pyrophosphate at low cost.