polypropylene production

The certain CO., Ltd. (hereinafter referred to as party A) signed the following contract with Shandong Xunda chemical group CO., Ltd. (hereinafter referred to as party B) according to refining catalyst for propylene that 100 thousand t/year propylene project equipment required.

Z919

Ambient Temperature Zinc Oxide Sulfur Remover

RAs988

Strip Shaped Arsenic Remover

loading scheme

1. Inlet propylene quantity: 12.5t/h, about 28m3/h

2. Pipeline size of inlet and outlet: DN100

3. Composition order and operating situation of refining system:

Caustic soda tower (2, connection)-hydrolysis and desulfurization tower (1, hydrolysis at lower, desulfurization at upper)-3A molecular sieve tower (2, one start and one preparation)-arsenic removal tower (1)-3A molecular sieve tower (2, one start and one preparation), total 8 units, actual operation is 6

4. Material indexes of propylene:

H2O (<50ppm), S (<5ppm), O2 (<10ppm), CO2 (<10ppm), CO (<5ppm), As (<1ppm), propyne (<5ppm), diene (<20ppm), C4 composition (no)

5. Propylene indexes after refining

H2O (<10ppm), S (<1ppm), O2 (<5ppm), CO2 (<5ppm), CO (<2ppm), As (<0.03ppm), propyne (<2ppm), diene (<5ppm), C4 composition (no)

performance and effect

Various requirements of operating situation and operating elasticity that based on the requirements of design base, the guaranteed values of each refining agent performance are as follows:

Lifetime: at the beginning of the introduction, the lifetime of A911 COS hydrolysis agent and Z919 refining desulfurizer is 3 years, the lifetime of 3A molecular sieve is more than 4 years, the lifetime of Ras988 arsenic remover is more than 5 years

Impurities removal performance: at the condition of processing design, the impurities removal accuracy of propylene inlet and outlet see in table 2

Table  pre-removal accuracy of impurities in propylene refining unit