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pentafluoroethane( R-125) using the raw materials of carbon

dichloride and hydrogen fluoride

 

 

 

 

1. Product Introduction

    Product Name: pentafluoroethane

    English Name: pentafluoroethane

    Molecular Formula: CF3CHF2

    Formula Weight:120.02

    Physicochemical Property: It belongs to HFC cryogen, it is colorless and odorless nonflammable gas. Because R-125 doesn’t have chlorine and harmless to the atmosphere, it is a perfect ODS substitute which is being wildly used. HFC125 is a stable chemical compound in normal temperature, it is compatible with copper, iron, aluminium and other metals, but not compatible with alkali metal, alkali earth metal, AlZnBe powder. When meeting naked light or high temperature, it will decompose poisonous gas HF, carbonyl fluoride etc.HFC125 is a low poisonous material,toxicity is low.

    Usage: R-125 can be wildly used in foaming agent, propulsive agent, cryogen, fire extinguishing agent, especially for ternary mixed-refrigerant of heat pump and air condition is being successfully used and extended. As cryogen, it is a important part of mixed refrigerant, mainly used in air condition, industrial and commercial refrigeration, water chilling unit etc. . It is used for compounding R404A, R407C, R410A and R507 and replacing R-22, R-12. R-125 also can be used in atomizing propulsive agent, electric insulation gas, foaming agent of polyolefin and Polyurethanes. As cryogen, it can replace Halon-1211 and Halon-1301.

    Market Capacity: Currently, the requirement of R-125 in domestic China is according to the increasing demand of air condition exportation. We export all kinds of air condition products about 20 million sets per year, the cryogen demanded quantity is about 26,000 tons and increasing year by year. EU, Japan, America and Southeast Asia are the main air condition exportation area in our country. According to the requirement from America, EU and Japan, the air conditions which are exported to their countries are normally filling with R407C, R410A. Calculated by every air condition need 1.3 kgs cryogen, it needs more than 20,000 tons green cryogen. According to proportioning of R407C and R410A mixed refrigerant, producing 26,000tons mixed refrigerant at least need R-125 more than 10,000 tons. Till the end of June 2011, the R-125 capacity in domestic is about 55,000 tons per year. But after the new equipment achieve the design capacity, the capacity is about 80,000 tons per year. Domestic selling and production is basically balanced. Because the product quality in China is the same as abroad and the cost is cheaper than abroad, R-125 exportation market has great potential.

 

2. Technology and Process principle

   1. The Technical Principle

     Tetrachloroethylene (PCE) and hydrogen fluoride (AHF) synthetize HFC-125 mainly reaction as following:

              CCl2= CCl2 + 3HF→ CHCl2CF3 + 2HCl  ┄ ┄ ┄ ┄ ┄ ┄ 1

              CCl2= CCl2 + 2HF→ CHCl2CClF2 + HCl ┄ ┄ ┄ ┄ ┄ ┄ 2

              CHCl2CF3 + 2HF→ CHCl2CClF2 + HCl  ┄ ┄ ┄ ┄ ┄ ┄ 3

              CHCl2CClF2 + 2HF→ CHFClCF3 + 2HCl ┄ ┄ ┄ ┄ ┄ ┄ 4

              CHFClCF3 + HF→ CHF2CF3 + HCl   ┄ ┄ ┄ ┄ ┄ ┄ ┄ 5

     The main response equation:CCl2= CCl2+5HF→ CHF2CF3+4HCl

     The side reaction( need to avoid in production) as following:

              CHCl2CF3 → CF3CH2Cl + C2F3Cl3  ┄ ┄ ┄ ┄ ┄ 6

              CF3CH2Cl + HF→ CH2FCF3 + HCl  ┄ ┄ ┄ ┄ ┄ 7

              C2F3Cl3 + 2HF→ CClF2CF3 + 2HCl  ┄ ┄ ┄ ┄ ┄ 8

 

    2.Process block diagram

 钱柜111老虎机手机版

 

 

  

3. The requirement to the raw materials

    1. PCE: ≥99.8%

    2. AHF: ≥99.95%

    3. Catalytic agent 1: Industrial grade

    4. Catalytic agent 2: Industrial grade

    5. Liquid caustic: 30%

 

 

4. Tons products’ raw materials and energy consumption

No.

Name

Unit

Unit Consumption

1

PCE

t

1.404

2

AHF

t

0.858

3

catalytic agent 1

t

0.0004

4

catalytic agent 2

t

0.0004

5

30% liquid caustic

t

0.01

6

Vapour

t

1.5

7

Process water

t

2.0

8

Electricity

kwh

550

9

Freezing saline water

×104 kcal

135

10

Instrument air

Nm3

32

11

Nitrogen

Nm3

0.4

 

 

5. Dingsheng company’s technical Service contents

    Dingsheng company’s technical Service contents as following:

1. Process design

1.Using standard list in engineering design

2. Process diagram

3. Process and Pipping flowsheet(P&I D)

4. Raw materials(auxiliary materials), public engineering instruction

5. Products and main byproducts quality specification instruction

6. Materials equilibrium diagram

7. Energy equilibrium diagram

8. Stream information diagram

9.  Pipping schedule

10. Valve schedule

11.Heat and cold insulation Technical Condition of equipment and pipping

12. The main arrangement project of factory ( or workshop)

2. Equipment

1.The schedule of main equipment names and quantities

2. Outsourcing equipments data sheet

3.The arrangement diagram of equipment level elevation

4. All non-standard equipment condition diagram

5. Equipment motive power schedule

6. Equipment technical specification schedule

7.Outsourcing equipment specification list

8. Equipment spare parts

4. Process operation manual

1. Process designing instruction

2. The handbook of factory starting, running and stopping

3. The operation condition and parameter of process

4. The suggestion of accident prevention and environment protection

5. The list of Maintenance regulation, inspection frequency and relative data

6. All index analytical method of products and raw materials

7. MSDS of raw materials and products

8. Test Running project

3. Electric and instrument

1.Electric condition list

2. Instrument condition list

3.Electric installing requirement

4. The load data of electric motor list, connecting and running

5. Electric connecting diagram

6. The chain system diagram of electric and instrument

7. Cable specification list

8. Instrument designing data list

9. Instrument data wire specification list

10. DCS configuration instruction

5.Engineering and structure project

1. All equipment load data and bracing structures with materials

2. The antiseptic suggestion of buildings and structures

3. Equipment basic designing data

4. The antiseptic suggestion of underground pipping

 

    1. Technical exchange of preliminary design and detail engineering design

    2. Revise some preliminary design according to  owners’ actual condition

    3. Check and accept detail engineering diagram and data

    4. Technical disclosure before equipment installing

    5. Assist workers training according to the operation manual

    6. Assist production line test running

    7. Assist capability testing to the production line

    8. Other services required from owners within contract

 

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